1 files changed, 66 insertions, 0 deletions
diff --git a/src/checker/entity.cpp b/src/checker/entity.cpp
new file mode 100644
index 000000000..74ed6780f
--- /dev/null
+++ b/src/checker/entity.cpp
@@ -0,0 +1,66 @@
+struct Scope;
+struct Checker;
+
+enum EntityKind {
+	Entity_Invalid,
+
+	Entity_Constant,
+	Entity_Variable,
+	Entity_TypeName,
+	Entity_Procedure,
+	Entity_Builtin,
+
+	Entity_Count,
+};
+
+typedef i64 EntityGuid;
+
+struct Entity {
+	EntityKind kind;
+	EntityGuid guid;
+
+	Scope *parent;
+	Token token;
+	Type *type;
+
+	union {
+		struct { Value value; } constant;
+		struct {
+			b8 visited;
+			b8 is_field;
+			b8 used;
+		} variable;
+		struct {} type_name;
+		struct {} procedure;
+		struct { i32 id; } builtin;
+	};
+};
+
+gb_global gbAtomic64 entity_guid_counter = {0};
+
+EntityGuid next_entity_guid(void) {
+	return cast(EntityGuid)gb_atomic64_fetch_add(&entity_guid_counter, 1);
+}
+
+Entity *alloc_entity(gbAllocator a, EntityKind kind, Scope *parent, Token token, Type *type) {
+	Entity *entity = gb_alloc_item(a, Entity);
+	entity->kind   = kind;
+	entity->guid   = next_entity_guid();
+	entity->parent = parent;
+	entity->token  = token;
+	entity->type   = type;
+	return entity;
+}
+
+
+
+
+Entity *make_entity_variable (Checker *c, Scope *parent, Token token, Type *type);
+Entity *make_entity_constant (Checker *c, Scope *parent, Token token, Type *type, Value value);
+Entity *make_entity_type_name(Checker *c, Scope *parent, Token token, Type *type);
+Entity *make_entity_param    (Checker *c, Scope *parent, Token token, Type *type);
+Entity *make_entity_field    (Checker *c, Scope *parent, Token token, Type *type);
+Entity *make_entity_procedure(Checker *c, Scope *parent, Token token, Type *signature_type);
+Entity *make_entity_builtin  (Checker *c, Scope *parent, Token token, Type *type, i32 id);
+
+Entity *make_entity_dummy_variable(Checker *c, Token token);