wip: working on generator

- Feat: add extern type resolving to type slot
- Feat: add extern block handling
- Feat: add extern function handling

include/compiler/internals/gen.h

@@ -1,6 +1,7 @@
 #ifndef INTERNALS_GEN_H
 #define INTERNALS_GEN_H
 
+#include <common/fzl_extern.h>
 #include <common/fzl_opcodes.h>
 #include <common/fzl_types.h>
 #include <compiler/fzl_gen.h>
@@ -10,11 +11,13 @@
 #include <compiler/utils/fzl_symtable.h>
 #include <stdbool.h>
 #include <stddef.h>
+#include <stdio.h>
 
 extern char *null_name;
 
 bool gen_resolve_name(fzl_gen_t *gen, char *name, fzl_sym_t *sym);
 bool gen_resolve_type(fzl_gen_t *gen, fzl_token_t *tok, fzl_type_t *t, char *c);
+ssize_t gen_resolve_extern_type(fzl_gen_t *gen, char *name);
 bool gen_is_types_compatible(fzl_type_t t1, fzl_type_t t2, char *c1, char *c2);
 size_t gen_add_const(fzl_gen_t *gen, fzl_const_t c);
 void gen_op(fzl_gen_t *gen, fzl_opcode_t opcode);