1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
|
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20, c++23
// <sstream>
// template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT>>
// class basic_stringbuf
// template<class T>
// basic_stringbuf(const T& t, const Allocator& a);
#include <cassert>
#include <concepts>
#include <memory>
#include <sstream>
#include <string>
#include <string_view>
#include "constexpr_char_traits.h"
#include "nasty_string.h"
#include "test_allocator.h"
#include "test_convertible.h"
#include "test_macros.h"
#include "../../helper_string_macros.h"
#include "../../helper_types.h"
template <typename AllocT = std::allocator<nasty_char>>
void test_sfinae_with_nasty_char() {
// nasty_char*
using NStrBuf = std::basic_istringstream<nasty_char, nasty_char_traits, AllocT>;
static_assert(std::constructible_from<NStrBuf, nasty_char*, AllocT>);
static_assert(test_convertible<NStrBuf, nasty_char*, const AllocT>());
// const nasty_char*
static_assert(std::constructible_from<NStrBuf, const nasty_char*, AllocT>);
static_assert(test_convertible<NStrBuf, const nasty_char*, const AllocT>());
}
template <typename CharT, typename TraitsT = std::char_traits<CharT>, typename AllocT = std::allocator<CharT>>
void test_sfinae() {
using StrBuf = std::basic_stringbuf<CharT, TraitsT, AllocT>;
// `CharT*`
static_assert(std::constructible_from<StrBuf, CharT*, const AllocT>);
static_assert(test_convertible<StrBuf, CharT*, const AllocT>());
// `const CharT*`
static_assert(std::constructible_from<StrBuf, const CharT*, const AllocT>);
static_assert(test_convertible<StrBuf, const CharT*, const AllocT>());
// `std::basic_string_view<CharT>`
static_assert(std::constructible_from<StrBuf, const std::basic_string_view<CharT, TraitsT>, const AllocT>);
static_assert(test_convertible<StrBuf, std::basic_string_view<CharT, TraitsT>, const AllocT>());
// `std::basic_string<CharT>`
static_assert(std::constructible_from<StrBuf, const std::basic_string<CharT, TraitsT>, const AllocT>);
static_assert(test_convertible<StrBuf, const std::basic_string<CharT, TraitsT>, const AllocT>());
// ConstConvertibleStringView<CharT>
static_assert(std::constructible_from<StrBuf, const ConstConvertibleStringView<CharT, TraitsT>, const AllocT>);
static_assert(test_convertible<StrBuf, const ConstConvertibleStringView<CharT, TraitsT>, const AllocT>());
// NonConstConvertibleStringView<CharT>
static_assert(!std::constructible_from<StrBuf, NonConstConvertibleStringView<CharT, TraitsT>, const AllocT>);
static_assert(!test_convertible<StrBuf, NonConstConvertibleStringView<CharT, TraitsT>, const AllocT>());
static_assert(!std::constructible_from<StrBuf, const NonConstConvertibleStringView<CharT, TraitsT>, const AllocT>);
static_assert(!test_convertible<StrBuf, const NonConstConvertibleStringView<CharT, TraitsT>, const AllocT>());
// Non-`string-view-like`
static_assert(!std::constructible_from<StrBuf, const SomeObject, const AllocT>);
static_assert(!test_convertible<StrBuf, const SomeObject, const AllocT>());
// Non-allocator
static_assert(!std::constructible_from<StrBuf, const std::basic_string_view<CharT, TraitsT>, const NonAllocator>);
static_assert(!test_convertible<StrBuf, const std::basic_string_view<CharT, TraitsT>, const NonAllocator>());
}
template <typename CharT, typename TraitsT = std::char_traits<CharT>, typename AllocT = std::allocator<CharT>>
void test() {
using StrBuf = std::basic_stringbuf<CharT, TraitsT, AllocT>;
const AllocT allocator;
// const CharT*
{
StrBuf ss(CS("zmt"), allocator);
assert(ss.str() == CS("zmt"));
assert(ss.get_allocator() == allocator);
}
// std::basic_string_view<CharT>
{
const std::basic_string_view<CharT, TraitsT> csv = SV("zmt");
StrBuf ss(csv, allocator);
assert(ss.str() == CS("zmt"));
assert(ss.get_allocator() == allocator);
}
// std::basic_string<CharT>
{
const std::basic_string<CharT, TraitsT, AllocT> cs = ST("zmt", allocator);
StrBuf ss(cs, allocator);
assert(ss.str() == CS("zmt"));
assert(ss.get_allocator() == allocator);
}
// ConstConvertibleStringView<CharT>
{
const ConstConvertibleStringView<CharT, TraitsT> sv{CS("zmt")};
StrBuf ss(sv, allocator);
assert(ss.str() == CS("zmt"));
assert(ss.get_allocator() == allocator);
}
}
int main(int, char**) {
test_sfinae_with_nasty_char();
test_sfinae_with_nasty_char<test_allocator<nasty_char>>();
test_sfinae<char>();
test_sfinae<char, constexpr_char_traits<char>, std::allocator<char>>();
test_sfinae<char, std::char_traits<char>, test_allocator<char>>();
test_sfinae<char, constexpr_char_traits<char>, test_allocator<char>>();
test<char>();
test<char, constexpr_char_traits<char>, std::allocator<char>>();
test<char, std::char_traits<char>, test_allocator<char>>();
test<char, constexpr_char_traits<char>, test_allocator<char>>();
#ifndef TEST_HAS_NO_WIDE_CHARACTERS
test_sfinae<wchar_t>();
test_sfinae<wchar_t, constexpr_char_traits<wchar_t>, std::allocator<wchar_t>>();
test_sfinae<wchar_t, std::char_traits<wchar_t>, test_allocator<wchar_t>>();
test_sfinae<wchar_t, constexpr_char_traits<wchar_t>, test_allocator<wchar_t>>();
test<wchar_t>();
test<wchar_t, constexpr_char_traits<wchar_t>, std::allocator<wchar_t>>();
test<wchar_t, std::char_traits<wchar_t>, test_allocator<wchar_t>>();
test<wchar_t, constexpr_char_traits<wchar_t>, test_allocator<wchar_t>>();
#endif
return 0;
}
|
