ladybird/Libraries/LibJS/Runtime/RegExpConstructor.cpp

/*
 * Copyright (c) 2020, Matthew Olsson <matthewcolsson@gmail.com>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this
 *    list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <LibJS/Interpreter.h>
#include <LibJS/Runtime/Error.h>
#include <LibJS/Runtime/GlobalObject.h>
#include <LibJS/Runtime/RegExpConstructor.h>
#include <LibJS/Runtime/RegExpObject.h>

namespace JS {

RegExpConstructor::RegExpConstructor(GlobalObject& global_object)
    : NativeFunction("RegExp", *global_object.function_prototype())
{
}

void RegExpConstructor::initialize(GlobalObject& global_object)
{
    NativeFunction::initialize(global_object);
    define_property("prototype", global_object.regexp_prototype(), 0);
    define_property("length", Value(2), Attribute::Configurable);
}

RegExpConstructor::~RegExpConstructor()
{
}

Value RegExpConstructor::call(Interpreter& interpreter)
{
    return construct(interpreter, *this);
}

Value RegExpConstructor::construct(Interpreter& interpreter, Function&)
{
    if (!interpreter.argument_count())
        return RegExpObject::create(global_object(), "(?:)", "");
    auto contents = interpreter.argument(0).to_string(interpreter);
    if (interpreter.exception())
        return {};
    auto flags = interpreter.argument_count() > 1 ? interpreter.argument(1).to_string(interpreter) : "";
    if (interpreter.exception())
        return {};
    return RegExpObject::create(global_object(), contents, flags);
}

}