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[GNU] Add __COUNTER__ macro

This commit is contained in:
Rui Ueyama 2020-06-09 01:40:02 +09:00
parent e27417fcde
commit 0e77f3dff8
2 changed files with 11 additions and 0 deletions
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7
preprocess.c
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@ -856,6 +856,12 @@ static Token *line_macro(Token *tmpl) {
return new_num_token(tmpl->line_no, tmpl);
}
// __COUNTER__ is expanded to serial values starting from 0.
static Token *counter_macro(Token *tmpl) {
static int i = 0;
return new_num_token(i++, tmpl);
}
// __DATE__ is expanded to the current date, e.g. "May 17 2020".
static char *format_date(struct tm *tm) {
static char mon[][4] = {
@ -917,6 +923,7 @@ void init_macros(void) {
add_builtin("__FILE__", file_macro);
add_builtin("__LINE__", line_macro);
add_builtin("__COUNTER__", counter_macro);
time_t now = time(NULL);
struct tm *tm = localtime(&now);

4
test/macro.c
View File

@ -369,6 +369,10 @@ int main() {
ASSERT(11, strlen(__DATE__));
ASSERT(8, strlen(__TIME__));
ASSERT(0, __COUNTER__);
ASSERT(1, __COUNTER__);
ASSERT(2, __COUNTER__);
printf("OK\n");
return 0;
}