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/*
* VariantIdentifier.h, part of VCMI engine
*
* Authors: listed in file AUTHORS in main folder
*
* License: GNU General Public License v2.0 or later
* Full text of license available in license.txt file, in main folder
*
*/
#pragma once
#include "IdentifierBase.h"
VCMI_LIB_NAMESPACE_BEGIN
/// This class represents field that may contain value of multiple different identifier types
template<typename... Types>
class VariantIdentifier
{
using Type = std::variant<Types...>;
Type value;
public:
VariantIdentifier()
{}
template<typename IdentifierType>
VariantIdentifier(const IdentifierType & identifier)
: value(identifier)
{}
int32_t getNum() const
{
int32_t result;
std::visit([&result] (const auto& v) { result = v.getNum(); }, value);
return result;
}
std::string toString() const
{
std::string result;
std::visit([&result] (const auto& v) { result = v.encode(v.getNum()); }, value);
return result;
}
template<typename IdentifierType>
IdentifierType as() const
{
auto * result = std::get_if<IdentifierType>(&value);
if (result)
return *result;
else
return IdentifierType();
}
bool hasValue() const
{
bool result = false;
std::visit([&result] (const auto& v) { result = v.hasValue(); }, value);
return result;
}
template <typename Handler> void serialize(Handler &h)
{
h & value;
}
bool operator == (const VariantIdentifier & other) const
{
return value == other.value;
}
bool operator != (const VariantIdentifier & other) const
{
return value != other.value;
}
bool operator < (const VariantIdentifier & other) const
{
return value < other.value;
}
};
VCMI_LIB_NAMESPACE_END
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