| 1 | /*
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| 2 | * Copyright (c) 2018 Jaroslav Jindrak
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | #ifndef LIBCPP_BITS_RESULT_OF
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| 30 | #define LIBCPP_BITS_RESULT_OF
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| 31 |
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| 32 | /**
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| 33 | * TODO: We have two implementations and I can't remember which
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| 34 | * one is the correnct one, investigate!
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| 35 | */
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| 36 | #include <__bits/invoke.hpp>
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| 37 |
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| 38 | namespace std
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| 39 | {
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| 40 | /**
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| 41 | * Note: This doesn't work, C++14 standard allows for F
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| 42 | * to be any complete type, our implementation
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| 43 | * currently works like the C++11 version where
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| 44 | * F has to be callable.
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| 45 | * TODO: Fix this.
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| 46 | */
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| 47 |
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| 48 | template<class>
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| 49 | struct result_of;
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| 50 |
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| 51 | template<class F, class... Args>
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| 52 | class result_of<F(Args...)>: aux::type_is<
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| 53 | decltype(aux::invoke(declval<F>(), declval<ArgTypes>()...))
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| 54 | >
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| 55 | { /* DUMMY BODY */ };
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| 56 |
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| 57 | template<class T>
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| 58 | using result_of_t = typename result_of<T>::type;
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| 59 | }
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| 60 |
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| 61 | #endif
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