fix some fold and add def const

1 files changed, 6 insertions, 0 deletions

diff --git a/src/fmt.cff b/src/fmt.cff
index 6707222..39b9e5b 100644
--- a/src/fmt.cff
+++ b/src/fmt.cff
@@ -387,6 +387,12 @@ extern fn warn(P *Parser, loc Loc, fmt *const u8, ...) void {
 }
 
 extern fn err(P *Parser, loc Loc, fmt *const u8, ...) void {
+   P.error = #t;
+   static nerr int = 0;
+   if nerr++ == 20 {
+      efmt("Aborting due to too many errors.\n");
+      exit(1);
+   }
    let ap va_list #?;
    ap->start(fmt);
    vdiag(P, loc, "\e[31merror\e[0m", fmt, ap);