From 6ec6fa1a02d1eba0945b37e86fdbf850446eb97b Mon Sep 17 00:00:00 2001 From: Andreas Kling Date: Wed, 11 Mar 2020 18:55:54 +0100 Subject: [PATCH] LibJS: Add StringObject, an Object wrapper around primitive strings This object will (soon) be implicitly created to wrap a primitive string when one is used in a context that requires an object. --- Libraries/LibJS/Makefile | 1 + Libraries/LibJS/StringObject.cpp | 49 ++++++++++++++++++++++++++++++++ Libraries/LibJS/StringObject.h | 45 +++++++++++++++++++++++++++++ 3 files changed, 95 insertions(+) create mode 100644 Libraries/LibJS/StringObject.cpp create mode 100644 Libraries/LibJS/StringObject.h diff --git a/Libraries/LibJS/Makefile b/Libraries/LibJS/Makefile index 0ee4ad38d4..d1c7452397 100644 --- a/Libraries/LibJS/Makefile +++ b/Libraries/LibJS/Makefile @@ -7,6 +7,7 @@ OBJS = \ Interpreter.o \ Object.o \ PrimitiveString.o \ + StringObject.o \ Value.o LIBRARY = libjs.a diff --git a/Libraries/LibJS/StringObject.cpp b/Libraries/LibJS/StringObject.cpp new file mode 100644 index 0000000000..f8b14d1d8b --- /dev/null +++ b/Libraries/LibJS/StringObject.cpp @@ -0,0 +1,49 @@ +/* + * Copyright (c) 2020, Andreas Kling + * 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 +#include +#include + +namespace JS { + +StringObject::StringObject(PrimitiveString* string) + : m_string(string) +{ + put("length", Value(static_cast(m_string->string().length()))); +} + +StringObject::~StringObject() +{ +} + +void StringObject::visit_children(Cell::Visitor& visitor) +{ + Object::visit_children(visitor); + visitor.visit(m_string); +} + +} diff --git a/Libraries/LibJS/StringObject.h b/Libraries/LibJS/StringObject.h new file mode 100644 index 0000000000..3a9ccfc990 --- /dev/null +++ b/Libraries/LibJS/StringObject.h @@ -0,0 +1,45 @@ +/* + * Copyright (c) 2020, Andreas Kling + * 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 + +namespace JS { + +class StringObject final : public Object { +public: + explicit StringObject(PrimitiveString*); + virtual ~StringObject() override; + + virtual void visit_children(Visitor&) override; + +private: + virtual const char* class_name() const override { return "StringObject"; } + PrimitiveString* m_string { nullptr }; +}; + +}