141 lines
3.7 KiB
C++
141 lines
3.7 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 U, class V> pair& operator=(tuple<U, V>&& p);
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#include <utility>
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#include <tuple>
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#include <array>
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#include <memory>
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#include <cassert>
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// Clang warns about missing braces when initializing std::array.
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#if defined(__clang__)
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#pragma clang diagnostic ignored "-Wmissing-braces"
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#endif
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struct CountingType {
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static int constructed;
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static int copy_constructed;
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static int move_constructed;
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static int assigned;
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static int copy_assigned;
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static int move_assigned;
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static void reset() {
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constructed = copy_constructed = move_constructed = 0;
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assigned = copy_assigned = move_assigned = 0;
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}
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CountingType() : value(0) { ++constructed; }
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CountingType(int v) : value(v) { ++constructed; }
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CountingType(CountingType const& o) : value(o.value) { ++constructed; ++copy_constructed; }
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CountingType(CountingType&& o) : value(o.value) { ++constructed; ++move_constructed; o.value = -1;}
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CountingType& operator=(CountingType const& o) {
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++assigned;
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++copy_assigned;
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value = o.value;
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return *this;
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}
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CountingType& operator=(CountingType&& o) {
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++assigned;
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++move_assigned;
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value = o.value;
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o.value = -1;
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return *this;
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}
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int value;
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};
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int CountingType::constructed;
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int CountingType::copy_constructed;
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int CountingType::move_constructed;
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int CountingType::assigned;
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int CountingType::copy_assigned;
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int CountingType::move_assigned;
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int main()
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{
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using C = CountingType;
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{
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using P = std::pair<int, C>;
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using T = std::tuple<int, C>;
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T t(42, C{42});
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P p(101, C{101});
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C::reset();
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p = t;
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assert(C::constructed == 0);
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assert(C::assigned == 1);
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assert(C::copy_assigned == 1);
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assert(C::move_assigned == 0);
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assert(p.first == 42);
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assert(p.second.value == 42);
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}
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{
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using P = std::pair<int, C>;
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using T = std::tuple<int, C>;
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T t(42, -42);
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P p(101, 101);
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C::reset();
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p = std::move(t);
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assert(C::constructed == 0);
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assert(C::assigned == 1);
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assert(C::copy_assigned == 0);
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assert(C::move_assigned == 1);
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assert(p.first == 42);
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assert(p.second.value == -42);
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}
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{
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using P = std::pair<C, C>;
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using T = std::array<C, 2>;
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T t = {42, -42};
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P p{101, 101};
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C::reset();
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p = t;
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assert(C::constructed == 0);
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assert(C::assigned == 2);
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assert(C::copy_assigned == 2);
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assert(C::move_assigned == 0);
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assert(p.first.value == 42);
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assert(p.second.value == -42);
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}
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{
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using P = std::pair<C, C>;
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using T = std::array<C, 2>;
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T t = {42, -42};
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P p{101, 101};
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C::reset();
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p = t;
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assert(C::constructed == 0);
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assert(C::assigned == 2);
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assert(C::copy_assigned == 2);
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assert(C::move_assigned == 0);
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assert(p.first.value == 42);
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assert(p.second.value == -42);
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}
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{
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using P = std::pair<C, C>;
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using T = std::array<C, 2>;
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T t = {42, -42};
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P p{101, 101};
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C::reset();
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p = std::move(t);
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assert(C::constructed == 0);
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assert(C::assigned == 2);
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assert(C::copy_assigned == 0);
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assert(C::move_assigned == 2);
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assert(p.first.value == 42);
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assert(p.second.value == -42);
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}
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}
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