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Libraries: Move to Userland/Libraries/
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1857 changed files with 266 additions and 274 deletions
163
Userland/Libraries/LibJS/Runtime/PropertyName.h
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163
Userland/Libraries/LibJS/Runtime/PropertyName.h
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/*
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* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
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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/FlyString.h>
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#include <LibJS/Runtime/StringOrSymbol.h>
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namespace JS {
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class PropertyName {
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public:
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enum class Type {
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Invalid,
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Number,
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String,
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Symbol,
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};
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static PropertyName from_value(GlobalObject& global_object, Value value)
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{
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if (value.is_empty())
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return {};
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if (value.is_symbol())
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return &value.as_symbol();
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if (value.is_integer() && value.as_i32() >= 0)
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return value.as_i32();
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auto string = value.to_string(global_object);
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if (string.is_null())
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return {};
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return string;
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}
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PropertyName() { }
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PropertyName(i32 index)
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: m_type(Type::Number)
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, m_number(index)
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{
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ASSERT(index >= 0);
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}
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PropertyName(const char* chars)
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: m_type(Type::String)
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, m_string(FlyString(chars))
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{
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}
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PropertyName(const String& string)
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: m_type(Type::String)
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, m_string(FlyString(string))
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{
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ASSERT(!string.is_null());
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}
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PropertyName(const FlyString& string)
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: m_type(Type::String)
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, m_string(string)
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{
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ASSERT(!string.is_null());
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}
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PropertyName(Symbol* symbol)
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: m_type(Type::Symbol)
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, m_symbol(symbol)
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{
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ASSERT(symbol);
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}
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PropertyName(const StringOrSymbol& string_or_symbol)
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{
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if (string_or_symbol.is_string()) {
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m_string = string_or_symbol.as_string();
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m_type = Type::String;
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} else if (string_or_symbol.is_symbol()) {
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m_symbol = const_cast<Symbol*>(string_or_symbol.as_symbol());
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m_type = Type::Symbol;
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}
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}
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bool is_valid() const { return m_type != Type::Invalid; }
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bool is_number() const { return m_type == Type::Number; }
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bool is_string() const { return m_type == Type::String; }
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bool is_symbol() const { return m_type == Type::Symbol; }
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i32 as_number() const
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{
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ASSERT(is_number());
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return m_number;
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}
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const FlyString& as_string() const
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{
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ASSERT(is_string());
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return m_string;
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}
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const Symbol* as_symbol() const
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{
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ASSERT(is_symbol());
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return m_symbol;
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}
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String to_string() const
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{
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ASSERT(is_valid());
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ASSERT(!is_symbol());
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if (is_string())
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return as_string();
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return String::number(as_number());
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}
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StringOrSymbol to_string_or_symbol() const
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{
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ASSERT(is_valid());
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ASSERT(!is_number());
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if (is_string())
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return StringOrSymbol(as_string());
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return StringOrSymbol(as_symbol());
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}
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Value to_value(VM& vm) const
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{
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if (is_string())
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return js_string(vm, m_string);
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if (is_number())
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return Value(m_number);
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if (is_symbol())
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return m_symbol;
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return js_undefined();
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}
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private:
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Type m_type { Type::Invalid };
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FlyString m_string;
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Symbol* m_symbol { nullptr };
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u32 m_number { 0 };
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};
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}
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