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23 lines
559 B
C++
23 lines
559 B
C++
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#pragma once
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/*
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Dark template magic from https://www.modernescpp.com/index.php/visiting-a-std-variant-with-the-overload-pattern
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Usage :
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std::variant<char, int, float> var = 2017;
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auto TypeOfIntegral = VariantVisitor {
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[](char) { return "char"; },
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[](int) { return "int"; },
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[](auto) { return "unknown type"; },
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};
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std::visit(TypeOfIntegral, var);
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*/
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template<typename ... Ts>
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struct VariantVisitor : Ts ... {
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using Ts::operator() ...;
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};
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template<class... Ts> VariantVisitor(Ts...) -> VariantVisitor<Ts...>;
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