Build as C++

1 files changed, 0 insertions, 6430 deletions

diff --git a/src/check_expr.c b/src/check_expr.c
deleted file mode 100644
index 1ed7378e5..000000000
--- a/src/check_expr.c
+++ /dev/null
@@ -1,6430 +0,0 @@
-void     check_expr                     (Checker *c, Operand *operand, AstNode *expression);
-void     check_multi_expr               (Checker *c, Operand *operand, AstNode *expression);
-void     check_expr_or_type             (Checker *c, Operand *operand, AstNode *expression);
-ExprKind check_expr_base                (Checker *c, Operand *operand, AstNode *expression, Type *type_hint);
-Type *   check_type_extra               (Checker *c, AstNode *expression, Type *named_type);
-Type *   check_type                     (Checker *c, AstNode *expression);
-void     check_type_decl                (Checker *c, Entity *e, AstNode *type_expr, Type *def);
-Entity * check_selector                 (Checker *c, Operand *operand, AstNode *node, Type *type_hint);
-void     check_not_tuple                (Checker *c, Operand *operand);
-void     convert_to_typed               (Checker *c, Operand *operand, Type *target_type, i32 level);
-gbString expr_to_string                 (AstNode *expression);
-void     check_entity_decl              (Checker *c, Entity *e, DeclInfo *decl, Type *named_type);
-void     check_const_decl               (Checker *c, Entity *e, AstNode *type_expr, AstNode *init_expr, Type *named_type);
-void     check_proc_body                (Checker *c, Token token, DeclInfo *decl, Type *type, AstNode *body);
-void     update_expr_type               (Checker *c, AstNode *e, Type *type, bool final);
-bool     check_is_terminating           (AstNode *node);
-bool     check_has_break                (AstNode *stmt, bool implicit);
-void     check_stmt                     (Checker *c, AstNode *node, u32 flags);
-void     check_stmt_list                (Checker *c, AstNodeArray stmts, u32 flags);
-void     check_init_constant            (Checker *c, Entity *e, Operand *operand);
-bool     check_representable_as_constant(Checker *c, ExactValue in_value, Type *type, ExactValue *out_value);
-Type *   check_call_arguments           (Checker *c, Operand *operand, Type *proc_type, AstNode *call);
-
-
-gb_inline Type *check_type(Checker *c, AstNode *expression) {
-	return check_type_extra(c, expression, NULL);
-}
-
-
-void error_operand_not_expression(Operand *o) {
-	if (o->mode == Addressing_Type) {
-		gbString err = expr_to_string(o->expr);
-		error_node(o->expr, "`%s` is not an expression but a type", err);
-		gb_string_free(err);
-		o->mode = Addressing_Invalid;
-	}
-}
-
-void error_operand_no_value(Operand *o) {
-	if (o->mode == Addressing_NoValue) {
-		gbString err = expr_to_string(o->expr);
-		error_node(o->expr, "`%s` used as value", err);
-		gb_string_free(err);
-		o->mode = Addressing_Invalid;
-	}
-}
-
-
-void check_scope_decls(Checker *c, AstNodeArray nodes, isize reserve_size) {
-	Scope *s = c->context.scope;
-	GB_ASSERT(!s->is_file);
-
-	check_collect_entities(c, nodes, false);
-
-	for_array(i, s->elements.entries) {
-		Entity *e = s->elements.entries.e[i].value;
-		switch (e->kind) {
-		case Entity_Constant:
-		case Entity_TypeName:
-		case Entity_Procedure:
-			break;
-		default:
-			continue;
-		}
-		DeclInfo **found = map_decl_info_get(&c->info.entities, hash_pointer(e));
-		if (found != NULL) {
-			DeclInfo *d = *found;
-			check_entity_decl(c, e, d, NULL);
-		}
-	}
-
-	for_array(i, s->elements.entries) {
-		Entity *e = s->elements.entries.e[i].value;
-		if (e->kind != Entity_Procedure) {
-			continue;
-		}
-		check_procedure_overloading(c, e);
-	}
-}
-
-
-bool check_is_assignable_to_using_subtype(Type *src, Type *dst) {
-	bool src_is_ptr = false;
-	Type *prev_src = src;
-	src = type_deref(src);
-	src_is_ptr = src != prev_src;
-	src = base_type(src);
-
-	if (!is_type_struct(src) && !is_type_union(src)) {
-		return false;
-	}
-
-	for (isize i = 0; i < src->Record.field_count; i++) {
-		Entity *f = src->Record.fields[i];
-		if (f->kind != Entity_Variable || (f->flags&EntityFlag_Using) == 0) {
-			continue;
-		}
-
-		if (are_types_identical(f->type, dst)) {
-			return true;
-		}
-		if (src_is_ptr && is_type_pointer(dst)) {
-			if (are_types_identical(f->type, type_deref(dst))) {
-				return true;
-			}
-		}
-		bool ok = check_is_assignable_to_using_subtype(f->type, dst);
-		if (ok) {
-			return true;
-		}
-	}
-
-	return false;
-}
-
-
-// IMPORTANT TODO(bill): figure out the exact distance rules
-// -1 is not convertable
-// 0 is exact
-// >0 is convertable
-
-i64 check_distance_between_types(Checker *c, Operand *operand, Type *type) {
-	if (operand->mode == Addressing_Invalid ||
-	    type == t_invalid) {
-		return 0;
-	}
-
-	if (operand->mode == Addressing_Builtin) {
-		return -1;
-	}
-
-	Type *s = operand->type;
-
-	if (are_types_identical(s, type)) {
-		return 0;
-	}
-
-	Type *src = base_type(s);
-	Type *dst = base_type(type);
-
-	if (is_type_untyped_nil(src)) {
-		if (type_has_nil(dst)) {
-			return 1;
-		}
-		return -1;
-	}
-	if (is_type_untyped(src)) {
-		if (is_type_any(dst)) {
-			// NOTE(bill): Anything can cast to `Any`
-			add_type_info_type(c, s);
-			return 10;
-		}
-		if (dst->kind == Type_Basic) {
-			if (operand->mode == Addressing_Constant) {
-				if (check_representable_as_constant(c, operand->value, dst, NULL)) {
-					if (is_type_typed(dst) && src->kind == Type_Basic) {
-						switch (src->Basic.kind) {
-						case Basic_UntypedInteger:
-							if (is_type_integer(dst) || is_type_rune(dst)) {
-								return 1;
-							}
-							break;
-						case Basic_UntypedFloat:
-							if (is_type_float(dst)) {
-								return 1;
-							}
-							break;
-						case Basic_UntypedComplex:
-							if (is_type_complex(dst)) {
-								return 1;
-							}
-							break;
-						}
-					}
-					return 2;
-				}
-				return -1;
-			}
-			if (src->kind == Type_Basic && src->Basic.kind == Basic_UntypedBool) {
-				if (is_type_boolean(dst)) {
-					if (is_type_typed(type)) {
-						return 2;
-					}
-					return 1;
-				}
-				return -1;
-			}
-		}
-	}
-
-	if (are_types_identical(dst, src) && (!is_type_named(dst) || !is_type_named(src))) {
-		return 1;
-	}
-
-
-	if (is_type_bit_field_value(operand->type) && is_type_integer(type)) {
-		Type *bfv = base_type(operand->type);
-		i32 bits = bfv->BitFieldValue.bits;
-		i32 size = next_pow2((bits+7)/8);
-		i32 dst_size = type_size_of(c->allocator, type);
-		i32 diff = gb_abs(dst_size - size);
-		// TODO(bill): figure out a decent rule here
-		return 1;
-	}
-
-
-	if (check_is_assignable_to_using_subtype(operand->type, type)) {
-		return 4;
-	}
-
-	// ^T <- rawptr
-#if 0
-	// TODO(bill): Should C-style (not C++) pointer cast be allowed?
-	if (is_type_pointer(dst) && is_type_rawptr(src)) {
-	    return true;
-	}
-#endif
-#if 1
-
-
-	// TODO(bill): Should I allow this implicit conversion at all?!
-	// rawptr <- ^T
-	if (are_types_identical(type, t_rawptr) && is_type_pointer(src)) {
-	    return 5;
-	}
-#endif
-
-	if (is_type_union(dst)) {
-		for (isize i = 0; i < dst->Record.variant_count; i++) {
-			Entity *f = dst->Record.variants[i];
-			if (are_types_identical(f->type, s)) {
-				return 1;
-			}
-		}
-	}
-
-	if (is_type_proc(dst)) {
-		if (are_types_identical(src, dst)) {
-			return 3;
-		}
-	}
-
-	if (is_type_vector(dst)) {
-		Type *elem = base_vector_type(dst);
-		i64 distance = check_distance_between_types(c, operand, elem);
-		if (distance >= 0) {
-			return distance + 5;
-		}
-	}
-
-
-	if (is_type_any(dst)) {
-		// NOTE(bill): Anything can cast to `Any`
-		add_type_info_type(c, s);
-		return 10;
-	}
-
-
-
-	return -1;
-}
-
-
-bool check_is_assignable_to_with_score(Checker *c, Operand *operand, Type *type, i64 *score_) {
-	i64 score = 0;
-	i64 distance = check_distance_between_types(c, operand, type);
-	bool ok = distance >= 0;
-	if (ok) {
-		// TODO(bill): A decent score function
-		score = gb_max(1000000 - distance*distance, 0);
-	}
-	if (score_) *score_ = score;
-	return ok;
-}
-
-
-bool check_is_assignable_to(Checker *c, Operand *operand, Type *type) {
-	i64 score = 0;
-	return check_is_assignable_to_with_score(c, operand, type, &score);
-}
-
-
-// NOTE(bill): `content_name` is for debugging and error messages
-void check_assignment(Checker *c, Operand *operand, Type *type, String context_name) {
-	check_not_tuple(c, operand);
-	if (operand->mode == Addressing_Invalid) {
-		return;
-	}
-
-	if (is_type_untyped(operand->type)) {
-		Type *target_type = type;
-		if (type == NULL || is_type_any(type)) {
-			if (type == NULL && is_type_untyped_nil(operand->type)) {
-				error_node(operand->expr, "Use of untyped nil in %.*s", LIT(context_name));
-				operand->mode = Addressing_Invalid;
-				return;
-			}
-			target_type = default_type(operand->type);
-			if (type != NULL && !is_type_any(type)) {
-				GB_ASSERT_MSG(is_type_typed(target_type), "%s", type_to_string(type));
-			}
-			add_type_info_type(c, type);
-			add_type_info_type(c, target_type);
-		}
-
-		if (target_type != NULL && is_type_vector(target_type)) {
-			// NOTE(bill): continue to below
-		} else {
-			convert_to_typed(c, operand, target_type, 0);
-			if (operand->mode == Addressing_Invalid) {
-				return;
-			}
-		}
-	}
-
-	if (type == NULL) {
-		return;
-	}
-
-	if (!check_is_assignable_to(c, operand, type)) {
-		gbString type_str    = type_to_string(type);
-		gbString op_type_str = type_to_string(operand->type);
-		gbString expr_str    = expr_to_string(operand->expr);
-
-		if (operand->mode == Addressing_Builtin) {
-			// TODO(bill): is this a good enough error message?
-			// TODO(bill): Actually allow built in procedures to be passed around and thus be created on use
-			error_node(operand->expr,
-			           "Cannot assign builtin procedure `%s` in %.*s",
-			           expr_str,
-			           LIT(context_name));
-		} else {
-			// TODO(bill): is this a good enough error message?
-			error_node(operand->expr,
-			           "Cannot assign value `%s` of type `%s` to `%s` in %.*s",
-			           expr_str,
-			           op_type_str,
-			           type_str,
-			           LIT(context_name));
-		}
-		operand->mode = Addressing_Invalid;
-
-		gb_string_free(expr_str);
-		gb_string_free(op_type_str);
-		gb_string_free(type_str);
-		return;
-	}
-}
-
-
-void populate_using_entity_map(Checker *c, AstNode *node, Type *t, MapEntity *entity_map) {
-	t = base_type(type_deref(t));
-	gbString str = NULL;
-	if (node != NULL) {
-		expr_to_string(node);
-	}
-
-	if (t->kind == Type_Record) {
-		for (isize i = 0; i < t->Record.field_count; i++) {
-			Entity *f = t->Record.fields[i];
-			GB_ASSERT(f->kind == Entity_Variable);
-			String name = f->token.string;
-			HashKey key = hash_string(name);
-			Entity **found = map_entity_get(entity_map, key);
-			if (found != NULL) {
-				Entity *e = *found;
-				// TODO(bill): Better type error
-				if (str != NULL) {
-					error(e->token, "`%.*s` is already declared in `%s`", LIT(name), str);
-				} else {
-					error(e->token, "`%.*s` is already declared`", LIT(name));
-				}
-			} else {
-				map_entity_set(entity_map, key, f);
-				add_entity(c, c->context.scope, NULL, f);
-				if (f->flags & EntityFlag_Using) {
-					populate_using_entity_map(c, node, f->type, entity_map);
-				}
-			}
-		}
-	}
-
-	gb_string_free(str);
-}
-
-
-// Returns filled field_count
-isize check_fields(Checker *c, AstNode *node, AstNodeArray decls,
-                   Entity **fields, isize field_count,
-                   String context) {
-	gbTempArenaMemory tmp = gb_temp_arena_memory_begin(&c->tmp_arena);
-
-	MapEntity entity_map = {0};
-	map_entity_init_with_reserve(&entity_map, c->tmp_allocator, 2*field_count);
-
-	Entity *using_index_expr = NULL;
-
-	if (node != NULL) {
-		GB_ASSERT(node->kind != AstNode_UnionType);
-	}
-
-	isize field_index = 0;
-	for_array(decl_index, decls) {
-		AstNode *decl = decls.e[decl_index];
-		if (decl->kind != AstNode_Field) {
-			continue;
-		}
-		ast_node(f, Field, decl);
-
-		Type *type = check_type(c, f->type);
-		bool is_using = (f->flags&FieldFlag_using) != 0;
-
-		if (is_using) {
-			if (f->names.count > 1) {
-				error_node(f->names.e[0], "Cannot apply `using` to more than one of the same type");
-				is_using = false;
-			}
-		}
-
-		for_array(name_index, f->names) {
-			AstNode *name = f->names.e[name_index];
-			if (!ast_node_expect(name, AstNode_Ident)) {
-				continue;
-			}
-
-			Token name_token = name->Ident;
-
-			Entity *e = make_entity_field(c->allocator, c->context.scope, name_token, type, is_using, cast(i32)field_index);
-			e->identifier = name;
-			if (str_eq(name_token.string, str_lit("_"))) {
-				fields[field_index++] = e;
-			} else if (str_eq(name_token.string, str_lit("__tag"))) {
-				error_node(name, "`__tag` is a reserved identifier for fields");
-			} else {
-				HashKey key = hash_string(name_token.string);
-				Entity **found = map_entity_get(&entity_map, key);
-				if (found != NULL) {
-					Entity *e = *found;
-					// NOTE(bill): Scope checking already checks the declaration but in many cases, this can happen so why not?
-					// This may be a little janky but it's not really that much of a problem
-					error(name_token, "`%.*s` is already declared in this type", LIT(name_token.string));
-					error(e->token,   "\tpreviously declared");
-				} else {
-					map_entity_set(&entity_map, key, e);
-					fields[field_index++] = e;
-					add_entity(c, c->context.scope, name, e);
-				}
-				add_entity_use(c, name, e);
-			}
-		}
-
-
-		if (is_using) {
-			Type *t = base_type(type_deref(type));
-			if (!is_type_struct(t) && !is_type_raw_union(t) && !is_type_bit_field(t) &&
-			    f->names.count >= 1 &&
-			    f->names.e[0]->kind == AstNode_Ident) {
-				Token name_token = f->names.e[0]->Ident;
-				if (is_type_indexable(t)) {
-					bool ok = true;
-					for_array(emi, entity_map.entries) {
-						Entity *e = entity_map.entries.e[emi].value;
-						if (e->kind == Entity_Variable && e->flags & EntityFlag_Using) {
-							if (is_type_indexable(e->type)) {
-								if (e->identifier != f->names.e[0]) {
-									ok = false;
-									using_index_expr = e;
-									break;
-								}
-							}
-						}
-					}
-					if (ok) {
-						using_index_expr = fields[field_index-1];
-					} else {
-						fields[field_index-1]->flags &= ~EntityFlag_Using;
-						error(name_token, "Previous `using` for an index expression `%.*s`", LIT(name_token.string));
-					}
-				} else {
-					gbString type_str = type_to_string(type);
-					error(name_token, "`using` cannot be applied to the field `%.*s` of type `%s`", LIT(name_token.string), type_str);
-					gb_string_free(type_str);
-					continue;
-				}
-			}
-
-			populate_using_entity_map(c, node, type, &entity_map);
-		}
-	}
-
-	gb_temp_arena_memory_end(tmp);
-
-	return field_index;
-}
-
-
-// TODO(bill): Cleanup struct field reordering
-// TODO(bill): Inline sorting procedure?
-gb_global gbAllocator   __checker_allocator = {0};
-
-GB_COMPARE_PROC(cmp_reorder_struct_fields) {
-	// Rule:
-	// `using` over non-`using`
-	// Biggest to smallest alignment
-	// if same alignment: biggest to smallest size
-	// if same size: order by source order
-	Entity *x = *(Entity **)a;
-	Entity *y = *(Entity **)b;
-	GB_ASSERT(x != NULL);
-	GB_ASSERT(y != NULL);
-	GB_ASSERT(x->kind == Entity_Variable);
-	GB_ASSERT(y->kind == Entity_Variable);
-	bool xu = (x->flags & EntityFlag_Using) != 0;
-	bool yu = (y->flags & EntityFlag_Using) != 0;
-	i64 xa = type_align_of(__checker_allocator, x->type);
-	i64 ya = type_align_of(__checker_allocator, y->type);
-	i64 xs = type_size_of(__checker_allocator, x->type);
-	i64 ys = type_size_of(__checker_allocator, y->type);
-
-	if (xu != yu) {
-		return xu ? -1 : +1;
-	}
-
-	if (xa != ya) {
-		return xa > ya ? -1 : xa < ya;
-	}
-	if (xs != ys) {
-		return xs > ys ? -1 : xs < ys;
-	}
-	i32 diff = x->Variable.field_index - y->Variable.field_index;
-	return diff < 0 ? -1 : diff > 0;
-}
-
-Entity *make_names_field_for_record(Checker *c, Scope *scope) {
-	Entity *e = make_entity_field(c->allocator, scope,
-		make_token_ident(str_lit("names")), t_string_slice, false, 0);
-	e->Variable.is_immutable = true;
-	e->flags |= EntityFlag_TypeField;
-	return e;
-}
-
-void check_struct_type(Checker *c, Type *struct_type, AstNode *node) {
-	GB_ASSERT(is_type_struct(struct_type));
-	ast_node(st, StructType, node);
-
-	isize field_count = 0;
-	for_array(field_index, st->fields) {
-	AstNode *field = st->fields.e[field_index];
-		switch (field->kind) {
-		case_ast_node(f, Field, field);
-			field_count += f->names.count;
-		case_end;
-		}
-	}
-
-	Entity **fields = gb_alloc_array(c->allocator, Entity *, field_count);
-
-	field_count = check_fields(c, node, st->fields, fields, field_count, str_lit("struct"));
-
-	struct_type->Record.is_packed           = st->is_packed;
-	struct_type->Record.is_ordered          = st->is_ordered;
-	struct_type->Record.fields              = fields;
-	struct_type->Record.fields_in_src_order = fields;
-	struct_type->Record.field_count         = field_count;
-	struct_type->Record.names = make_names_field_for_record(c, c->context.scope);
-
-	type_set_offsets(c->allocator, struct_type);
-
-
-	if (!struct_type->failure && !st->is_packed && !st->is_ordered) {
-		struct_type->failure = false;
-		struct_type->Record.are_offsets_set = false;
-		struct_type->Record.offsets = NULL;
-		// NOTE(bill): Reorder fields for reduced size/performance
-
-		Entity **reordered_fields = gb_alloc_array(c->allocator, Entity *, field_count);
-		for (isize i = 0; i < field_count; i++) {
-			reordered_fields[i] = struct_type->Record.fields_in_src_order[i];
-		}
-
-		// NOTE(bill): Hacky thing
-		// TODO(bill): Probably make an inline sorting procedure rather than use global variables
-		__checker_allocator = c->allocator;
-		// NOTE(bill): compound literal order must match source not layout
-		gb_sort_array(reordered_fields, field_count, cmp_reorder_struct_fields);
-
-		for (isize i = 0; i < field_count; i++) {
-			reordered_fields[i]->Variable.field_index = i;
-		}
-
-		struct_type->Record.fields = reordered_fields;
-	}
-
-	type_set_offsets(c->allocator, struct_type);
-
-
-	if (st->align != NULL) {
-		if (st->is_packed) {
-			syntax_error_node(st->align, "`#align` cannot be applied with `#packed`");
-			return;
-		}
-
-		Operand o = {0};
-		check_expr(c, &o, st->align);
-		if (o.mode != Addressing_Constant) {
-			if (o.mode != Addressing_Invalid) {
-				error_node(st->align, "#align must be a constant");
-			}
-			return;
-		}
-
-		Type *type = base_type(o.type);
-		if (is_type_untyped(type) || is_type_integer(type)) {
-			if (o.value.kind == ExactValue_Integer) {
-				i64 align = i128_to_i64(o.value.value_integer);
-				if (align < 1 || !gb_is_power_of_two(align)) {
-					error_node(st->align, "#align must be a power of 2, got %lld", align);
-					return;
-				}
-
-				// NOTE(bill): Success!!!
