File reorganization for checker system.

1 files changed, 190 insertions, 0 deletions

diff --git a/src/entity.c b/src/entity.c
new file mode 100644
index 000000000..17fb70e06
--- /dev/null
+++ b/src/entity.c
@@ -0,0 +1,190 @@
+typedef struct Scope Scope;
+typedef struct Checker Checker;
+typedef struct Type Type;
+typedef enum BuiltinProcId BuiltinProcId;
+typedef enum ImplicitValueId ImplicitValueId;
+
+#define ENTITY_KINDS \
+	ENTITY_KIND(Invalid) \
+	ENTITY_KIND(Constant) \
+	ENTITY_KIND(Variable) \
+	ENTITY_KIND(TypeName) \
+	ENTITY_KIND(Procedure) \
+	ENTITY_KIND(Builtin) \
+	ENTITY_KIND(ImportName) \
+	ENTITY_KIND(Nil) \
+	ENTITY_KIND(ImplicitValue) \
+	ENTITY_KIND(Count)
+
+typedef enum EntityKind {
+#define ENTITY_KIND(k) GB_JOIN2(Entity_, k),
+	ENTITY_KINDS
+#undef ENTITY_KIND
+} EntityKind;
+
+String const entity_strings[] = {
+#define ENTITY_KIND(k) {cast(u8 *)#k, gb_size_of(#k)-1},
+	ENTITY_KINDS
+#undef ENTITY_KIND
+};
+
+typedef enum EntityFlag {
+	EntityFlag_Visited    = 1<<0,
+	EntityFlag_Used       = 1<<1,
+	EntityFlag_Anonymous  = 1<<2,
+	EntityFlag_Field      = 1<<3,
+	EntityFlag_Param      = 1<<4,
+	EntityFlag_VectorElem = 1<<5,
+} EntityFlag;
+
+typedef struct Entity Entity;
+struct Entity {
+	EntityKind kind;
+	u32        flags;
+	Token      token;
+	Scope *    scope;
+	Type *     type;
+	AstNode *  identifier; // Can be NULL
+
+	// TODO(bill): Cleanup how `using` works for entities
+	Entity *   using_parent;
+	AstNode *  using_expr;
+
+	union {
+		struct {
+			ExactValue value;
+		} Constant;
+		struct {
+			i32  field_index;
+			i32  field_src_index;
+			bool is_immutable;
+		} Variable;
+		i32 TypeName;
+		struct {
+			bool   is_foreign;
+			String foreign_name;
+			String link_name;
+			u64    tags;
+		} Procedure;
+		struct {
+			BuiltinProcId id;
+		} Builtin;
+		struct {
+			String path;
+			String name;
+			Scope *scope;
+			bool   used;
+		} ImportName;
+		i32 Nil;
+		struct {
+			// TODO(bill): Should this be a user-level construct rather than compiler-level?
+			ImplicitValueId id;
+			Entity *        backing;
+		} ImplicitValue;
+	};
+};
+
+
+Entity *e_iota = NULL;
+
+
+Entity *alloc_entity(gbAllocator a, EntityKind kind, Scope *scope, Token token, Type *type) {
+	Entity *entity = gb_alloc_item(a, Entity);
+	entity->kind   = kind;
+	entity->scope  = scope;
+	entity->token  = token;
+	entity->type   = type;
+	return entity;
+}
+
+Entity *make_entity_variable(gbAllocator a, Scope *scope, Token token, Type *type) {
+	Entity *entity = alloc_entity(a, Entity_Variable, scope, token, type);
+	return entity;
+}
+
+Entity *make_entity_using_variable(gbAllocator a, Entity *parent, Token token, Type *type) {
+	GB_ASSERT(parent != NULL);
+	Entity *entity = alloc_entity(a, Entity_Variable, parent->scope, token, type);
+	entity->using_parent = parent;
+	entity->flags |= EntityFlag_Anonymous;
+	return entity;
+}
+
+
+Entity *make_entity_constant(gbAllocator a, Scope *scope, Token token, Type *type, ExactValue value) {
+	Entity *entity = alloc_entity(a, Entity_Constant, scope, token, type);
+	entity->Constant.value = value;
+	return entity;
+}
+
+Entity *make_entity_type_name(gbAllocator a, Scope *scope, Token token, Type *type) {
+	Entity *entity = alloc_entity(a, Entity_TypeName, scope, token, type);
+	return entity;
+}
+
+Entity *make_entity_param(gbAllocator a, Scope *scope, Token token, Type *type, bool anonymous) {
+	Entity *entity = make_entity_variable(a, scope, token, type);
+	entity->flags |= EntityFlag_Used;
+	entity->flags |= EntityFlag_Anonymous*(anonymous != 0);
+	entity->flags |= EntityFlag_Param;
+	return entity;
+}
+
+Entity *make_entity_field(gbAllocator a, Scope *scope, Token token, Type *type, bool anonymous, i32 field_src_index) {
+	Entity *entity = make_entity_variable(a, scope, token, type);
+	entity->Variable.field_src_index = field_src_index;
+	entity->Variable.field_index = field_src_index;
+	entity->flags |= EntityFlag_Field;
+	entity->flags |= EntityFlag_Anonymous*(anonymous != 0);
+	return entity;
+}
+
+Entity *make_entity_vector_elem(gbAllocator a, Scope *scope, Token token, Type *type, i32 field_src_index) {
+	Entity *entity = make_entity_variable(a, scope, token, type);
+	entity->Variable.field_src_index = field_src_index;
+	entity->Variable.field_index = field_src_index;
+	entity->flags |= EntityFlag_Field;
+	entity->flags |= EntityFlag_VectorElem;
+	return entity;
+}
+
+Entity *make_entity_procedure(gbAllocator a, Scope *scope, Token token, Type *signature_type, u64 tags) {
+	Entity *entity = alloc_entity(a, Entity_Procedure, scope, token, signature_type);
+	entity->Procedure.tags = tags;
+	return entity;
+}
+
+Entity *make_entity_builtin(gbAllocator a, Scope *scope, Token token, Type *type, BuiltinProcId id) {
+	Entity *entity = alloc_entity(a, Entity_Builtin, scope, token, type);
+	entity->Builtin.id = id;
+	return entity;
+}
+
+Entity *make_entity_import_name(gbAllocator a, Scope *scope, Token token, Type *type,
+                                String path, String name, Scope *import_scope) {
+	Entity *entity = alloc_entity(a, Entity_ImportName, scope, token, type);
+	entity->ImportName.path = path;
+	entity->ImportName.name = name;
+	entity->ImportName.scope = import_scope;
+	return entity;
+}
+
+Entity *make_entity_nil(gbAllocator a, String name, Type *type) {
+	Token token = make_token_ident(name);
+	Entity *entity = alloc_entity(a, Entity_Nil, NULL, token, type);
+	return entity;
+}
+
+Entity *make_entity_implicit_value(gbAllocator a, String name, Type *type, ImplicitValueId id) {
+	Token token = make_token_ident(name);
+	Entity *entity = alloc_entity(a, Entity_ImplicitValue, NULL, token, type);
+	entity->ImplicitValue.id = id;
+	return entity;
+}
+
+
+Entity *make_entity_dummy_variable(gbAllocator a, Scope *scope, Token token) {
+	token.string = str_lit("_");
+	return make_entity_variable(a, scope, token, NULL);
+}
+