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LibJS: Add spec comments to RegExp.prototype [ @@search ]

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Timothy Flynn 2021-12-17 14:55:19 -05:00 • committed by Linus Groh
parent 25b6e79238
commit cb901f70af
1 changed files with 22 additions and 6 deletions
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28
Userland/Libraries/LibJS/Runtime/RegExpPrototype.cpp
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@ -664,24 +664,40 @@ JS_DEFINE_NATIVE_FUNCTION(RegExpPrototype::symbol_replace)
// 22.2.5.11 RegExp.prototype [ @@search ] ( string ), https://tc39.es/ecma262/#sec-regexp.prototype-@@search
JS_DEFINE_NATIVE_FUNCTION(RegExpPrototype::symbol_search)
{
// 1. Let rx be the this value.
// 2. If Type(rx) is not Object, throw a TypeError exception.
auto* regexp_object = TRY(this_object(global_object));
// 3. Let S be ? ToString(string).
auto string = TRY(vm.argument(0).to_utf16_string(global_object));
// 4. Let previousLastIndex be ? Get(rx, "lastIndex").
auto previous_last_index = TRY(regexp_object->get(vm.names.lastIndex));
if (!same_value(previous_last_index, Value(0)))
TRY(regexp_object->set(vm.names.lastIndex, Value(0), Object::ShouldThrowExceptions::Yes));
// 5. If SameValue(previousLastIndex, +0𝔽) is false, then
if (!same_value(previous_last_index, Value(0))) {
// a. Perform ? Set(rx, "lastIndex", +0𝔽, true).
TRY(regexp_object->set(vm.names.lastIndex, Value(0), Object::ShouldThrowExceptions::Yes));
}
// 6. Let result be ? RegExpExec(rx, S).
auto result = TRY(regexp_exec(global_object, *regexp_object, move(string)));
// 7. Let currentLastIndex be ? Get(rx, "lastIndex").
auto current_last_index = TRY(regexp_object->get(vm.names.lastIndex));
if (!same_value(current_last_index, previous_last_index))
TRY(regexp_object->set(vm.names.lastIndex, previous_last_index, Object::ShouldThrowExceptions::Yes));
// 8. If SameValue(currentLastIndex, previousLastIndex) is false, then
if (!same_value(current_last_index, previous_last_index)) {
// a. Perform ? Set(rx, "lastIndex", previousLastIndex, true).
TRY(regexp_object->set(vm.names.lastIndex, previous_last_index, Object::ShouldThrowExceptions::Yes));
}
// 9. If result is null, return -1𝔽.
if (result.is_null())
return Value(-1);
auto* result_object = TRY(result.to_object(global_object));
return TRY(result_object->get(vm.names.index));
// 10. Return ? Get(result, "index").
return TRY(result.get(global_object, vm.names.index));
}
// 22.2.5.13 RegExp.prototype [ @@split ] ( string, limit ), https://tc39.es/ecma262/#sec-regexp.prototype-@@split