-				i64 custom_align = gb_clamp(align, 1, build_context.max_align);
-				if (custom_align < align) {
-					warning_node(st->align, "Custom alignment has been clamped to %lld from %lld", align, custom_align);
-				}
-				struct_type->Record.custom_align = custom_align;
-				return;
-			}
-		}
-
-		error_node(st->align, "#align must be an integer");
-		return;
-	}
-
-
-}
-void check_union_type(Checker *c, Type *union_type, AstNode *node) {
-	GB_ASSERT(is_type_union(union_type));
-	ast_node(ut, UnionType, node);
-
-	isize variant_count = ut->variants.count+1;
-	isize field_count = 0;
-	for_array(i, ut->fields) {
-		AstNode *field = ut->fields.e[i];
-		if (field->kind == AstNode_Field) {
-			ast_node(f, Field, field);
-			field_count += f->names.count;
-		}
-	}
-
-	gbTempArenaMemory tmp = gb_temp_arena_memory_begin(&c->tmp_arena);
-
-	MapEntity entity_map = {0}; // Key: String
-	map_entity_init_with_reserve(&entity_map, c->tmp_allocator, 2*variant_count);
-
-	Entity *using_index_expr = NULL;
-
-	Entity **variants = gb_alloc_array(c->allocator, Entity *, variant_count);
-	Entity **fields = gb_alloc_array(c->allocator, Entity *, field_count);
-
-	isize variant_index = 0;
-	variants[variant_index++] = make_entity_type_name(c->allocator, c->context.scope, empty_token, NULL);
-
-	field_count = check_fields(c, NULL, ut->fields, fields, field_count, str_lit("union"));
-
-	for (isize i = 0; i < field_count; i++) {
-		Entity *f = fields[i];
-		String name = f->token.string;
-		map_entity_set(&entity_map, hash_string(name), f);
-	}
-
-	union_type->Record.fields              = fields;
-	union_type->Record.fields_in_src_order = fields;
-	union_type->Record.field_count         = field_count;
-	union_type->Record.are_offsets_set     = false;
-	union_type->Record.is_ordered          = true;
-	{
-		Entity *__tag = make_entity_field(c->allocator, NULL, make_token_ident(str_lit("__tag")), t_int, false, -1);
-		union_type->Record.union__tag = __tag;
-	}
-
-	for_array(i, ut->variants) {
-		AstNode *variant = ut->variants.e[i];
-		if (variant->kind != AstNode_UnionField) {
-			continue;
-		}
-		ast_node(f, UnionField, variant);
-		Token name_token = f->name->Ident;
-
-		Type *base_type = make_type_struct(c->allocator);
-		{
-			ast_node(fl, FieldList, f->list);
-
-			// NOTE(bill): Copy the contents for the common fields for now
-			AstNodeArray list = {0};
-			array_init_count(&list, c->allocator, ut->fields.count+fl->list.count);
-			gb_memmove_array(list.e, ut->fields.e, ut->fields.count);
-			gb_memmove_array(list.e+ut->fields.count, fl->list.e, fl->list.count);
-
-			isize list_count = 0;
-			for_array(j, list) {
-				ast_node(f, Field, list.e[j]);
-				list_count += f->names.count;
-			}
-
-
-			Token token = name_token;
-			token.kind = Token_struct;
-			AstNode *dummy_struct = ast_struct_type(c->curr_ast_file, token, list, list_count, false, true, NULL);
-
-			check_open_scope(c, dummy_struct);
-			Entity **fields = gb_alloc_array(c->allocator, Entity *, list_count);
-			isize field_count = check_fields(c, dummy_struct, list, fields, list_count, str_lit("variant"));
-			base_type->Record.is_packed           = false;
-			base_type->Record.is_ordered          = true;
-			base_type->Record.fields              = fields;
-			base_type->Record.fields_in_src_order = fields;
-			base_type->Record.field_count         = field_count;
-			base_type->Record.names = make_names_field_for_record(c, c->context.scope);
-			base_type->Record.node = dummy_struct;
-
-			type_set_offsets(c->allocator, base_type);
-
-			check_close_scope(c);
-		}
-
-		Type *type = make_type_named(c->allocator, name_token.string, base_type, NULL);
-		Entity *e = make_entity_type_name(c->allocator, c->context.scope, name_token, type);
-		type->Named.type_name = e;
-		add_entity(c, c->context.scope, f->name, e);
-
-		if (str_eq(name_token.string, str_lit("_"))) {
-			error(name_token, "`_` cannot be used a union subtype");
-			continue;
-		}
-
-		HashKey key = hash_string(name_token.string);
-		if (map_entity_get(&entity_map, key) != NULL) {
-			// NOTE(bill): Scope checking already checks the declaration
-			error(name_token, "`%.*s` is already declared in this union", LIT(name_token.string));
-		} else {
-			map_entity_set(&entity_map, key, e);
-			variants[variant_index++] = e;
-		}
-		add_entity_use(c, f->name, e);
-	}
-
-	type_set_offsets(c->allocator, union_type);
-
-	gb_temp_arena_memory_end(tmp);
-
-	union_type->Record.variants      = variants;
-	union_type->Record.variant_count = variant_index;
-}
-
-void check_raw_union_type(Checker *c, Type *union_type, AstNode *node) {
-	GB_ASSERT(node->kind == AstNode_RawUnionType);
-	GB_ASSERT(is_type_raw_union(union_type));
-	ast_node(ut, RawUnionType, node);
-
-	isize field_count = 0;
-	for_array(field_index, ut->fields) {
-		AstNode *field = ut->fields.e[field_index];
-		switch (field->kind) {
-		case_ast_node(f, Field, field);
-			field_count += f->names.count;
-		case_end;
-		}
-	}
-
-	Entity **fields = gb_alloc_array(c->allocator, Entity *, field_count);
-
-	field_count = check_fields(c, node, ut->fields, fields, field_count, str_lit("raw_union"));
-
-	union_type->Record.fields = fields;
-	union_type->Record.field_count = field_count;
-	union_type->Record.names = make_names_field_for_record(c, c->context.scope);
-}
-
-
-void check_enum_type(Checker *c, Type *enum_type, Type *named_type, AstNode *node) {
-	ast_node(et, EnumType, node);
-	GB_ASSERT(is_type_enum(enum_type));
-
-	gbTempArenaMemory tmp = gb_temp_arena_memory_begin(&c->tmp_arena);
-
-	Type *base_type = t_int;
-	if (et->base_type != NULL) {
-		base_type = check_type(c, et->base_type);
-	}
-
-	if (base_type == NULL || !(is_type_integer(base_type) || is_type_float(base_type))) {
-		error_node(node, "Base type for enumeration must be numeric");
-		return;
-	}
-	if (is_type_enum(base_type)) {
-		error_node(node, "Base type for enumeration cannot be another enumeration");
-		return;
-	}
-
-	// NOTE(bill): Must be up here for the `check_init_constant` system
-	enum_type->Record.enum_base_type = base_type;
-
-	MapEntity entity_map = {0}; // Key: String
-	map_entity_init_with_reserve(&entity_map, c->tmp_allocator, 2*(et->fields.count));
-
-	Entity **fields = gb_alloc_array(c->allocator, Entity *, et->fields.count);
-	isize field_count = 0;
-
-	Type *constant_type = enum_type;
-	if (named_type != NULL) {
-		constant_type = named_type;
-	}
-
-	ExactValue iota = exact_value_i64(-1);
-	ExactValue min_value = exact_value_i64(0);
-	ExactValue max_value = exact_value_i64(0);
-
-	for_array(i, et->fields) {
-		AstNode *field = et->fields.e[i];
-		AstNode *ident = NULL;
-		AstNode *init = NULL;
-		if (field->kind == AstNode_FieldValue) {
-			ast_node(fv, FieldValue, field);
-			if (fv->field == NULL || fv->field->kind != AstNode_Ident) {
-				error_node(field, "An enum field's name must be an identifier");
-				continue;
-			}
-			ident = fv->field;
-			init = fv->value;
-		} else if (field->kind == AstNode_Ident) {
-			ident = field;
-		} else {
-			error_node(field, "An enum field's name must be an identifier");
-			continue;
-		}
-		String name = ident->Ident.string;
-
-		if (init != NULL) {
-			Operand o = {0};
-			check_expr(c, &o, init);
-			if (o.mode != Addressing_Constant) {
-				error_node(init, "Enumeration value must be a constant");
-				o.mode = Addressing_Invalid;
-			}
-			if (o.mode != Addressing_Invalid) {
-				check_assignment(c, &o, constant_type, str_lit("enumeration"));
-			}
-			if (o.mode != Addressing_Invalid) {
-				iota = o.value;
-			} else {
-				iota = exact_binary_operator_value(Token_Add, iota, exact_value_i64(1));
-			}
-		} else {
-			iota = exact_binary_operator_value(Token_Add, iota, exact_value_i64(1));
-		}
-
-
-		// NOTE(bill): Skip blank identifiers
-		if (str_eq(name, str_lit("_"))) {
-			continue;
-		} else if (str_eq(name, str_lit("count"))) {
-			error_node(field, "`count` is a reserved identifier for enumerations");
-			continue;
-		} else if (str_eq(name, str_lit("min_value"))) {
-			error_node(field, "`min_value` is a reserved identifier for enumerations");
-			continue;
-		} else if (str_eq(name, str_lit("max_value"))) {
-			error_node(field, "`max_value` is a reserved identifier for enumerations");
-			continue;
-		} else if (str_eq(name, str_lit("names"))) {
-			error_node(field, "`names` is a reserved identifier for enumerations");
-			continue;
-		}/*  else if (str_eq(name, str_lit("base_type"))) {
-			error_node(field, "`base_type` is a reserved identifier for enumerations");
-			continue;
-		} */
-
-		if (compare_exact_values(Token_Gt, min_value, iota)) {
-			min_value = iota;
-		}
-		if (compare_exact_values(Token_Lt, max_value, iota)) {
-			max_value = iota;
-		}
-
-		Entity *e = make_entity_constant(c->allocator, c->context.scope, ident->Ident, constant_type, iota);
-		e->identifier = ident;
-		e->flags |= EntityFlag_Visited;
-
-		HashKey key = hash_string(name);
-		if (map_entity_get(&entity_map, key) != NULL) {
-			error_node(ident, "`%.*s` is already declared in this enumeration", LIT(name));
-		} else {
-			map_entity_set(&entity_map, key, e);
-			add_entity(c, c->context.scope, NULL, e);
-			fields[field_count++] = e;
-			add_entity_use(c, field, e);
-		}
-	}
-	GB_ASSERT(field_count <= et->fields.count);
-	gb_temp_arena_memory_end(tmp);
-
-
-	enum_type->Record.fields = fields;
-	enum_type->Record.field_count = field_count;
-
-	enum_type->Record.enum_count = make_entity_constant(c->allocator, c->context.scope,
-		make_token_ident(str_lit("count")), t_int, exact_value_i64(field_count));
-	enum_type->Record.enum_min_value = make_entity_constant(c->allocator, c->context.scope,
-		make_token_ident(str_lit("min_value")), constant_type, min_value);
-	enum_type->Record.enum_max_value = make_entity_constant(c->allocator, c->context.scope,
-		make_token_ident(str_lit("max_value")), constant_type, max_value);
-
-	enum_type->Record.names = make_names_field_for_record(c, c->context.scope);
-}
-
-
-void check_bit_field_type(Checker *c, Type *bit_field_type, Type *named_type, AstNode *node) {
-	ast_node(bft, BitFieldType, node);
-	GB_ASSERT(is_type_bit_field(bit_field_type));
-
-	gbTempArenaMemory tmp = gb_temp_arena_memory_begin(&c->tmp_arena);
-
-
-	MapEntity entity_map = {0}; // Key: String
-	map_entity_init_with_reserve(&entity_map, c->tmp_allocator, 2*(bft->fields.count));
-
-	isize field_count = 0;
-	Entity **fields  = gb_alloc_array(c->allocator, Entity *, bft->fields.count);
-	u32 *    sizes   = gb_alloc_array(c->allocator, u32,      bft->fields.count);
-	u32 *    offsets = gb_alloc_array(c->allocator, u32,      bft->fields.count);
-
-	u32 curr_offset = 0;
-	for_array(i, bft->fields) {
-		AstNode *field = bft->fields.e[i];
-		GB_ASSERT(field->kind == AstNode_FieldValue);
-		AstNode *ident = field->FieldValue.field;
-		AstNode *value = field->FieldValue.value;
-
-		if (ident->kind != AstNode_Ident) {
-			error_node(field, "A bit field value's name must be an identifier");
-			continue;
-		}
-		String name = ident->Ident.string;
-
-		Operand o = {0};
-		check_expr(c, &o, value);
-		if (o.mode != Addressing_Constant) {
-			error_node(value, "Bit field bit size must be a constant");
-			continue;
-		}
-		ExactValue v = exact_value_to_integer(o.value);
-		if (v.kind != ExactValue_Integer) {
-			error_node(value, "Bit field bit size must be a constant integer");
-			continue;
-		}
-		i64 bits = i128_to_i64(v.value_integer);
-		if (bits < 0 || bits > 128) {
-			error_node(value, "Bit field's bit size must be within the range 1..<128, got %lld", cast(long long)bits);
-			continue;
-		}
-
-		Type *value_type = make_type_bit_field_value(c->allocator, bits);
-		Entity *e = make_entity_variable(c->allocator, bit_field_type->BitField.scope, ident->Ident, value_type, false);
-		e->identifier = ident;
-		e->flags |= EntityFlag_BitFieldValue;
-
-		HashKey key = hash_string(name);
-		if (str_ne(name, str_lit("_")) &&
-		    map_entity_get(&entity_map, key) != NULL) {
-			error_node(ident, "`%.*s` is already declared in this bit field", LIT(name));
-		} else {
-			map_entity_set(&entity_map, key, e);
-			add_entity(c, c->context.scope, NULL, e);
-			add_entity_use(c, field, e);
-
-			fields [field_count] = e;
-			offsets[field_count] = curr_offset;
-			sizes  [field_count] = bits;
-			field_count++;
-
-			curr_offset += bits;
-		}
-	}
-	GB_ASSERT(field_count <= bft->fields.count);
-	gb_temp_arena_memory_end(tmp);
-
-	bit_field_type->BitField.fields      = fields;
-	bit_field_type->BitField.field_count = field_count;
-	bit_field_type->BitField.sizes       = sizes;
-	bit_field_type->BitField.offsets     = offsets;
-
-
-	if (bft->align != NULL) {
-		Operand o = {0};
-		check_expr(c, &o, bft->align);
-		if (o.mode != Addressing_Constant) {
-			if (o.mode != Addressing_Invalid) {
-				error_node(bft->align, "#align must be a constant");
-			}
-			return;
-		}
-
-		Type *type = base_type(o.type);
-		if (is_type_untyped(type) || is_type_integer(type)) {
-			if (o.value.kind == ExactValue_Integer) {
-				i64 align = i128_to_i64(o.value.value_integer);
-				if (align < 1 || !gb_is_power_of_two(align)) {
-					error_node(bft->align, "#align must be a power of 2, got %lld", align);
-					return;
-				}
-
-				// NOTE(bill): Success!!!
-				i64 custom_align = gb_clamp(align, 1, build_context.max_align);
-				if (custom_align < align) {
-					warning_node(bft->align, "Custom alignment has been clamped to %lld from %lld", align, custom_align);
-				}
-				bit_field_type->BitField.custom_align = custom_align;
-				return;
-			}
-		}
-
-		error_node(bft->align, "#align must be an integer");
-		return;
-	}
-}
-
-
-
-
-Type *check_get_params(Checker *c, Scope *scope, AstNode *_params, bool *is_variadic_) {
-	if (_params == NULL) {
-		return NULL;
-	}
-	ast_node(field_list, FieldList, _params);
-	AstNodeArray params = field_list->list;
-
-	if (params.count == 0) {
-		return NULL;
-	}
-
-	isize variable_count = 0;
-	for_array(i, params) {
-		AstNode *field = params.e[i];
-		if (ast_node_expect(field, AstNode_Field)) {
-			ast_node(f, Field, field);
-			variable_count += gb_max(f->names.count, 1);
-		}
-	}
-
-	bool is_variadic = false;
-	Entity **variables = gb_alloc_array(c->allocator, Entity *, variable_count);
-	isize variable_index = 0;
-	for_array(i, params) {
-		if (params.e[i]->kind != AstNode_Field) {
-			continue;
-		}
-		ast_node(p, Field, params.e[i]);
-		AstNode *type_expr = p->type;
-		if (type_expr) {
-			if (type_expr->kind == AstNode_Ellipsis) {
-				type_expr = type_expr->Ellipsis.expr;
-				if (i+1 == params.count) {
-					is_variadic = true;
-				} else {
-					error_node(params.e[i], "Invalid AST: Invalid variadic parameter");
-				}
-			}
-
-			Type *type = check_type(c, type_expr);
-			if (p->flags&FieldFlag_no_alias) {
-				if (!is_type_pointer(type)) {
-					error_node(params.e[i], "`no_alias` can only be applied to fields of pointer type");
-					p->flags &= ~FieldFlag_no_alias; // Remove the flag
-				}
-			}
-
-			for_array(j, p->names) {
-				AstNode *name = p->names.e[j];
-				if (ast_node_expect(name, AstNode_Ident)) {
-					Entity *param = make_entity_param(c->allocator, scope, name->Ident, type,
-					                                  p->flags&FieldFlag_using, p->flags&FieldFlag_immutable);
-					if (p->flags&FieldFlag_no_alias) {
-						param->flags |= EntityFlag_NoAlias;
-					}
-					if (p->flags&FieldFlag_immutable) {
-						param->Variable.is_immutable = true;
-					}
-					add_entity(c, scope, name, param);
-					variables[variable_index++] = param;
-				}
-			}
-		}
-	}
-
-	variable_count = variable_index;
-
-	if (is_variadic) {
-		GB_ASSERT(params.count > 0);
-		// NOTE(bill): Change last variadic parameter to be a slice
-		// Custom Calling convention for variadic parameters
-		Entity *end = variables[variable_count-1];
-		end->type = make_type_slice(c->allocator, end->type);
-		end->flags |= EntityFlag_Ellipsis;
-	}
-
-	Type *tuple = make_type_tuple(c->allocator);
-	tuple->Tuple.variables = variables;
-	tuple->Tuple.variable_count = variable_count;
-
-	if (is_variadic_) *is_variadic_ = is_variadic;
-
-	return tuple;
-}
-
-Type *check_get_results(Checker *c, Scope *scope, AstNode *_results) {
-	if (_results == NULL) {
-		return NULL;
-	}
-	ast_node(field_list, FieldList, _results);
-	AstNodeArray results = field_list->list;
-
-	if (results.count == 0) {
-		return NULL;
-	}
-	Type *tuple = make_type_tuple(c->allocator);
-
-	isize variable_count = 0;
-	for_array(i, results) {
-		AstNode *field = results.e[i];
-		if (ast_node_expect(field, AstNode_Field)) {
-			ast_node(f, Field, field);
-			variable_count += gb_max(f->names.count, 1);
-		}
-	}
-
-	Entity **variables = gb_alloc_array(c->allocator, Entity *, variable_count);
-	isize variable_index = 0;
-	for_array(i, results) {
-		ast_node(field, Field, results.e[i]);
-		Type *type = check_type(c, field->type);
-		if (field->names.count == 0) {
-			Token token = ast_node_token(field->type);
-			token.string = str_lit("");
-			Entity *param = make_entity_param(c->allocator, scope, token, type, false, false);
-			variables[variable_index++] = param;
-		} else {
-			for_array(j, field->names) {
-				Token token = ast_node_token(field->type);
-				token.string = str_lit("");
-
-				AstNode *name = field->names.e[j];
-				if (name->kind != AstNode_Ident) {
-					error_node(name, "Expected an identifer for as the field name");
-				} else {
-					token = name->Ident;
-				}
-
-				Entity *param = make_entity_param(c->allocator, scope, token, type, false, false);
-				variables[variable_index++] = param;
-			}
-		}
-	}
-
-	for (isize i = 0; i < variable_index; i++) {
-		String x = variables[i]->token.string;
-		if (x.len == 0 || str_eq(x, str_lit("_"))) {
-			continue;
-		}
-		for (isize j = i+1; j < variable_index; j++) {
-			String y = variables[j]->token.string;
-			if (y.len == 0 || str_eq(y, str_lit("_"))) {
-				continue;
-			}
-			if (str_eq(x, y)) {
-				error(variables[j]->token, "Duplicate return value name `%.*s`", LIT(y));
-			}
-		}
-	}
-
-	tuple->Tuple.variables = variables;
-	tuple->Tuple.variable_count = variable_index;
-
-	return tuple;
-}
-
-Type *type_to_abi_compat_param_type(gbAllocator a, Type *original_type) {
-	Type *new_type = original_type;
-
-	if (str_eq(build_context.ODIN_OS, str_lit("windows"))) {
-		// NOTE(bill): Changing the passing parameter value type is to match C's ABI
-		// IMPORTANT TODO(bill): This only matches the ABI on MSVC at the moment
-		// SEE: https://msdn.microsoft.com/en-us/library/zthk2dkh.aspx
-		Type *bt = core_type(original_type);
-		switch (bt->kind) {
-		// Okay to pass by value
-		// Especially the only Odin types
-		case Type_Basic:   break;
-		case Type_Pointer: break;
-		case Type_Proc:    break; // NOTE(bill): Just a pointer
-
-		// Odin only types
-		case Type_Slice:
-		case Type_DynamicArray:
-		case Type_Map:
-			break;
-
-		// Odin specific
-		case Type_Array:
-		case Type_Vector:
-		// Could be in C too
-		case Type_Record: {
-			i64 align = type_align_of(a, original_type);
-			i64 size  = type_size_of(a, original_type);
-			switch (8*size) {
-			case 8:  new_type = t_u8;  break;
-			case 16: new_type = t_u16; break;
-			case 32: new_type = t_u32; break;
-			case 64: new_type = t_u64; break;
-			default:
-				new_type = make_type_pointer(a, original_type);
-				break;
-			}
-		} break;
-		}
-	} else if (str_eq(build_context.ODIN_OS, str_lit("linux"))) {
-		Type *bt = core_type(original_type);
-		switch (bt->kind) {
-		// Okay to pass by value
-		// Especially the only Odin types
-		case Type_Basic:   break;
-		case Type_Pointer: break;
-		case Type_Proc:    break; // NOTE(bill): Just a pointer
-
-		// Odin only types
-		case Type_Slice:
-		case Type_DynamicArray:
-		case Type_Map:
-			break;
-
-		// Odin specific
-		case Type_Array:
-		case Type_Vector:
-		// Could be in C too
-		case Type_Record: {
-			i64 align = type_align_of(a, original_type);
-			i64 size  = type_size_of(a, original_type);
-			if (8*size > 16) {
-				new_type = make_type_pointer(a, original_type);
-			}
-		} break;
-		}
-	} else {
-		// IMPORTANT TODO(bill): figure out the ABI settings for Linux, OSX etc. for
-		// their architectures
-	}
-
-	return new_type;
-}
-
-Type *reduce_tuple_to_single_type(Type *original_type) {
-	if (original_type != NULL) {
-		Type *t = core_type(original_type);
-		if (t->kind == Type_Tuple && t->Tuple.variable_count == 1) {
-			return t->Tuple.variables[0]->type;
-		}
-	}
-	return original_type;
-}
-
-Type *type_to_abi_compat_result_type(gbAllocator a, Type *original_type) {
-	Type *new_type = original_type;
-	if (new_type == NULL) {
-		return NULL;
-	}
-	GB_ASSERT(is_type_tuple(original_type));
-
-
-
-	if (str_eq(build_context.ODIN_OS, str_lit("windows"))) {
-		Type *bt = core_type(reduce_tuple_to_single_type(original_type));
-		// NOTE(bill): This is just reversed engineered from LLVM IR output
-		switch (bt->kind) {
-		// Okay to pass by value
-		// Especially the only Odin types
-		case Type_Pointer: break;
-		case Type_Proc:    break; // NOTE(bill): Just a pointer
-		case Type_Basic:   break;
-
-
-		default: {
-			i64 align = type_align_of(a, original_type);
-			i64 size  = type_size_of(a, original_type);
-			switch (8*size) {
-#if 1
-			case 8:  new_type = t_u8;  break;
-			case 16: new_type = t_u16; break;
-			case 32: new_type = t_u32; break;
-			case 64: new_type = t_u64; break;
-#endif
-			}
-		} break;
-		}
-	} else if (str_eq(build_context.ODIN_OS, str_lit("linux"))) {
-
-	} else {
-		// IMPORTANT TODO(bill): figure out the ABI settings for Linux, OSX etc. for
-		// their architectures
-	}
-
-	if (new_type != original_type) {
-		Type *tuple = make_type_tuple(a);
-		tuple->Tuple.variable_count = 1;
-		tuple->Tuple.variables = gb_alloc_array(a, Entity *, 1);
-		tuple->Tuple.variables[0] = make_entity_param(a, original_type->Tuple.variables[0]->scope, empty_token, new_type, false, false);
-		new_type = tuple;
-	}
-
-
-	// return reduce_tuple_to_single_type(new_type);
-	return new_type;
-}
-
-bool abi_compat_return_by_value(gbAllocator a, ProcCallingConvention cc, Type *abi_return_type) {
-	if (abi_return_type == NULL) {
-		return false;
-	}
-	if (cc == ProcCC_Odin) {
-		return false;
-	}
-
-
-	if (str_eq(build_context.ODIN_OS, str_lit("windows"))) {
-		i64 size = 8*type_size_of(a, abi_return_type);
-		switch (size) {
-		case 0:
-		case 8:
-		case 16:
-		case 32:
-		case 64:
-			return false;
-		default:
-			return true;
-		}
-	}
-	return false;
-}
-
-void check_procedure_type(Checker *c, Type *type, AstNode *proc_type_node) {
-	ast_node(pt, ProcType, proc_type_node);
-
-	bool variadic = false;
-	Type *params  = check_get_params(c, c->context.scope, pt->params, &variadic);
-	Type *results = check_get_results(c, c->context.scope, pt->results);
-
-	isize param_count = 0;
-	isize result_count = 0;
-	if (params)  param_count  = params ->Tuple.variable_count;
-	if (results) result_count = results->Tuple.variable_count;
-
-	type->Proc.scope              = c->context.scope;
-	type->Proc.params             = params;
-	type->Proc.param_count        = param_count;
-	type->Proc.results            = results;
-	type->Proc.result_count       = result_count;
-	type->Proc.variadic           = variadic;
-	type->Proc.calling_convention = pt->calling_convention;
-
-
-	type->Proc.abi_compat_params = gb_alloc_array(c->allocator, Type *, param_count);
-	for (isize i = 0; i < param_count; i++) {
-		Type *original_type = type->Proc.params->Tuple.variables[i]->type;
-		Type *new_type = type_to_abi_compat_param_type(c->allocator, original_type);
-		type->Proc.abi_compat_params[i] = new_type;
-	}
-
-	// NOTE(bill): The types are the same
-	type->Proc.abi_compat_result_type = type_to_abi_compat_result_type(c->allocator, type->Proc.results);
-	type->Proc.return_by_pointer = abi_compat_return_by_value(c->allocator, pt->calling_convention, type->Proc.abi_compat_result_type);
-}
-
-
-Entity *check_ident(Checker *c, Operand *o, AstNode *n, Type *named_type, Type *type_hint, bool allow_import_name) {
