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
23 template <class S>
24 void
test(S s0,const typename S::allocator_type & a)25 test(S s0, const typename S::allocator_type& a)
26 {
27 S s1 = s0;
28 S s2(std::move(s0), a);
29 LIBCPP_ASSERT(s2.__invariants());
30 LIBCPP_ASSERT(s0.__invariants());
31 assert(s2 == s1);
32 assert(s2.capacity() >= s2.size());
33 assert(s2.get_allocator() == a);
34 }
35
36
main(int,char **)37 int main(int, char**)
38 {
39 {
40 typedef test_allocator<char> A;
41 typedef std::basic_string<char, std::char_traits<char>, A> S;
42 #if TEST_STD_VER > 14
43 static_assert((noexcept(S{})), "" );
44 #elif TEST_STD_VER >= 11
45 static_assert((noexcept(S()) == std::is_nothrow_move_constructible<A>::value), "" );
46 #endif
47 test(S(), A(3));
48 test(S("1"), A(5));
49 test(S("1234567890123456789012345678901234567890123456789012345678901234567890"), A(7));
50 }
51
52 int alloc_count = test_alloc_base::alloc_count;
53 {
54 typedef test_allocator<char> A;
55 typedef std::basic_string<char, std::char_traits<char>, A> S;
56 #if TEST_STD_VER > 14
57 static_assert((noexcept(S{})), "" );
58 #elif TEST_STD_VER >= 11
59 static_assert((noexcept(S()) == std::is_nothrow_move_constructible<A>::value), "" );
60 #endif
61 S s1 ( "Twas brillig, and the slivy toves did gyre and gymbal in the wabe" );
62 S s2 (std::move(s1), A(1));
63 }
64 assert ( test_alloc_base::alloc_count == alloc_count );
65 {
66 typedef min_allocator<char> A;
67 typedef std::basic_string<char, std::char_traits<char>, A> S;
68 #if TEST_STD_VER > 14
69 static_assert((noexcept(S{})), "" );
70 #elif TEST_STD_VER >= 11
71 static_assert((noexcept(S()) == std::is_nothrow_move_constructible<A>::value), "" );
72 #endif
73 test(S(), A());
74 test(S("1"), A());
75 test(S("1234567890123456789012345678901234567890123456789012345678901234567890"), A());
76 }
77
78 return 0;
79 }
80