From b3b3c8bcd07e644fdba9167f927ad8dee4a255db Mon Sep 17 00:00:00 2001
From: nsfisis <nsfisis@gmail.com>
Date: Tue, 26 Aug 2025 20:43:21 +0900
Subject: feat: support nop preprocessing directive

---
 src/preprocess.c | 11 +++++++++++
 src/token.c      |  2 ++
 src/token.h      |  1 +
 3 files changed, 14 insertions(+)

(limited to 'src')

diff --git a/src/preprocess.c b/src/preprocess.c
index c96c194..2a53059 100644
--- a/src/preprocess.c
+++ b/src/preprocess.c
@@ -176,6 +176,10 @@ static TokenKind pplexer_tokenize_pp_directive(PpLexer* ppl) {
             break;
         infile_next_char(ppl->src);
     }
+    // '#' new-line
+    if (c == '\n') {
+        return TokenKind_pp_directive_nop;
+    }
 
     SourceLocation pp_directive_name_start_loc = ppl->src->loc;
 
@@ -935,6 +939,11 @@ static void process_pragma_directive(Preprocessor* pp, int directive_token_pos)
     unimplemented();
 }
 
+static void process_nop_directive(Preprocessor* pp, int directive_token_pos) {
+    next_pp_token(pp);
+    remove_directive_tokens(pp, directive_token_pos, pp->pos);
+}
+
 // ws ::= many0(<Whitespace>)
 // macro-arguments ::= '(' <ws> opt(<any-token> <ws> many0(',' <ws> <any-token> <ws>)) ')'
 static MacroArgArray* pp_parse_macro_arguments(Preprocessor* pp) {
@@ -1047,6 +1056,8 @@ static void process_pp_directive(Preprocessor* pp) {
         process_error_directive(pp, first_token_pos);
     } else if (tok->kind == TokenKind_pp_directive_pragma) {
         process_pragma_directive(pp, first_token_pos);
+    } else if (tok->kind == TokenKind_pp_directive_nop) {
+        process_nop_directive(pp, first_token_pos);
     } else if (tok->kind == TokenKind_ident) {
         BOOL expanded = expand_macro(pp);
         if (expanded) {
diff --git a/src/token.c b/src/token.c
index 40463cd..71eabaf 100644
--- a/src/token.c
+++ b/src/token.c
@@ -44,6 +44,8 @@ const char* token_kind_stringify(TokenKind k) {
         return "#include";
     else if (k == TokenKind_pp_directive_line)
         return "#line";
+    else if (k == TokenKind_pp_directive_nop)
+        return "#";
     else if (k == TokenKind_pp_directive_pragma)
         return "#pragma";
     else if (k == TokenKind_pp_directive_undef)
diff --git a/src/token.h b/src/token.h
index 6f5fb2a..034b3b3 100644
--- a/src/token.h
+++ b/src/token.h
@@ -27,6 +27,7 @@ enum TokenKind {
     TokenKind_pp_directive_ifndef,
     TokenKind_pp_directive_include,
     TokenKind_pp_directive_line,
+    TokenKind_pp_directive_nop,
     TokenKind_pp_directive_pragma,
     TokenKind_pp_directive_undef,
     TokenKind_pp_directive_warning,
-- 
cgit v1.2.3-70-g09d2