| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // <functional> |
| |
| // result_of<Fn(ArgTypes...)> |
| |
| #include <type_traits> |
| #include <memory> |
| #include <cassert> |
| #include "test_macros.h" |
| |
| struct S |
| { |
| typedef short (*FreeFunc)(long); |
| operator FreeFunc() const; |
| double operator()(char, int&); |
| double const& operator()(char, int&) const; |
| double volatile& operator()(char, int&) volatile; |
| double const volatile& operator()(char, int&) const volatile; |
| }; |
| |
| |
| struct SD : public S { }; |
| |
| struct NotDerived {}; |
| |
| template <class Tp> |
| struct Voider { |
| typedef void type; |
| }; |
| |
| template <class T, class = void> |
| struct HasType : std::false_type {}; |
| |
| template <class T> |
| struct HasType<T, typename Voider<typename T::type>::type> : std::true_type {}; |
| |
| #if TEST_STD_VER > 14 |
| template <typename T, typename U> |
| struct test_invoke_result; |
| |
| template <typename Fn, typename ...Args, typename Ret> |
| struct test_invoke_result<Fn(Args...), Ret> |
| { |
| static void call() |
| { |
| static_assert(std::is_invocable<Fn, Args...>::value, ""); |
| static_assert(std::is_invocable_r<Ret, Fn, Args...>::value, ""); |
| ASSERT_SAME_TYPE(Ret, typename std::invoke_result<Fn, Args...>::type); |
| } |
| }; |
| #endif |
| |
| template <class T, class U> |
| void test_result_of() |
| { |
| ASSERT_SAME_TYPE(U, typename std::result_of<T>::type); |
| #if TEST_STD_VER > 14 |
| test_invoke_result<T, U>::call(); |
| #endif |
| } |
| |
| #if TEST_STD_VER > 14 |
| template <typename T> |
| struct test_invoke_no_result; |
| |
| template <typename Fn, typename ...Args> |
| struct test_invoke_no_result<Fn(Args...)> |
| { |
| static void call() |
| { |
| static_assert(std::is_invocable<Fn, Args...>::value == false, ""); |
| static_assert((!HasType<std::invoke_result<Fn, Args...> >::value), ""); |
| } |
| }; |
| #endif |
| |
| template <class T> |
| void test_no_result() |
| { |
| #if TEST_STD_VER >= 11 |
| static_assert((!HasType<std::result_of<T> >::value), ""); |
| #endif |
| #if TEST_STD_VER > 14 |
| test_invoke_no_result<T>::call(); |
| #endif |
| } |
| |
| int main(int, char**) |
| { |
| typedef NotDerived ND; |
| { // functor object |
| test_result_of<S(int), short> (); |
| test_result_of<S&(unsigned char, int&), double> (); |
| test_result_of<S const&(unsigned char, int&), double const &> (); |
| test_result_of<S volatile&(unsigned char, int&), double volatile&> (); |
| test_result_of<S const volatile&(unsigned char, int&), double const volatile&> (); |
| } |
| { // pointer to function |
| typedef bool (&RF0)(); |
| typedef bool* (&RF1)(int); |
| typedef bool& (&RF2)(int, int); |
| typedef bool const& (&RF3)(int, int, int); |
| typedef bool (&RF4)(int, ...); |
| typedef bool (*PF0)(); |
| typedef bool* (*PF1)(int); |
| typedef bool& (*PF2)(int, int); |
| typedef bool const& (*PF3)(int, int, int); |
| typedef bool (*PF4)(int, ...); |
| typedef bool (*&PRF0)(); |
| typedef bool* (*&PRF1)(int); |
