Add support for basic structs

Structs for now (and probably for the near future) are not allowed
to be passed by value, and instead you just pass a pointer to it.

Nested structs can also be defined, and they can be either anonymous,
or named (in which case only the members can access the type).

1 files changed, 14 insertions, 0 deletions

diff --git a/src/types.h b/src/types.h
index 73b5b63..e8b9488 100644
--- a/src/types.h
+++ b/src/types.h
@@ -10,12 +10,21 @@ typedef enum {
     TYPE_CHAR,
     TYPE_PTR,
     TYPE_ARRAY,
+    TYPE_STRUCT,
 } DataType;
 
 typedef struct data_type_node {
     DataType type;
     struct data_type_node *ptr;
     i64 array_size;
+    char *struct_name;
+    struct {
+        char **name;
+        struct data_type_node **type;
+        i64 *offset;
+        i64 num_fields;
+        i64 size;
+    } fields;
 } Type;
 
 Type *type_new(DataType type);
@@ -28,6 +37,11 @@ bool type_equals(Type *a, Type *b);
 bool is_int_type(Type *type);
 bool is_string_type(Type *type);
 bool is_convertible(Type *from, Type *to);
+bool is_struct_or_struct_ptr(Type *type);
+
+// Returns the offset of the field in the struct.
+i64 push_field(Type *type, char *field_name, Type *field_type);
+i64 find_field_index(Type *type, char *field_name);
 
 // Type checking / casting expressions to right types
 typedef struct ast_node Node;