-	GB_ASSERT(n->kind == AstNode_Ident);
-	o->mode = Addressing_Invalid;
-	o->expr = n;
-	String name = n->Ident.string;
-
-	Entity *e = scope_lookup_entity(c->context.scope, name);
-	if (e == NULL) {
-		if (str_eq(name, str_lit("_"))) {
-			error(n->Ident, "`_` cannot be used as a value type");
-		} else {
-			error(n->Ident, "Undeclared name: %.*s", LIT(name));
-		}
-		o->type = t_invalid;
-		o->mode = Addressing_Invalid;
-		if (named_type != NULL) {
-			set_base_type(named_type, t_invalid);
-		}
-		return NULL;
-	}
-	if (e->parent_proc_decl != NULL &&
-	    e->parent_proc_decl != c->context.curr_proc_decl) {
-		if (e->kind == Entity_Variable) {
-			error(n->Ident, "Nested procedures do not capture its parent's variables: %.*s", LIT(name));
-			return NULL;
-		} else if (e->kind == Entity_Label) {
-			error(n->Ident, "Nested procedures do not capture its parent's labels: %.*s", LIT(name));
-			return NULL;
-		}
-	}
-
-	bool is_overloaded = false;
-	isize overload_count = 0;
-	HashKey key = hash_string(name);
-
-	if (e->kind == Entity_Procedure) {
-		// NOTE(bill): Overloads are only allowed with the same scope
-		Scope *s = e->scope;
-		overload_count = map_entity_multi_count(&s->elements, key);
-		if (overload_count > 1) {
-			is_overloaded = true;
-		}
-	}
-
-	if (is_overloaded) {
-		Scope *s = e->scope;
-		bool skip = false;
-
-		Entity **procs = gb_alloc_array(heap_allocator(), Entity *, overload_count);
-		map_entity_multi_get_all(&s->elements, key, procs);
-		if (type_hint != NULL) {
-			gbTempArenaMemory tmp = gb_temp_arena_memory_begin(&c->tmp_arena);
-			// NOTE(bill): These should be done
-			for (isize i = 0; i < overload_count; i++) {
-				Type *t = base_type(procs[i]->type);
-				if (t == t_invalid) {
-					continue;
-				}
-				Operand x = {0};
-				x.mode = Addressing_Value;
-				x.type = t;
-				if (check_is_assignable_to(c, &x, type_hint)) {
-					e = procs[i];
-					add_entity_use(c, n, e);
-					skip = true;
-					break;
-				}
-			}
-			gb_temp_arena_memory_end(tmp);
-
-		}
-
-		if (!skip) {
-			o->mode              = Addressing_Overload;
-			o->type              = t_invalid;
-			o->overload_count    = overload_count;
-			o->overload_entities = procs;
-			return NULL;
-		}
-		gb_free(heap_allocator(), procs);
-	}
-
-	add_entity_use(c, n, e);
-	check_entity_decl(c, e, NULL, named_type);
-
-
-	if (e->type == NULL) {
-		compiler_error("How did this happen? type: %s; identifier: %.*s\n", type_to_string(e->type), LIT(name));
-		// return NULL;
-	}
-
-	e->flags |= EntityFlag_Used;
-
-	Type *type = e->type;
-	switch (e->kind) {
-	case Entity_Constant:
-		if (type == t_invalid) {
-			o->type = t_invalid;
-			return e;
-		}
-		o->value = e->Constant.value;
-		if (o->value.kind == ExactValue_Invalid) {
-			return e;
-		}
-		o->mode = Addressing_Constant;
-		break;
-
-	case Entity_Variable:
-		e->flags |= EntityFlag_Used;
-		if (type == t_invalid) {
-			o->type = t_invalid;
-			return e;
-		}
-		o->mode = Addressing_Variable;
-		if (e->flags & EntityFlag_Value) {
-			o->mode = Addressing_Value;
-		}
-		if (e->Variable.is_immutable) {
-			o->mode = Addressing_Immutable;
-		}
-		break;
-
-	case Entity_TypeAlias:
-	case Entity_TypeName:
-		o->mode = Addressing_Type;
-		break;
-
-	case Entity_Procedure:
-		o->mode = Addressing_Value;
-		break;
-
-	case Entity_Builtin:
-		o->builtin_id = e->Builtin.id;
-		o->mode = Addressing_Builtin;
-		break;
-
-	case Entity_ImportName:
-		if (!allow_import_name) {
-			error_node(n, "Use of import `%.*s` not in selector", LIT(name));
-		}
-		return e;
-	case Entity_LibraryName:
-		error_node(n, "Use of library `%.*s` not in #foreign tag", LIT(name));
-		return e;
-
-	case Entity_Label:
-		o->mode = Addressing_NoValue;
-		break;
-
-	case Entity_Nil:
-		o->mode = Addressing_Value;
-		break;
-
-	default:
-		compiler_error("Unknown EntityKind");
-		break;
-	}
-
-	o->type = type;
-	return e;
-}
-
-i64 check_array_or_map_count(Checker *c, AstNode *e, bool is_map) {
-	if (e == NULL) {
-		return 0;
-	}
-	Operand o = {0};
-	if (e->kind == AstNode_UnaryExpr &&
-	    e->UnaryExpr.op.kind == Token_Ellipsis) {
-		return -1;
-	}
-
-	check_expr(c, &o, e);
-	if (o.mode != Addressing_Constant) {
-		if (o.mode != Addressing_Invalid) {
-			if (is_map) {
-				error_node(e, "Fixed map count must be a constant");
-			} else {
-				error_node(e, "Array count must be a constant");
-			}
-		}
-		return 0;
-	}
-	Type *type = base_type(o.type);
-	if (is_type_untyped(type) || is_type_integer(type)) {
-		if (o.value.kind == ExactValue_Integer) {
-			i64 count = i128_to_i64(o.value.value_integer);
-			if (is_map) {
-				if (count > 0) {
-					return count;
-				}
-				error_node(e, "Invalid fixed map count");
-			} else {
-				if (count >= 0) {
-					return count;
-				}
-				error_node(e, "Invalid array count");
-			}
-			return 0;
-		}
-	}
-
-	if (is_map) {
-		error_node(e, "Fixed map count must be an integer");
-	} else {
-		error_node(e, "Array count must be an integer");
-	}
-	return 0;
-}
-
-Type *make_optional_ok_type(gbAllocator a, Type *value) {
-	bool typed = true;
-	Type *t = make_type_tuple(a);
-	t->Tuple.variables = gb_alloc_array(a, Entity *, 2);
-	t->Tuple.variable_count = 2;
-	t->Tuple.variables[0] = make_entity_field(a, NULL, blank_token, value,  false, 0);
-	t->Tuple.variables[1] = make_entity_field(a, NULL, blank_token, typed ? t_bool : t_untyped_bool, false, 1);
-	return t;
-}
-
-void check_map_type(Checker *c, Type *type, AstNode *node) {
-	GB_ASSERT(type->kind == Type_Map);
-	ast_node(mt, MapType, node);
-
-	i64 count   = check_array_or_map_count(c, mt->count, true);
-	Type *key   = check_type_extra(c, mt->key, NULL);
-	Type *value = check_type_extra(c, mt->value, NULL);
-
-	if (!is_type_valid_for_keys(key)) {
-		if (is_type_boolean(key)) {
-			error_node(node, "A boolean cannot be used as a key for a map");
-		} else {
-			gbString str = type_to_string(key);
-			error_node(node, "Invalid type of a key for a map, got `%s`", str);
-			gb_string_free(str);
-		}
-	}
-
-	if (count > 0) {
-		count = 0;
-		error_node(node, "Fixed map types are not yet implemented");
-	}
-
-	type->Map.count = count;
-	type->Map.key   = key;
-	type->Map.value = value;
-
-	gbAllocator a = c->allocator;
-
-	{
-		// NOTE(bill): The preload types may have not been set yet
-		if (t_map_key == NULL) {
-			init_preload(c);
-		}
-		GB_ASSERT(t_map_key != NULL);
-
-		Type *entry_type = make_type_struct(a);
-
-		/*
-		struct {
-			hash:  Map_Key,
-			next:  int,
-			key:   Key_Type,
-			value: Value_Type,
-		}
-		*/
-		AstNode *dummy_node = gb_alloc_item(a, AstNode);
-		dummy_node->kind = AstNode_Invalid;
-		check_open_scope(c, dummy_node);
-
-		isize field_count = 3;
-		Entity **fields = gb_alloc_array(a, Entity *, field_count);
-		fields[0] = make_entity_field(a, c->context.scope, make_token_ident(str_lit("key")),   t_map_key, false, 0);
-		fields[1] = make_entity_field(a, c->context.scope, make_token_ident(str_lit("next")),  t_int,     false, 1);
-		fields[2] = make_entity_field(a, c->context.scope, make_token_ident(str_lit("value")), value,     false, 2);
-
-		check_close_scope(c);
-
-		entry_type->Record.fields              = fields;
-		entry_type->Record.fields_in_src_order = fields;
-		entry_type->Record.field_count         = field_count;
-
-		type_set_offsets(a, entry_type);
-		type->Map.entry_type = entry_type;
-	}
-
-	{
-		Type *generated_struct_type = make_type_struct(a);
-
-		/*
-		struct {
-			hashes:  [dynamic]int,
-			entries; [dynamic]Entry_Type,
-		}
-		*/
-		AstNode *dummy_node = gb_alloc_item(a, AstNode);
-		dummy_node->kind = AstNode_Invalid;
-		check_open_scope(c, dummy_node);
-
-		Type *hashes_type  = make_type_dynamic_array(a, t_int);
-		Type *entries_type = make_type_dynamic_array(a, type->Map.entry_type);
-
-		isize field_count = 2;
-		Entity **fields = gb_alloc_array(a, Entity *, field_count);
-		fields[0] = make_entity_field(a, c->context.scope, make_token_ident(str_lit("hashes")),  hashes_type,  false, 0);
-		fields[1] = make_entity_field(a, c->context.scope, make_token_ident(str_lit("entries")), entries_type, false, 1);
-
-		check_close_scope(c);
-
-		generated_struct_type->Record.fields              = fields;
-		generated_struct_type->Record.fields_in_src_order = fields;
-		generated_struct_type->Record.field_count         = field_count;
-
-		type_set_offsets(a, generated_struct_type);
-		type->Map.generated_struct_type = generated_struct_type;
-	}
-
-	type->Map.lookup_result_type = make_optional_ok_type(a, value);
-
-	// error_node(node, "`map` types are not yet implemented");
-}
-
-bool check_type_extra_internal(Checker *c, AstNode *e, Type **type, Type *named_type) {
-	GB_ASSERT_NOT_NULL(type);
-	if (e == NULL) {
-		*type = t_invalid;
-		return true;
-	}
-
-	switch (e->kind) {
-	case_ast_node(i, Ident, e);
-		Operand o = {0};
-		check_ident(c, &o, e, named_type, NULL, false);
-
-		switch (o.mode) {
-		case Addressing_Invalid:
-			break;
-		case Addressing_Type: {
-			*type = o.type;
-			return true;
-		} break;
-		case Addressing_NoValue: {
-			gbString err_str = expr_to_string(e);
-			error_node(e, "`%s` used as a type", err_str);
-			gb_string_free(err_str);
-		} break;
-		default: {
-			gbString err_str = expr_to_string(e);
-			error_node(e, "`%s` used as a type when not a type", err_str);
-			gb_string_free(err_str);
-		} break;
-		}
-	case_end;
-
-	case_ast_node(se, SelectorExpr, e);
-		Operand o = {0};
-		check_selector(c, &o, e, NULL);
-
-		switch (o.mode) {
-		case Addressing_Invalid:
-			break;
-		case Addressing_Type:
-			GB_ASSERT(o.type != NULL);
-			*type = o.type;
-			return true;
-		case Addressing_NoValue: {
-			gbString err_str = expr_to_string(e);
-			error_node(e, "`%s` used as a type", err_str);
-			gb_string_free(err_str);
-		} break;
-		default: {
-			gbString err_str = expr_to_string(e);
-			error_node(e, "`%s` is not a type", err_str);
-			gb_string_free(err_str);
-		} break;
-		}
-	case_end;
-
-	case_ast_node(pe, ParenExpr, e);
-		*type = check_type_extra(c, pe->expr, named_type);
-		return true;
-	case_end;
-
-	case_ast_node(ue, UnaryExpr, e);
-		if (ue->op.kind == Token_Pointer) {
-			*type = make_type_pointer(c->allocator, check_type(c, ue->expr));
-			return true;
-		} /* else if (ue->op.kind == Token_Maybe) {
-			*type = make_type_maybe(c->allocator, check_type(c, ue->expr));
-			return true;
-		} */
-	case_end;
-
-	case_ast_node(ht, HelperType, e);
-		*type = check_type(c, ht->type);
-		return true;
-	case_end;
-
-	case_ast_node(pt, PointerType, e);
-		Type *elem = check_type(c, pt->type);
-		i64 esz = type_size_of(c->allocator, elem);
-		*type = make_type_pointer(c->allocator, elem);
-		return true;
-	case_end;
-
-	case_ast_node(at, AtomicType, e);
-		Type *elem = check_type(c, at->type);
-		i64 esz = type_size_of(c->allocator, elem);
-		*type = make_type_atomic(c->allocator, elem);
-		return true;
-	case_end;
-
-	case_ast_node(at, ArrayType, e);
-		if (at->count != NULL) {
-			Type *elem = check_type_extra(c, at->elem, NULL);
-			i64 count = check_array_or_map_count(c, at->count, false);
-			if (count < 0) {
-				error_node(at->count, ".. can only be used in conjuction with compound literals");
-				count = 0;
-			}
-#if 0
-			i64 esz = type_size_of(c->allocator, elem);
-			if (esz == 0) {
-				gbString str = type_to_string(elem);
-				error_node(at->elem, "Zero sized element type `%s` is not allowed", str);
-				gb_string_free(str);
-			}
-#endif
-			*type = make_type_array(c->allocator, elem, count);
-		} else {
-			Type *elem = check_type(c, at->elem);
-#if 0
-			i64 esz = type_size_of(c->allocator, elem);
-			if (esz == 0) {
-				gbString str = type_to_string(elem);
-				error_node(at->elem, "Zero sized element type `%s` is not allowed", str);
-				gb_string_free(str);
-			}
-#endif
-			*type = make_type_slice(c->allocator, elem);
-		}
-		return true;
-	case_end;
-
-	case_ast_node(dat, DynamicArrayType, e);
-		Type *elem = check_type_extra(c, dat->elem, NULL);
-		i64 esz = type_size_of(c->allocator, elem);
-#if 0
-		if (esz == 0) {
-			gbString str = type_to_string(elem);
-			error_node(dat->elem, "Zero sized element type `%s` is not allowed", str);
-			gb_string_free(str);
-		}
-#endif
-		*type = make_type_dynamic_array(c->allocator, elem);
-		return true;
-	case_end;
-
-
-
-	case_ast_node(vt, VectorType, e);
-		Type *elem = check_type(c, vt->elem);
-		Type *be = base_type(elem);
-		i64 count = check_array_or_map_count(c, vt->count, false);
-		if (is_type_vector(be) || (!is_type_boolean(be) && !is_type_numeric(be))) {
-			gbString err_str = type_to_string(elem);
-			error_node(vt->elem, "Vector element type must be numerical or a boolean, got `%s`", err_str);
-			gb_string_free(err_str);
-		}
-		*type = make_type_vector(c->allocator, elem, count);
-		return true;
-	case_end;
-
-	case_ast_node(st, StructType, e);
-		*type = make_type_struct(c->allocator);
-		set_base_type(named_type, *type);
-		check_open_scope(c, e);
-		check_struct_type(c, *type, e);
-		check_close_scope(c);
-		(*type)->Record.node = e;
-		return true;
-	case_end;
-
-	case_ast_node(ut, UnionType, e);
-		*type = make_type_union(c->allocator);
-		set_base_type(named_type, *type);
-		check_open_scope(c, e);
-		check_union_type(c, *type, e);
-		check_close_scope(c);
-		(*type)->Record.node = e;
-		return true;
-	case_end;
-
-	case_ast_node(rut, RawUnionType, e);
-		*type = make_type_raw_union(c->allocator);
-		set_base_type(named_type, *type);
-		check_open_scope(c, e);
-		check_raw_union_type(c, *type, e);
-		check_close_scope(c);
-		(*type)->Record.node = e;
-		return true;
-	case_end;
-
-	case_ast_node(et, EnumType, e);
-		*type = make_type_enum(c->allocator);
-		set_base_type(named_type, *type);
-		check_open_scope(c, e);
-		check_enum_type(c, *type, named_type, e);
-		check_close_scope(c);
-		(*type)->Record.node = e;
-		return true;
-	case_end;
-
-	case_ast_node(et, BitFieldType, e);
-		*type = make_type_bit_field(c->allocator);
-		set_base_type(named_type, *type);
-		check_open_scope(c, e);
-		check_bit_field_type(c, *type, named_type, e);
-		check_close_scope(c);
-		return true;
-	case_end;
-
-	case_ast_node(pt, ProcType, e);
-		*type = alloc_type(c->allocator, Type_Proc);
-		set_base_type(named_type, *type);
-		check_open_scope(c, e);
-		check_procedure_type(c, *type, e);
-		check_close_scope(c);
-		return true;
-	case_end;
-
-	case_ast_node(mt, MapType, e);
-		*type = alloc_type(c->allocator, Type_Map);
-		set_base_type(named_type, *type);
-		check_map_type(c, *type, e);
-		return true;
-	case_end;
-
-	case_ast_node(ce, CallExpr, e);
-		Operand o = {0};
-		check_expr_or_type(c, &o, e);
-		if (o.mode == Addressing_Type) {
-			*type = o.type;
-			return true;
-		}
-	case_end;
-	}
-
-	*type = t_invalid;
-	return false;
-}
-
-
-
-Type *check_type_extra(Checker *c, AstNode *e, Type *named_type) {
-	Type *type = NULL;
-	bool ok = check_type_extra_internal(c, e, &type, named_type);
-
-	if (!ok) {
-		gbString err_str = expr_to_string(e);
-		error_node(e, "`%s` is not a type", err_str);
-		gb_string_free(err_str);
-		type = t_invalid;
-	}
-
-	if (type == NULL) {
-		type = t_invalid;
-	}
-
-	if (type->kind == Type_Named) {
-		if (type->Named.base == NULL) {
-			gbString name = type_to_string(type);
-			error_node(e, "Invalid type definition of %s", name);
-			gb_string_free(name);
-			type->Named.base = t_invalid;
-		}
-	}
-
-	if (is_type_typed(type)) {
-		add_type_and_value(&c->info, e, Addressing_Type, type, (ExactValue){0});
-	} else {
-		gbString name = type_to_string(type);
-		error_node(e, "Invalid type definition of %s", name);
-		gb_string_free(name);
-		type = t_invalid;
-	}
-	set_base_type(named_type, type);
-
-	return type;
-}
-
-
-bool check_unary_op(Checker *c, Operand *o, Token op) {
-	if (o->type == NULL) {
-		gbString str = expr_to_string(o->expr);
-		error_node(o->expr, "Expression has no value `%s`", str);
-		gb_string_free(str);
-		return false;
-	}
-	// TODO(bill): Handle errors correctly
-	Type *type = base_type(base_vector_type(o->type));
-	gbString str = NULL;
-	switch (op.kind) {
-	case Token_Add:
-	case Token_Sub:
-		if (!is_type_numeric(type)) {
-			str = expr_to_string(o->expr);
-			error(op, "Operator `%.*s` is not allowed with `%s`", LIT(op.string), str);
-			gb_string_free(str);
-		}
-		break;
-
-	case Token_Xor:
-		if (!is_type_integer(type) && !is_type_boolean(type)) {
-			error(op, "Operator `%.*s` is only allowed with integers or booleans", LIT(op.string));
-		}
-		break;
-
-	case Token_Not:
-		if (!is_type_boolean(type)) {
-			str = expr_to_string(o->expr);
-			error(op, "Operator `%.*s` is only allowed on boolean expression", LIT(op.string));
-			gb_string_free(str);
-		}
-		break;
-
-	default:
-		error(op, "Unknown operator `%.*s`", LIT(op.string));
-		return false;
-	}
-
-	return true;
-}
-
-bool check_binary_op(Checker *c, Operand *o, Token op) {
-	// TODO(bill): Handle errors correctly
-	Type *type = base_type(base_vector_type(o->type));
-	switch (op.kind) {
-	case Token_Sub:
-	case Token_SubEq:
-		if (!is_type_numeric(type) && !is_type_pointer(type)) {
-			error(op, "Operator `%.*s` is only allowed with numeric or pointer expressions", LIT(op.string));
-			return false;
-		}
-		if (is_type_pointer(type)) {
-			o->type = t_int;
-		}
-		if (base_type(type) == t_rawptr) {
-			gbString str = type_to_string(type);
-			error_node(o->expr, "Invalid pointer type for pointer arithmetic: `%s`", str);
-			gb_string_free(str);
-			return false;
-		}
-		break;
-
-	case Token_Add:
-	case Token_Mul:
-	case Token_Quo:
-	case Token_AddEq:
-	case Token_MulEq:
-	case Token_QuoEq:
-		if (!is_type_numeric(type)) {
-			error(op, "Operator `%.*s` is only allowed with numeric expressions", LIT(op.string));
-			return false;
-		}
-		break;
-
-	case Token_And:
-	case Token_Or:
-	case Token_AndEq:
-	case Token_OrEq:
-	case Token_Xor:
-	case Token_XorEq:
-		if (!is_type_integer(type) && !is_type_boolean(type)) {
-			error(op, "Operator `%.*s` is only allowed with integers or booleans", LIT(op.string));
-			return false;
-		}
-		break;
-
-	case Token_Mod:
-	case Token_ModMod:
-	case Token_AndNot:
-	case Token_ModEq:
-	case Token_ModModEq:
-	case Token_AndNotEq:
-		if (!is_type_integer(type)) {
-			error(op, "Operator `%.*s` is only allowed with integers", LIT(op.string));
-			return false;
-		}
-		break;
-
-	case Token_CmpAnd:
-	case Token_CmpOr:
-	case Token_CmpAndEq:
-	case Token_CmpOrEq:
-		if (!is_type_boolean(type)) {
-			error(op, "Operator `%.*s` is only allowed with boolean expressions", LIT(op.string));
-			return false;
-		}
-		break;
-
-	default:
-		error(op, "Unknown operator `%.*s`", LIT(op.string));
-		return false;
-	}
-
-	return true;
-
-}
-
-bool check_representable_as_constant(Checker *c, ExactValue in_value, Type *type, ExactValue *out_value) {
-	if (in_value.kind == ExactValue_Invalid) {
-		// NOTE(bill): There's already been an error
-		return true;
-	}
-
-	type = core_type(type);
-
-	if (is_type_boolean(type)) {
-		return in_value.kind == ExactValue_Bool;
-	} else if (is_type_string(type)) {
-		return in_value.kind == ExactValue_String;
-	} else if (is_type_integer(type) || is_type_rune(type)) {
-		ExactValue v = exact_value_to_integer(in_value);
-		if (v.kind != ExactValue_Integer) {
-			return false;
-		}
-		if (out_value) *out_value = v;
-
-
-		if (is_type_untyped(type)) {
-			return true;
-		}
-
-		i128 i = v.value_integer;
-		u128 u = *cast(u128 *)&i;
-		i64 s = 8*type_size_of(c->allocator, type);
-		u128 umax = U128_NEG_ONE;
-		if (s < 128) {
-			umax = u128_sub(u128_shl(U128_ONE, s), U128_ONE);
-		} else {
-			// IMPORTANT TODO(bill): I NEED A PROPER BIG NUMBER LIBRARY THAT CAN SUPPORT 128 bit floats
-			s = 128;
-		}
-		i128 imax = i128_shl(I128_ONE, s-1ll);
-
-		switch (type->Basic.kind) {
-		case Basic_rune:
-		case Basic_i8:
-		case Basic_i16:
-		case Basic_i32:
-		case Basic_i64:
-		case Basic_i128:
-		case Basic_int:
-			return i128_le(i128_neg(imax), i) && i128_le(i, i128_sub(imax, I128_ONE));
-
-		case Basic_u8:
-		case Basic_u16:
-		case Basic_u32:
-		case Basic_u64:
-		case Basic_u128:
-		case Basic_uint:
-			return !(u128_lt(u, U128_ZERO) || u128_gt(u, umax));
-
-		case Basic_UntypedInteger:
-			return true;
-
-		default: GB_PANIC("Compiler error: Unknown integer type!"); break;
-		}
-	} else if (is_type_float(type)) {
-		ExactValue v = exact_value_to_float(in_value);
-		if (v.kind != ExactValue_Float) {
-			return false;
-		}
-		if (out_value) *out_value = v;
-
-
-		switch (type->Basic.kind) {
-		// case Basic_f16:
-		case Basic_f32:
-		case Basic_f64:
-			return true;
-
-		case Basic_UntypedFloat:
-			return true;
-		}
-	} else if (is_type_complex(type)) {
-		ExactValue v = exact_value_to_complex(in_value);
-		if (v.kind != ExactValue_Complex) {
-			return false;
-		}
-
-		switch (type->Basic.kind) {
-		case Basic_complex64:
-		case Basic_complex128: {
-			ExactValue real = exact_value_real(v);
-			ExactValue imag = exact_value_imag(v);
-			if (real.kind != ExactValue_Invalid &&
-			    imag.kind != ExactValue_Invalid) {
-				if (out_value) *out_value = exact_binary_operator_value(Token_Add, real, exact_value_make_imag(imag));
-				return true;
-			}
-		} break;
-		case Basic_UntypedComplex:
-			return true;
-		}
-
-		return false;
-	}else if (is_type_pointer(type)) {
-		if (in_value.kind == ExactValue_Pointer) {
-			return true;
-		}
-		if (in_value.kind == ExactValue_Integer) {
-			return false;
-			// return true;
-		}
-		if (out_value) *out_value = in_value;
-	}
-
-
-	return false;
-}
-
-void check_is_expressible(Checker *c, Operand *o, Type *type) {
-	GB_ASSERT(is_type_constant_type(type));
-	GB_ASSERT(o->mode == Addressing_Constant);
-	if (!check_representable_as_constant(c, o->value, type, &o->value)) {
-		gbString a = expr_to_string(o->expr);
-		gbString b = type_to_string(type);
-		if (is_type_numeric(o->type) && is_type_numeric(type)) {
-			if (!is_type_integer(o->type) && is_type_integer(type)) {
-				error_node(o->expr, "`%s` truncated to `%s`", a, b);
-			} else {
-				char buf[127] = {0};
-				String str = {0};
-				i128 i = o->value.value_integer;
-				if (is_type_unsigned(o->type)) {
-					str = u128_to_string(*cast(u128 *)&i, buf, gb_size_of(buf));
-				} else {
-					str = i128_to_string(i, buf, gb_size_of(buf));
-				}
-				error_node(o->expr, "`%s = %.*s` overflows `%s`", a, str, b);
-			}
-		} else {
-			error_node(o->expr, "Cannot convert `%s` to `%s`", a, b);
-		}
-
-		gb_string_free(b);
-		gb_string_free(a);
-		o->mode = Addressing_Invalid;
-	}
-}
-
-bool check_is_expr_vector_index(Checker *c, AstNode *expr) {
-	// HACK(bill): Handle this correctly. Maybe with a custom AddressingMode
-	expr = unparen_expr(expr);
-	if (expr->kind == AstNode_IndexExpr) {
-		ast_node(ie, IndexExpr, expr);
-		Type *t = type_deref(type_of_expr(&c->info, ie->expr));
-		if (t != NULL) {
-			return is_type_vector(t);
-		}
-	}
-	return false;
-}
-
-bool check_is_vector_elem(Checker *c, AstNode *expr) {
-	// HACK(bill): Handle this correctly. Maybe with a custom AddressingMode
-	expr = unparen_expr(expr);
-	if (expr->kind == AstNode_SelectorExpr) {
-		ast_node(se, SelectorExpr, expr);
-		Type *t = type_deref(type_of_expr(&c->info, se->expr));
-		if (t != NULL && is_type_vector(t)) {
-			return true;
-		}
-	}
-	return false;
-}
-
-bool check_is_not_addressable(Checker *c, Operand *o) {
-	if (o->mode != Addressing_Variable) {
-		return true;
-	}
-	if (is_type_bit_field_value(o->type)) {
-		return true;
-	}
-	if (check_is_expr_vector_index(c, o->expr)) {
-		return true;
-	}
-	if (check_is_vector_elem(c, o->expr)) {
-		return true;
-	}
-
-	return false;
-}
-
-void check_unary_expr(Checker *c, Operand *o, Token op, AstNode *node) {
-	switch (op.kind) {
-	case Token_And: { // Pointer address
-		if (o->mode == Addressing_Type) {
-			o->type = make_type_pointer(c->allocator, o->type);
-			return;
-		}
-		if (check_is_not_addressable(c, o)) {
-			if (ast_node_expect(node, AstNode_UnaryExpr)) {
-				ast_node(ue, UnaryExpr, node);
-				gbString str = expr_to_string(ue->expr);
