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/*
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/FlyString.h>
#include <LibJS/Runtime/StringOrSymbol.h>
namespace JS {
class PropertyName {
public:
enum class Type {
Invalid,
Number,
String,
Symbol,
};
static PropertyName from_value(GlobalObject& global_object, Value value)
{
if (value.is_empty())
return {};
if (value.is_symbol())
return &value.as_symbol();
if (value.is_integer() && value.as_i32() >= 0)
return value.as_i32();
auto string = value.to_string(global_object);
if (string.is_null())
return {};
return string;
}
PropertyName() { }
PropertyName(i32 index)
: m_type(Type::Number)
, m_number(index)
{
VERIFY(index >= 0);
}
PropertyName(const char* chars)
: m_type(Type::String)
, m_string(FlyString(chars))
{
}
PropertyName(const String& string)
: m_type(Type::String)
, m_string(FlyString(string))
{
VERIFY(!string.is_null());
}
PropertyName(const FlyString& string)
: m_type(Type::String)
, m_string(string)
{
VERIFY(!string.is_null());
}
PropertyName(Symbol* symbol)
: m_type(Type::Symbol)
, m_symbol(symbol)
{
VERIFY(symbol);
}
PropertyName(const StringOrSymbol& string_or_symbol)
{
if (string_or_symbol.is_string()) {
m_string = string_or_symbol.as_string();
m_type = Type::String;
} else if (string_or_symbol.is_symbol()) {
m_symbol = const_cast<Symbol*>(string_or_symbol.as_symbol());
m_type = Type::Symbol;
}
}
bool is_valid() const { return m_type != Type::Invalid; }
bool is_number() const { return m_type == Type::Number; }
bool is_string() const { return m_type == Type::String; }
bool is_symbol() const { return m_type == Type::Symbol; }
u32 as_number() const
{
VERIFY(is_number());
return m_number;
}
const FlyString& as_string() const
{
VERIFY(is_string());
return m_string;
}
const Symbol* as_symbol() const
{
VERIFY(is_symbol());
return m_symbol;
}
String to_string() const
{
VERIFY(is_valid());
VERIFY(!is_symbol());
if (is_string())
return as_string();
return String::number(as_number());
}
StringOrSymbol to_string_or_symbol() const
{
VERIFY(is_valid());
VERIFY(!is_number());
if (is_string())
return StringOrSymbol(as_string());
return StringOrSymbol(as_symbol());
}
Value to_value(VM& vm) const
{
if (is_string())
return js_string(vm, m_string);
if (is_number())
return Value(m_number);
if (is_symbol())
return m_symbol;
return js_undefined();
}
private:
Type m_type { Type::Invalid };
FlyString m_string;
Symbol* m_symbol { nullptr };
u32 m_number { 0 };
};
}
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