69 lines · cpp
1//===----------------------------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9// <tuple>10 11// template <class... Types> class tuple;12 13// template <class Alloc, class U1, class U2>14// tuple(allocator_arg_t, const Alloc& a, const pair<U1, U2>&);15 16// UNSUPPORTED: c++0317 18#include <tuple>19#include <utility>20#include <cassert>21 22#include "test_macros.h"23#include "allocators.h"24#include "../alloc_first.h"25#include "../alloc_last.h"26 27int main(int, char**)28{29 {30 typedef std::pair<long, int> T0;31 typedef std::tuple<long long, double> T1;32 T0 t0(2, 3);33 T1 t1(std::allocator_arg, A1<int>(5), t0);34 assert(std::get<0>(t1) == 2);35 assert(std::get<1>(t1) == 3);36 }37 {38 typedef std::pair<int, int> T0;39 typedef std::tuple<alloc_first, double> T1;40 T0 t0(2, 3);41 alloc_first::allocator_constructed = false;42 T1 t1(std::allocator_arg, A1<int>(5), t0);43 assert(alloc_first::allocator_constructed);44 assert(std::get<0>(t1) == 2);45 assert(std::get<1>(t1) == 3);46 }47 {48 typedef std::pair<int, int> T0;49 typedef std::tuple<alloc_first, alloc_last> T1;50 T0 t0(2, 3);51 alloc_first::allocator_constructed = false;52 alloc_last::allocator_constructed = false;53 T1 t1(std::allocator_arg, A1<int>(5), t0);54 assert(alloc_first::allocator_constructed);55 assert(alloc_last::allocator_constructed);56 assert(std::get<0>(t1) == 2);57 assert(std::get<1>(t1) == 3);58 }59 {60 // Test that we can use a tag derived from allocator_arg_t61 struct DerivedFromAllocatorArgT : std::allocator_arg_t { };62 DerivedFromAllocatorArgT derived;63 std::pair<int, int> p(1, 2);64 std::tuple<int, int> t(derived, A1<int>(), p);65 }66 67 return 0;68}69