-				error(op, "Cannot take the pointer address of `%s`", str);
-				gb_string_free(str);
-			}
-			o->mode = Addressing_Invalid;
-			return;
-		}
-		o->mode = Addressing_Value;
-		o->type = make_type_pointer(c->allocator, o->type);
-		return;
-	}
-	}
-
-	if (!check_unary_op(c, o, op)) {
-		o->mode = Addressing_Invalid;
-		return;
-	}
-
-	if (o->mode == Addressing_Constant && !is_type_vector(o->type)) {
-		Type *type = base_type(o->type);
-		if (!is_type_constant_type(o->type)) {
-			gbString xt = type_to_string(o->type);
-			gbString err_str = expr_to_string(node);
-			error(op, "Invalid type, `%s`, for constant unary expression `%s`", xt, err_str);
-			gb_string_free(err_str);
-			gb_string_free(xt);
-			o->mode = Addressing_Invalid;
-			return;
-		}
-
-
-		i32 precision = 0;
-		if (is_type_unsigned(type)) {
-			precision = cast(i32)(8 * type_size_of(c->allocator, type));
-		}
-		o->value = exact_unary_operator_value(op.kind, o->value, precision);
-
-		if (is_type_typed(type)) {
-			if (node != NULL) {
-				o->expr = node;
-			}
-			check_is_expressible(c, o, type);
-		}
-		return;
-	}
-
-	o->mode = Addressing_Value;
-}
-
-void check_comparison(Checker *c, Operand *x, Operand *y, TokenKind op) {
-	if (x->mode == Addressing_Type && y->mode == Addressing_Type) {
-		bool comp = are_types_identical(x->type, y->type);
-		switch (op) {
-		case Token_CmpEq: comp = comp;  break;
-		case Token_NotEq: comp = !comp; break;
-		}
-		x->mode  = Addressing_Constant;
-		x->type  = t_untyped_bool;
-		x->value = exact_value_bool(comp);
-		return;
-	}
-
-	gbString err_str = NULL;
-	gbTempArenaMemory tmp = gb_temp_arena_memory_begin(&c->tmp_arena);
-	if (check_is_assignable_to(c, x, y->type) ||
-	    check_is_assignable_to(c, y, x->type)) {
-		Type *err_type = x->type;
-		bool defined = false;
-		switch (op) {
-		case Token_CmpEq:
-		case Token_NotEq:
-			defined = is_type_comparable(x->type) ||
-			          (is_operand_nil(*x) && type_has_nil(y->type)) ||
-			          (is_operand_nil(*y) && type_has_nil(x->type));
-			break;
-		case Token_Lt:
-		case Token_Gt:
-		case Token_LtEq:
-		case Token_GtEq: {
-			defined = is_type_ordered(x->type);
-		} break;
-		}
-
-		if (!defined) {
-			if (x->type == err_type && is_operand_nil(*x)) {
-				err_type = y->type;
-			}
-			gb_printf_err("%d %d\n", is_operand_nil(*x), type_has_nil(y->type));
-			gb_printf_err("%d %d\n", is_operand_nil(*y), type_has_nil(x->type));
-			gbString type_string = type_to_string(err_type);
-			err_str = gb_string_make(c->tmp_allocator,
-			                         gb_bprintf("operator `%.*s` not defined for type `%s`", LIT(token_strings[op]), type_string));
-			gb_string_free(type_string);
-		}
-	} else {
-		gbString xt = type_to_string(x->type);
-		gbString yt = type_to_string(y->type);
-		err_str = gb_string_make(c->tmp_allocator,
-		                         gb_bprintf("mismatched types `%s` and `%s`", xt, yt));
-		gb_string_free(yt);
-		gb_string_free(xt);
-	}
-
-	if (err_str != NULL) {
-		error_node(x->expr, "Cannot compare expression, %s", err_str);
-		x->type = t_untyped_bool;
-	} else {
-		if (x->mode == Addressing_Constant &&
-		    y->mode == Addressing_Constant) {
-			x->value = exact_value_bool(compare_exact_values(op, x->value, y->value));
-		} else {
-			x->mode = Addressing_Value;
-
-
-			update_expr_type(c, x->expr, default_type(x->type), true);
-			update_expr_type(c, y->expr, default_type(y->type), true);
-		}
-
-		if (is_type_vector(base_type(y->type))) {
-			x->type = make_type_vector(c->allocator, t_bool, base_type(y->type)->Vector.count);
-		} else {
-			x->type = t_untyped_bool;
-		}
-	}
-
-	if (err_str != NULL) {
-		gb_string_free(err_str);
-	}
-	gb_temp_arena_memory_end(tmp);
-}
-
-void check_shift(Checker *c, Operand *x, Operand *y, AstNode *node) {
-	GB_ASSERT(node->kind == AstNode_BinaryExpr);
-	ast_node(be, BinaryExpr, node);
-
-	ExactValue x_val = {0};
-	if (x->mode == Addressing_Constant) {
-		x_val = exact_value_to_integer(x->value);
-	}
-
-	bool x_is_untyped = is_type_untyped(x->type);
-	if (!(is_type_integer(x->type) || (x_is_untyped && x_val.kind == ExactValue_Integer))) {
-		gbString err_str = expr_to_string(x->expr);
-		error_node(node, "Shifted operand `%s` must be an integer", err_str);
-		gb_string_free(err_str);
-		x->mode = Addressing_Invalid;
-		return;
-	}
-
-	if (is_type_unsigned(y->type)) {
-
-	} else if (is_type_untyped(y->type)) {
-		convert_to_typed(c, y, t_untyped_integer, 0);
-		if (y->mode == Addressing_Invalid) {
-			x->mode = Addressing_Invalid;
-			return;
-		}
-	} else {
-		gbString err_str = expr_to_string(y->expr);
-		error_node(node, "Shift amount `%s` must be an unsigned integer", err_str);
-		gb_string_free(err_str);
-		x->mode = Addressing_Invalid;
-		return;
-	}
-
-
-	if (x->mode == Addressing_Constant) {
-		if (y->mode == Addressing_Constant) {
-			ExactValue y_val = exact_value_to_integer(y->value);
-			if (y_val.kind != ExactValue_Integer) {
-				gbString err_str = expr_to_string(y->expr);
-				error_node(node, "Shift amount `%s` must be an unsigned integer", err_str);
-				gb_string_free(err_str);
-				x->mode = Addressing_Invalid;
-				return;
-			}
-
-			i64 amount = i128_to_i64(y_val.value_integer);
-			if (amount > 128) {
-				gbString err_str = expr_to_string(y->expr);
-				error_node(node, "Shift amount too large: `%s`", err_str);
-				gb_string_free(err_str);
-				x->mode = Addressing_Invalid;
-				return;
-			}
-
-			if (!is_type_integer(x->type)) {
-				// NOTE(bill): It could be an untyped float but still representable
-				// as an integer
-				x->type = t_untyped_integer;
-			}
-
-			x->value = exact_value_shift(be->op.kind, x_val, exact_value_i64(amount));
-
-			if (is_type_typed(x->type)) {
-				check_is_expressible(c, x, base_type(x->type));
-			}
-			return;
-		}
-
-		TokenPos pos = ast_node_token(x->expr).pos;
-		if (x_is_untyped) {
-			ExprInfo *info = map_expr_info_get(&c->info.untyped, hash_pointer(x->expr));
-			if (info != NULL) {
-				info->is_lhs = true;
-			}
-			x->mode = Addressing_Value;
-			// x->value = x_val;
-			return;
-		}
-	}
-
-	if (y->mode == Addressing_Constant && i128_lt(y->value.value_integer, I128_ZERO)) {
-		gbString err_str = expr_to_string(y->expr);
-		error_node(node, "Shift amount cannot be negative: `%s`", err_str);
-		gb_string_free(err_str);
-	}
-
-	if (!is_type_integer(x->type)) {
-		gbString err_str = expr_to_string(y->expr);
-		error_node(node, "Shift operand `%s` must be an integer", err_str);
-		gb_string_free(err_str);
-		x->mode = Addressing_Invalid;
-		return;
-	}
-
-	x->mode = Addressing_Value;
-}
-
-
-String check_down_cast_name(Type *dst_, Type *src_) {
-	String result = {0};
-	Type *dst = type_deref(dst_);
-	Type *src = type_deref(src_);
-	Type *dst_s = base_type(dst);
-	GB_ASSERT(is_type_struct(dst_s) || is_type_raw_union(dst_s));
-	for (isize i = 0; i < dst_s->Record.field_count; i++) {
-		Entity *f = dst_s->Record.fields[i];
-		GB_ASSERT(f->kind == Entity_Variable && f->flags & EntityFlag_Field);
-		if (f->flags & EntityFlag_Using) {
-			if (are_types_identical(f->type, src_)) {
-				return f->token.string;
-			}
-			if (are_types_identical(type_deref(f->type), src_)) {
-				return f->token.string;
-			}
-
-			if (!is_type_pointer(f->type)) {
-				result = check_down_cast_name(f->type, src_);
-				if (result.len > 0) {
-					return result;
-				}
-			}
-		}
-	}
-
-	return result;
-}
-
-Operand check_ptr_addition(Checker *c, TokenKind op, Operand *ptr, Operand *offset, AstNode *node) {
-	GB_ASSERT(node->kind == AstNode_BinaryExpr);
-	ast_node(be, BinaryExpr, node);
-	GB_ASSERT(is_type_pointer(ptr->type));
-	GB_ASSERT(is_type_integer(offset->type));
-	GB_ASSERT(op == Token_Add || op == Token_Sub);
-
-	Operand operand = {0};
-	operand.mode = Addressing_Value;
-	operand.type = ptr->type;
-	operand.expr = node;
-
-	if (base_type(ptr->type) == t_rawptr) {
-		gbString str = type_to_string(ptr->type);
-		error_node(node, "Invalid pointer type for pointer arithmetic: `%s`", str);
-		gb_string_free(str);
-		operand.mode = Addressing_Invalid;
-		return operand;
-	}
-
-	Type *base_ptr = base_type(ptr->type); GB_ASSERT(base_ptr->kind == Type_Pointer);
-	Type *elem = base_ptr->Pointer.elem;
-	i64 elem_size = type_size_of(c->allocator, elem);
-
-	if (elem_size <= 0) {
-		gbString str = type_to_string(elem);
-		error_node(node, "Size of pointer's element type `%s` is zero and cannot be used for pointer arithmetic", str);
-		gb_string_free(str);
-		operand.mode = Addressing_Invalid;
-		return operand;
-	}
-
-	if (ptr->mode == Addressing_Constant && offset->mode == Addressing_Constant) {
-		i64 ptr_val = ptr->value.value_pointer;
-		i64 offset_val = i128_to_i64(exact_value_to_integer(offset->value).value_integer);
-		i64 new_ptr_val = ptr_val;
-		if (op == Token_Add) {
-			new_ptr_val += elem_size*offset_val;
-		} else {
-			new_ptr_val -= elem_size*offset_val;
-		}
-		operand.mode = Addressing_Constant;
-		operand.value = exact_value_pointer(new_ptr_val);
-	}
-
-	return operand;
-}
-
-
-
-bool check_is_castable_to(Checker *c, Operand *operand, Type *y) {
-	if (check_is_assignable_to(c, operand, y)) {
-		return true;
-	}
-
-	Type *x = operand->type;
-	Type *src = core_type(x);
-	Type *dst = core_type(y);
-	if (are_types_identical(src, dst)) {
-		return true;
-	}
-
-
-	if (dst->kind == Type_Array && src->kind == Type_Array) {
-		if (are_types_identical(dst->Array.elem, src->Array.elem)) {
-			return dst->Array.count == src->Array.count;
-		}
-	}
-
-	if (dst->kind == Type_Slice && src->kind == Type_Slice) {
-		return are_types_identical(dst->Slice.elem, src->Slice.elem);
-	}
-
-	// Cast between booleans and integers
-	if (is_type_boolean(src) || is_type_integer(src)) {
-		if (is_type_boolean(dst) || is_type_integer(dst)) {
-			return true;
-		}
-	}
-
-	// Cast between numbers
-	if (is_type_integer(src) || is_type_float(src)) {
-		if (is_type_integer(dst) || is_type_float(dst)) {
-			return true;
-		}
-	}
-
-	if (is_type_integer(src) && is_type_rune(dst)) {
-		return true;
-	}
-	if (is_type_rune(src) && is_type_integer(dst)) {
-		return true;
-	}
-
-	if (is_type_complex(src) && is_type_complex(dst)) {
-		return true;
-	}
-
-	if (is_type_bit_field_value(src) && is_type_integer(dst)) {
-		return true;
-	}
-
-	if (is_type_bit_field_value(src) && is_type_boolean(dst)) {
-		return src->BitFieldValue.bits == 1;
-	}
-
-	// Cast between pointers
-	if (is_type_pointer(src) && is_type_pointer(dst)) {
-		Type *s = base_type(type_deref(src));
-		if (is_type_union(s)) {
-			// NOTE(bill): Should the error be here?!
-			// NOTE(bill): This error should suppress the next casting error as it's at the same position
-			gbString xs = type_to_string(x);
-			gbString ys = type_to_string(y);
-			error_node(operand->expr, "Cannot cast from a union pointer `%s` to `%s`, try using `union_cast` or cast to a `rawptr`", xs, ys);
-			gb_string_free(ys);
-			gb_string_free(xs);
-			return false;
-		}
-		return true;
-	}
-
-	// (u)int <-> rawptr
-	if (is_type_int_or_uint(src) && is_type_rawptr(dst)) {
-		return true;
-	}
-	if (is_type_rawptr(src) && is_type_int_or_uint(dst)) {
-		return true;
-	}
-
-	// []byte/[]u8 <-> string
-	if (is_type_u8_slice(src) && is_type_string(dst)) {
-		return true;
-	}
-	if (is_type_string(src) && is_type_u8_slice(dst)) {
-		// if (is_type_typed(src)) {
-			return true;
-		// }
-	}
-
-	// proc <-> proc
-	if (is_type_proc(src) && is_type_proc(dst)) {
-		return true;
-	}
-
-	// proc -> rawptr
-	if (is_type_proc(src) && is_type_rawptr(dst)) {
-		return true;
-	}
-	// rawptr -> proc
-	if (is_type_rawptr(src) && is_type_proc(dst)) {
-		return true;
-	}
-
-	return false;
-}
-
-void check_cast(Checker *c, Operand *x, Type *type) {
-	bool is_const_expr = x->mode == Addressing_Constant;
-	bool can_convert = false;
-
-	Type *bt = base_type(type);
-	if (is_const_expr && is_type_constant_type(bt)) {
-		if (core_type(bt)->kind == Type_Basic) {
-			if (check_representable_as_constant(c, x->value, bt, &x->value)) {
-				can_convert = true;
-			} else if (is_type_pointer(type) && check_is_castable_to(c, x, type)) {
-				can_convert = true;
-			}
-		}
-	} else if (check_is_castable_to(c, x, type)) {
-		if (x->mode != Addressing_Constant) {
-			x->mode = Addressing_Value;
-		} else if (is_type_slice(type) && is_type_string(x->type)) {
-			x->mode = Addressing_Value;
-		} else if (!is_type_vector(x->type) && is_type_vector(type)) {
-			x->mode = Addressing_Value;
-		}
-		can_convert = true;
-	}
-
-	if (!can_convert) {
-		gbString expr_str = expr_to_string(x->expr);
-		gbString to_type  = type_to_string(type);
-		gbString from_type = type_to_string(x->type);
-		error_node(x->expr, "Cannot cast `%s` as `%s` from `%s`", expr_str, to_type, from_type);
-		gb_string_free(from_type);
-		gb_string_free(to_type);
-		gb_string_free(expr_str);
-
-		x->mode = Addressing_Invalid;
-		return;
-	}
-
-	if (is_type_untyped(x->type)) {
-		Type *final_type = type;
-		if (is_const_expr && !is_type_constant_type(type)) {
-			final_type = default_type(x->type);
-		}
-		update_expr_type(c, x->expr, final_type, true);
-	}
-
-	x->type = type;
-}
-
-bool check_binary_vector_expr(Checker *c, Token op, Operand *x, Operand *y) {
-	if (is_type_vector(x->type) && !is_type_vector(y->type)) {
-		if (check_is_assignable_to(c, y, x->type)) {
-			if (check_binary_op(c, x, op)) {
-				return true;
-			}
-		}
-	}
-	return false;
-}
-
-
-void check_binary_expr(Checker *c, Operand *x, AstNode *node) {
-	GB_ASSERT(node->kind == AstNode_BinaryExpr);
-	Operand y_ = {0}, *y = &y_;
-
-	ast_node(be, BinaryExpr, node);
-
-	Token op = be->op;
-	switch (op.kind) {
-	case Token_CmpEq:
-	case Token_NotEq: {
-		// NOTE(bill): Allow comparisons between types
-		check_expr_or_type(c, x, be->left);
-		check_expr_or_type(c, y, be->right);
-		bool xt = x->mode == Addressing_Type;
-		bool yt = y->mode == Addressing_Type;
-		// If only one is a type, this is an error
-		if (xt ^ yt) {
-			GB_ASSERT(xt != yt);
-			if (xt) error_operand_not_expression(x);
-			if (yt) error_operand_not_expression(y);
-		}
-	} break;
-
-	default:
-		check_expr(c, x, be->left);
-		check_expr(c, y, be->right);
-		break;
-	}
-	if (x->mode == Addressing_Invalid) {
-		return;
-	}
-	if (y->mode == Addressing_Invalid) {
-		x->mode = Addressing_Invalid;
-		x->expr = y->expr;
-		return;
-	}
-
-	if (token_is_shift(op.kind)) {
-		check_shift(c, x, y, node);
-		return;
-	}
-
-	if (op.kind == Token_Add || op.kind == Token_Sub) {
-		if (is_type_pointer(x->type) && is_type_integer(y->type)) {
-			*x = check_ptr_addition(c, op.kind, x, y, node);
-			return;
-		} else if (is_type_integer(x->type) && is_type_pointer(y->type)) {
-			if (op.kind == Token_Sub) {
-				gbString lhs = expr_to_string(x->expr);
-				gbString rhs = expr_to_string(y->expr);
-				error_node(node, "Invalid pointer arithmetic, did you mean `%s %.*s %s`?", rhs, LIT(op.string), lhs);
-				gb_string_free(rhs);
-				gb_string_free(lhs);
-				x->mode = Addressing_Invalid;
-				return;
-			}
-			*x = check_ptr_addition(c, op.kind, y, x, node);
-			return;
-		}
-	}
-
-
-	convert_to_typed(c, x, y->type, 0);
-	if (x->mode == Addressing_Invalid) {
-		return;
-	}
-	convert_to_typed(c, y, x->type, 0);
-	if (y->mode == Addressing_Invalid) {
-		x->mode = Addressing_Invalid;
-		return;
-	}
-
-	if (token_is_comparison(op.kind)) {
-		check_comparison(c, x, y, op.kind);
-		return;
-	}
-
-
-	if (check_binary_vector_expr(c, op, x, y)) {
-		x->mode = Addressing_Value;
-		x->type = x->type;
-		return;
-	}
-	if (check_binary_vector_expr(c, op, y, x)) {
-		x->mode = Addressing_Value;
-		x->type = y->type;
-		return;
-	}
-	if (!are_types_identical(x->type, y->type)) {
-		if (x->type != t_invalid &&
-		    y->type != t_invalid) {
-			gbString xt = type_to_string(x->type);
-			gbString yt = type_to_string(y->type);
-			gbString expr_str = expr_to_string(x->expr);
-			error(op, "Mismatched types in binary expression `%s` : `%s` vs `%s`", expr_str, xt, yt);
-			gb_string_free(expr_str);
-			gb_string_free(yt);
-			gb_string_free(xt);
-		}
-		x->mode = Addressing_Invalid;
-		return;
-	}
-
-	if (!check_binary_op(c, x, op)) {
-		x->mode = Addressing_Invalid;
-		return;
-	}
-
-	switch (op.kind) {
-	case Token_Quo:
-	case Token_Mod:
-	case Token_ModMod:
-	case Token_QuoEq:
-	case Token_ModEq:
-	case Token_ModModEq:
-		if ((x->mode == Addressing_Constant || is_type_integer(x->type)) &&
-		    y->mode == Addressing_Constant) {
-			bool fail = false;
-			switch (y->value.kind) {
-			case ExactValue_Integer:
-				if (i128_eq(y->value.value_integer, I128_ZERO)) {
-					fail = true;
-				}
-				break;
-			case ExactValue_Float:
-				if (y->value.value_float == 0.0) {
-					fail = true;
-				}
-				break;
-			}
-
-			if (fail) {
-				error_node(y->expr, "Division by zero not allowed");
-				x->mode = Addressing_Invalid;
-				return;
-			}
-		}
-	}
-
-	if (x->mode == Addressing_Constant &&
-	    y->mode == Addressing_Constant) {
-		ExactValue a = x->value;
-		ExactValue b = y->value;
-
-		Type *type = base_type(x->type);
-		if (is_type_pointer(type)) {
-			GB_ASSERT(op.kind == Token_Sub);
-			i64 bytes = a.value_pointer - b.value_pointer;
-			i64 diff = bytes/type_size_of(c->allocator, type);
-			x->value = exact_value_pointer(diff);
-			return;
-		}
-
-		if (!is_type_constant_type(type)) {
-			gbString xt = type_to_string(x->type);
-			gbString err_str = expr_to_string(node);
-			error(op, "Invalid type, `%s`, for constant binary expression `%s`", xt, err_str);
-			gb_string_free(err_str);
-			gb_string_free(xt);
-			x->mode = Addressing_Invalid;
-			return;
-		}
-
-		if (op.kind == Token_Quo && is_type_integer(type)) {
-			op.kind = Token_QuoEq; // NOTE(bill): Hack to get division of integers
-		}
-		x->value = exact_binary_operator_value(op.kind, a, b);
-		if (is_type_typed(type)) {
-			if (node != NULL) {
-				x->expr = node;
-			}
-			check_is_expressible(c, x, type);
-		}
-		return;
-	}
-
-	x->mode = Addressing_Value;
-}
-
-
-void update_expr_type(Checker *c, AstNode *e, Type *type, bool final) {
-	HashKey key = hash_pointer(e);
-	ExprInfo *found = map_expr_info_get(&c->info.untyped, key);
-	if (found == NULL) {
-		return;
-	}
-	ExprInfo old = *found;
-
-	switch (e->kind) {
-	case_ast_node(ue, UnaryExpr, e);
-		if (old.value.kind != ExactValue_Invalid) {
-			// NOTE(bill): if `e` is constant, the operands will be constant too.
-			// They don't need to be updated as they will be updated later and
-			// checked at the end of general checking stage.
-			break;
-		}
-		update_expr_type(c, ue->expr, type, final);
-	case_end;
-
-	case_ast_node(be, BinaryExpr, e);
-		if (old.value.kind != ExactValue_Invalid) {
-			// See above note in UnaryExpr case
-			break;
-		}
-		if (token_is_comparison(be->op.kind)) {
-			// NOTE(bill): Do nothing as the types are fine
-		} else if (token_is_shift(be->op.kind)) {
-			update_expr_type(c, be->left,  type, final);
-		} else {
-			update_expr_type(c, be->left,  type, final);
-			update_expr_type(c, be->right, type, final);
-		}
-	case_end;
-
-	case_ast_node(pe, ParenExpr, e);
-		update_expr_type(c, pe->expr, type, final);
-	case_end;
-	}
-
-	if (!final && is_type_untyped(type)) {
-		old.type = base_type(type);
-		map_expr_info_set(&c->info.untyped, key, old);
-		return;
-	}
-
-	// We need to remove it and then give it a new one
-	map_expr_info_remove(&c->info.untyped, key);
-
-	if (old.is_lhs && !is_type_integer(type)) {
-		gbString expr_str = expr_to_string(e);
-		gbString type_str = type_to_string(type);
-		error_node(e, "Shifted operand %s must be an integer, got %s", expr_str, type_str);
-		gb_string_free(type_str);
-		gb_string_free(expr_str);
-		return;
-	}
-
-	add_type_and_value(&c->info, e, old.mode, type, old.value);
-}
-
-void update_expr_value(Checker *c, AstNode *e, ExactValue value) {
-	ExprInfo *found = map_expr_info_get(&c->info.untyped, hash_pointer(e));
-	if (found) {
-		found->value = value;
-	}
-}
-
-void convert_untyped_error(Checker *c, Operand *operand, Type *target_type) {
-	gbString expr_str = expr_to_string(operand->expr);
-	gbString type_str = type_to_string(target_type);
-	char *extra_text = "";
-
-	if (operand->mode == Addressing_Constant) {
-		if (i128_eq(operand->value.value_integer, I128_ZERO)) {
-			if (str_ne(make_string_c(expr_str), str_lit("nil"))) { // HACK NOTE(bill): Just in case
-				// NOTE(bill): Doesn't matter what the type is as it's still zero in the union
-				extra_text = " - Did you want `nil`?";
-			}
-		}
-	}
-	error_node(operand->expr, "Cannot convert `%s` to `%s`%s", expr_str, type_str, extra_text);
-
-	gb_string_free(type_str);
-	gb_string_free(expr_str);
-	operand->mode = Addressing_Invalid;
-}
-
-ExactValue convert_exact_value_for_type(ExactValue v, Type *type) {
-	Type *t = core_type(type);
-	if (is_type_boolean(t)) {
-		// v = exact_value_to_boolean(v);
-	} else if (is_type_float(t)) {
-		v = exact_value_to_float(v);
-	} else if (is_type_integer(t)) {
-		v = exact_value_to_integer(v);
-	} else if (is_type_pointer(t)) {
-		v = exact_value_to_integer(v);
-	} else if (is_type_complex(t)) {
-		v = exact_value_to_complex(v);
-	}
-	return v;
-}
-
-// NOTE(bill): Set initial level to 0
-void convert_to_typed(Checker *c, Operand *operand, Type *target_type, i32 level) {
-	GB_ASSERT_NOT_NULL(target_type);
-	if (operand->mode == Addressing_Invalid ||
-	    operand->mode == Addressing_Type ||
-	    is_type_typed(operand->type) ||
-	    target_type == t_invalid) {
-		return;
-	}
-
-	if (is_type_untyped(target_type)) {
-		GB_ASSERT(operand->type->kind == Type_Basic);
-		GB_ASSERT(target_type->kind == Type_Basic);
-		BasicKind x_kind = operand->type->Basic.kind;
-		BasicKind y_kind = target_type->Basic.kind;
-		if (is_type_numeric(operand->type) && is_type_numeric(target_type)) {
-			if (x_kind < y_kind) {
-				operand->type = target_type;
-				update_expr_type(c, operand->expr, target_type, false);
-			}
-		} else if (x_kind != y_kind) {
-			operand->mode = Addressing_Invalid;
-			convert_untyped_error(c, operand, target_type);
-			return;
-		}
-		return;
-	}
-
-	Type *t = core_type(target_type);
-	switch (t->kind) {
-	case Type_Basic:
-		if (operand->mode == Addressing_Constant) {
-			check_is_expressible(c, operand, t);
-			if (operand->mode == Addressing_Invalid) {
-				return;
-			}
-			update_expr_value(c, operand->expr, operand->value);
-		} else {
-			switch (operand->type->Basic.kind) {
-			case Basic_UntypedBool:
-				if (!is_type_boolean(target_type)) {
-					operand->mode = Addressing_Invalid;
-					convert_untyped_error(c, operand, target_type);
-					return;
-				}
-				break;
-			case Basic_UntypedInteger:
-			case Basic_UntypedFloat:
-			case Basic_UntypedComplex:
-			case Basic_UntypedRune:
-				if (!is_type_numeric(target_type)) {
-					operand->mode = Addressing_Invalid;
-					convert_untyped_error(c, operand, target_type);
-					return;
-				}
-				break;
-
-			case Basic_UntypedNil:
-				if (is_type_any(target_type)) {
-					target_type = t_untyped_nil;
-				} else if (!type_has_nil(target_type)) {
-					operand->mode = Addressing_Invalid;
-					convert_untyped_error(c, operand, target_type);
-					return;
-				}
-				break;
-			}
-		}
-		break;
-
-	case Type_Vector: {
-		Type *elem = base_vector_type(t);
-		if (check_is_assignable_to(c, operand, elem)) {
-			operand->mode = Addressing_Value;
-		} else {
-			operand->mode = Addressing_Invalid;
-			convert_untyped_error(c, operand, target_type);
-			return;
-		}
-	} break;
-
-
-	default:
-		if (!is_type_untyped_nil(operand->type) || !type_has_nil(target_type)) {
-			operand->mode = Addressing_Invalid;
-			convert_untyped_error(c, operand, target_type);
-			return;
-		}
-		target_type = t_untyped_nil;
-		break;
-	}
-
-	operand->type = target_type;
-	update_expr_type(c, operand->expr, target_type, true);
-}
-
-bool check_index_value(Checker *c, bool open_range, AstNode *index_value, i64 max_count, i64 *value) {
-	Operand operand = {Addressing_Invalid};
-	check_expr(c, &operand, index_value);
-	if (operand.mode == Addressing_Invalid) {
