| 1 | //===----------------------------------------------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | // <functional> |
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| 10 | |
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| 11 | // template <CopyConstructible Arg, Returnable Result> |
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| 12 | // pointer_to_unary_function<Arg, Result> |
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| 13 | // ptr_fun(Result (*f)(Arg)); |
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| 14 | |
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| 15 | // REQUIRES: c++03 || c++11 || c++14 |
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| 16 | // ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS |
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| 17 | |
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| 18 | #include <functional> |
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| 19 | #include <type_traits> |
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| 20 | #include <cassert> |
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| 21 | |
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| 22 | #include "test_macros.h" |
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| 23 | |
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| 24 | double unary_f(int i) {return 0.5 - i;} |
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| 25 | |
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| 26 | int main(int, char**) |
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| 27 | { |
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| 28 | assert(std::ptr_fun(unary_f)(36) == -35.5); |
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| 29 | |
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| 30 | return 0; |
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| 31 | } |
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| 32 | |
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