| typedef bool& (*&PRF2)(int, int); |
| typedef bool const& (*&PRF3)(int, int, int); |
| typedef bool (*&PRF4)(int, ...); |
| test_result_of<RF0(), bool>(); |
| test_result_of<RF1(int), bool*>(); |
| test_result_of<RF2(int, long), bool&>(); |
| test_result_of<RF3(int, long, int), bool const&>(); |
| test_result_of<RF4(int, float, void*), bool>(); |
| test_result_of<PF0(), bool>(); |
| test_result_of<PF1(int), bool*>(); |
| test_result_of<PF2(int, long), bool&>(); |
| test_result_of<PF3(int, long, int), bool const&>(); |
| test_result_of<PF4(int, float, void*), bool>(); |
| test_result_of<PRF0(), bool>(); |
| test_result_of<PRF1(int), bool*>(); |
| test_result_of<PRF2(int, long), bool&>(); |
| test_result_of<PRF3(int, long, int), bool const&>(); |
| test_result_of<PRF4(int, float, void*), bool>(); |
| } |
| { // pointer to member function |
| |
| typedef int (S::*PMS0)(); |
| typedef int* (S::*PMS1)(long); |
| typedef int& (S::*PMS2)(long, int); |
| typedef const int& (S::*PMS3)(int, ...); |
| test_result_of<PMS0( S), int> (); |
| test_result_of<PMS0( S&), int> (); |
| test_result_of<PMS0( S*), int> (); |
| test_result_of<PMS0( S*&), int> (); |
| test_result_of<PMS0( std::reference_wrapper<S>), int> (); |
| test_result_of<PMS0(const std::reference_wrapper<S>&), int> (); |
| test_result_of<PMS0( std::reference_wrapper<SD>), int> (); |
| test_result_of<PMS0(const std::reference_wrapper<SD>&), int> (); |
| test_result_of<PMS0(std::unique_ptr<S>), int> (); |
| test_result_of<PMS0(std::unique_ptr<SD>), int> (); |
| test_no_result<PMS0(const S&)>(); |
| test_no_result<PMS0(volatile S&)>(); |
| test_no_result<PMS0(const volatile S&)>(); |
| test_no_result<PMS0(ND & )>(); |
| test_no_result<PMS0(const ND& )>(); |
| test_no_result<PMS0(std::unique_ptr<S const> )>(); |
| test_no_result<PMS0(std::reference_wrapper<S const>)>(); |
| test_no_result<PMS0(std::reference_wrapper<ND> )>(); |
| test_no_result<PMS0(std::unique_ptr<ND> )>(); |
| |
| test_result_of<PMS1( S, int), int*> (); |
| test_result_of<PMS1( S&, int), int*> (); |
| test_result_of<PMS1( S*, int), int*> (); |
| test_result_of<PMS1( S*&, int), int*> (); |
| test_result_of<PMS1(std::unique_ptr<S>, int), int*> (); |
| test_result_of<PMS1(std::unique_ptr<SD>, int), int*> (); |
| test_result_of<PMS1(std::reference_wrapper<S>, int), int*> (); |
| test_result_of<PMS1(const std::reference_wrapper<S>&, int), int*> (); |
| test_result_of<PMS1(std::reference_wrapper<SD>, int), int*> (); |
| test_result_of<PMS1(const std::reference_wrapper<SD>&, int), int*> (); |
| test_no_result<PMS1(const S&, int)>(); |
| test_no_result<PMS1(volatile S&, int)>(); |
| test_no_result<PMS1(const volatile S&, int)>(); |
| test_no_result<PMS1(ND &, int)>(); |
| test_no_result<PMS1(const ND&, int)>(); |
| test_no_result<PMS1(std::unique_ptr<S const>, int)>(); |
| test_no_result<PMS1(std::reference_wrapper<S const>, int)>(); |
| test_no_result<PMS1(std::reference_wrapper<ND>, int)>(); |
| test_no_result<PMS1(std::unique_ptr<ND>, int)>(); |
| |
