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LibJS: Add symbol objects

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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.
This commit is contained in:
mattco98 2020-04-29 23:25:21 -07:00 • committed by Andreas Kling
parent b5b08fba92
commit 4ced126704
21 changed files with 819 additions and 3 deletions
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95
Libraries/LibJS/Runtime/SymbolObject.h Normal file
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/*
* 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.
*/
#pragma once
#include <LibJS/Runtime/Object.h>
#include <LibJS/Runtime/Symbol.h>
namespace JS {
class SymbolObject : public Object {
public:
static SymbolObject* create(GlobalObject&, Symbol&);
SymbolObject(Symbol&, Object& prototype);
virtual ~SymbolObject() override;
Symbol& primitive_symbol() { return m_symbol; }
const Symbol& primitive_symbol() const { return m_symbol; }
const String& description() const { return m_symbol.description(); }
bool is_global() const { return m_symbol.is_global(); }
static Value get_global(Interpreter&, String description);
virtual Value value_of() const override
{
return Value(&m_symbol);
}
static void initialize_well_known_symbols(Interpreter&);
static void gather_symbol_roots(HashTable<Cell*>& roots);
static Value well_known_iterator() { return s_well_known_iterator; };
static Value well_known_async_terator() { return s_well_known_async_terator; };
static Value well_known_match() { return s_well_known_match; };
static Value well_known_match_all() { return s_well_known_match_all; };
static Value well_known_replace() { return s_well_known_replace; };
static Value well_known_search() { return s_well_known_search; };
static Value well_known_split() { return s_well_known_split; };
static Value well_known_has_instance() { return s_well_known_has_instance; };
static Value well_known_is_concat_spreadable() { return s_well_known_is_concat_spreadable; };
static Value well_known_unscopables() { return s_well_known_unscopables; };
static Value well_known_species() { return s_well_known_species; };
static Value well_known_to_primtive() { return s_well_known_to_primtive; };
static Value well_known_to_string_tag() { return s_well_known_to_string_tag; };
private:
virtual void visit_children(Visitor&) override;
virtual const char* class_name() const override { return "SymbolObject"; }
virtual bool is_symbol_object() const override { return true; }
Symbol& m_symbol;
static HashMap<String, Value> s_global_symbol_map;
static Value s_well_known_iterator;
static Value s_well_known_async_terator;
static Value s_well_known_match;
static Value s_well_known_match_all;
static Value s_well_known_replace;
static Value s_well_known_search;
static Value s_well_known_split;
static Value s_well_known_has_instance;
static Value s_well_known_is_concat_spreadable;
static Value s_well_known_unscopables;
static Value s_well_known_species;
static Value s_well_known_to_primtive;
static Value s_well_known_to_string_tag;
};
}