From f3a1ea57244608c1795e7f90cb3077c6a01686a9 Mon Sep 17 00:00:00 2001
From: nsfisis <nsfisis@gmail.com>
Date: Wed, 3 Sep 2025 20:27:16 +0900
Subject: feat: rewrite function declaration parsing

---
 src/ast.c | 21 ++++++++++++++-------
 1 file changed, 14 insertions(+), 7 deletions(-)

(limited to 'src/ast.c')

diff --git a/src/ast.c b/src/ast.c
index 78fb2b9..1e444ba 100644
--- a/src/ast.c
+++ b/src/ast.c
@@ -45,6 +45,8 @@ const char* type_kind_stringify(TypeKind k) {
         return "<pointer>";
     else if (k == TypeKind_array)
         return "<array>";
+    else if (k == TypeKind_func)
+        return "<function>";
     else
         unreachable();
 }
@@ -60,16 +62,14 @@ Type* type_new(TypeKind kind) {
 }
 
 Type* type_new_ptr(Type* base) {
-    Type* ty = calloc(1, sizeof(Type));
-    ty->kind = TypeKind_ptr;
+    Type* ty = type_new(TypeKind_ptr);
     ty->base = base;
     return ty;
 }
 
-Type* type_new_array(Type* elem, int size) {
-    Type* ty = calloc(1, sizeof(Type));
-    ty->kind = TypeKind_array;
-    ty->base = elem;
+Type* type_new_array(Type* base, int size) {
+    Type* ty = type_new(TypeKind_array);
+    ty->base = base;
     ty->array_size = size;
     return ty;
 }
@@ -82,8 +82,15 @@ Type* type_array_to_ptr(Type* ty) {
     return type_new_ptr(ty->base);
 }
 
+Type* type_new_func(Type* result, AstNode* params) {
+    Type* ty = type_new(TypeKind_func);
+    ty->result = result;
+    ty->params = params;
+    return ty;
+}
+
 BOOL type_is_unsized(Type* ty) {
-    return ty->kind == TypeKind_void;
+    return ty->kind == TypeKind_void || ty->kind == TypeKind_func;
 }
 
 int type_sizeof(Type* ty) {
-- 
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