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Preserve newline and space during macro expansion

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This commit is contained in:
Rui Ueyama 2020-08-30 02:33:01 +09:00
parent a8d76ad435
commit 8075582c21
2 changed files with 22 additions and 0 deletions
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6
preprocess.c
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@ -532,6 +532,8 @@ static Token *subst(Token *tok, MacroArg *args) {
// before they are substituted into a macro body.
if (arg) {
Token *t = preprocess2(arg->tok);
t->at_bol = tok->at_bol;
t->has_space = tok->has_space;
for (; t->kind != TK_EOF; t = t->next)
cur = cur->next = copy_token(t);
tok = tok->next;
@ -563,6 +565,8 @@ static bool expand_macro(Token **rest, Token *tok) {
Hideset *hs = hideset_union(tok->hideset, new_hideset(m->name));
Token *body = add_hideset(m->body, hs);
*rest = append(body, tok->next);
(*rest)->at_bol = tok->at_bol;
(*rest)->has_space = tok->has_space;
return true;
}
@ -587,6 +591,8 @@ static bool expand_macro(Token **rest, Token *tok) {
Token *body = subst(m->body, args);
body = add_hideset(body, hs);
*rest = append(body, tok->next);
(*rest)->at_bol = macro_token->at_bol;
(*rest)->has_space = macro_token->has_space;
return true;
}

16
test/macro.c
View File

@ -290,6 +290,22 @@ int main() {
#endif
ASSERT(5, m);
#define STR(x) #x
#define M12(x) STR(x)
#define M13(x) M12(foo.x)
ASSERT(0, strcmp(M13(bar), "foo.bar"));
#define M13(x) M12(foo. x)
ASSERT(0, strcmp(M13(bar), "foo. bar"));
#define M12 foo
#define M13(x) STR(x)
#define M14(x) M13(x.M12)
ASSERT(0, strcmp(M14(bar), "bar.foo"));
#define M14(x) M13(x. M12)
ASSERT(0, strcmp(M14(bar), "bar. foo"));
printf("OK\n");
return 0;
}