adde8aeb1c
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. 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@348824 91177308-0d34-0410-b5e6-96231b3b80d8
37 lines
1.0 KiB
C++
37 lines
1.0 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 <cassert>
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#include <tuple>
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#include <utility>
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int main()
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{
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{
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typedef std::pair<int, int*> P1;
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typedef std::pair<int*, int> P2;
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typedef std::pair<P1, P2> P3;
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P3 p3(std::piecewise_construct, std::tuple<int, int*>(3, nullptr),
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std::tuple<int*, int>(nullptr, 4));
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assert(p3.first == P1(3, nullptr));
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assert(p3.second == P2(nullptr, 4));
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}
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}
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