54 lines
1.5 KiB
C++
54 lines
1.5 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: c++98, c++03, c++11
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// <experimental/tuple>
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// template <class F, class T> constexpr decltype(auto) apply(F &&, T &&)
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// Testing ref qualified functions
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#include <experimental/tuple>
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#include <cassert>
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struct func_obj
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{
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constexpr func_obj() {}
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constexpr int operator()() const & { return 1; }
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constexpr int operator()() const && { return 2; }
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constexpr int operator()() & { return 3; }
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constexpr int operator()() && { return 4; }
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};
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namespace ex = std::experimental;
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int main()
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{
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// TODO(ericwf): Re-enable constexpr support
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/*
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{
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constexpr func_obj f;
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constexpr std::tuple<> tp;
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static_assert(1 == ex::apply(static_cast<func_obj const &>(f), tp), "");
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static_assert(2 == ex::apply(static_cast<func_obj const &&>(f), tp), "");
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}
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*/
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{
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func_obj f;
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std::tuple<> tp;
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assert(1 == ex::apply(static_cast<func_obj const &>(f), tp));
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assert(2 == ex::apply(static_cast<func_obj const &&>(f), tp));
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assert(3 == ex::apply(static_cast<func_obj &>(f), tp));
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assert(4 == ex::apply(static_cast<func_obj &&>(f), tp));
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}
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}
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