-		if (value) *value = 0;
-		return false;
-	}
-
-	convert_to_typed(c, &operand, t_int, 0);
-	if (operand.mode == Addressing_Invalid) {
-		if (value) *value = 0;
-		return false;
-	}
-
-	if (!is_type_integer(operand.type)) {
-		gbString expr_str = expr_to_string(operand.expr);
-		error_node(operand.expr, "Index `%s` must be an integer", expr_str);
-		gb_string_free(expr_str);
-		if (value) *value = 0;
-		return false;
-	}
-
-	if (operand.mode == Addressing_Constant &&
-	    (c->context.stmt_state_flags & StmtStateFlag_no_bounds_check) == 0) {
-		i64 i = i128_to_i64(exact_value_to_integer(operand.value).value_integer);
-		if (i < 0) {
-			gbString expr_str = expr_to_string(operand.expr);
-			error_node(operand.expr, "Index `%s` cannot be a negative value", expr_str);
-			gb_string_free(expr_str);
-			if (value) *value = 0;
-			return false;
-		}
-
-		if (max_count >= 0) { // NOTE(bill): Do array bound checking
-			if (value) *value = i;
-			bool out_of_bounds = false;
-			if (open_range) {
-				out_of_bounds = i >= max_count;
-			} else {
-				out_of_bounds = i > max_count;
-			}
-			if (out_of_bounds) {
-				gbString expr_str = expr_to_string(operand.expr);
-				error_node(operand.expr, "Index `%s` is out of bounds range 0..<%lld", expr_str, max_count);
-				gb_string_free(expr_str);
-				return false;
-			}
-
-
-			return true;
-		}
-	}
-
-	// NOTE(bill): It's alright :D
-	if (value) *value = -1;
-	return true;
-}
-
-isize entity_overload_count(Scope *s, String name) {
-	Entity *e = scope_lookup_entity(s, name);
-	if (e == NULL) {
-		return 0;
-	}
-	if (e->kind == Entity_Procedure) {
-		// NOTE(bill): Overloads are only allowed with the same scope
-		return map_entity_multi_count(&s->elements, hash_string(e->token.string));
-	}
-	return 1;
-}
-
-bool check_is_field_exported(Checker *c, Entity *field) {
-	if (field == NULL) {
-		// NOTE(bill): Just incase
-		return true;
-	}
-	if (field->kind != Entity_Variable) {
-		return true;
-	}
-	Scope *file_scope = field->scope;
-	if (file_scope == NULL) {
-		return true;
-	}
-	while (!file_scope->is_file) {
-		file_scope = file_scope->parent;
-	}
-	if (!is_entity_exported(field) && file_scope != c->context.file_scope) {
-		return false;
-	}
-	return true;
-}
-
-Entity *check_selector(Checker *c, Operand *operand, AstNode *node, Type *type_hint) {
-	ast_node(se, SelectorExpr, node);
-
-	bool check_op_expr = true;
-	Entity *expr_entity = NULL;
-	Entity *entity = NULL;
-	Selection sel = {0}; // NOTE(bill): Not used if it's an import name
-
-	operand->expr = node;
-
-	AstNode *op_expr  = se->expr;
-	AstNode *selector = unparen_expr(se->selector);
-	if (selector == NULL) {
-		operand->mode = Addressing_Invalid;
-		operand->expr = node;
-		return NULL;
-	}
-
-	if (selector->kind != AstNode_Ident && selector->kind != AstNode_BasicLit) {
-	// if (selector->kind != AstNode_Ident) {
-		error_node(selector, "Illegal selector kind: `%.*s`", LIT(ast_node_strings[selector->kind]));
-		operand->mode = Addressing_Invalid;
-		operand->expr = node;
-		return NULL;
-	}
-
-	if (op_expr->kind == AstNode_Ident) {
-		String op_name = op_expr->Ident.string;
-		Entity *e = scope_lookup_entity(c->context.scope, op_name);
-
-		add_entity_use(c, op_expr, e);
-		expr_entity = e;
-
-		Entity *original_e = e;
-		if (e != NULL && e->kind == Entity_ImportName && selector->kind == AstNode_Ident) {
-			// IMPORTANT NOTE(bill): This is very sloppy code but it's also very fragile
-			// It pretty much needs to be in this order and this way
-			// If you can clean this up, please do but be really careful
-			String import_name = op_name;
-			Scope *import_scope = e->ImportName.scope;
-			String entity_name = selector->Ident.string;
-
-			check_op_expr = false;
-			entity = scope_lookup_entity(import_scope, entity_name);
-			bool is_declared = entity != NULL;
-			if (is_declared) {
-				if (entity->kind == Entity_Builtin) {
-					// NOTE(bill): Builtin's are in the universe scope which is part of every scopes hierarchy
-					// This means that we should just ignore the found result through it
-					is_declared = false;
-				} else if (entity->scope->is_global && !import_scope->is_global) {
-					is_declared = false;
-				}
-			}
-			if (!is_declared) {
-				error_node(op_expr, "`%.*s` is not declared by `%.*s`", LIT(entity_name), LIT(import_name));
-				operand->mode = Addressing_Invalid;
-				operand->expr = node;
-				return NULL;
-			}
-			check_entity_decl(c, entity, NULL, NULL);
-			GB_ASSERT(entity->type != NULL);
-
-			isize overload_count = entity_overload_count(import_scope, entity_name);
-			bool is_overloaded = overload_count > 1;
-
-			bool implicit_is_found = map_bool_get(&e->ImportName.scope->implicit, hash_pointer(entity)) != NULL;
-			bool is_not_exported = !is_entity_exported(entity);
-			if (!implicit_is_found) {
-				is_not_exported = false;
-			} else if (entity->kind == Entity_ImportName) {
-				is_not_exported = true;
-			}
-
-			if (is_not_exported) {
-				gbString sel_str = expr_to_string(selector);
-				error_node(op_expr, "`%s` is not exported by `%.*s`", sel_str, LIT(import_name));
-				gb_string_free(sel_str);
-				operand->mode = Addressing_Invalid;
-				operand->expr = node;
-				return NULL;
-			}
-
-			if (is_overloaded) {
-				HashKey key = hash_string(entity_name);
-				bool skip = false;
-
-				Entity **procs = gb_alloc_array(heap_allocator(), Entity *, overload_count);
-				map_entity_multi_get_all(&import_scope->elements, key, procs);
-
-				for (isize i = 0; i < overload_count; i++) {
-					Type *t = base_type(procs[i]->type);
-					if (t == t_invalid) {
-						continue;
-					}
-
-					// NOTE(bill): Check to see if it's imported
-					if (map_bool_get(&import_scope->implicit, hash_pointer(procs[i]))) {
-						gb_swap(Entity *, procs[i], procs[overload_count-1]);
-						overload_count--;
-						i--; // NOTE(bill): Counteract the post event
-						continue;
-					}
-
-					Operand x = {0};
-					x.mode = Addressing_Value;
-					x.type = t;
-					if (type_hint != NULL) {
-						if (check_is_assignable_to(c, &x, type_hint)) {
-							entity = procs[i];
-							skip = true;
-							break;
-						}
-					}
-				}
-
-				if (overload_count > 0 && !skip) {
-					operand->mode              = Addressing_Overload;
-					operand->type              = t_invalid;
-					operand->expr              = node;
-					operand->overload_count    = overload_count;
-					operand->overload_entities = procs;
-					return procs[0];
-				}
-			}
-		}
-	}
-
-	if (check_op_expr) {
-		check_expr_base(c, operand, op_expr, NULL);
-		if (operand->mode == Addressing_Invalid) {
-			operand->mode = Addressing_Invalid;
-			operand->expr = node;
-			return NULL;
-		}
-	}
-
-
-	if (entity == NULL && selector->kind == AstNode_Ident) {
-		String field_name = selector->Ident.string;
-		sel = lookup_field(c->allocator, operand->type, field_name, operand->mode == Addressing_Type);
-
-		if (operand->mode != Addressing_Type && !check_is_field_exported(c, sel.entity)) {
-			error_node(op_expr, "`%.*s` is an unexported field", LIT(field_name));
-			operand->mode = Addressing_Invalid;
-			operand->expr = node;
-			return NULL;
-		}
-		entity = sel.entity;
-
-		// NOTE(bill): Add type info needed for fields like `names`
-		if (entity != NULL && (entity->flags&EntityFlag_TypeField)) {
-			add_type_info_type(c, operand->type);
-		}
-	}
-	if (entity == NULL && selector->kind == AstNode_BasicLit) {
-		if (is_type_struct(operand->type) || is_type_tuple(operand->type)) {
-			Type *type = base_type(operand->type);
-			Operand o = {0};
-			check_expr(c, &o, selector);
-			if (o.mode != Addressing_Constant ||
-			    !is_type_integer(o.type)) {
-				error_node(op_expr, "Indexed based selectors must be a constant integer %s");
-				operand->mode = Addressing_Invalid;
-				operand->expr = node;
-				return NULL;
-			}
-			i64 index = i128_to_i64(o.value.value_integer);
-			if (index < 0) {
-				error_node(o.expr, "Index %lld cannot be a negative value", index);
-				operand->mode = Addressing_Invalid;
-				operand->expr = node;
-				return NULL;
-			}
-
-			i64 max_count = 0;
-			switch (type->kind) {
-			case Type_Record: max_count = type->Record.field_count;   break;
-			case Type_Tuple:  max_count = type->Tuple.variable_count; break;
-			}
-
-			if (index >= max_count) {
-				error_node(o.expr, "Index %lld is out of bounds range 0..<%lld", index, max_count);
-				operand->mode = Addressing_Invalid;
-				operand->expr = node;
-				return NULL;
-			}
-
-			sel = lookup_field_from_index(heap_allocator(), type, index);
-			entity = sel.entity;
-
-			GB_ASSERT(entity != NULL);
-
-		} else {
-			error_node(op_expr, "Indexed based selectors may only be used on structs or tuples");
-			operand->mode = Addressing_Invalid;
-			operand->expr = node;
-			return NULL;
-		}
-	}
-
-	if (entity == NULL &&
-	    operand->type != NULL && is_type_untyped(operand->type) && is_type_string(operand->type)) {
-		String s = operand->value.value_string;
-		operand->mode = Addressing_Constant;
-		operand->value = exact_value_i64(s.len);
-		operand->type = t_untyped_integer;
-		return NULL;
-	}
-
-	if (entity == NULL) {
-		gbString op_str   = expr_to_string(op_expr);
-		gbString type_str = type_to_string(operand->type);
-		gbString sel_str  = expr_to_string(selector);
-		error_node(op_expr, "`%s` of type `%s` has no field `%s`", op_str, type_str, sel_str);
-		gb_string_free(sel_str);
-		gb_string_free(type_str);
-		gb_string_free(op_str);
-		operand->mode = Addressing_Invalid;
-		operand->expr = node;
-		return NULL;
-	}
-
-	if (expr_entity != NULL && expr_entity->kind == Entity_Constant && entity->kind != Entity_Constant) {
-		gbString op_str   = expr_to_string(op_expr);
-		gbString type_str = type_to_string(operand->type);
-		gbString sel_str  = expr_to_string(selector);
-		error_node(op_expr, "Cannot access non-constant field `%s` from `%s`", sel_str, op_str);
-		gb_string_free(sel_str);
-		gb_string_free(type_str);
-		gb_string_free(op_str);
-		operand->mode = Addressing_Invalid;
-		operand->expr = node;
-		return NULL;
-	}
-
-
-
-	add_entity_use(c, selector, entity);
-
-	switch (entity->kind) {
-	case Entity_Constant:
-		operand->mode = Addressing_Constant;
-		operand->value = entity->Constant.value;
-		break;
-	case Entity_Variable:
-		// TODO(bill): Is this the rule I need?
-		if (operand->mode == Addressing_Immutable) {
-			// Okay
-		} else if (sel.indirect || operand->mode != Addressing_Value) {
-			operand->mode = Addressing_Variable;
-		} else {
-			operand->mode = Addressing_Value;
-		}
-		break;
-	case Entity_TypeAlias:
-	case Entity_TypeName:
-		operand->mode = Addressing_Type;
-		break;
-	case Entity_Procedure:
-		operand->mode = Addressing_Value;
-		break;
-	case Entity_Builtin:
-		operand->mode = Addressing_Builtin;
-		operand->builtin_id = entity->Builtin.id;
-		break;
-
-	// NOTE(bill): These cases should never be hit but are here for sanity reasons
-	case Entity_Nil:
-		operand->mode = Addressing_Value;
-		break;
-	}
-
-	operand->type = entity->type;
-	operand->expr = node;
-
-	return entity;
-}
-
-bool check_builtin_procedure(Checker *c, Operand *operand, AstNode *call, i32 id) {
-	GB_ASSERT(call->kind == AstNode_CallExpr);
-	ast_node(ce, CallExpr, call);
-	BuiltinProc *bp = &builtin_procs[id];
-	{
-		char *err = NULL;
-		if (ce->args.count < bp->arg_count) {
-			err = "Too few";
-		} else if (ce->args.count > bp->arg_count && !bp->variadic) {
-			err = "Too many";
-		}
-
-		if (err != NULL) {
-			gbString expr = expr_to_string(ce->proc);
-			error(ce->close, "%s arguments for `%s`, expected %td, got %td",
-			      err, expr,
-			      bp->arg_count, ce->args.count);
-			gb_string_free(expr);
-			return false;
-		}
-	}
-
-	bool vari_expand = (ce->ellipsis.pos.line != 0);
-	if (vari_expand && id != BuiltinProc_append) {
-		error(ce->ellipsis, "Invalid use of `..` with built-in procedure `append`");
-		return false;
-	}
-
-
-	switch (id) {
-	case BuiltinProc_new:
-	case BuiltinProc_make:
-	case BuiltinProc_size_of:
-	case BuiltinProc_align_of:
-	case BuiltinProc_offset_of:
-	case BuiltinProc_type_info:
-	case BuiltinProc_transmute:
-		// NOTE(bill): The first arg may be a Type, this will be checked case by case
-		break;
-	default:
-		check_multi_expr(c, operand, ce->args.e[0]);
-	}
-
-	switch (id) {
-	default:
-		GB_PANIC("Implement builtin procedure: %.*s", LIT(builtin_procs[id].name));
-		break;
-
-	case BuiltinProc_len:
-	case BuiltinProc_cap: {
-		// len :: proc(Type) -> int
-		// cap :: proc(Type) -> int
-		Type *op_type = type_deref(operand->type);
-		Type *type = t_int;
-		AddressingMode mode = Addressing_Invalid;
-		ExactValue value = {0};
-		if (is_type_string(op_type) && id == BuiltinProc_len) {
-			if (operand->mode == Addressing_Constant) {
-				mode = Addressing_Constant;
-				String str = operand->value.value_string;
-				value = exact_value_i64(str.len);
-				type = t_untyped_integer;
-			} else {
-				mode = Addressing_Value;
-			}
-		} else if (is_type_array(op_type)) {
-			Type *at = core_type(op_type);
-			mode = Addressing_Constant;
-			value = exact_value_i64(at->Array.count);
-			type = t_untyped_integer;
-		} else if (is_type_vector(op_type) && id == BuiltinProc_len) {
-			Type *at = core_type(op_type);
-			mode = Addressing_Constant;
-			value = exact_value_i64(at->Vector.count);
-			type = t_untyped_integer;
-		} else if (is_type_slice(op_type)) {
-			mode = Addressing_Value;
-		} else if (is_type_dynamic_array(op_type)) {
-			mode = Addressing_Value;
-		} else if (is_type_map(op_type)) {
-			mode = Addressing_Value;
-		}
-
-		if (mode == Addressing_Invalid) {
-			String name = builtin_procs[id].name;
-			gbString t = type_to_string(operand->type);
-			error_node(call, "`%.*s` is not supported for `%s`", LIT(name), t);
-			return false;
-		}
-
-		operand->mode  = mode;
-		operand->value = value;
-		operand->type  = type;
-	} break;
-
-	case BuiltinProc_new: {
-		// new :: proc(Type) -> ^Type
-		Operand op = {0};
-		check_expr_or_type(c, &op, ce->args.e[0]);
-		Type *type = op.type;
-		if ((op.mode != Addressing_Type && type == NULL) || type == t_invalid) {
-			error_node(ce->args.e[0], "Expected a type for `new`");
-			return false;
-		}
-		operand->mode = Addressing_Value;
-		operand->type = make_type_pointer(c->allocator, type);
-	} break;
-	#if 0
-	case BuiltinProc_new_slice: {
-		// new_slice :: proc(Type, len: int) -> []Type
-		// new_slice :: proc(Type, len, cap: int) -> []Type
-		Operand op = {0};
-		check_expr_or_type(c, &op, ce->args.e[0]);
-		Type *type = op.type;
-		if ((op.mode != Addressing_Type && type == NULL) || type == t_invalid) {
-			error_node(ce->args.e[0], "Expected a type for `new_slice`");
-			return false;
-		}
-
-		isize arg_count = ce->args.count;
-		if (arg_count < 2 || 3 < arg_count) {
-			error_node(ce->args.e[0], "`new_slice` expects 2 or 3 arguments, found %td", arg_count);
-			// NOTE(bill): Return the correct type to reduce errors
-		} else {
-			// If any are constant
-			i64 sizes[2] = {0};
-			isize size_count = 0;
-			for (isize i = 1; i < arg_count; i++) {
-				i64 val = 0;
-				bool ok = check_index_value(c, ce->args.e[i], -1, &val);
-				if (ok && val >= 0) {
-					GB_ASSERT(size_count < gb_count_of(sizes));
-					sizes[size_count++] = val;
-				}
-			}
-
-			if (size_count == 2 && sizes[0] > sizes[1]) {
-				error_node(ce->args.e[1], "`new_slice` count and capacity are swapped");
-				// No need quit
-			}
-		}
-
-		operand->mode = Addressing_Value;
-		operand->type = make_type_slice(c->allocator, type);
-	} break;
-	#endif
-	case BuiltinProc_make: {
-		// make :: proc(Type, len: int) -> Type
-		// make :: proc(Type, len, cap: int) -> Type
-		Operand op = {0};
-		check_expr_or_type(c, &op, ce->args.e[0]);
-		Type *type = op.type;
-		if ((op.mode != Addressing_Type && type == NULL) || type == t_invalid) {
-			error_node(ce->args.e[0], "Expected a type for `make`");
-			return false;
-		}
-
-		isize min_args = 0;
-		isize max_args = 1;
-		if (is_type_slice(type)) {
-			min_args = 2;
-			max_args = 3;
-		} else if (is_type_dynamic_map(type)) {
-			min_args = 1;
-			max_args = 2;
-		} else if (is_type_dynamic_array(type)) {
-			min_args = 1;
-			max_args = 3;
-		} else {
-			gbString str = type_to_string(type);
-			error_node(call, "Cannot `make` %s; type must be a slice, map, or dynamic array", str);
-			gb_string_free(str);
-			return false;
-		}
-
-		isize arg_count = ce->args.count;
-		if (arg_count < min_args || max_args < arg_count) {
-			error_node(ce->args.e[0], "`make` expects %td or %d argument, found %td", min_args, max_args, arg_count);
-			return false;
-		}
-
-		// If any are constant
-		i64 sizes[4] = {0};
-		isize size_count = 0;
-		for (isize i = 1; i < arg_count; i++) {
-			i64 val = 0;
-			bool ok = check_index_value(c, false, ce->args.e[i], -1, &val);
-			if (ok && val >= 0) {
-				GB_ASSERT(size_count < gb_count_of(sizes));
-				sizes[size_count++] = val;
-			}
-		}
-
-		if (size_count == 2 && sizes[0] > sizes[1]) {
-			error_node(ce->args.e[1], "`make` count and capacity are swapped");
-			// No need quit
-		}
-
-		operand->mode = Addressing_Value;
-		operand->type = type;
-	} break;
-
-	case BuiltinProc_free: {
-		// free :: proc(^Type)
-		// free :: proc([]Type)
-		// free :: proc(string)
-		// free :: proc(map[K]T)
-		Type *type = operand->type;
-		bool ok = false;
-		if (is_type_pointer(type)) {
-			ok = true;
-		} else if (is_type_slice(type)) {
-			ok = true;
-		} else if (is_type_string(type)) {
-			ok = true;
-		} else if (is_type_dynamic_array(type)) {
-			ok = true;
-		} else if (is_type_dynamic_map(type)) {
-			ok = true;
-		}
-
-		if (!ok) {
-			gbString type_str = type_to_string(type);
-			error_node(operand->expr, "Invalid type for `free`, got `%s`", type_str);
-			gb_string_free(type_str);
-			return false;
-		}
-
-
-		operand->mode = Addressing_NoValue;
-	} break;
-
-
-	case BuiltinProc_reserve: {
-		// reserve :: proc([dynamic]Type, count: int) {
-		// reserve :: proc(map[Key]Type, count: int) {
-		Type *type = operand->type;
-		if (!is_type_dynamic_array(type) && !is_type_dynamic_map(type)) {
-			gbString str = type_to_string(type);
-			error_node(operand->expr, "Expected a dynamic array or dynamic map, got `%s`", str);
-			gb_string_free(str);
-			return false;
-		}
-
-		AstNode *capacity = ce->args.e[1];
-		Operand op = {0};
-		check_expr(c, &op, capacity);
-		if (op.mode == Addressing_Invalid) {
-			return false;
-		}
-		Type *arg_type = base_type(op.type);
-		if (!is_type_integer(arg_type)) {
-			error_node(operand->expr, "`reserve` capacities must be an integer");
-			return false;
-		}
-
-		operand->type = NULL;
-		operand->mode = Addressing_NoValue;
-	} break;
-
-	case BuiltinProc_clear: {
-		Type *type = operand->type;
-		bool is_pointer = is_type_pointer(type);
-		type = base_type(type_deref(type));
-		if (!is_type_dynamic_array(type) && !is_type_map(type) && !is_type_slice(type)) {
-			gbString str = type_to_string(type);
-			error_node(operand->expr, "Invalid type for `clear`, got `%s`", str);
-			gb_string_free(str);
-			return false;
-		}
-
-		operand->type = NULL;
-		operand->mode = Addressing_NoValue;
-	} break;
-
-	case BuiltinProc_append: {
-		// append :: proc([dynamic]Type, item: ..Type)
-		// append :: proc([]Type, item: ..Type)
-		Operand prev_operand = *operand;
-
-		Type *type = operand->type;
-		bool is_pointer = is_type_pointer(type);
-		type = base_type(type_deref(type));
-		if (!is_type_dynamic_array(type) && !is_type_slice(type)) {
-			gbString str = type_to_string(type);
-			error_node(operand->expr, "Expected a slice or dynamic array, got `%s`", str);
-			gb_string_free(str);
-			return false;
-		}
-
-		bool is_addressable = operand->mode == Addressing_Variable;
-		if (is_pointer) {
-			is_addressable = true;
-		}
-		if (!is_addressable) {
-			error_node(operand->expr, "`append` can only operate on addressable values");
-			return false;
-		}
-
-		Type *elem = NULL;
-		if (is_type_dynamic_array(type)) {
-			elem = type->DynamicArray.elem;
-		} else {
-			elem = type->Slice.elem;
-		}
-		Type *slice_elem = make_type_slice(c->allocator, elem);
-
-		Type *proc_type_params = make_type_tuple(c->allocator);
-		proc_type_params->Tuple.variables = gb_alloc_array(c->allocator, Entity *, 2);
-		proc_type_params->Tuple.variable_count = 2;
-		proc_type_params->Tuple.variables[0] = make_entity_param(c->allocator, NULL, blank_token, operand->type, false, false);
-		proc_type_params->Tuple.variables[1] = make_entity_param(c->allocator, NULL, blank_token, slice_elem, false, false);
-		Type *proc_type = make_type_proc(c->allocator, NULL, proc_type_params, 2, NULL, false, true, ProcCC_Odin);
-
-		check_call_arguments(c, &prev_operand, proc_type, call);
-
-		if (prev_operand.mode == Addressing_Invalid) {
-			return false;
-		}
-		operand->mode = Addressing_Value;
-		operand->type = t_int;
-	} break;
-
-	case BuiltinProc_delete: {
-		// delete :: proc(map[Key]Value, key: Key)
-		Type *type = operand->type;
-		if (!is_type_map(type)) {
-			gbString str = type_to_string(type);
-			error_node(operand->expr, "Expected a map, got `%s`", str);
-			gb_string_free(str);
-			return false;
-		}
-
-		Type *key = base_type(type)->Map.key;
-		Operand x = {Addressing_Invalid};
-		AstNode *key_node = ce->args.e[1];
-		Operand op = {0};
-		check_expr(c, &op, key_node);
-		if (op.mode == Addressing_Invalid) {
-			return false;
-		}
-
-		if (!check_is_assignable_to(c, &op, key)) {
-			gbString kt = type_to_string(key);
-			gbString ot = type_to_string(op.type);
-			error_node(operand->expr, "Expected a key of type `%s`, got `%s`", key, ot);
-			gb_string_free(ot);
-			gb_string_free(kt);
-			return false;
-		}
-
-		operand->mode = Addressing_NoValue;
-	} break;
-
-
-	case BuiltinProc_size_of: {
-		// size_of :: proc(Type) -> untyped int
-		Type *type = check_type(c, ce->args.e[0]);
-		if (type == NULL || type == t_invalid) {
-			error_node(ce->args.e[0], "Expected a type for `size_of`");
-			return false;
-		}
-
-		operand->mode = Addressing_Constant;
-		operand->value = exact_value_i64(type_size_of(c->allocator, type));
-		operand->type = t_untyped_integer;
-
-	} break;
-
-	case BuiltinProc_size_of_val:
-		// size_of_val :: proc(val: Type) -> untyped int
-		check_assignment(c, operand, NULL, str_lit("argument of `size_of_val`"));
-		if (operand->mode == Addressing_Invalid) {
-			return false;
-		}
-
-		operand->mode = Addressing_Constant;
-		operand->value = exact_value_i64(type_size_of(c->allocator, operand->type));
-		operand->type = t_untyped_integer;
-		break;
-
-	case BuiltinProc_align_of: {
-		// align_of :: proc(Type) -> untyped int
-		Type *type = check_type(c, ce->args.e[0]);
-		if (type == NULL || type == t_invalid) {
-			error_node(ce->args.e[0], "Expected a type for `align_of`");
-			return false;
-		}
-		operand->mode = Addressing_Constant;
-		operand->value = exact_value_i64(type_align_of(c->allocator, type));
-		operand->type = t_untyped_integer;
-	} break;
-
-	case BuiltinProc_align_of_val:
-		// align_of_val :: proc(val: Type) -> untyped int
-		check_assignment(c, operand, NULL, str_lit("argument of `align_of_val`"));
-		if (operand->mode == Addressing_Invalid) {
-			return false;
-		}
-
-		operand->mode = Addressing_Constant;
-		operand->value = exact_value_i64(type_align_of(c->allocator, operand->type));
-		operand->type = t_untyped_integer;
-		break;
-
-	case BuiltinProc_offset_of: {
-		// offset_of :: proc(Type, field) -> untyped int
-		Operand op = {0};
-		Type *bt = check_type(c, ce->args.e[0]);
-		Type *type = base_type(bt);
-		if (type == NULL || type == t_invalid) {
-			error_node(ce->args.e[0], "Expected a type for `offset_of`");
-			return false;
-		}
-
-		AstNode *field_arg = unparen_expr(ce->args.e[1]);
-		if (field_arg == NULL ||
-		    field_arg->kind != AstNode_Ident) {
-			error_node(field_arg, "Expected an identifier for field argument");
-			return false;
-		}
-		if (is_type_array(type) || is_type_vector(type)) {
-			error_node(field_arg, "Invalid type for `offset_of`");
