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51 lines
1.6 KiB
C++
51 lines
1.6 KiB
C++
// -*- mode: C++; c-file-style: "cc-mode" -*-
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//*************************************************************************
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// DESCRIPTION: Verilator: Function traits for metaprogramming
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//
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// Code available from: https://verilator.org
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//
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//*************************************************************************
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//
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// Copyright 2003-2022 by Wilson Snyder. This program is free software; you
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// can redistribute it and/or modify it under the terms of either the GNU
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// Lesser General Public License Version 3 or the Perl Artistic License
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// Version 2.0.
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// SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
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//
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//*************************************************************************
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#ifndef VERILATOR_V3FUNCTIONTRAITS_H_
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#define VERILATOR_V3FUNCTIONTRAITS_H_
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#include "verilatedos.h"
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#include <stddef.h>
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#include <tuple>
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#include <type_traits>
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template <typename T>
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struct FunctionTraits;
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// For generic types, directly use the result of the signature of its 'operator()'
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template <typename T>
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struct FunctionTraits final
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: public FunctionTraits<decltype(&std::remove_reference<T>::type::operator())> {};
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// Specialization for pointers to member function
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template <typename ClassType, typename ReturnType, typename... Args>
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struct FunctionTraits<ReturnType (ClassType::*)(Args...) const> VL_NOT_FINAL {
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// Number of arguments
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static constexpr size_t arity = sizeof...(Args);
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// Type of result
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using result_type = ReturnType;
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// Type of arguments
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template <std::size_t I>
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struct arg {
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using type = typename std::tuple_element<I, std::tuple<Args...>>::type;
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};
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};
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#endif
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