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/*
* Copyright (c) 2020, Matthew Olsson <mattco@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibJS/Runtime/Error.h>
#include <LibJS/Runtime/GlobalObject.h>
#include <LibJS/Runtime/RegExpConstructor.h>
#include <LibJS/Runtime/RegExpObject.h>
namespace JS {
RegExpConstructor::RegExpConstructor(Realm& realm)
: NativeFunction(realm.vm().names.RegExp.as_string(), *realm.intrinsics().function_prototype())
{
}
void RegExpConstructor::initialize(Realm& realm)
{
auto& vm = this->vm();
NativeFunction::initialize(realm);
// 22.2.4.1 RegExp.prototype, https://tc39.es/ecma262/#sec-regexp.prototype
define_direct_property(vm.names.prototype, realm.intrinsics().regexp_prototype(), 0);
define_native_accessor(realm, *vm.well_known_symbol_species(), symbol_species_getter, {}, Attribute::Configurable);
define_direct_property(vm.names.length, Value(2), Attribute::Configurable);
}
// 22.2.3.1 RegExp ( pattern, flags ), https://tc39.es/ecma262/#sec-regexp-pattern-flags
ThrowCompletionOr<Value> RegExpConstructor::call()
{
auto& vm = this->vm();
auto pattern = vm.argument(0);
auto flags = vm.argument(1);
bool pattern_is_regexp = TRY(pattern.is_regexp(vm));
if (pattern_is_regexp && flags.is_undefined()) {
auto pattern_constructor = TRY(pattern.as_object().get(vm.names.constructor));
if (same_value(this, pattern_constructor))
return pattern;
}
return TRY(construct(*this));
}
// 22.2.3.1 RegExp ( pattern, flags ), https://tc39.es/ecma262/#sec-regexp-pattern-flags
ThrowCompletionOr<Object*> RegExpConstructor::construct(FunctionObject&)
{
auto& vm = this->vm();
auto pattern = vm.argument(0);
auto flags = vm.argument(1);
bool pattern_is_regexp = TRY(pattern.is_regexp(vm));
Value pattern_value;
Value flags_value;
if (pattern.is_object() && is<RegExpObject>(pattern.as_object())) {
auto& regexp_pattern = static_cast<RegExpObject&>(pattern.as_object());
pattern_value = js_string(vm, regexp_pattern.pattern());
if (flags.is_undefined())
flags_value = js_string(vm, regexp_pattern.flags());
else
flags_value = flags;
} else if (pattern_is_regexp) {
pattern_value = TRY(pattern.as_object().get(vm.names.source));
if (flags.is_undefined()) {
flags_value = TRY(pattern.as_object().get(vm.names.flags));
} else {
flags_value = flags;
}
} else {
pattern_value = pattern;
flags_value = flags;
}
return TRY(regexp_create(vm, pattern_value, flags_value));
}
// 22.2.4.2 get RegExp [ @@species ], https://tc39.es/ecma262/#sec-get-regexp-@@species
JS_DEFINE_NATIVE_FUNCTION(RegExpConstructor::symbol_species_getter)
{
return vm.this_value();
}
}
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