-			return false;
-		}
-
-
-		ast_node(arg, Ident, field_arg);
-		Selection sel = lookup_field(c->allocator, type, arg->string, operand->mode == Addressing_Type);
-		if (sel.entity == NULL) {
-			gbString type_str = type_to_string(bt);
-			error_node(ce->args.e[0],
-			      "`%s` has no field named `%.*s`", type_str, LIT(arg->string));
-			gb_string_free(type_str);
-			return false;
-		}
-		if (sel.indirect) {
-			gbString type_str = type_to_string(bt);
-			error_node(ce->args.e[0],
-			      "Field `%.*s` is embedded via a pointer in `%s`", LIT(arg->string), type_str);
-			gb_string_free(type_str);
-			return false;
-		}
-
-		operand->mode = Addressing_Constant;
-		operand->value = exact_value_i64(type_offset_of_from_selection(c->allocator, type, sel));
-		operand->type  = t_untyped_integer;
-	} break;
-
-	case BuiltinProc_offset_of_val: {
-		// offset_of_val :: proc(val: expression) -> untyped int
-		AstNode *arg = unparen_expr(ce->args.e[0]);
-		if (arg->kind != AstNode_SelectorExpr) {
-			gbString str = expr_to_string(arg);
-			error_node(arg, "`%s` is not a selector expression", str);
-			return false;
-		}
-		ast_node(s, SelectorExpr, arg);
-
-		check_expr(c, operand, s->expr);
-		if (operand->mode == Addressing_Invalid) {
-			return false;
-		}
-
-		Type *type = operand->type;
-		if (base_type(type)->kind == Type_Pointer) {
-			Type *p = base_type(type);
-			if (is_type_struct(p)) {
-				type = p->Pointer.elem;
-			}
-		}
-		if (is_type_array(type) || is_type_vector(type)) {
-			error_node(arg, "Invalid type for `offset_of_val`");
-			return false;
-		}
-
-		ast_node(i, Ident, s->selector);
-		Selection sel = lookup_field(c->allocator, type, i->string, operand->mode == Addressing_Type);
-		if (sel.entity == NULL) {
-			gbString type_str = type_to_string(type);
-			error_node(arg,
-			      "`%s` has no field named `%.*s`", type_str, LIT(i->string));
-			return false;
-		}
-		if (sel.indirect) {
-			gbString type_str = type_to_string(type);
-			error_node(ce->args.e[0],
-			      "Field `%.*s` is embedded via a pointer in `%s`", LIT(i->string), type_str);
-			gb_string_free(type_str);
-			return false;
-		}
-
-		operand->mode = Addressing_Constant;
-		// IMPORTANT TODO(bill): Fix for anonymous fields
-		operand->value = exact_value_i64(type_offset_of_from_selection(c->allocator, type, sel));
-		operand->type  = t_untyped_integer;
-	} break;
-
-	case BuiltinProc_type_of_val:
-		// type_of_val :: proc(val: Type) -> type(Type)
-		check_assignment(c, operand, NULL, str_lit("argument of `type_of_val`"));
-		if (operand->mode == Addressing_Invalid || operand->mode == Addressing_Builtin) {
-			return false;
-		}
-		if (operand->type == NULL || operand->type == t_invalid) {
-			error_node(operand->expr, "Invalid argument to `type_of_val`");
-			return false;
-		}
-		operand->mode = Addressing_Type;
-		break;
-
-
-	case BuiltinProc_type_info: {
-		// type_info :: proc(Type) -> ^Type_Info
-		if (c->context.scope->is_global) {
-			compiler_error("`type_info` Cannot be declared within a #shared_global_scope due to how the internals of the compiler works");
-		}
-
-		// NOTE(bill): The type information may not be setup yet
-		init_preload(c);
-		AstNode *expr = ce->args.e[0];
-		Type *type = check_type(c, expr);
-		if (type == NULL || type == t_invalid) {
-			error_node(expr, "Invalid argument to `type_info`");
-			return false;
-		}
-
-		add_type_info_type(c, type);
-
-		operand->mode = Addressing_Value;
-		operand->type = t_type_info_ptr;
-	} break;
-
-	case BuiltinProc_type_info_of_val: {
-		// type_info_of_val :: proc(val: Type) -> ^Type_Info
-		if (c->context.scope->is_global) {
-			compiler_error("`type_info` Cannot be declared within a #shared_global_scope due to how the internals of the compiler works");
-		}
-
-		// NOTE(bill): The type information may not be setup yet
-		init_preload(c);
-		AstNode *expr = ce->args.e[0];
-		check_assignment(c, operand, NULL, str_lit("argument of `type_info_of_val`"));
-		if (operand->mode == Addressing_Invalid || operand->mode == Addressing_Builtin)
-			return false;
-		add_type_info_type(c, operand->type);
-
-		operand->mode = Addressing_Value;
-		operand->type = t_type_info_ptr;
-	} break;
-
-	case BuiltinProc_compile_assert:
-		// compile_assert :: proc(cond: bool) -> bool
-
-		if (!is_type_boolean(operand->type) && operand->mode != Addressing_Constant) {
-			gbString str = expr_to_string(ce->args.e[0]);
-			error_node(call, "`%s` is not a constant boolean", str);
-			gb_string_free(str);
-			return false;
-		}
-		if (!operand->value.value_bool) {
-			gbString str = expr_to_string(ce->args.e[0]);
-			error_node(call, "Compile time assertion: `%s`", str);
-			gb_string_free(str);
-		}
-
-		operand->mode = Addressing_Constant;
-		operand->type = t_untyped_bool;
-		break;
-
-	case BuiltinProc_assert:
-		// assert :: proc(cond: bool) -> bool
-
-		if (!is_type_boolean(operand->type)) {
-			gbString str = expr_to_string(ce->args.e[0]);
-			error_node(call, "`%s` is not a boolean", str);
-			gb_string_free(str);
-			return false;
-		}
-
-		operand->mode = Addressing_Value;
-		operand->type = t_untyped_bool;
-		break;
-
-	case BuiltinProc_panic:
-		// panic :: proc(msg: string)
-
-		if (!is_type_string(operand->type)) {
-			gbString str = expr_to_string(ce->args.e[0]);
-			error_node(call, "`%s` is not a string", str);
-			gb_string_free(str);
-			return false;
-		}
-
-		operand->mode = Addressing_NoValue;
-		break;
-
-	case BuiltinProc_copy: {
-		// copy :: proc(x, y: []Type) -> int
-		Type *dest_type = NULL, *src_type = NULL;
-
-		Type *d = base_type(operand->type);
-		if (d->kind == Type_Slice) {
-			dest_type = d->Slice.elem;
-		}
-		Operand op = {0};
-		check_expr(c, &op, ce->args.e[1]);
-		if (op.mode == Addressing_Invalid) {
-			return false;
-		}
-		Type *s = base_type(op.type);
-		if (s->kind == Type_Slice) {
-			src_type = s->Slice.elem;
-		}
-
-		if (dest_type == NULL || src_type == NULL) {
-			error_node(call, "`copy` only expects slices as arguments");
-			return false;
-		}
-
-		if (!are_types_identical(dest_type, src_type)) {
-			gbString d_arg = expr_to_string(ce->args.e[0]);
-			gbString s_arg = expr_to_string(ce->args.e[1]);
-			gbString d_str = type_to_string(dest_type);
-			gbString s_str = type_to_string(src_type);
-			error_node(call,
-			      "Arguments to `copy`, %s, %s, have different elem types: %s vs %s",
-			      d_arg, s_arg, d_str, s_str);
-			gb_string_free(s_str);
-			gb_string_free(d_str);
-			gb_string_free(s_arg);
-			gb_string_free(d_arg);
-			return false;
-		}
-
-		operand->type = t_int; // Returns number of elems copied
-		operand->mode = Addressing_Value;
-	} break;
-
-	case BuiltinProc_swizzle: {
-		// swizzle :: proc(v: {N}T, T..) -> {M}T
-		Type *vector_type = base_type(operand->type);
-		if (!is_type_vector(vector_type)) {
-			gbString type_str = type_to_string(operand->type);
-			error_node(call,
-			      "You can only `swizzle` a vector, got `%s`",
-			      type_str);
-			gb_string_free(type_str);
-			return false;
-		}
-
-		isize max_count = vector_type->Vector.count;
-		i128 max_count128 = i128_from_i64(max_count);
-		isize arg_count = 0;
-		for_array(i, ce->args) {
-			if (i == 0) {
-				continue;
-			}
-			AstNode *arg = ce->args.e[i];
-			Operand op = {0};
-			check_expr(c, &op, arg);
-			if (op.mode == Addressing_Invalid) {
-				return false;
-			}
-			Type *arg_type = base_type(op.type);
-			if (!is_type_integer(arg_type) || op.mode != Addressing_Constant) {
-				error_node(op.expr, "Indices to `swizzle` must be constant integers");
-				return false;
-			}
-
-			if (i128_lt(op.value.value_integer, I128_ZERO)) {
-				error_node(op.expr, "Negative `swizzle` index");
-				return false;
-			}
-
-			if (i128_le(max_count128, op.value.value_integer)) {
-				error_node(op.expr, "`swizzle` index exceeds vector length");
-				return false;
-			}
-
-			arg_count++;
-		}
-
-		if (arg_count > max_count) {
-			error_node(call, "Too many `swizzle` indices, %td > %td", arg_count, max_count);
-			return false;
-		}
-
-		Type *elem_type = vector_type->Vector.elem;
-		operand->type = make_type_vector(c->allocator, elem_type, arg_count);
-		operand->mode = Addressing_Value;
-	} break;
-
-	case BuiltinProc_complex: {
-		// complex :: proc(real, imag: float_type) -> complex_type
-		Operand x = *operand;
-		Operand y = {0};
-
-		// NOTE(bill): Invalid will be the default till fixed
-		operand->type = t_invalid;
-		operand->mode = Addressing_Invalid;
-
-		check_expr(c, &y, ce->args.e[1]);
-		if (y.mode == Addressing_Invalid) {
-			return false;
-		}
-
-		convert_to_typed(c, &x, y.type, 0); if (x.mode == Addressing_Invalid) return false;
-		convert_to_typed(c, &y, x.type, 0); if (y.mode == Addressing_Invalid) return false;
-		if (x.mode == Addressing_Constant &&
-		    y.mode == Addressing_Constant) {
-			if (is_type_numeric(x.type) && exact_value_imag(x.value).value_float == 0) {
-				x.type = t_untyped_float;
-			}
-			if (is_type_numeric(y.type) && exact_value_imag(y.value).value_float == 0) {
-				y.type = t_untyped_float;
-			}
-		}
-
-		if (!are_types_identical(x.type, y.type)) {
-			gbString tx = type_to_string(x.type);
-			gbString ty = type_to_string(y.type);
-			error_node(call, "Mismatched types to `complex`, `%s` vs `%s`", tx, ty);
-			gb_string_free(ty);
-			gb_string_free(tx);
-			return false;
-		}
-
-		if (!is_type_float(x.type)) {
-			gbString s = type_to_string(x.type);
-			error_node(call, "Arguments have type `%s`, expected a floating point", s);
-			gb_string_free(s);
-			return false;
-		}
-
-		if (x.mode == Addressing_Constant && y.mode == Addressing_Constant) {
-			operand->value = exact_binary_operator_value(Token_Add, x.value, y.value);
-			operand->mode = Addressing_Constant;
-		} else {
-			operand->mode = Addressing_Value;
-		}
-
-		BasicKind kind = core_type(x.type)->Basic.kind;
-		switch (kind) {
-		// case Basic_f16:          operand->type = t_complex32;       break;
-		case Basic_f32:          operand->type = t_complex64;       break;
-		case Basic_f64:          operand->type = t_complex128;      break;
-		case Basic_UntypedFloat: operand->type = t_untyped_complex; break;
-		default: GB_PANIC("Invalid type"); break;
-		}
-	} break;
-
-	case BuiltinProc_real:
-	case BuiltinProc_imag: {
-		// real :: proc(x: type) -> float_type
-		// imag :: proc(x: type) -> float_type
-
-		Operand *x = operand;
-		if (is_type_untyped(x->type)) {
-			if (x->mode == Addressing_Constant) {
-				if (is_type_numeric(x->type)) {
-					x->type = t_untyped_complex;
-				}
-			} else {
-				convert_to_typed(c, x, t_complex128, 0);
-				if (x->mode == Addressing_Invalid) {
-					return false;
-				}
-			}
-		}
-
-		if (!is_type_complex(x->type)) {
-			gbString s = type_to_string(x->type);
-			error_node(call, "Argument has type `%s`, expected a complex type", s);
-			gb_string_free(s);
-			return false;
-		}
-
-		if (x->mode == Addressing_Constant) {
-			switch (id) {
-			case BuiltinProc_real: x->value = exact_value_real(x->value); break;
-			case BuiltinProc_imag: x->value = exact_value_imag(x->value); break;
-			}
-		} else {
-			x->mode = Addressing_Value;
-		}
-
-		BasicKind kind = core_type(x->type)->Basic.kind;
-		switch (kind) {
-		case Basic_complex64:         x->type = t_f32;           break;
-		case Basic_complex128:        x->type = t_f64;           break;
-		case Basic_UntypedComplex:    x->type = t_untyped_float; break;
-		default: GB_PANIC("Invalid type"); break;
-		}
-	} break;
-
-	case BuiltinProc_conj: {
-		// conj :: proc(x: type) -> type
-		Operand *x = operand;
-		if (is_type_complex(x->type)) {
-			if (x->mode == Addressing_Constant) {
-				ExactValue v = exact_value_to_complex(x->value);
-				f64 r = v.value_complex.real;
-				f64 i = v.value_complex.imag;
-				x->value = exact_value_complex(r, i);
-				x->mode = Addressing_Constant;
-			} else {
-				x->mode = Addressing_Value;
-			}
-		} else {
-			gbString s = type_to_string(x->type);
-			error_node(call, "Expected a complex or quaternion, got `%s`", s);
-			gb_string_free(s);
-			return false;
-		}
-
-	} break;
-
-	case BuiltinProc_slice_ptr: {
-		// slice_ptr :: proc(a: ^T, len: int) -> []T
-		// slice_ptr :: proc(a: ^T, len, cap: int) -> []T
-		// ^T cannot be rawptr
-		Type *ptr_type = base_type(operand->type);
-		if (!is_type_pointer(ptr_type)) {
-			gbString type_str = type_to_string(operand->type);
-			error_node(call, "Expected a pointer to `slice_ptr`, got `%s`", type_str);
-			gb_string_free(type_str);
-			return false;
-		}
-
-		if (ptr_type == t_rawptr) {
-			error_node(call, "`rawptr` cannot have pointer arithmetic");
-			return false;
-		}
-
-		isize arg_count = ce->args.count;
-		if (arg_count < 2 || 3 < arg_count) {
-			error_node(ce->args.e[0], "`slice_ptr` expects 2 or 3 arguments, found %td", arg_count);
-			// NOTE(bill): Return the correct type to reduce errors
-		} else {
-			// If any are constant
-			i64 sizes[2] = {0};
-			isize size_count = 0;
-			for (isize i = 1; i < arg_count; i++) {
-				i64 val = 0;
-				bool ok = check_index_value(c, false, ce->args.e[i], -1, &val);
-				if (ok && val >= 0) {
-					GB_ASSERT(size_count < gb_count_of(sizes));
-					sizes[size_count++] = val;
-				}
-			}
-
-			if (size_count == 2 && sizes[0] > sizes[1]) {
-				error_node(ce->args.e[1], "`slice_ptr` count and capacity are swapped");
-				// No need quit
-			}
-		}
-		operand->type = make_type_slice(c->allocator, ptr_type->Pointer.elem);
-		operand->mode = Addressing_Value;
-	} break;
-
-	case BuiltinProc_slice_to_bytes: {
-		// slice_to_bytes :: proc(a: []T) -> []u8
-		Type *slice_type = base_type(operand->type);
-		if (!is_type_slice(slice_type)) {
-			gbString type_str = type_to_string(operand->type);
-			error_node(call, "Expected a slice type, got `%s`", type_str);
-			gb_string_free(type_str);
-			return false;
-		}
-
-		operand->type = t_u8_slice;
-		operand->mode = Addressing_Value;
-	} break;
-
-	case BuiltinProc_min: {
-		// min :: proc(a, b: ordered) -> ordered
-		Type *type = base_type(operand->type);
-		if (!is_type_ordered(type) || !(is_type_numeric(type) || is_type_string(type))) {
-			gbString type_str = type_to_string(operand->type);
-			error_node(call, "Expected a ordered numeric type to `min`, got `%s`", type_str);
-			gb_string_free(type_str);
-			return false;
-		}
-
-		AstNode *other_arg = ce->args.e[1];
-		Operand a = *operand;
-		Operand b = {0};
-		check_expr(c, &b, other_arg);
-		if (b.mode == Addressing_Invalid) {
-			return false;
-		}
-		if (!is_type_ordered(b.type) || !(is_type_numeric(b.type) || is_type_string(b.type))) {
-			gbString type_str = type_to_string(b.type);
-			error_node(call,
-			      "Expected a ordered numeric type to `min`, got `%s`",
-			      type_str);
-			gb_string_free(type_str);
-			return false;
-		}
-
-		if (a.mode == Addressing_Constant &&
-		    b.mode == Addressing_Constant) {
-			ExactValue x = a.value;
-			ExactValue y = b.value;
-
-			operand->mode = Addressing_Constant;
-			if (compare_exact_values(Token_Lt, x, y)) {
-				operand->value = x;
-				operand->type = a.type;
-			} else {
-				operand->value = y;
-				operand->type = b.type;
-			}
-		} else {
-			operand->mode = Addressing_Value;
-			operand->type = type;
-
-			convert_to_typed(c, &a, b.type, 0);
-			if (a.mode == Addressing_Invalid) {
-				return false;
-			}
-			convert_to_typed(c, &b, a.type, 0);
-			if (b.mode == Addressing_Invalid) {
-				return false;
-			}
-
-			if (!are_types_identical(a.type, b.type)) {
-				gbString type_a = type_to_string(a.type);
-				gbString type_b = type_to_string(b.type);
-				error_node(call,
-				      "Mismatched types to `min`, `%s` vs `%s`",
-				      type_a, type_b);
-				gb_string_free(type_b);
-				gb_string_free(type_a);
-				return false;
-			}
-		}
-
-	} break;
-
-	case BuiltinProc_max: {
-		// min :: proc(a, b: ordered) -> ordered
-		Type *type = base_type(operand->type);
-		if (!is_type_ordered(type) || !(is_type_numeric(type) || is_type_string(type))) {
-			gbString type_str = type_to_string(operand->type);
-			error_node(call,
-			      "Expected a ordered numeric or string type to `max`, got `%s`",
-			      type_str);
-			gb_string_free(type_str);
-			return false;
-		}
-
-		AstNode *other_arg = ce->args.e[1];
-		Operand a = *operand;
-		Operand b = {0};
-		check_expr(c, &b, other_arg);
-		if (b.mode == Addressing_Invalid) {
-			return false;
-		}
-		if (!is_type_ordered(b.type) || !(is_type_numeric(b.type) || is_type_string(b.type))) {
-			gbString type_str = type_to_string(b.type);
-			error_node(call,
-			      "Expected a ordered numeric or string type to `max`, got `%s`",
-			      type_str);
-			gb_string_free(type_str);
-			return false;
-		}
-
-		if (a.mode == Addressing_Constant &&
-		    b.mode == Addressing_Constant) {
-			ExactValue x = a.value;
-			ExactValue y = b.value;
-
-			operand->mode = Addressing_Constant;
-			if (compare_exact_values(Token_Gt, x, y)) {
-				operand->value = x;
-				operand->type = a.type;
-			} else {
-				operand->value = y;
-				operand->type = b.type;
-			}
-		} else {
-			operand->mode = Addressing_Value;
-			operand->type = type;
-
-			convert_to_typed(c, &a, b.type, 0);
-			if (a.mode == Addressing_Invalid) {
-				return false;
-			}
-			convert_to_typed(c, &b, a.type, 0);
-			if (b.mode == Addressing_Invalid) {
-				return false;
-			}
-
-			if (!are_types_identical(a.type, b.type)) {
-				gbString type_a = type_to_string(a.type);
-				gbString type_b = type_to_string(b.type);
-				error_node(call,
-				      "Mismatched types to `max`, `%s` vs `%s`",
-				      type_a, type_b);
-				gb_string_free(type_b);
-				gb_string_free(type_a);
-				return false;
-			}
-		}
-
-	} break;
-
-	case BuiltinProc_abs: {
-		// abs :: proc(n: numeric) -> numeric
-		if (!is_type_numeric(operand->type) && !is_type_vector(operand->type)) {
-			gbString type_str = type_to_string(operand->type);
-			error_node(call, "Expected a numeric type to `abs`, got `%s`", type_str);
-			gb_string_free(type_str);
-			return false;
-		}
-
-		if (operand->mode == Addressing_Constant) {
-			switch (operand->value.kind) {
-			case ExactValue_Integer:
-				operand->value.value_integer = i128_abs(operand->value.value_integer);
-				break;
-			case ExactValue_Float:
-				operand->value.value_float = gb_abs(operand->value.value_float);
-				break;
-			case ExactValue_Complex: {
-				f64 r = operand->value.value_complex.real;
-				f64 i = operand->value.value_complex.imag;
-				operand->value = exact_value_float(gb_sqrt(r*r + i*i));
-			} break;
-			default:
-				GB_PANIC("Invalid numeric constant");
-				break;
-			}
-		} else {
-			operand->mode = Addressing_Value;
-		}
-
-		if (is_type_complex(operand->type)) {
-			operand->type = base_complex_elem_type(operand->type);
-		}
-		GB_ASSERT(!is_type_complex(operand->type));
-	} break;
-
-	case BuiltinProc_clamp: {
-		// clamp :: proc(a, min, max: ordered) -> ordered
-		Type *type = base_type(operand->type);
-		if (!is_type_ordered(type) || !(is_type_numeric(type) || is_type_string(type))) {
-			gbString type_str = type_to_string(operand->type);
-			error_node(call, "Expected a ordered numeric or string type to `clamp`, got `%s`", type_str);
-			gb_string_free(type_str);
-			return false;
-		}
-
-		AstNode *min_arg = ce->args.e[1];
-		AstNode *max_arg = ce->args.e[2];
-		Operand x = *operand;
-		Operand y = {0};
-		Operand z = {0};
-
-		check_expr(c, &y, min_arg);
-		if (y.mode == Addressing_Invalid) {
-			return false;
-		}
-		if (!is_type_ordered(y.type) || !(is_type_numeric(y.type) || is_type_string(y.type))) {
-			gbString type_str = type_to_string(y.type);
-			error_node(call, "Expected a ordered numeric or string type to `clamp`, got `%s`", type_str);
-			gb_string_free(type_str);
-			return false;
-		}
-
-		check_expr(c, &z, max_arg);
-		if (z.mode == Addressing_Invalid) {
-			return false;
-		}
-		if (!is_type_ordered(z.type) || !(is_type_numeric(z.type) || is_type_string(z.type))) {
-			gbString type_str = type_to_string(z.type);
-			error_node(call, "Expected a ordered numeric or string type to `clamp`, got `%s`", type_str);
-			gb_string_free(type_str);
-			return false;
-		}
-
-		if (x.mode == Addressing_Constant &&
-		    y.mode == Addressing_Constant &&
-		    z.mode == Addressing_Constant) {
-			ExactValue a = x.value;
-			ExactValue b = y.value;
-			ExactValue c = z.value;
-
-			operand->mode = Addressing_Constant;
-			if (compare_exact_values(Token_Lt, a, b)) {
-				operand->value = b;
-				operand->type = y.type;
-			} else if (compare_exact_values(Token_Gt, a, c)) {
-				operand->value = c;
-				operand->type = z.type;
-			} else {
-				operand->value = a;
-				operand->type = x.type;
-			}
-		} else {
-			operand->mode = Addressing_Value;
-			operand->type = type;
-
-			convert_to_typed(c, &x, y.type, 0);
-			if (x.mode == Addressing_Invalid) { return false; }
-			convert_to_typed(c, &y, x.type, 0);
-			if (y.mode == Addressing_Invalid) { return false; }
-			convert_to_typed(c, &x, z.type, 0);
-			if (x.mode == Addressing_Invalid) { return false; }
-			convert_to_typed(c, &z, x.type, 0);
-			if (z.mode == Addressing_Invalid) { return false; }
-			convert_to_typed(c, &y, z.type, 0);
-			if (y.mode == Addressing_Invalid) { return false; }
-			convert_to_typed(c, &z, y.type, 0);
-			if (z.mode == Addressing_Invalid) { return false; }
-
-			if (!are_types_identical(x.type, y.type) || !are_types_identical(x.type, z.type)) {
-				gbString type_x = type_to_string(x.type);
-				gbString type_y = type_to_string(y.type);
-				gbString type_z = type_to_string(z.type);
-				error_node(call,
-				      "Mismatched types to `clamp`, `%s`, `%s`, `%s`",
-				      type_x, type_y, type_z);
-				gb_string_free(type_z);
-				gb_string_free(type_y);
-				gb_string_free(type_x);
-				return false;
-			}
-		}
-	} break;
-
-	case BuiltinProc_transmute: {
-		Operand op = {0};
-		check_expr_or_type(c, &op, ce->args.e[0]);
-		Type *t = op.type;
-		if ((op.mode != Addressing_Type && t == NULL) || t == t_invalid) {
-			error_node(ce->args.e[0], "Expected a type for `transmute`");
-			return false;
-		}
-		AstNode *expr = ce->args.e[1];
-		Operand *o = operand;
-		check_expr(c, o, expr);
-		if (o->mode == Addressing_Invalid) {
-			return false;
-		}
-
-		if (o->mode == Addressing_Constant) {
-			gbString expr_str = expr_to_string(o->expr);
-			error_node(o->expr, "Cannot transmute a constant expression: `%s`", expr_str);
-			gb_string_free(expr_str);
-			o->mode = Addressing_Invalid;
-			o->expr = expr;
-			return false;
-		}
-
-		if (is_type_untyped(o->type)) {
-			gbString expr_str = expr_to_string(o->expr);
-			error_node(o->expr, "Cannot transmute untyped expression: `%s`", expr_str);
-			gb_string_free(expr_str);
-			o->mode = Addressing_Invalid;
-			o->expr = expr;
-			return false;
-		}
-
-		i64 srcz = type_size_of(c->allocator, o->type);
-		i64 dstz = type_size_of(c->allocator, t);
-		if (srcz != dstz) {
-			gbString expr_str = expr_to_string(o->expr);
-			gbString type_str = type_to_string(t);
-			error_node(o->expr, "Cannot transmute `%s` to `%s`, %lld vs %lld bytes", expr_str, type_str, srcz, dstz);
-			gb_string_free(type_str);
-			gb_string_free(expr_str);
-			o->mode = Addressing_Invalid;
-			o->expr = expr;
-			return false;
-		}
-
-		o->mode = Addressing_Value;
-		o->type = t;
-	} break;
-	}
-
-	return true;
-}
-
-typedef enum CallArgumentError {
-	CallArgumentError_None,
-	CallArgumentError_WrongTypes,
-	CallArgumentError_NonVariadicExpand,
-	CallArgumentError_VariadicTuple,
-	CallArgumentError_MultipleVariadicExpand,
-	CallArgumentError_ArgumentCount,
-	CallArgumentError_TooFewArguments,
-	CallArgumentError_TooManyArguments,
-} CallArgumentError;
-
-typedef enum CallArgumentErrorMode {
-	CallArgumentMode_NoErrors,
-	CallArgumentMode_ShowErrors,
-} CallArgumentErrorMode;
-
-CallArgumentError check_call_arguments_internal(Checker *c, AstNode *call, Type *proc_type, Operand *operands, isize operand_count,
