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