bca4d67c16
Summary: std::tuple marks its constructors as noexcept when the corresponding memberwise constructors are noexcept too -- this commit improves std::pair so that it behaves the same. This is a re-application of r348824, which broke the build in C++03 mode because a test was marked as supported in C++03 when it shouldn't be. Note: I did not add support in the explicit and non-explicit `pair(_Tuple&& __p)` constructors because those are non-standard extensions, and supporting them properly is tedious (we have to copy the rvalue-referenceness of the deduced _Tuple&& onto the result of tuple_element). <rdar://problem/29537079> Reviewers: mclow.lists, EricWF Subscribers: christof, llvm-commits Differential Revision: https://reviews.llvm.org/D48669 git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@348847 91177308-0d34-0410-b5e6-96231b3b80d8
39 lines
1.7 KiB
C++
39 lines
1.7 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
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// <utility>
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// template <class T1, class T2> struct pair
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// template <class... Args1, class... Args2>
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// pair(piecewise_construct_t, tuple<Args1...> first_args,
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// tuple<Args2...> second_args);
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#include <tuple>
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#include <type_traits>
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#include <utility>
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#include "archetypes.hpp"
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int main() {
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using NonThrowingConvert = NonThrowingTypes::ConvertingType;
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using ThrowingConvert = NonTrivialTypes::ConvertingType;
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static_assert(!std::is_nothrow_constructible<std::pair<ThrowingConvert, ThrowingConvert>,
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std::piecewise_construct_t, std::tuple<int, int>, std::tuple<long, long>>::value, "");
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static_assert(!std::is_nothrow_constructible<std::pair<NonThrowingConvert, ThrowingConvert>,
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std::piecewise_construct_t, std::tuple<int, int>, std::tuple<long, long>>::value, "");
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static_assert(!std::is_nothrow_constructible<std::pair<ThrowingConvert, NonThrowingConvert>,
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std::piecewise_construct_t, std::tuple<int, int>, std::tuple<long, long>>::value, "");
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static_assert( std::is_nothrow_constructible<std::pair<NonThrowingConvert, NonThrowingConvert>,
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std::piecewise_construct_t, std::tuple<int, int>, std::tuple<long, long>>::value, "");
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}
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