-                                                CallArgumentErrorMode show_error_mode, i64 *score_) {
-	ast_node(ce, CallExpr, call);
-	isize param_count = 0;
-	bool variadic = proc_type->Proc.variadic;
-	bool vari_expand = (ce->ellipsis.pos.line != 0);
-	i64 score = 0;
-	bool show_error = show_error_mode == CallArgumentMode_ShowErrors;
-
-	if (proc_type->Proc.params != NULL) {
-		param_count = proc_type->Proc.params->Tuple.variable_count;
-		if (variadic) {
-			param_count--;
-		}
-	}
-
-	if (vari_expand && !variadic) {
-		if (show_error) {
-			error(ce->ellipsis,
-			      "Cannot use `..` in call to a non-variadic procedure: `%.*s`",
-			      LIT(ce->proc->Ident.string));
-		}
-		if (score_) *score_ = score;
-		return CallArgumentError_NonVariadicExpand;
-	}
-
-	if (operand_count == 0 && param_count == 0) {
-		if (score_) *score_ = score;
-		return CallArgumentError_None;
-	}
-
-	i32 error_code = 0;
-	if (operand_count < param_count) {
-		error_code = -1;
-	} else if (!variadic && operand_count > param_count) {
-		error_code = +1;
-	}
-	if (error_code != 0) {
-		CallArgumentError err = CallArgumentError_TooManyArguments;
-		char *err_fmt = "Too many arguments for `%s`, expected %td arguments";
-		if (error_code < 0) {
-			err = CallArgumentError_TooFewArguments;
-			err_fmt = "Too few arguments for `%s`, expected %td arguments";
-		}
-
-		if (show_error) {
-			gbString proc_str = expr_to_string(ce->proc);
-			error_node(call, err_fmt, proc_str, param_count);
-			gb_string_free(proc_str);
-		}
-		if (score_) *score_ = score;
-		return err;
-	}
-
-	bool err = CallArgumentError_None;
-
-	GB_ASSERT(proc_type->Proc.params != NULL);
-	Entity **sig_params = proc_type->Proc.params->Tuple.variables;
-	isize operand_index = 0;
-	for (; operand_index < param_count; operand_index++) {
-		Type *t = sig_params[operand_index]->type;
-		Operand o = operands[operand_index];
-		if (variadic) {
-			o = operands[operand_index];
-		}
-		i64 s = 0;
-		if (!check_is_assignable_to_with_score(c, &o, t, &s)) {
-			if (show_error) {
-				check_assignment(c, &o, t, str_lit("argument"));
-			}
-			err = CallArgumentError_WrongTypes;
-		}
-		score += s;
-	}
-
-	if (variadic) {
-		bool variadic_expand = false;
-		Type *slice = sig_params[param_count]->type;
-		GB_ASSERT(is_type_slice(slice));
-		Type *elem = base_type(slice)->Slice.elem;
-		Type *t = elem;
-		for (; operand_index < operand_count; operand_index++) {
-			Operand o = operands[operand_index];
-			if (vari_expand) {
-				variadic_expand = true;
-				t = slice;
-				if (operand_index != param_count) {
-					if (show_error) {
-						error_node(o.expr, "`..` in a variadic procedure can only have one variadic argument at the end");
-					}
-					if (score_) *score_ = score;
-					return CallArgumentError_MultipleVariadicExpand;
-				}
-			}
-			i64 s = 0;
-			if (!check_is_assignable_to_with_score(c, &o, t, &s)) {
-				if (show_error) {
-					check_assignment(c, &o, t, str_lit("argument"));
-				}
-				err = CallArgumentError_WrongTypes;
-			}
-			score += s;
-		}
-	}
-
-	if (score_) *score_ = score;
-	return err;
-}
-
-typedef struct ValidProcAndScore {
-	isize index;
-	i64   score;
-} ValidProcAndScore;
-
-int valid_proc_and_score_cmp(void const *a, void const *b) {
-	i64 si = (cast(ValidProcAndScore const *)a)->score;
-	i64 sj = (cast(ValidProcAndScore const *)b)->score;
-	return sj < si ? -1 : sj > si;
-}
-
-typedef Array(Operand) ArrayOperand;
-
-bool check_unpack_arguments(Checker *c, isize lhs_count, ArrayOperand *operands, AstNodeArray rhs, bool allow_ok) {
-	bool optional_ok = false;
-	for_array(i, rhs) {
-		Operand o = {0};
-		check_multi_expr(c, &o, rhs.e[i]);
-
-		if (o.type == NULL || o.type->kind != Type_Tuple) {
-			if (allow_ok && lhs_count == 2 && rhs.count == 1 &&
-			    (o.mode == Addressing_MapIndex || o.mode == Addressing_OptionalOk)) {
-				Type *tuple = make_optional_ok_type(c->allocator, o.type);
-				add_type_and_value(&c->info, o.expr, o.mode, tuple, o.value);
-
-				Operand val = o;
-				Operand ok = o;
-				val.mode = Addressing_Value;
-				ok.mode  = Addressing_Value;
-				ok.type  = t_bool;
-				array_add(operands, val);
-				array_add(operands, ok);
-
-				optional_ok = true;
-			} else {
-				array_add(operands, o);
-			}
-		} else {
-			TypeTuple *tuple = &o.type->Tuple;
-			for (isize j = 0; j < tuple->variable_count; j++) {
-				o.type = tuple->variables[j]->type;
-				array_add(operands, o);
-			}
-		}
-	}
-
-	return optional_ok;
-}
-
-Type *check_call_arguments(Checker *c, Operand *operand, Type *proc_type, AstNode *call) {
-	GB_ASSERT(call->kind == AstNode_CallExpr);
-
-	ast_node(ce, CallExpr, call);
-
-	ArrayOperand operands;
-	array_init_reserve(&operands, heap_allocator(), 2*ce->args.count);
-	check_unpack_arguments(c, -1, &operands, ce->args, false);
-
-	if (operand->mode == Addressing_Overload) {
-		GB_ASSERT(operand->overload_entities != NULL &&
-		          operand->overload_count > 0);
-
-		isize              overload_count = operand->overload_count;
-		Entity **          procs          = operand->overload_entities;
-		ValidProcAndScore *valids         = gb_alloc_array(heap_allocator(), ValidProcAndScore, overload_count);
-		isize              valid_count    = 0;
-
-		String name = procs[0]->token.string;
-
-		for (isize i = 0; i < overload_count; i++) {
-			Entity *e = procs[i];
-			DeclInfo **found = map_decl_info_get(&c->info.entities, hash_pointer(e));
-			GB_ASSERT(found != NULL);
-			DeclInfo *d = *found;
-			check_entity_decl(c, e, d, NULL);
-		}
-
-		for (isize i = 0; i < overload_count; i++) {
-			Entity *p = procs[i];
-			Type *proc_type = base_type(p->type);
-			if (proc_type != NULL && is_type_proc(proc_type)) {
-				i64 score = 0;
-				CallArgumentError err = check_call_arguments_internal(c, call, proc_type, operands.e, operands.count, CallArgumentMode_NoErrors, &score);
-				if (err == CallArgumentError_None) {
-					valids[valid_count].index = i;
-					valids[valid_count].score = score;
-					valid_count++;
-				}
-			}
-		}
-
-		if (valid_count > 1) {
-			gb_sort_array(valids, valid_count, valid_proc_and_score_cmp);
-			i64 best_score = valids[0].score;
-			for (isize i = 0; i < valid_count; i++) {
-				if (best_score > valids[i].score) {
-					valid_count = i;
-					break;
-				}
-				best_score = valids[i].score;
-			}
-		}
-
-
-		if (valid_count == 0) {
-			error_node(operand->expr, "No overloads for `%.*s` that match with the given arguments", LIT(name));
-			proc_type = t_invalid;
-		} else if (valid_count > 1) {
-			error_node(operand->expr, "Ambiguous procedure call `%.*s`, could be:", LIT(name));
-			for (isize i = 0; i < valid_count; i++) {
-				Entity *proc = procs[valids[i].index];
-				TokenPos pos = proc->token.pos;
-				gbString pt = type_to_string(proc->type);
-				gb_printf_err("\t%.*s :: %s at %.*s(%td:%td)\n", LIT(name), pt, LIT(pos.file), pos.line, pos.column);
-				gb_string_free(pt);
-			}
-			proc_type = t_invalid;
-		} else {
-			AstNode *expr = operand->expr;
-			while (expr->kind == AstNode_SelectorExpr) {
-				expr = expr->SelectorExpr.selector;
-			}
-			GB_ASSERT(expr->kind == AstNode_Ident);
-			Entity *e = procs[valids[0].index];
-			add_entity_use(c, expr, e);
-			proc_type = e->type;
-			i64 score = 0;
-			CallArgumentError err = check_call_arguments_internal(c, call, proc_type, operands.e, operands.count, CallArgumentMode_ShowErrors, &score);
-		}
-
-		gb_free(heap_allocator(), valids);
-		gb_free(heap_allocator(), procs);
-	} else {
-		i64 score = 0;
-		CallArgumentError err = check_call_arguments_internal(c, call, proc_type, operands.e, operands.count, CallArgumentMode_ShowErrors, &score);
-		array_free(&operands);
-	}
-	return proc_type;
-}
-
-
-Entity *find_using_index_expr(Type *t) {
-	t = base_type(t);
-	if (t->kind != Type_Record) {
-		return NULL;
-	}
-
-	for (isize i = 0; i < t->Record.field_count; i++) {
-		Entity *f = t->Record.fields[i];
-		if (f->kind == Entity_Variable &&
-		    (f->flags & EntityFlag_Field) != 0 &&
-		    (f->flags & EntityFlag_Using) != 0) {
-			if (is_type_indexable(f->type)) {
-				return f;
-			}
-			Entity *res = find_using_index_expr(f->type);
-			if (res != NULL) {
-				return res;
-			}
-		}
-	}
-	return NULL;
-}
-
-ExprKind check_call_expr(Checker *c, Operand *operand, AstNode *call) {
-	GB_ASSERT(call->kind == AstNode_CallExpr);
-	ast_node(ce, CallExpr, call);
-	check_expr_or_type(c, operand, ce->proc);
-
-	if (operand->mode == Addressing_Invalid) {
-		for_array(i, ce->args) {
-			check_expr_base(c, operand, ce->args.e[i], NULL);
-		}
-		operand->mode = Addressing_Invalid;
-		operand->expr = call;
-		return Expr_Stmt;
-	}
-
-	if (operand->mode == Addressing_Type) {
-		Type *t = operand->type;
-		gbString str = type_to_string(t);
-		operand->mode = Addressing_Invalid;
-		isize arg_count = ce->args.count;
-		switch (arg_count) {
-		case 0:  error_node(call, "Missing argument in convertion to `%s`", str);   break;
-		default: error_node(call, "Too many arguments in convertion to `%s`", str); break;
-		case 1:
-			check_expr(c, operand, ce->args.e[0]);
-			if (operand->mode != Addressing_Invalid) {
-				check_cast(c, operand, t);
-			}
-			break;
-		}
-
-		gb_string_free(str);
-		return Expr_Expr;
-	}
-
-	if (operand->mode == Addressing_Builtin) {
-		i32 id = operand->builtin_id;
-		if (!check_builtin_procedure(c, operand, call, id)) {
-			operand->mode = Addressing_Invalid;
-		}
-		operand->expr = call;
-		return builtin_procs[id].kind;
-	}
-
-	Type *proc_type = base_type(operand->type);
-	if (operand->mode != Addressing_Overload) {
-		bool valid_type = (proc_type != NULL) && is_type_proc(proc_type);
-		bool valid_mode = is_operand_value(*operand);
-		if (!valid_type || !valid_mode) {
-			AstNode *e = operand->expr;
-			gbString str = expr_to_string(e);
-			gbString type_str = type_to_string(operand->type);
-			error_node(e, "Cannot call a non-procedure: `%s` of type `%s`", str, type_str);
-			gb_string_free(type_str);
-			gb_string_free(str);
-
-			operand->mode = Addressing_Invalid;
-			operand->expr = call;
-
-			return Expr_Stmt;
-		}
-	}
-
-	proc_type = check_call_arguments(c, operand, proc_type, call);
-
-	gb_zero_item(operand);
-
-	Type *pt = base_type(proc_type);
-	if (pt == NULL || !is_type_proc(pt)) {
-		operand->mode = Addressing_Invalid;
-		operand->type = t_invalid;
-		operand->expr = call;
-		return Expr_Stmt;
-	}
-	switch (pt->Proc.result_count) {
-	case 0:
-		operand->mode = Addressing_NoValue;
-		break;
-	case 1:
-		operand->mode = Addressing_Value;
-		operand->type = pt->Proc.results->Tuple.variables[0]->type;
-		break;
-	default:
-		operand->mode = Addressing_Value;
-		operand->type = pt->Proc.results;
-		break;
-	}
-
-	operand->expr = call;
-	return Expr_Expr;
-}
-
-
-ExprKind check_macro_call_expr(Checker *c, Operand *operand, AstNode *call) {
-	GB_ASSERT(call->kind == AstNode_MacroCallExpr);
-	ast_node(mce, MacroCallExpr, call);
-
-	error_node(call, "Macro call expressions are not yet supported");
-	operand->mode = Addressing_Invalid;
-	operand->expr = call;
-	return Expr_Stmt;
-}
-
-void check_expr_with_type_hint(Checker *c, Operand *o, AstNode *e, Type *t) {
-	check_expr_base(c, o, e, t);
-	check_not_tuple(c, o);
-	char *err_str = NULL;
-	switch (o->mode) {
-	case Addressing_NoValue:
-		err_str = "used as a value";
-		break;
-	case Addressing_Type:
-		err_str = "is not an expression";
-		break;
-	case Addressing_Builtin:
-		err_str = "must be called";
-		break;
-	}
-	if (err_str != NULL) {
-		gbString str = expr_to_string(e);
-		error_node(e, "`%s` %s", str, err_str);
-		gb_string_free(str);
-		o->mode = Addressing_Invalid;
-	}
-}
-
-void check_set_mode_with_indirection(Operand *o, bool indirection) {
-	if (o->mode != Addressing_Immutable) {
-		if (indirection) {
-			o->mode = Addressing_Variable;
-		} else if (o->mode != Addressing_Variable &&
-		           o->mode != Addressing_Constant) {
-			o->mode = Addressing_Value;
-		}
-	}
-}
-
-bool check_set_index_data(Operand *o, Type *type, bool indirection, i64 *max_count) {
-	Type *t = base_type(type_deref(type));
-
-	switch (t->kind) {
-	case Type_Basic:
-		if (is_type_string(t)) {
-			if (o->mode == Addressing_Constant) {
-				*max_count = o->value.value_string.len;
-			}
-			check_set_mode_with_indirection(o, indirection);
-			o->type = t_u8;
-			return true;
-		}
-		break;
-
-	case Type_Array:
-		*max_count = t->Array.count;
-		check_set_mode_with_indirection(o, indirection);
-		o->type = t->Array.elem;
-		return true;
-
-	case Type_Vector:
-		*max_count = t->Vector.count;
-		check_set_mode_with_indirection(o, indirection);
-		o->type = t->Vector.elem;
-		return true;
-
-
-	case Type_Slice:
-		o->type = t->Slice.elem;
-		if (o->mode != Addressing_Immutable) {
-			o->mode = Addressing_Variable;
-		}
-		return true;
-
-	case Type_DynamicArray:
-		o->type = t->DynamicArray.elem;
-		check_set_mode_with_indirection(o, indirection);
-		return true;
-	}
-
-	return false;
-}
-
-
-ExprKind check_expr_base_internal(Checker *c, Operand *o, AstNode *node, Type *type_hint) {
-	ExprKind kind = Expr_Stmt;
-
-	o->mode = Addressing_Invalid;
-	o->type = t_invalid;
-
-	switch (node->kind) {
-	default:
-		return kind;
-
-	case_ast_node(be, BadExpr, node)
-		return kind;
-	case_end;
-
-	case_ast_node(i, Implicit, node)
-		switch (i->kind) {
-		case Token_context:
-			if (c->context.proc_name.len == 0) {
-				error_node(node, "`context` is only allowed within procedures");
-				return kind;
-			}
-
-			o->mode = Addressing_Value;
-			o->type = t_context;
-			break;
-		default:
-			error_node(node, "Illegal implicit name `%.*s`", LIT(i->string));
-			return kind;
-		}
-	case_end;
-
-	case_ast_node(i, Ident, node);
-		check_ident(c, o, node, NULL, type_hint, false);
-	case_end;
-
-
-	case_ast_node(bl, BasicLit, node);
-		Type *t = t_invalid;
-		switch (bl->kind) {
-		case Token_Integer: t = t_untyped_integer; break;
-		case Token_Float:   t = t_untyped_float;   break;
-		case Token_String:  t = t_untyped_string;  break;
-		case Token_Rune:    t = t_untyped_rune;    break;
-		case Token_Imag: {
-			String s = bl->string;
-			Rune r = s.text[s.len-1];
-			switch (r) {
-			case 'i': t = t_untyped_complex; break;
-			}
-		} break;
-		default:            GB_PANIC("Unknown literal"); break;
-		}
-		o->mode  = Addressing_Constant;
-		o->type  = t;
-		o->value = exact_value_from_basic_literal(*bl);
-	case_end;
-
-	case_ast_node(bd, BasicDirective, node);
-		if (str_eq(bd->name, str_lit("file"))) {
-			o->type = t_untyped_string;
-			o->value = exact_value_string(bd->token.pos.file);
-		} else if (str_eq(bd->name, str_lit("line"))) {
-			o->type = t_untyped_integer;
-			o->value = exact_value_i64(bd->token.pos.line);
-		} else if (str_eq(bd->name, str_lit("procedure"))) {
-			if (c->proc_stack.count == 0) {
-				error_node(node, "#procedure may only be used within procedures");
-				o->type = t_untyped_string;
-				o->value = exact_value_string(str_lit(""));
-			} else {
-				o->type = t_untyped_string;
-				o->value = exact_value_string(c->context.proc_name);
-			}
-
-		} else {
-			GB_PANIC("Unknown basic basic directive");
-		}
-		o->mode = Addressing_Constant;
-	case_end;
-
-	case_ast_node(pl, ProcLit, node);
-		CheckerContext prev_context = c->context;
-		DeclInfo *decl = NULL;
-		Type *type = alloc_type(c->allocator, Type_Proc);
-		check_open_scope(c, pl->type);
-		{
-			decl = make_declaration_info(c->allocator, c->context.scope, c->context.decl);
-			decl->proc_lit = pl->type;
-			c->context.decl = decl;
-
-			if (pl->tags != 0) {
-				error_node(node, "A procedure literal cannot have tags");
-				pl->tags = 0; // TODO(bill): Should I zero this?!
-			}
-
-			check_procedure_type(c, type, pl->type);
-			if (!is_type_proc(type)) {
-				gbString str = expr_to_string(node);
-				error_node(node, "Invalid procedure literal `%s`", str);
-				gb_string_free(str);
-				check_close_scope(c);
-				return kind;
-			}
-			check_procedure_later(c, c->curr_ast_file, empty_token, decl, type, pl->body, pl->tags);
-		}
-		check_close_scope(c);
-
-		c->context = prev_context;
-
-		o->mode = Addressing_Value;
-		o->type = type;
-	case_end;
-
-	case_ast_node(te, TernaryExpr, node);
-		Operand cond = {Addressing_Invalid};
-		check_expr(c, &cond, te->cond);
-		if (cond.mode != Addressing_Invalid && !is_type_boolean(cond.type)) {
-			error_node(te->cond, "Non-boolean condition in if expression");
-		}
-
-		Operand x = {Addressing_Invalid};
-		Operand y = {Addressing_Invalid};
-		check_expr_with_type_hint(c, &x, te->x, type_hint);
-
-		if (te->y != NULL) {
-			check_expr_with_type_hint(c, &y, te->y, type_hint);
-		} else {
-			error_node(node, "A ternary expression must have an else clause");
-			return kind;
-		}
-
-		if (x.type == NULL || x.type == t_invalid ||
-		    y.type == NULL || y.type == t_invalid) {
-			return kind;
-		}
-
-		convert_to_typed(c, &x, y.type, 0);
-		if (x.mode == Addressing_Invalid) {
-			return kind;
-		}
-		convert_to_typed(c, &y, x.type, 0);
-		if (y.mode == Addressing_Invalid) {
-			x.mode = Addressing_Invalid;
-			return kind;
-		}
-
-
-		if (!are_types_identical(x.type, y.type)) {
-			gbString its = type_to_string(x.type);
-			gbString ets = type_to_string(y.type);
-			error_node(node, "Mismatched types in ternary expression, %s vs %s", its, ets);
-			gb_string_free(ets);
-			gb_string_free(its);
-			return kind;
-		}
-
-		o->type = x.type;
-		o->mode = Addressing_Value;
-
-		if (cond.mode == Addressing_Constant && is_type_boolean(cond.type) &&
-		    x.mode == Addressing_Constant &&
-		    y.mode == Addressing_Constant) {
-
-			o->mode = Addressing_Constant;
-
-			if (cond.value.value_bool) {
-				o->value = x.value;
-			} else {
-				o->value = y.value;
-			}
-		}
-
-	case_end;
-
-	case_ast_node(cl, CompoundLit, node);
-		Type *type = type_hint;
-		bool is_to_be_determined_array_count = false;
-		bool is_constant = true;
-		if (cl->type != NULL) {
-			type = NULL;
-
-			// [..]Type
-			if (cl->type->kind == AstNode_ArrayType && cl->type->ArrayType.count != NULL) {
-				AstNode *count = cl->type->ArrayType.count;
-				if (count->kind == AstNode_UnaryExpr &&
-				    count->UnaryExpr.op.kind == Token_Ellipsis) {
-					type = make_type_array(c->allocator, check_type(c, cl->type->ArrayType.elem), -1);
-					is_to_be_determined_array_count = true;
-				}
-			}
-
-			if (type == NULL) {
-				type = check_type(c, cl->type);
-			}
-		}
-
-		if (type == NULL) {
-			error_node(node, "Missing type in compound literal");
-			return kind;
-		}
-
-		Type *t = base_type(type);
-		switch (t->kind) {
-		case Type_Record: {
-			if (!is_type_struct(t) && !is_type_union(t)) {
-				if (cl->elems.count != 0) {
-					gbString type_str = type_to_string(type);
-					error_node(node, "Illegal compound literal type `%s`", type_str);
-					gb_string_free(type_str);
-				}
-				break;
-			}
-			if (is_type_union(t)) {
-				is_constant = false;
-			}
-			if (cl->elems.count == 0) {
-				break; // NOTE(bill): No need to init
-			}
-			{ // Checker values
-				isize field_count = t->Record.field_count;
-				if (cl->elems.e[0]->kind == AstNode_FieldValue) {
-					bool *fields_visited = gb_alloc_array(c->allocator, bool, field_count);
-
-					for_array(i, cl->elems) {
-						AstNode *elem = cl->elems.e[i];
-						if (elem->kind != AstNode_FieldValue) {
-							error_node(elem, "Mixture of `field = value` and value elements in a structure literal is not allowed");
-							continue;
-						}
-						ast_node(fv, FieldValue, elem);
-						if (fv->field->kind != AstNode_Ident) {
-							gbString expr_str = expr_to_string(fv->field);
-							error_node(elem, "Invalid field name `%s` in structure literal", expr_str);
-							gb_string_free(expr_str);
-							continue;
-						}
-						String name = fv->field->Ident.string;
-
-						Selection sel = lookup_field(c->allocator, type, name, o->mode == Addressing_Type);
-						bool is_unknown = sel.entity == NULL;
-						if (is_unknown) {
-							error_node(elem, "Unknown field `%.*s` in structure literal", LIT(name));
-							continue;
-						}
-						if (!is_unknown && !check_is_field_exported(c, sel.entity)) {
-							error_node(elem, "Cannot assign to an unexported field `%.*s` in structure literal", LIT(name));
-							continue;
-						}
-
-
-						if (sel.index.count > 1) {
-							error_node(elem, "Cannot assign to an anonymous field `%.*s` in a structure literal (at the moment)", LIT(name));
-							continue;
-						}
-
-						Entity *field = t->Record.fields[sel.index.e[0]];
-						add_entity_use(c, fv->field, field);
-
-						if (fields_visited[sel.index.e[0]]) {
-							error_node(elem, "Duplicate field `%.*s` in structure literal", LIT(name));
-							continue;
-						}
-
-						fields_visited[sel.index.e[0]] = true;
-						check_expr(c, o, fv->value);
-
-						if (is_type_any(field->type) || is_type_union(field->type) || is_type_raw_union(field->type)) {
-							is_constant = false;
-						}
-						if (is_constant) {
-							is_constant = o->mode == Addressing_Constant;
-						}
-
-
-						check_assignment(c, o, field->type, str_lit("structure literal"));
-					}
-				} else {
-					bool all_fields_are_blank = true;
-					for (isize i = 0; i < t->Record.field_count; i++) {
-						Entity *field = t->Record.fields_in_src_order[i];
-						if (str_ne(field->token.string, str_lit("_"))) {
-							all_fields_are_blank = false;
-							break;
-						}
-					}
-
-					for_array(index, cl->elems) {
-						AstNode *elem = cl->elems.e[index];
-						if (elem->kind == AstNode_FieldValue) {
-							error_node(elem, "Mixture of `field = value` and value elements in a structure literal is not allowed");
-							continue;
-						}
-						if (index >= field_count) {
-							error_node(o->expr, "Too many values in structure literal, expected %td", field_count);
-							break;
-						}
-
-						Entity *field = t->Record.fields_in_src_order[index];
-						if (!all_fields_are_blank && str_eq(field->token.string, str_lit("_"))) {
-							// NOTE(bill): Ignore blank identifiers
-							continue;
-						}
-						check_expr(c, o, elem);
-
-						if (!check_is_field_exported(c, field)) {
-							gbString t = type_to_string(type);
-							error_node(o->expr, "Implicit assignment to an unexported field `%.*s` in `%s` literal",
-							           LIT(field->token.string), t);
-							gb_string_free(t);
-							continue;
-						}
-
-						if (is_type_any(field->type) || is_type_union(field->type) || is_type_raw_union(field->type)) {
-							is_constant = false;
-						}
-						if (is_constant) {
-							is_constant = o->mode == Addressing_Constant;
-						}
-
-						check_assignment(c, o, field->type, str_lit("structure literal"));
-					}
-					if (cl->elems.count < field_count) {
-						error(cl->close, "Too few values in structure literal, expected %td, got %td", field_count, cl->elems.count);
-					}
-				}
-			}
-		} break;
-
-		case Type_Slice:
-		case Type_Array:
-		case Type_Vector:
-		case Type_DynamicArray:
-		{
-			Type *elem_type = NULL;
-			String context_name = {0};
-			i64 max_type_count = -1;
-			if (t->kind == Type_Slice) {
-				elem_type = t->Slice.elem;
-				context_name = str_lit("slice literal");
-			} else if (t->kind == Type_Vector) {
-				elem_type = t->Vector.elem;
-				context_name = str_lit("vector literal");
-				max_type_count = t->Vector.count;
-			} else if (t->kind == Type_Array) {
-				elem_type = t->Array.elem;
-				context_name = str_lit("array literal");
-				max_type_count = t->Array.count;
-			} else if (t->kind == Type_DynamicArray) {
-				elem_type = t->DynamicArray.elem;
-				context_name = str_lit("dynamic array literal");
-				is_constant = false;
-			} else {
-				GB_PANIC("unreachable");
-			}
-
-
-			i64 max = 0;
-			isize index = 0;
-			isize elem_count = cl->elems.count;
-
-			if (is_type_any(base_type(elem_type))) {
-				is_constant = false;
-			}
-
-			for (; index < elem_count; index++) {
-				GB_ASSERT(cl->elems.e != NULL);
-				AstNode *e = cl->elems.e[index];
-				if (e == NULL) {
-					error_node(node, "Invalid literal element");
