933afa9761
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@185597 91177308-0d34-0410-b5e6-96231b3b80d8
81 lines
2.5 KiB
C++
81 lines
2.5 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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// <functional>
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// result_of<Fn(ArgTypes...)>
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#include <type_traits>
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#include <memory>
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typedef bool (&PF1)();
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typedef short (*PF2)(long);
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struct S
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{
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operator PF2() const;
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double operator()(char, int&);
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void calc(long) const;
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char data_;
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};
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typedef void (S::*PMS)(long) const;
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typedef char S::*PMD;
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struct wat
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{
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wat& operator*() { return *this; }
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void foo();
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};
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template <class T, class U>
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void test_result_of_imp()
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{
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static_assert((std::is_same<typename std::result_of<T>::type, U>::value), "");
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#if _LIBCPP_STD_VER > 11
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static_assert((std::is_same<std::result_of_t<T>, U>::value), "");
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#endif
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}
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int main()
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{
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test_result_of_imp<S(int), short> ();
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test_result_of_imp<S&(unsigned char, int&), double> ();
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test_result_of_imp<PF1(), bool> ();
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test_result_of_imp<PMS(std::unique_ptr<S>, int), void> ();
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test_result_of_imp<PMS(S, int), void> ();
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test_result_of_imp<PMS(const S&, int), void> ();
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#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
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test_result_of_imp<PMD(S), char&&> ();
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#endif
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test_result_of_imp<PMD(const S*), const char&> ();
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#ifndef _LIBCPP_HAS_NO_TEMPLATE_ALIASES
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using type1 = std::result_of<decltype(&wat::foo)(wat)>::type;
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#endif
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#if _LIBCPP_STD_VER > 11
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using type2 = std::result_of_t<decltype(&wat::foo)(wat)>;
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#endif
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static_assert((std::is_same<std::result_of<S(int)>::type, short>::value), "Error!");
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static_assert((std::is_same<std::result_of<S&(unsigned char, int&)>::type, double>::value), "Error!");
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static_assert((std::is_same<std::result_of<PF1()>::type, bool>::value), "Error!");
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static_assert((std::is_same<std::result_of<PMS(std::unique_ptr<S>, int)>::type, void>::value), "Error!");
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static_assert((std::is_same<std::result_of<PMS(S, int)>::type, void>::value), "Error!");
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static_assert((std::is_same<std::result_of<PMS(const S&, int)>::type, void>::value), "Error!");
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#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
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static_assert((std::is_same<std::result_of<PMD(S)>::type, char&&>::value), "Error!");
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#endif
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static_assert((std::is_same<std::result_of<PMD(const S*)>::type, const char&>::value), "Error!");
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#ifndef _LIBCPP_HAS_NO_TEMPLATE_ALIASES
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using type = std::result_of<decltype(&wat::foo)(wat)>::type;
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#endif
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}
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