More constant expressions

1 files changed, 6 insertions, 2 deletions

diff --git a/util/err.c b/util/err.c
index 0bd6424..5ff28ad 100644
--- a/util/err.c
+++ b/util/err.c
@@ -72,13 +72,17 @@ static void err_vprint(Location where, const char *fmt, va_list args) {
 	err_print_footer_(where.code);
 }
 
-static void err_print(Location where, const char *fmt, ...) {
-	va_list args;
+static void err_print_(int line, const char *file, Location where, const char *fmt, ...) {
+    va_list args;
+	if (file)
+		err_fprint("Generated by line %d of %s:\n", line, file);
 	va_start(args, fmt);
 	err_vprint(where, fmt, args);
 	va_end(args);
 }
 
+#define err_print(...) err_print_(__LINE__, __FILE__, __VA_ARGS__)
+
 static void info_print(Location where, const char *fmt, ...) {
 	va_list args;
 	va_start(args, fmt);