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 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 int main(int, char**) 36 { 37 test_allocator_statistics alloc_stats; 38 { 39 typedef test_allocator<char> A; 40 typedef std::basic_string<char, std::char_traits<char>, A> S; 41 #if TEST_STD_VER > 14 42 static_assert((noexcept(S{})), "" ); 43 #elif TEST_STD_VER >= 11 44 static_assert((noexcept(S()) == std::is_nothrow_move_constructible<A>::value), "" ); 45 #endif 46 test(S(), A(3, &alloc_stats)); 47 test(S("1"), A(5, &alloc_stats)); 48 test(S("1234567890123456789012345678901234567890123456789012345678901234567890"), A(7, &alloc_stats)); 49 } 50 51 int alloc_count = alloc_stats.alloc_count; 52 { 53 typedef test_allocator<char> A; 54 typedef std::basic_string<char, std::char_traits<char>, A> S; 55 #if TEST_STD_VER > 14 56 static_assert((noexcept(S{})), "" ); 57 #elif TEST_STD_VER >= 11 58 static_assert((noexcept(S()) == std::is_nothrow_move_constructible<A>::value), "" ); 59 #endif 60 S s1 ( "Twas brillig, and the slivy toves did gyre and gymbal in the wabe", A(&alloc_stats)); 61 S s2 (std::move(s1), A(1, &alloc_stats)); 62 } 63 assert ( alloc_stats.alloc_count == alloc_count ); 64 { 65 typedef min_allocator<char> A; 66 typedef std::basic_string<char, std::char_traits<char>, A> S; 67 #if TEST_STD_VER > 14 68 static_assert((noexcept(S{})), "" ); 69 #elif TEST_STD_VER >= 11 70 static_assert((noexcept(S()) == std::is_nothrow_move_constructible<A>::value), "" ); 71 #endif 72 test(S(), A()); 73 test(S("1"), A()); 74 test(S("1234567890123456789012345678901234567890123456789012345678901234567890"), A()); 75 } 76 77 return 0; 78 } 79