| test_result_of<PMS2( S, int, int), int&> (); |
| test_result_of<PMS2( S&, int, int), int&> (); |
| test_result_of<PMS2( S*, int, int), int&> (); |
| test_result_of<PMS2( S*&, int, int), int&> (); |
| test_result_of<PMS2(std::unique_ptr<S>, int, int), int&> (); |
| test_result_of<PMS2(std::unique_ptr<SD>, int, int), int&> (); |
| test_result_of<PMS2(std::reference_wrapper<S>, int, int), int&> (); |
| test_result_of<PMS2(const std::reference_wrapper<S>&, int, int), int&> (); |
| test_result_of<PMS2(std::reference_wrapper<SD>, int, int), int&> (); |
| test_result_of<PMS2(const std::reference_wrapper<SD>&, int, int), int&> (); |
| test_no_result<PMS2(const S&, int, int)>(); |
| test_no_result<PMS2(volatile S&, int, int)>(); |
| test_no_result<PMS2(const volatile S&, int, int)>(); |
| test_no_result<PMS2(std::unique_ptr<S const>, int, int)>(); |
| test_no_result<PMS2(std::reference_wrapper<S const>, int, int)>(); |
| test_no_result<PMS2(const ND&, int, int)>(); |
| test_no_result<PMS2(std::reference_wrapper<ND>, int, int)>(); |
| test_no_result<PMS2(std::unique_ptr<ND>, int, int)>(); |
| |
| test_result_of<PMS3(S&, int), const int &>(); |
| test_result_of<PMS3(S&, int, long), const int &>(); |
| |
| typedef int (S::*PMS0C)() const; |
| typedef int* (S::*PMS1C)(long) const; |
| typedef int& (S::*PMS2C)(long, int) const; |
| typedef const int& (S::*PMS3C)(int, ...) const; |
| test_result_of<PMS0C( S), int> (); |
| test_result_of<PMS0C( S&), int> (); |
| test_result_of<PMS0C(const S&), int> (); |
| test_result_of<PMS0C( S*), int> (); |
| test_result_of<PMS0C(const S*), int> (); |
| test_result_of<PMS0C( S*&), int> (); |
| test_result_of<PMS0C(const S*&), int> (); |
| test_result_of<PMS0C(std::unique_ptr<S>), int> (); |
| test_result_of<PMS0C(std::unique_ptr<SD>), int> (); |
| test_result_of<PMS0C(std::reference_wrapper<S> ), int> (); |
| test_result_of<PMS0C(std::reference_wrapper<const S> ), int> (); |
| test_result_of<PMS0C(const std::reference_wrapper<S> & ), int> (); |
| test_result_of<PMS0C(const std::reference_wrapper<const S> &), int> (); |
| test_result_of<PMS0C(std::reference_wrapper<SD> ), int> (); |
| test_result_of<PMS0C(std::reference_wrapper<const SD> ), int> (); |
| test_result_of<PMS0C(const std::reference_wrapper<SD> & ), int> (); |
| test_result_of<PMS0C(const std::reference_wrapper<const SD> &), int> (); |
| test_no_result<PMS0C(volatile S&)>(); |
| test_no_result<PMS0C(const volatile S&)>(); |
| |
| test_result_of<PMS1C( S, int), int*> (); |
| test_result_of<PMS1C( S&, int), int*> (); |
| test_result_of<PMS1C(const S&, int), int*> (); |
| test_result_of<PMS1C( S*, int), int*> (); |
| test_result_of<PMS1C(const S*, int), int*> (); |
| test_result_of<PMS1C( S*&, int), int*> (); |
| test_result_of<PMS1C(const S*&, int), int*> (); |
| test_result_of<PMS1C(std::unique_ptr<S>, int), int*> (); |
| test_no_result<PMS1C(volatile S&, int)>(); |
| test_no_result<PMS1C(const volatile S&, int)>(); |
| |
| test_result_of<PMS2C( S, int, int), int&> (); |
| test_result_of<PMS2C( S&, int, int), int&> (); |
