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LibJS: Add spec comments to Value::is_regexp()

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Linus Groh 2022-12-09 23:55:28 +00:00
parent b11135cbc2
commit 1fe7984160
Notes: sideshowbarker 2024-07-17 03:33:27 +09:00 
Author: https://github.com/linusg
Commit: https://github.com/SerenityOS/serenity/commit/1fe7984160
Pull-request: https://github.com/SerenityOS/serenity/pull/16405
Reviewed-by: https://github.com/davidot ✅
1 changed files with 6 additions and 0 deletions
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6
Userland/Libraries/LibJS/Runtime/Value.cpp
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@ -277,13 +277,19 @@ bool Value::is_constructor() const
// 7.2.8 IsRegExp ( argument ), https://tc39.es/ecma262/#sec-isregexp
ThrowCompletionOr<bool> Value::is_regexp(VM& vm) const
{
// 1. If argument is not an Object, return false.
if (!is_object())
return false;
// 2. Let matcher be ? Get(argument, @@match).
auto matcher = TRY(as_object().get(*vm.well_known_symbol_match()));
// 3. If matcher is not undefined, return ToBoolean(matcher).
if (!matcher.is_undefined())
return matcher.to_boolean();
// 4. If argument has a [[RegExpMatcher]] internal slot, return true.
// 5. Return false.
return is<RegExpObject>(as_object());
}