hare

commit f09e65c5c66fcfc6472bd85a050175c0fef98a37
parent 7a559c1b9f753308b96da769e4ed14313592fe18
Author: Bor Grošelj Simić <bor.groseljsimic@telemach.net>
Date:   Tue, 25 Jan 2022 04:44:04 +0100

fmt: print a diagnostic message if there aren't enough parameters

instead of just aborting with the generic OOB message

Signed-off-by: Bor Grošelj Simić <bor.groseljsimic@telemach.net>

Diffstat:
M
fmt/fmt.ha
 | 
13
++++++++-----

1 file changed, 8 insertions(+), 5 deletions(-)
diff --git a/fmt/fmt.ha b/fmt/fmt.ha
@@ -184,19 +184,22 @@ export fn fprintf(
 				yield r;
 			};
 
-			let arg = if (r == '{') {
+			if (r == '{') {
 				n += io::write(h, utf8::encoderune('{'))?;
 				continue;
-			} else if (ascii::isdigit(r)) {
+			};
+
+			const idx = if (ascii::isdigit(r)) {
 				strings::push(&iter, r);
-				yield args[scan_uint(&iter)];
+				yield scan_uint(&iter): size;
 			} else {
 				strings::push(&iter, r);
 				i += 1;
-				yield args[i - 1];
+				yield i - 1;
 			};
+			assert(idx < len(args), "Not enough parameters given");
 
-			const arg = match (arg) {
+			const arg = match (args[idx]) {
 			case let arg: formattable =>
 				yield arg;
 			case =>