| test_result_of<PMS2C(const S&, int, int), int&> (); |
| test_result_of<PMS2C( S*, int, int), int&> (); |
| test_result_of<PMS2C(const S*, int, int), int&> (); |
| test_result_of<PMS2C( S*&, int, int), int&> (); |
| test_result_of<PMS2C(const S*&, int, int), int&> (); |
| test_result_of<PMS2C(std::unique_ptr<S>, int, int), int&> (); |
| test_no_result<PMS2C(volatile S&, int, int)>(); |
| test_no_result<PMS2C(const volatile S&, int, int)>(); |
| |
| test_result_of<PMS3C(S&, int), const int &>(); |
| test_result_of<PMS3C(S&, int, long), const int &>(); |
| |
| typedef int (S::*PMS0V)() volatile; |
| typedef int* (S::*PMS1V)(long) volatile; |
| typedef int& (S::*PMS2V)(long, int) volatile; |
| typedef const int& (S::*PMS3V)(int, ...) volatile; |
| test_result_of<PMS0V( S), int> (); |
| test_result_of<PMS0V( S&), int> (); |
| test_result_of<PMS0V(volatile S&), int> (); |
| test_result_of<PMS0V( S*), int> (); |
| test_result_of<PMS0V(volatile S*), int> (); |
| test_result_of<PMS0V( S*&), int> (); |
| test_result_of<PMS0V(volatile S*&), int> (); |
| test_result_of<PMS0V(std::unique_ptr<S>), int> (); |
| test_no_result<PMS0V(const S&)>(); |
| test_no_result<PMS0V(const volatile S&)>(); |
| |
| test_result_of<PMS1V( S, int), int*> (); |
| test_result_of<PMS1V( S&, int), int*> (); |
| test_result_of<PMS1V(volatile S&, int), int*> (); |
| test_result_of<PMS1V( S*, int), int*> (); |
| test_result_of<PMS1V(volatile S*, int), int*> (); |
| test_result_of<PMS1V( S*&, int), int*> (); |
| test_result_of<PMS1V(volatile S*&, int), int*> (); |
| test_result_of<PMS1V(std::unique_ptr<S>, int), int*> (); |
| test_no_result<PMS1V(const S&, int)>(); |
| test_no_result<PMS1V(const volatile S&, int)>(); |
| |
| test_result_of<PMS2V( S, int, int), int&> (); |
| test_result_of<PMS2V( S&, int, int), int&> (); |
| test_result_of<PMS2V(volatile S&, int, int), int&> (); |
| test_result_of<PMS2V( S*, int, int), int&> (); |
| test_result_of<PMS2V(volatile S*, int, int), int&> (); |
| test_result_of<PMS2V( S*&, int, int), int&> (); |
| test_result_of<PMS2V(volatile S*&, int, int), int&> (); |
| test_result_of<PMS2V(std::unique_ptr<S>, int, int), int&> (); |
| test_no_result<PMS2V(const S&, int, int)>(); |
| test_no_result<PMS2V(const volatile S&, int, int)>(); |
| |
| test_result_of<PMS3V(S&, int), const int &>(); |
| test_result_of<PMS3V(S&, int, long), const int &>(); |
| |
| typedef int (S::*PMS0CV)() const volatile; |
| typedef int* (S::*PMS1CV)(long) const volatile; |
| typedef int& (S::*PMS2CV)(long, int) const volatile; |
| typedef const int& (S::*PMS3CV)(int, ...) const volatile; |
| test_result_of<PMS0CV( S), int> (); |
| test_result_of<PMS0CV( S&), int> (); |
| test_result_of<PMS0CV(const S&), int> (); |
| test_result_of<PMS0CV(volatile S&), int> (); |
| test_result_of<PMS0CV(const volatile S&), int> (); |
| test_result_of<PMS0CV( S*), int> (); |
| test_result_of<PMS0CV(const S*), int> (); |
| test_result_of<PMS0CV(volatile S*), int> (); |
| test_result_of<PMS0CV(const volatile S*), int> (); |
