Disallow empty capture groups

hlysine · Aug 19, 2023 · 97a820b · 97a820b
1 parent 03288d5
commit 97a820b
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/src/modifiers/CaptureModifier.ts b/src/modifiers/CaptureModifier.ts
@@ -9,6 +9,7 @@ export default class CaptureModifier implements RegExpModifier {
   }
 
   public modify(regExp: string): [string, string?] {
+    if (regExp.length === 0) throw new Error('Empty capture group');
     if (isBracketGroup(regExp) && regExp.startsWith('(?:')) {
       if (this.name === undefined) return ['(' + regExp.substring(3)];
       return [`(?<${this.name}>` + regExp.substring(3)];