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LibJS: Add ArrayPrototype and implement Array.prototype.push()

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This function is ultimately supposed to be generic and allow any |this|
that has a length property, but for now it only works on our own Array
object type.
This commit is contained in:
Andreas Kling 2020-03-20 21:01:36 +01:00
parent 8f7d4f67a4
commit bceabd7c4b
9 changed files with 110 additions and 4 deletions
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4
Libraries/LibJS/Runtime/Array.cpp
View file

@ -25,12 +25,14 @@
*/
#include <AK/Function.h>
#include <LibJS/Interpreter.h>
#include <LibJS/Runtime/Array.h>
namespace JS {
Array::Array()
{
set_prototype(interpreter().array_prototype());
put_native_property(
"length",
[this](Object*) {
@ -45,7 +47,7 @@ Array::~Array()
{
}
void Array::append(Value value)
void Array::push(Value value)
{
m_elements.append(value);
}

2
Libraries/LibJS/Runtime/Array.h
View file

@ -39,7 +39,7 @@ public:
const Vector<Value>& elements() const { return m_elements; }
Vector<Value>& elements() { return m_elements; }
void append(Value);
void push(Value);
private:
virtual const char* class_name() const override { return "Array"; }

52
Libraries/LibJS/Runtime/ArrayPrototype.cpp Normal file
View file

@ -0,0 +1,52 @@
/*
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
* 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 <AK/Function.h>
#include <LibJS/Heap/Heap.h>
#include <LibJS/Interpreter.h>
#include <LibJS/Runtime/Array.h>
#include <LibJS/Runtime/ArrayPrototype.h>
#include <LibJS/Runtime/Value.h>
namespace JS {
ArrayPrototype::ArrayPrototype()
{
put_native_function("push", [](Object* this_object, const Vector<Value>& arguments) -> Value {
if (arguments.is_empty())
return js_undefined();
ASSERT(this_object);
ASSERT(this_object->is_array());
static_cast<Array*>(this_object)->push(arguments[0]);
return Value(static_cast<const Array*>(this_object)->length());
});
}
ArrayPrototype::~ArrayPrototype()
{
}
}

42
Libraries/LibJS/Runtime/ArrayPrototype.h Normal file
View file

@ -0,0 +1,42 @@
/*
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
* 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.
*/
#pragma once
#include <LibJS/Runtime/Object.h>
namespace JS {
class ArrayPrototype final : public Object {
public:
ArrayPrototype();
virtual ~ArrayPrototype() override;
private:
virtual const char* class_name() const override { return "ArrayPrototype"; }
};
}