From 45f51624c4fdfab66be2976f1ceef32f000dd34d Mon Sep 17 00:00:00 2001
From: nsfisis <nsfisis@gmail.com>
Date: Mon, 4 Aug 2025 08:23:05 +0900
Subject: feat: report error on unknown preprocessor directive

---
 preprocess.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'preprocess.c')

diff --git a/preprocess.c b/preprocess.c
index 066a77f..5b7c180 100644
--- a/preprocess.c
+++ b/preprocess.c
@@ -945,6 +945,9 @@ void process_pp_directives(Preprocessor* pp) {
             } else if ((next_tok = process_define_directive(pp, tok)) != NULL) {
                 tok = next_tok;
                 continue;
+            } else {
+                fatal_error("%s:%d: unknown preprocessor directive (%s)", tok->loc.filename, tok->loc.line,
+                            token_stringify(tok + 1));
             }
         } else if (skip_pp_tokens(pp)) {
             make_token_whitespace(tok);
-- 
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