-					continue;
-				}
-
-				if (e->kind == AstNode_FieldValue) {
-					error_node(e, "`field = value` is only allowed in struct literals");
-					continue;
-				}
-
-				if (0 <= max_type_count && max_type_count <= index) {
-					error_node(e, "Index %lld is out of bounds (>= %lld) for %.*s", index, max_type_count, LIT(context_name));
-				}
-
-				Operand operand = {0};
-				check_expr_with_type_hint(c, &operand, e, elem_type);
-				check_assignment(c, &operand, elem_type, context_name);
-
-				if (is_constant) {
-					is_constant = operand.mode == Addressing_Constant;
-				}
-			}
-			if (max < index) {
-				max = index;
-			}
-
-			if (t->kind == Type_Vector) {
-				if (t->Vector.count > 1 && gb_is_between(index, 2, t->Vector.count-1)) {
-					error_node(cl->elems.e[0], "Expected either 1 (broadcast) or %td elements in vector literal, got %td", t->Vector.count, index);
-				}
-			}
-
-			if (t->kind == Type_Array && is_to_be_determined_array_count) {
-				t->Array.count = max;
-			}
-		} break;
-
-		case Type_Basic: {
-			if (!is_type_any(t)) {
-				if (cl->elems.count != 0) {
-					error_node(node, "Illegal compound literal");
-				}
-				break;
-			}
-			if (cl->elems.count == 0) {
-				break; // NOTE(bill): No need to init
-			}
-			{ // Checker values
-				Type *field_types[2] = {t_rawptr, t_type_info_ptr};
-				isize field_count = 2;
-				if (cl->elems.e[0]->kind == AstNode_FieldValue) {
-					bool fields_visited[2] = {0};
-
-					for_array(i, cl->elems) {
-						AstNode *elem = cl->elems.e[i];
-						if (elem->kind != AstNode_FieldValue) {
-							error_node(elem, "Mixture of `field = value` and value elements in a `any` literal is not allowed");
-							continue;
-						}
-						ast_node(fv, FieldValue, elem);
-						if (fv->field->kind != AstNode_Ident) {
-							gbString expr_str = expr_to_string(fv->field);
-							error_node(elem, "Invalid field name `%s` in `any` literal", expr_str);
-							gb_string_free(expr_str);
-							continue;
-						}
-						String name = fv->field->Ident.string;
-
-						Selection sel = lookup_field(c->allocator, type, name, o->mode == Addressing_Type);
-						if (sel.entity == NULL) {
-							error_node(elem, "Unknown field `%.*s` in `any` literal", LIT(name));
-							continue;
-						}
-
-						isize index = sel.index.e[0];
-
-						if (fields_visited[index]) {
-							error_node(elem, "Duplicate field `%.*s` in `any` literal", LIT(name));
-							continue;
-						}
-
-						fields_visited[index] = true;
-						check_expr(c, o, fv->value);
-
-						// NOTE(bill): `any` literals can never be constant
-						is_constant = false;
-
-						check_assignment(c, o, field_types[index], str_lit("`any` literal"));
-					}
-				} else {
-					for_array(index, cl->elems) {
-						AstNode *elem = cl->elems.e[index];
-						if (elem->kind == AstNode_FieldValue) {
-							error_node(elem, "Mixture of `field = value` and value elements in a `any` literal is not allowed");
-							continue;
-						}
-
-
-						check_expr(c, o, elem);
-						if (index >= field_count) {
-							error_node(o->expr, "Too many values in `any` literal, expected %td", field_count);
-							break;
-						}
-
-						// NOTE(bill): `any` literals can never be constant
-						is_constant = false;
-
-						check_assignment(c, o, field_types[index], str_lit("`any` literal"));
-					}
-					if (cl->elems.count < field_count) {
-						error(cl->close, "Too few values in `any` literal, expected %td, got %td", field_count, cl->elems.count);
-					}
-				}
-			}
-		} break;
-
-		case Type_Map: {
-			if (cl->elems.count == 0) {
-				break;
-			}
-			is_constant = false;
-			{ // Checker values
-				for_array(i, cl->elems) {
-					AstNode *elem = cl->elems.e[i];
-					if (elem->kind != AstNode_FieldValue) {
-						error_node(elem, "Only `field = value` elements are allowed in a map literal");
-						continue;
-					}
-					ast_node(fv, FieldValue, elem);
-					check_expr_with_type_hint(c, o, fv->field, t->Map.key);
-					check_assignment(c, o, t->Map.key, str_lit("map literal"));
-					if (o->mode == Addressing_Invalid) {
-						continue;
-					}
-
-					check_expr_with_type_hint(c, o, fv->value, t->Map.value);
-					check_assignment(c, o, t->Map.value, str_lit("map literal"));
-				}
-			}
-		} break;
-
-		default: {
-			gbString str = type_to_string(type);
-			error_node(node, "Invalid compound literal type `%s`", str);
-			gb_string_free(str);
-			return kind;
-		} break;
-		}
-
-		if (is_constant) {
-			o->mode = Addressing_Constant;
-			o->value = exact_value_compound(node);
-		} else {
-			o->mode = Addressing_Value;
-		}
-		o->type = type;
-	case_end;
-
-	case_ast_node(pe, ParenExpr, node);
-		kind = check_expr_base(c, o, pe->expr, type_hint);
-		o->expr = node;
-	case_end;
-
-	case_ast_node(te, TagExpr, node);
-		String name = te->name.string;
-		error_node(node, "Unknown tag expression, #%.*s", LIT(name));
-		if (te->expr) {
-			kind = check_expr_base(c, o, te->expr, type_hint);
-		}
-		o->expr = node;
-	case_end;
-
-	case_ast_node(re, RunExpr, node);
-		// TODO(bill): Tag expressions
-		kind = check_expr_base(c, o, re->expr, type_hint);
-		o->expr = node;
-	case_end;
-
-	case_ast_node(ta, TypeAssertion, node);
-		check_expr(c, o, ta->expr);
-		if (o->mode == Addressing_Invalid) {
-			o->expr = node;
-			return kind;
-		}
-		Type *t = check_type(c, ta->type);
-
-		if (o->mode == Addressing_Constant) {
-			gbString expr_str = expr_to_string(o->expr);
-			error_node(o->expr, "A type assertion cannot be applied to a constant expression: `%s`", expr_str);
-			gb_string_free(expr_str);
-			o->mode = Addressing_Invalid;
-			o->expr = node;
-			return kind;
-		}
-
-		if (is_type_untyped(o->type)) {
-			gbString expr_str = expr_to_string(o->expr);
-			error_node(o->expr, "A type assertion cannot be applied to an untyped expression: `%s`", expr_str);
-			gb_string_free(expr_str);
-			o->mode = Addressing_Invalid;
-			o->expr = node;
-			return kind;
-		}
-
-
-		bool src_is_ptr = is_type_pointer(o->type);
-		bool dst_is_ptr = is_type_pointer(t);
-		Type *src = type_deref(o->type);
-		Type *dst = type_deref(t);
-		Type *bsrc = base_type(src);
-		Type *bdst = base_type(dst);
-
-		if (src_is_ptr != dst_is_ptr) {
-			gbString src_type_str = type_to_string(o->type);
-			gbString dst_type_str = type_to_string(t);
-			error_node(o->expr, "Invalid type assertion types: `%s` and `%s`", src_type_str, dst_type_str);
-			gb_string_free(dst_type_str);
-			gb_string_free(src_type_str);
-			o->mode = Addressing_Invalid;
-			o->expr = node;
-			return kind;
-		}
-
-		if (is_type_union(src)) {
-			bool ok = false;
-			for (isize i = 1; i < bsrc->Record.variant_count; i++) {
-				Entity *f = bsrc->Record.variants[i];
-				if (are_types_identical(f->type, dst)) {
-					ok = true;
-					break;
-				}
-			}
-
-			if (!ok) {
-				gbString expr_str = expr_to_string(o->expr);
-				gbString dst_type_str = type_to_string(t);
-				error_node(o->expr, "Cannot type assert `%s` to `%s`", expr_str, dst_type_str);
-				gb_string_free(dst_type_str);
-				gb_string_free(expr_str);
-				o->mode = Addressing_Invalid;
-				o->expr = node;
-				return kind;
-			}
-
-			add_type_info_type(c, o->type);
-			add_type_info_type(c, t);
-
-			o->type = t;
-			o->mode = Addressing_OptionalOk;
-		} else if (is_type_any(o->type)) {
-			o->type = t;
-			o->mode = Addressing_OptionalOk;
-
-			add_type_info_type(c, o->type);
-			add_type_info_type(c, t);
-		} else {
-			error_node(o->expr, "Type assertions can only operate on unions");
-			o->mode = Addressing_Invalid;
-			o->expr = node;
-			return kind;
-		}
-	case_end;
-
-	case_ast_node(ue, UnaryExpr, node);
-		check_expr_base(c, o, ue->expr, type_hint);
-		if (o->mode == Addressing_Invalid) {
-			o->expr = node;
-			return kind;
-		}
-		check_unary_expr(c, o, ue->op, node);
-		if (o->mode == Addressing_Invalid) {
-			o->expr = node;
-			return kind;
-		}
-	case_end;
-
-
-	case_ast_node(be, BinaryExpr, node);
-		check_binary_expr(c, o, node);
-		if (o->mode == Addressing_Invalid) {
-			o->expr = node;
-			return kind;
-		}
-	case_end;
-
-
-
-	case_ast_node(se, SelectorExpr, node);
-		check_selector(c, o, node, type_hint);
-	case_end;
-
-
-	case_ast_node(ie, IndexExpr, node);
-		check_expr(c, o, ie->expr);
-		if (o->mode == Addressing_Invalid) {
-			o->expr = node;
-			return kind;
-		}
-
-		Type *t = base_type(type_deref(o->type));
-		bool is_ptr = is_type_pointer(o->type);
-		bool is_const = o->mode == Addressing_Constant;
-
-		if (is_type_map(t)) {
-			Operand key = {0};
-			check_expr(c, &key, ie->index);
-			check_assignment(c, &key, t->Map.key, str_lit("map index"));
-			if (key.mode == Addressing_Invalid) {
-				o->mode = Addressing_Invalid;
-				o->expr = node;
-				return kind;
-			}
-			o->mode = Addressing_MapIndex;
-			o->type = t->Map.value;
-			o->expr = node;
-			return Expr_Expr;
-		}
-
-		i64 max_count = -1;
-		bool valid = check_set_index_data(o, t, is_ptr, &max_count);
-
-		if (is_const) {
-			valid = false;
-		}
-
-		if (!valid && (is_type_struct(t) || is_type_raw_union(t))) {
-			Entity *found = find_using_index_expr(t);
-			if (found != NULL) {
-				valid = check_set_index_data(o, found->type, is_type_pointer(found->type), &max_count);
-			}
-		}
-
-		if (!valid) {
-			gbString str = expr_to_string(o->expr);
-			if (is_const) {
-				error_node(o->expr, "Cannot index a constant `%s`", str);
-			} else {
-				error_node(o->expr, "Cannot index `%s`", str);
-			}
-			gb_string_free(str);
-			o->mode = Addressing_Invalid;
-			o->expr = node;
-			return kind;
-		}
-
-		if (ie->index == NULL) {
-			gbString str = expr_to_string(o->expr);
-			error_node(o->expr, "Missing index for `%s`", str);
-			gb_string_free(str);
-			o->mode = Addressing_Invalid;
-			o->expr = node;
-			return kind;
-		}
-
-		i64 index = 0;
-		bool ok = check_index_value(c, false, ie->index, max_count, &index);
-
-	case_end;
-
-
-
-	case_ast_node(se, SliceExpr, node);
-		check_expr(c, o, se->expr);
-		if (o->mode == Addressing_Invalid) {
-			o->mode = Addressing_Invalid;
-			o->expr = node;
-			return kind;
-		}
-
-		bool valid = false;
-		i64 max_count = -1;
-		Type *t = base_type(type_deref(o->type));
-		switch (t->kind) {
-		case Type_Basic:
-			if (is_type_string(t)) {
-				if (se->index3) {
-					error_node(node, "3-index slice on a string in not needed");
-					o->mode = Addressing_Invalid;
-					o->expr = node;
-					return kind;
-				}
-				valid = true;
-				if (o->mode == Addressing_Constant) {
-					max_count = o->value.value_string.len;
-				}
-				o->type = t_string;
-			}
-			break;
-
-		case Type_Array:
-			valid = true;
-			max_count = t->Array.count;
-			if (o->mode != Addressing_Variable) {
-				gbString str = expr_to_string(node);
-				error_node(node, "Cannot slice array `%s`, value is not addressable", str);
-				gb_string_free(str);
-				o->mode = Addressing_Invalid;
-				o->expr = node;
-				return kind;
-			}
-			o->type = make_type_slice(c->allocator, t->Array.elem);
-			break;
-
-		case Type_Slice:
-			valid = true;
-			break;
-
-		case Type_DynamicArray:
-			valid = true;
-			o->type = make_type_slice(c->allocator, t->DynamicArray.elem);
-			break;
-		}
-
-		if (!valid) {
-			gbString str = expr_to_string(o->expr);
-			error_node(o->expr, "Cannot slice `%s`", str);
-			gb_string_free(str);
-			o->mode = Addressing_Invalid;
-			o->expr = node;
-			return kind;
-		}
-
-		if (o->mode != Addressing_Immutable) {
-			o->mode = Addressing_Value;
-		}
-
-		if (se->low == NULL && se->high != NULL) {
-			error(se->interval0, "1st index is required if a 2nd index is specified");
-			// It is okay to continue as it will assume the 1st index is zero
-		}
-
-		if (se->index3 && (se->high == NULL || se->max == NULL)) {
-			error(se->close, "2nd and 3rd indices are required in a 3-index slice");
-			o->mode = Addressing_Invalid;
-			o->expr = node;
-			return kind;
-		}
-
-		if (se->index3 && se->interval0.kind != se->interval1.kind) {
-			error(se->close, "The interval separators for in a 3-index slice must be the same");
-			o->mode = Addressing_Invalid;
-			o->expr = node;
-			return kind;
-		}
-
-
-		TokenKind interval_kind = se->interval0.kind;
-
-		i64 indices[2] = {0};
-		AstNode *nodes[3] = {se->low, se->high, se->max};
-		for (isize i = 0; i < gb_count_of(nodes); i++) {
-			i64 index = max_count;
-			if (nodes[i] != NULL) {
-				i64 capacity = -1;
-				if (max_count >= 0) {
-					capacity = max_count;
-				}
-				i64 j = 0;
-				if (check_index_value(c, interval_kind == Token_Ellipsis, nodes[i], capacity, &j)) {
-					index = j;
-				}
-			} else if (i == 0) {
-				index = 0;
-			}
-			indices[i] = index;
-		}
-
-		for (isize i = 0; i < gb_count_of(indices); i++) {
-			i64 a = indices[i];
-			for (isize j = i+1; j < gb_count_of(indices); j++) {
-				i64 b = indices[j];
-				if (a > b && b >= 0) {
-					error(se->close, "Invalid slice indices: [%td > %td]", a, b);
-				}
-			}
-		}
-
-	case_end;
-
-
-	case_ast_node(ce, CallExpr, node);
-		return check_call_expr(c, o, node);
-	case_end;
-
-	case_ast_node(ce, MacroCallExpr, node);
-		return check_macro_call_expr(c, o, node);
-	case_end;
-
-	case_ast_node(de, DerefExpr, node);
-		check_expr_or_type(c, o, de->expr);
-		if (o->mode == Addressing_Invalid) {
-			o->mode = Addressing_Invalid;
-			o->expr = node;
-			return kind;
-		} else {
-			Type *t = base_type(o->type);
-			if (t->kind == Type_Pointer) {
-				if (o->mode != Addressing_Immutable) {
-					o->mode = Addressing_Variable;
-				}
-				o->type = t->Pointer.elem;
- 			} else {
- 				gbString str = expr_to_string(o->expr);
- 				error_node(o->expr, "Cannot dereference `%s`", str);
- 				gb_string_free(str);
- 				o->mode = Addressing_Invalid;
- 				o->expr = node;
- 				return kind;
- 			}
-		}
-	case_end;
-
-	case AstNode_HelperType:
-	case AstNode_ProcType:
-	case AstNode_PointerType:
-	case AstNode_ArrayType:
-	case AstNode_DynamicArrayType:
-	case AstNode_VectorType:
-	case AstNode_StructType:
-	case AstNode_UnionType:
-	case AstNode_RawUnionType:
-	case AstNode_EnumType:
-	case AstNode_MapType:
-		o->mode = Addressing_Type;
-		o->type = check_type(c, node);
-		break;
-	}
-
-	kind = Expr_Expr;
-	o->expr = node;
-	return kind;
-}
-
-ExprKind check_expr_base(Checker *c, Operand *o, AstNode *node, Type *type_hint) {
-	ExprKind kind = check_expr_base_internal(c, o, node, type_hint);
-	Type *type = NULL;
-	ExactValue value = {ExactValue_Invalid};
-	switch (o->mode) {
-	case Addressing_Invalid:
-		type = t_invalid;
-		break;
-	case Addressing_NoValue:
-		type = NULL;
-		break;
-	case Addressing_Constant:
-		type = o->type;
-		value = o->value;
-		break;
-	default:
-		type = o->type;
-		break;
-	}
-
-	if (type != NULL && is_type_untyped(type)) {
-		add_untyped(&c->info, node, false, o->mode, type, value);
-	} else {
-		add_type_and_value(&c->info, node, o->mode, type, value);
-	}
-	return kind;
-}
-
-
-
-void check_multi_expr(Checker *c, Operand *o, AstNode *e) {
-	check_expr_base(c, o, e, NULL);
-	switch (o->mode) {
-	default:
-		return; // NOTE(bill): Valid
-	case Addressing_NoValue:
-		error_operand_no_value(o);
-		break;
-	case Addressing_Type:
-		error_operand_not_expression(o);
-		break;
-	}
-	o->mode = Addressing_Invalid;
-}
-
-void check_not_tuple(Checker *c, Operand *o) {
-	if (o->mode == Addressing_Value) {
-		// NOTE(bill): Tuples are not first class thus never named
-		if (o->type->kind == Type_Tuple) {
-			isize count = o->type->Tuple.variable_count;
-			GB_ASSERT(count != 1);
-			error_node(o->expr,
-			      "%td-valued tuple found where single value expected", count);
-			o->mode = Addressing_Invalid;
-		}
-	}
-}
-
-void check_expr(Checker *c, Operand *o, AstNode *e) {
-	check_multi_expr(c, o, e);
-	check_not_tuple(c, o);
-}
-
-
-void check_expr_or_type(Checker *c, Operand *o, AstNode *e) {
-	check_expr_base(c, o, e, NULL);
-	check_not_tuple(c, o);
-	error_operand_no_value(o);
-}
-
-
-gbString write_expr_to_string(gbString str, AstNode *node);
-
-gbString write_record_fields_to_string(gbString str, AstNodeArray params) {
-	for_array(i, params) {
-		if (i > 0) {
-			str = gb_string_appendc(str, ", ");
-		}
-		str = write_expr_to_string(str, params.e[i]);
-	}
-	return str;
-}
-
-gbString string_append_token(gbString str, Token token) {
-	if (token.string.len > 0) {
-		return gb_string_append_length(str, token.string.text, token.string.len);
-	}
-	return str;
-}
-
-
-gbString write_expr_to_string(gbString str, AstNode *node) {
-	if (node == NULL)
-		return str;
-
-	if (is_ast_node_stmt(node)) {
-		GB_ASSERT("stmt passed to write_expr_to_string");
-	}
-
-	switch (node->kind) {
-	default:
-		str = gb_string_appendc(str, "(BadExpr)");
-		break;
-
-	case_ast_node(i, Ident, node);
-		str = string_append_token(str, *i);
-	case_end;
-
-	case_ast_node(i, Implicit, node);
-		str = string_append_token(str, *i);
-	case_end;
-
-	case_ast_node(bl, BasicLit, node);
-		str = string_append_token(str, *bl);
-	case_end;
-
-	case_ast_node(bd, BasicDirective, node);
-		str = gb_string_appendc(str, "#");
-		str = gb_string_append_length(str, bd->name.text, bd->name.len);
-	case_end;
-
-	case_ast_node(pl, ProcLit, node);
-		str = write_expr_to_string(str, pl->type);
-	case_end;
-
-	case_ast_node(cl, CompoundLit, node);
-		str = write_expr_to_string(str, cl->type);
-		str = gb_string_appendc(str, "{");
-		for_array(i, cl->elems) {
-			if (i > 0) {
-				str = gb_string_appendc(str, ", ");
-			}
-			str = write_expr_to_string(str, cl->elems.e[i]);
-		}
-		str = gb_string_appendc(str, "}");
-	case_end;
-
-
-	case_ast_node(te, TagExpr, node);
-		str = gb_string_appendc(str, "#");
-		str = string_append_token(str, te->name);
-		str = write_expr_to_string(str, te->expr);
-	case_end;
-
-	case_ast_node(ue, UnaryExpr, node);
-		str = string_append_token(str, ue->op);
-		str = write_expr_to_string(str, ue->expr);
-	case_end;
-
-	case_ast_node(de, DerefExpr, node);
-		str = write_expr_to_string(str, de->expr);
-		str = gb_string_appendc(str, "^");
-	case_end;
-
-	case_ast_node(be, BinaryExpr, node);
-		str = write_expr_to_string(str, be->left);
-		str = gb_string_appendc(str, " ");
-		str = string_append_token(str, be->op);
-		str = gb_string_appendc(str, " ");
-		str = write_expr_to_string(str, be->right);
-	case_end;
-
-	case_ast_node(pe, ParenExpr, node);
-		str = gb_string_appendc(str, "(");
-		str = write_expr_to_string(str, pe->expr);
-		str = gb_string_appendc(str, ")");
-	case_end;
-
-	case_ast_node(se, SelectorExpr, node);
-		str = write_expr_to_string(str, se->expr);
-		str = gb_string_appendc(str, ".");
-		str = write_expr_to_string(str, se->selector);
-	case_end;
-
-	case_ast_node(ta, TypeAssertion, node);
-		str = write_expr_to_string(str, ta->expr);
-		str = gb_string_appendc(str, ".(");
-		str = write_expr_to_string(str, ta->type);
-		str = gb_string_appendc(str, ")");
-	case_end;
-
-	case_ast_node(ie, IndexExpr, node);
-		str = write_expr_to_string(str, ie->expr);
-		str = gb_string_appendc(str, "[");
-		str = write_expr_to_string(str, ie->index);
-		str = gb_string_appendc(str, "]");
-	case_end;
-
-	case_ast_node(se, SliceExpr, node);
-		str = write_expr_to_string(str, se->expr);
-		str = gb_string_appendc(str, "[");
-		str = write_expr_to_string(str, se->low);
-		str = gb_string_appendc(str, "..");
-		str = write_expr_to_string(str, se->high);
-		if (se->index3) {
-			str = gb_string_appendc(str, "..");
-			str = write_expr_to_string(str, se->max);
-		}
-		str = gb_string_appendc(str, "]");
-	case_end;
-
-	case_ast_node(e, Ellipsis, node);
-		str = gb_string_appendc(str, "..");
-	case_end;
-
-	case_ast_node(fv, FieldValue, node);
-		str = write_expr_to_string(str, fv->field);
-		str = gb_string_appendc(str, " = ");
-		str = write_expr_to_string(str, fv->value);
-	case_end;
-
-	case_ast_node(pt, PointerType, node);
-		str = gb_string_appendc(str, "^");
-		str = write_expr_to_string(str, pt->type);
-	case_end;
-
-	case_ast_node(at, ArrayType, node);
-		str = gb_string_appendc(str, "[");
-		if (at->count != NULL &&
-		    at->count->kind == AstNode_UnaryExpr &&
-		    at->count->UnaryExpr.op.kind == Token_Ellipsis) {
-			str = gb_string_appendc(str, "..");
-		} else {
-			str = write_expr_to_string(str, at->count);
-		}
-		str = gb_string_appendc(str, "]");
-		str = write_expr_to_string(str, at->elem);
-	case_end;
-
-	case_ast_node(at, DynamicArrayType, node);
-		str = gb_string_appendc(str, "[..]");
-		str = write_expr_to_string(str, at->elem);
-	case_end;
-
-	case_ast_node(vt, VectorType, node);
-		str = gb_string_appendc(str, "[vector ");
-		str = write_expr_to_string(str, vt->count);
-		str = gb_string_appendc(str, "]");
-		str = write_expr_to_string(str, vt->elem);
-	case_end;
-
-	case_ast_node(f, Field, node);
-		if (f->flags&FieldFlag_using) {
-			str = gb_string_appendc(str, "using ");
-		}
-		if (f->flags&FieldFlag_immutable) {
-			str = gb_string_appendc(str, "immutable ");
-		}
-		if (f->flags&FieldFlag_no_alias) {
-			str = gb_string_appendc(str, "no_alias ");
-		}
-
-		for_array(i, f->names) {
-			AstNode *name = f->names.e[i];
-			if (i > 0) {
-				str = gb_string_appendc(str, ", ");
-			}
-			str = write_expr_to_string(str, name);
-		}
-		if (f->names.count > 0) {
-			str = gb_string_appendc(str, ": ");
-		}
-		if (f->flags&FieldFlag_ellipsis) {
-			str = gb_string_appendc(str, "..");
-		}
-		str = write_expr_to_string(str, f->type);
-	case_end;
-
-	case_ast_node(f, FieldList, node);
-		for_array(i, f->list) {
-			if (i > 0) {
-				str = gb_string_appendc(str, ", ");
-			}
-			str = write_expr_to_string(str, f->list.e[i]);
-		}
-	case_end;
-
-	case_ast_node(f, UnionField, node);
-		str = write_expr_to_string(str, f->name);
-		str = gb_string_appendc(str, "{");
-		str = write_expr_to_string(str, f->list);
-		str = gb_string_appendc(str, "}");
-	case_end;
-
-	case_ast_node(ce, CallExpr, node);
-		str = write_expr_to_string(str, ce->proc);
-		str = gb_string_appendc(str, "(");
-
-		for_array(i, ce->args) {
-			AstNode *arg = ce->args.e[i];
-			if (i > 0) {
-				str = gb_string_appendc(str, ", ");
-			}
-			str = write_expr_to_string(str, arg);
-		}
-		str = gb_string_appendc(str, ")");
-	case_end;
-
-	case_ast_node(pt, ProcType, node);
-		str = gb_string_appendc(str, "proc(");
-		str = write_expr_to_string(str, pt->params);
-		str = gb_string_appendc(str, ")");
-	case_end;
-
-	case_ast_node(st, StructType, node);
-		str = gb_string_appendc(str, "struct ");
-		if (st->is_packed)  str = gb_string_appendc(str, "#packed ");
-		if (st->is_ordered) str = gb_string_appendc(str, "#ordered ");
-		str = gb_string_appendc(str, "{");
-		str = write_record_fields_to_string(str, st->fields);
-		str = gb_string_appendc(str, "}");
-	case_end;
-
-	case_ast_node(st, RawUnionType, node);
-		str = gb_string_appendc(str, "raw_union ");
-		str = gb_string_appendc(str, "{");
-		str = write_record_fields_to_string(str, st->fields);
-		str = gb_string_appendc(str, "}");
-	case_end;
-
-	case_ast_node(st, UnionType, node);
-		str = gb_string_appendc(str, "union ");
-		str = gb_string_appendc(str, "{");
-		str = write_record_fields_to_string(str, st->fields);
-		str = gb_string_appendc(str, "}");
-	case_end;
-
-	case_ast_node(et, EnumType, node);
-		str = gb_string_appendc(str, "enum ");
-		if (et->base_type != NULL) {
-			str = write_expr_to_string(str, et->base_type);
-			str = gb_string_appendc(str, " ");
-		}
-		str = gb_string_appendc(str, "{");
-		for_array(i, et->fields) {
-			if (i > 0) {
-				str = gb_string_appendc(str, ", ");
-			}
-			str = write_expr_to_string(str, et->fields.e[i]);
-		}
-		str = gb_string_appendc(str, "}");
-	case_end;
-
-	case_ast_node(ht, HelperType, node);
-		str = gb_string_appendc(str, "#type ");
-		str = write_expr_to_string(str, ht->type);
-	case_end;
-
-	case_ast_node(at, AtomicType, node);
-		str = gb_string_appendc(str, "atomic ");
-		str = write_expr_to_string(str, at->type);
-	case_end;
-	}
-
-	return str;
-}
-
-gbString expr_to_string(AstNode *expression) {
-	return write_expr_to_string(gb_string_make(heap_allocator(), ""), expression);
-}