| test_result_of<PMS0CV( S*&), int> (); |
| test_result_of<PMS0CV(const S*&), int> (); |
| test_result_of<PMS0CV(volatile S*&), int> (); |
| test_result_of<PMS0CV(const volatile S*&), int> (); |
| test_result_of<PMS0CV(std::unique_ptr<S>), int> (); |
| |
| test_result_of<PMS1CV( S, int), int*> (); |
| test_result_of<PMS1CV( S&, int), int*> (); |
| test_result_of<PMS1CV(const S&, int), int*> (); |
| test_result_of<PMS1CV(volatile S&, int), int*> (); |
| test_result_of<PMS1CV(const volatile S&, int), int*> (); |
| test_result_of<PMS1CV( S*, int), int*> (); |
| test_result_of<PMS1CV(const S*, int), int*> (); |
| test_result_of<PMS1CV(volatile S*, int), int*> (); |
| test_result_of<PMS1CV(const volatile S*, int), int*> (); |
| test_result_of<PMS1CV( S*&, int), int*> (); |
| test_result_of<PMS1CV(const S*&, int), int*> (); |
| test_result_of<PMS1CV(volatile S*&, int), int*> (); |
| test_result_of<PMS1CV(const volatile S*&, int), int*> (); |
| test_result_of<PMS1CV(std::unique_ptr<S>, int), int*> (); |
| |
| test_result_of<PMS2CV( S, int, int), int&> (); |
| test_result_of<PMS2CV( S&, int, int), int&> (); |
| test_result_of<PMS2CV(const S&, int, int), int&> (); |
| test_result_of<PMS2CV(volatile S&, int, int), int&> (); |
| test_result_of<PMS2CV(const volatile S&, int, int), int&> (); |
| test_result_of<PMS2CV( S*, int, int), int&> (); |
| test_result_of<PMS2CV(const S*, int, int), int&> (); |
| test_result_of<PMS2CV(volatile S*, int, int), int&> (); |
| test_result_of<PMS2CV(const volatile S*, int, int), int&> (); |
| test_result_of<PMS2CV( S*&, int, int), int&> (); |
| test_result_of<PMS2CV(const S*&, int, int), int&> (); |
| test_result_of<PMS2CV(volatile S*&, int, int), int&> (); |
| test_result_of<PMS2CV(const volatile S*&, int, int), int&> (); |
| test_result_of<PMS2CV(std::unique_ptr<S>, int, int), int&> (); |
| |
| test_result_of<PMS3CV(S&, int), const int &>(); |
| test_result_of<PMS3CV(S&, int, long), const int &>(); |
| } |
| { // pointer to member data |
| typedef char S::*PMD; |
| test_result_of<PMD(S&), char &>(); |
| test_result_of<PMD(S*), char &>(); |
| test_result_of<PMD(S* const), char &>(); |
| test_result_of<PMD(const S&), const char&> (); |
| test_result_of<PMD(const S*), const char&> (); |
| test_result_of<PMD(volatile S&), volatile char&> (); |
| test_result_of<PMD(volatile S*), volatile char&> (); |
| test_result_of<PMD(const volatile S&), const volatile char&> (); |
| test_result_of<PMD(const volatile S*), const volatile char&> (); |
| test_result_of<PMD(SD&), char &>(); |
| test_result_of<PMD(SD const&), const char&>(); |
| test_result_of<PMD(SD*), char&>(); |
| test_result_of<PMD(const SD*), const char&>(); |
| test_result_of<PMD(std::unique_ptr<S>), char &>(); |
| test_result_of<PMD(std::unique_ptr<S const>), const char&>(); |
| #if TEST_STD_VER >= 11 |
| test_result_of<PMD(std::reference_wrapper<S>), char&>(); |
| test_result_of<PMD(std::reference_wrapper<S const>), const char&>(); |
| #endif |
| test_no_result<PMD(ND&)>(); |
| } |
| |
| return 0; |
| } |
