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LibJS: Implement RegExp.prototype [ @@search ]

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String.prototype.search is already implemented, but relies on the well-
known Symbol.search, which was not implemented.
This commit is contained in:
Timothy Flynn 2021-07-07 15:18:20 -04:00 • committed by Linus Groh
parent aaf5339fae
commit 35a2ba8ed8
3 changed files with 97 additions and 0 deletions
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49
Userland/Libraries/LibJS/Runtime/RegExpPrototype.cpp
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@ -32,6 +32,7 @@ void RegExpPrototype::initialize(GlobalObject& global_object)
define_native_function(*vm.well_known_symbol_match(), symbol_match, 1, attr);
define_native_function(*vm.well_known_symbol_replace(), symbol_replace, 2, attr);
define_native_function(*vm.well_known_symbol_search(), symbol_search, 1, attr);
define_native_accessor(vm.names.flags, flags, {}, Attribute::Configurable);
define_native_accessor(vm.names.source, source, {}, Attribute::Configurable);
@ -541,4 +542,52 @@ JS_DEFINE_NATIVE_FUNCTION(RegExpPrototype::symbol_replace)
return js_string(vm, builder.build());
}
// 22.2.5.11 RegExp.prototype [ @@search ] ( string ), https://tc39.es/ecma262/#sec-regexp.prototype-@@search
JS_DEFINE_NATIVE_FUNCTION(RegExpPrototype::symbol_search)
{
auto string_value = vm.argument(0);
auto* regexp_object = this_object_from(vm, global_object);
if (!regexp_object)
return {};
auto string = string_value.to_string(global_object);
if (vm.exception())
return {};
auto previous_last_index = regexp_object->get(vm.names.lastIndex);
if (vm.exception())
return {};
if (!same_value(previous_last_index, Value(0))) {
regexp_object->set(vm.names.lastIndex, Value(0), true);
if (vm.exception())
return {};
}
auto result = regexp_exec(global_object, *regexp_object, string);
if (vm.exception())
return {};
auto current_last_index = regexp_object->get(vm.names.lastIndex);
if (vm.exception())
return {};
if (!same_value(current_last_index, previous_last_index)) {
regexp_object->set(vm.names.lastIndex, previous_last_index, true);
if (vm.exception())
return {};
}
if (result.is_null())
return Value(-1);
auto* result_object = result.to_object(global_object);
if (!result_object)
return {};
auto index = result_object->get(vm.names.index);
if (vm.exception())
return {};
return index;
}
}

1
Userland/Libraries/LibJS/Runtime/RegExpPrototype.h
View file

@ -27,6 +27,7 @@ private:
JS_DECLARE_NATIVE_FUNCTION(to_string);
JS_DECLARE_NATIVE_FUNCTION(symbol_match);
JS_DECLARE_NATIVE_FUNCTION(symbol_replace);
JS_DECLARE_NATIVE_FUNCTION(symbol_search);
#define __JS_ENUMERATE(_, flag_name, ...) \
JS_DECLARE_NATIVE_GETTER(flag_name);