From e8068fbe25c84e62299495fab1b1b1475e35ef56 Mon Sep 17 00:00:00 2001
From: nsfisis <nsfisis@gmail.com>
Date: Thu, 8 May 2025 23:36:33 +0900
Subject: support ellipsis in functiion parameters

---
 justfile     |  4 +---
 main.c       | 21 ++++++++++++++++++---
 tests/045.sh | 10 ++++++----
 3 files changed, 25 insertions(+), 10 deletions(-)

diff --git a/justfile b/justfile
index 5ba42a6..86a53e3 100644
--- a/justfile
+++ b/justfile
@@ -1,11 +1,9 @@
-CFLAGS := "-Wno-builtin-declaration-mismatch"
-
 all: build
 
 build N="1":
     #!/usr/bin/env bash
     if [[ {{N}} = 1 ]]; then
-        gcc -g -O0 -o ducc main.c {{CFLAGS}}
+        gcc -g -O0 -o ducc main.c
     else
         if [[ {{N}} = 2 ]]; then
             prev=""
diff --git a/main.c b/main.c
index 146c93a..671595e 100644
--- a/main.c
+++ b/main.c
@@ -9,8 +9,8 @@ int isalpha(int);
 int isdigit(int);
 int isspace(int);
 void* memcpy(void*, void*, size_t);
-int printf();
-int sprintf();
+int printf(const char*, ...);
+int sprintf(char*, const char*, ...);
 int strcmp(const char*, const char*);
 char* strstr(const char*, const char*);
 
@@ -54,6 +54,7 @@ enum TokenKind {
     TokenKind_bracket_r,
     TokenKind_comma,
     TokenKind_dot,
+    TokenKind_ellipsis,
     TokenKind_eq,
     TokenKind_ge,
     TokenKind_gt,
@@ -173,7 +174,17 @@ Token* tokenize(char* src) {
         } else if (c == '%') {
             tok->kind = TokenKind_percent;
         } else if (c == '.') {
-            tok->kind = TokenKind_dot;
+            if (src[pos] == '.') {
+                ++pos;
+                if (src[pos] == '.') {
+                    ++pos;
+                    tok->kind = TokenKind_ellipsis;
+                } else {
+                    fatal_error("unknown token: ..");
+                }
+            } else {
+                tok->kind = TokenKind_dot;
+            }
         } else if (c == '!') {
             if (src[pos] == '=') {
                 ++pos;
@@ -1418,6 +1429,10 @@ AstNode* parse_param_list(Parser* p) {
     int has_void = 0;
     AstNode* list = ast_new_list(6);
     while (peek_token(p)->kind != TokenKind_paren_r) {
+        if (peek_token(p)->kind == TokenKind_ellipsis) {
+            next_token(p);
+            break;
+        }
         AstNode* param = parse_param(p);
         has_void = has_void || param->ty->kind == TypeKind_void;
         ast_append(list, param);
diff --git a/tests/045.sh b/tests/045.sh
index 18f8e76..f788b62 100644
--- a/tests/045.sh
+++ b/tests/045.sh
@@ -3,17 +3,19 @@ set -e
 cat <<'EOF' > expected
 EOF
 bash ../../test_diff.sh <<'EOF'
+typedef long size_t;
+
 int atoi(const char*);
-void* calloc(long, long);
+void* calloc(size_t, size_t);
 void exit(int);
 int getchar(void);
 int isalnum(int);
 int isalpha(int);
 int isdigit(int);
 int isspace(int);
-void* memcpy(void*, void*, long);
-int printf();
-int sprintf();
+void* memcpy(void*, void*, size_t);
+int printf(const char*, ...);
+int sprintf(char*, const char*, ...);
 int strcmp(const char*, const char*);
 char* strstr(const char*, const char*);
 
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