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-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 // UNSUPPORTED: c++03 10 11 // <string> 12 13 // basic_string(basic_string&& str, const Allocator& alloc); 14 15 #include <string> 16 #include <cassert> 17 18 #include "test_macros.h" 19 #include "test_allocator.h" 20 #include "min_allocator.h" 21 22 template <class S> 23 TEST_CONSTEXPR_CXX20 void 24 test(S s0, const typename S::allocator_type& a) 25 { 26 S s1 = s0; 27 S s2(std::move(s0), a); 28 LIBCPP_ASSERT(s2.__invariants()); 29 LIBCPP_ASSERT(s0.__invariants()); 30 assert(s2 == s1); 31 assert(s2.capacity() >= s2.size()); 32 assert(s2.get_allocator() == a); 33 } 34 35 bool test() { 36 test_allocator_statistics alloc_stats; 37 { 38 typedef test_allocator<char> A; 39 typedef std::basic_string<char, std::char_traits<char>, A> S; 40 #if TEST_STD_VER > 14 41 static_assert((noexcept(S{})), "" ); 42 #elif TEST_STD_VER >= 11 43 static_assert((noexcept(S()) == std::is_nothrow_move_constructible<A>::value), "" ); 44 #endif 45 test(S(), A(3, &alloc_stats)); 46 test(S("1"), A(5, &alloc_stats)); 47 test(S("1234567890123456789012345678901234567890123456789012345678901234567890"), A(7, &alloc_stats)); 48 } 49 50 int alloc_count = alloc_stats.alloc_count; 51 { 52 typedef test_allocator<char> A; 53 typedef std::basic_string<char, std::char_traits<char>, A> S; 54 #if TEST_STD_VER > 14 55 static_assert((noexcept(S{})), "" ); 56 #elif TEST_STD_VER >= 11 57 static_assert((noexcept(S()) == std::is_nothrow_move_constructible<A>::value), "" ); 58 #endif 59 S s1 ( "Twas brillig, and the slivy toves did gyre and gymbal in the wabe", A(&alloc_stats)); 60 S s2 (std::move(s1), A(1, &alloc_stats)); 61 } 62 assert ( alloc_stats.alloc_count == alloc_count ); 63 { 64 typedef min_allocator<char> A; 65 typedef std::basic_string<char, std::char_traits<char>, A> S; 66 #if TEST_STD_VER > 14 67 static_assert((noexcept(S{})), "" ); 68 #elif TEST_STD_VER >= 11 69 static_assert((noexcept(S()) == std::is_nothrow_move_constructible<A>::value), "" ); 70 #endif 71 test(S(), A()); 72 test(S("1"), A()); 73 test(S("1234567890123456789012345678901234567890123456789012345678901234567890"), A()); 74 } 75 76 return true; 77 } 78 79 int main(int, char**) 80 { 81 test(); 82 #if TEST_STD_VER > 17 83 // static_assert(test()); 84 #endif 85 86 return 0; 87 } 88