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Skip nested #if in a skipped #if-clause

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This commit is contained in:
Rui Ueyama 2020-03-30 09:54:47 +09:00
parent bf6ff928ad
commit aa570f3086
2 changed files with 9 additions and 1 deletions
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8
preprocess.c
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@ -53,10 +53,16 @@ static Token *append(Token *tok1, Token *tok2) {
} }
// Skip until next `#endif`. // Skip until next `#endif`.
// Nested `#if` and `#endif` are skipped.
static Token *skip_cond_incl(Token *tok) { static Token *skip_cond_incl(Token *tok) {
while (tok->kind != TK_EOF) { while (tok->kind != TK_EOF) {
if (is_hash(tok) && equal(tok->next, "if")) {
tok = skip_cond_incl(tok->next->next);
tok = tok->next;
continue;
}
if (is_hash(tok) && equal(tok->next, "endif")) if (is_hash(tok) && equal(tok->next, "endif"))
return tok; break;
tok = tok->next; tok = tok->next;
} }
return tok; return tok;

2
test/macro.c
View File

@ -17,6 +17,8 @@ int main() {
#if 0 #if 0
#include "/no/such/file" #include "/no/such/file"
assert(0, 1, "1"); assert(0, 1, "1");
#if nested
#endif
#endif #endif
int m = 0; int m = 0;