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d1b58ee9ad
No need to instantiate unique symbols for each Interpreter; they can be VM-global. This reduces the memory cost and startup time anyway.
99 lines
3.5 KiB
C++
99 lines
3.5 KiB
C++
/*
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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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#include <LibJS/Interpreter.h>
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#include <LibJS/Runtime/Error.h>
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#include <LibJS/Runtime/GlobalObject.h>
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#include <LibJS/Runtime/SymbolConstructor.h>
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#include <LibJS/Runtime/SymbolObject.h>
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namespace JS {
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SymbolConstructor::SymbolConstructor(GlobalObject& global_object)
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: NativeFunction("Symbol", *global_object.function_prototype())
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{
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}
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void SymbolConstructor::initialize(GlobalObject& global_object)
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{
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NativeFunction::initialize(global_object);
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define_property("prototype", global_object.symbol_prototype(), 0);
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define_property("length", Value(0), Attribute::Configurable);
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define_native_function("for", for_, 1, Attribute::Writable | Attribute::Configurable);
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define_native_function("keyFor", key_for, 1, Attribute::Writable | Attribute::Configurable);
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#define __JS_ENUMERATE(SymbolName, snake_name) \
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define_property(#SymbolName, global_object.vm().well_known_symbol_##snake_name(), 0);
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JS_ENUMERATE_WELL_KNOWN_SYMBOLS
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#undef __JS_ENUMERATE
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}
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SymbolConstructor::~SymbolConstructor()
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{
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}
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Value SymbolConstructor::call(Interpreter& interpreter)
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{
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if (!interpreter.argument_count())
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return js_symbol(interpreter, "", false);
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return js_symbol(interpreter, interpreter.argument(0).to_string(interpreter), false);
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}
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Value SymbolConstructor::construct(Interpreter& interpreter, Function&)
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{
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interpreter.throw_exception<TypeError>(ErrorType::NotAConstructor, "Symbol");
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return {};
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}
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JS_DEFINE_NATIVE_FUNCTION(SymbolConstructor::for_)
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{
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String description;
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if (!interpreter.argument_count()) {
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description = "undefined";
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} else {
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description = interpreter.argument(0).to_string(interpreter);
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}
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return global_object.vm().get_global_symbol(description);
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}
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JS_DEFINE_NATIVE_FUNCTION(SymbolConstructor::key_for)
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{
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auto argument = interpreter.argument(0);
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if (!argument.is_symbol()) {
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interpreter.throw_exception<TypeError>(ErrorType::NotASymbol, argument.to_string_without_side_effects().characters());
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return {};
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}
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auto& symbol = argument.as_symbol();
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if (symbol.is_global())
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return js_string(interpreter, symbol.description());
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return js_undefined();
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}
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}
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