4d22a142f7
This commits makes effort towards tolerating some of javascript's quirks when it comes to its type system, note that the interpreter's way of handling type coercion is still not mature at all, for example, we still have to implement NaN instead of just crashing when trying to parse a string and failing.
120 lines
3.7 KiB
C++
120 lines
3.7 KiB
C++
/*
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* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <AK/String.h>
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#include <LibJS/Heap.h>
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#include <LibJS/Interpreter.h>
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#include <LibJS/NativeFunction.h>
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#include <LibJS/NativeProperty.h>
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#include <LibJS/Object.h>
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#include <LibJS/Value.h>
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namespace JS {
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Object::Object()
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{
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set_prototype(interpreter().object_prototype());
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}
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Object::~Object()
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{
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}
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Value Object::get(String property_name) const
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{
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const Object* object = this;
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while (object) {
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auto value = object->m_properties.get(property_name);
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if (value.has_value()) {
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if (value.value().is_object() && value.value().as_object()->is_native_property())
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return static_cast<const NativeProperty*>(value.value().as_object())->get(const_cast<Object*>(this));
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return value.value();
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}
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object = object->prototype();
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}
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return js_undefined();
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}
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void Object::put(String property_name, Value value)
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{
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m_properties.set(property_name, move(value));
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}
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void Object::put_native_function(String property_name, AK::Function<Value(Object*, Vector<Value>)> native_function)
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{
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put(property_name, heap().allocate<NativeFunction>(move(native_function)));
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}
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void Object::put_native_property(String property_name, AK::Function<Value(Object*)> getter, AK::Function<void(Object*, Value)> setter)
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{
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put(property_name, heap().allocate<NativeProperty>(move(getter), move(setter)));
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}
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void Object::visit_children(Cell::Visitor& visitor)
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{
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Cell::visit_children(visitor);
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if (m_prototype)
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visitor.visit(m_prototype);
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for (auto& it : m_properties)
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visitor.visit(it.value);
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}
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bool Object::has_own_property(const String& property_name) const
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{
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return m_properties.get(property_name).has_value();
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}
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Value Object::to_primitive(PreferredType preferred_type) const
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{
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Value result = js_undefined();
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switch (preferred_type) {
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case PreferredType::Default:
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case PreferredType::Number: {
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result = value_of();
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if (result.is_object()) {
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result = to_string();
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}
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break;
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}
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case PreferredType::String: {
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result = to_string();
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if (result.is_object())
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result = value_of();
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break;
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}
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}
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ASSERT(!result.is_object());
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return result;
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}
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Value Object::to_string() const
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{
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return js_string(heap(), String::format("[object %s]", class_name()));
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}
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}
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