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LibJS: Add symbol objects
This commit adds the following classes: SymbolObject, SymbolConstructor, SymbolPrototype, and Symbol. This commit does not introduce any new functionality to the Object class, so they cannot be used as property keys in objects.
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21 changed files with 819 additions and 3 deletions
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Libraries/LibJS/Runtime/Symbol.h
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Libraries/LibJS/Runtime/Symbol.h
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/*
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* Copyright (c) 2020, Matthew Olsson <matthewcolsson@gmail.com>
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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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#pragma once
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#include <AK/String.h>
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#include <LibJS/Runtime/Cell.h>
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namespace JS {
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class Symbol final : public Cell {
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public:
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Symbol(String, bool);
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virtual ~Symbol();
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const String& description() const { return m_description; }
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bool is_global() const { return m_is_global; }
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const String to_string() const { return String::format("Symbol(%s)", description().characters()); }
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private:
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virtual const char* class_name() const override { return "Symbol"; }
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const String m_description;
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const bool m_is_global;
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};
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Symbol* js_symbol(Heap&, String description, bool is_global);
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Symbol* js_symbol(Interpreter&, String description, bool is_global);
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}
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