hare

commit 8e4d6609acde3fa7125f64dfbb7ef29a8e6e3f69
parent b842d1516027d1764c0fa2016ef4391dbe696757
Author: Noam Preil <noam@pixelhero.dev>
Date:   Thu,  1 Dec 2022 04:39:57 -0500

strings::template: reject left braces

Signed-off-by: Noam Preil <noam@pixelhero.dev>

Diffstat:
M
strings/template/README
 | 
2
+-
M
strings/template/template.ha
 | 
4
+++-

2 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/strings/template/README b/strings/template/README
@@ -7,7 +7,7 @@ names must be alphanumeric ASCII characters (i.e. for which [[ascii::isalnum]]
 returns true). A literal "$" may be printed by using it twice: "$$". Variables
 may also be used with braces, i.e. ${variable}, so that they can be placed
 immediately next to alphanumeric characters; such variables may include
-non-alphanumeric characters other than '}'.
+non-alphanumeric characters other than '{' and '}'.
 
 	const src = "Hello, $user! Your balance is $$$balance.\n";
 	const template = template::compile(src)!;
diff --git a/strings/template/template.ha b/strings/template/template.ha
@@ -132,7 +132,9 @@ fn parse_variable(
 		};
 
 		if (brace) {
-			if (rn != '}') {
+			if (rn == '{') {
+				return errors::invalid;
+			} else if (rn != '}') {
 				strio::appendrune(buf, rn)!;
 			} else {
 				break;