98d3d5b5da
Reviewed By: #libc, ldionne Spies: mgorny, var-const, ormris, philnik, miscco, hiraditya, steven_wu, jkorous, ldionne, christof, libcxx-commits Differential Revision: https://reviews.llvm.org/D68365
102 lines
2.6 KiB
C++
102 lines
2.6 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: c++03, c++11
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// <vector>
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// vector.bool
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// template <class... Args> reference emplace_back(Args&&... args);
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// return type is 'reference' in C++17; 'void' before
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#include <vector>
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#include <cassert>
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#include "test_macros.h"
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#include "min_allocator.h"
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TEST_CONSTEXPR_CXX20 bool tests()
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{
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{
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typedef std::vector<bool> C;
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C c;
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#if TEST_STD_VER > 14
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typedef C::reference Ref;
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Ref r1 = c.emplace_back();
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assert(c.size() == 1);
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assert(c.front() == false);
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r1 = true;
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assert(c.front() == true);
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r1 = false;
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Ref r2 = c.emplace_back(true);
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assert(c.size() == 2);
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assert(c.front() == false);
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assert(c.back() == true);
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r2 = false;
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assert(c.back() == false);
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r2 = true;
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#else
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c.emplace_back();
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assert(c.size() == 1);
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assert(c.front() == false);
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c.emplace_back(true);
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assert(c.size() == 2);
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assert(c.front() == false);
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assert(c.back() == true);
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#endif
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c.emplace_back(true);
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assert(c.size() == 3);
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assert(c.front() == false);
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assert(c[1] == true);
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assert(c.back() == true);
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}
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{
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typedef std::vector<bool, min_allocator<bool>> C;
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C c;
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#if TEST_STD_VER > 14
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typedef C::reference Ref;
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Ref r1 = c.emplace_back();
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assert(c.size() == 1);
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assert(c.front() == false);
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r1 = true;
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assert(c.front() == true);
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r1 = false;
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Ref r2 = c.emplace_back(true);
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assert(c.size() == 2);
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assert(c.front() == false);
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assert(c.back() == true);
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r2 = false;
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assert(c.back() == false);
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r2 = true;
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#else
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c.emplace_back();
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assert(c.size() == 1);
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assert(c.front() == false);
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c.emplace_back(true);
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assert(c.size() == 2);
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assert(c.front() == false);
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assert(c.back() == true);
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#endif
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c.emplace_back(true);
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assert(c.size() == 3);
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assert(c.front() == false);
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assert(c[1] == true);
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assert(c.back() == true);
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}
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return true;
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}
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int main(int, char**)
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{
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tests();
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#if TEST_STD_VER > 17
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static_assert(tests());
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#endif
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return 0;
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}
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