MatchVariant.hpp

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/*
 * Copyright 2026 Helge Bahmann <hcb@chaoticmind.net>
 * See COPYING for terms of redistribution.
 */
 
#ifndef JLM_RVSDG_MATCH_VARIANT_HPP
#define JLM_RVSDG_MATCH_VARIANT_HPP
 
#include <variant>
 
namespace jlm::rvsdg
{
 
namespace
{
// The usual C++ "overloaded" pattern & deduction pattern.
template<class... Ts>
struct Overloaded : Ts...
{
  using Ts::operator()...;
};
template<class... Ts>
Overloaded(Ts...) -> Overloaded<Ts...>;
}
 
template<typename T, typename... Fns>
decltype(auto)
MatchVariant(T && obj, Fns &&... fns)
{
  return std::visit(Overloaded{ std::forward<Fns>(fns)... }, std::forward<T>(obj));
}
 
}
 
#endif