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//===----------------------------------------------------------------------===//
//
// 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_stringstream
// template<class T>
// basic_stringstream(const T& t, ios_base::openmode which, 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 NStrStream = std::basic_stringstream<nasty_char, nasty_char_traits, test_allocator<nasty_char>>;
static_assert(std::constructible_from<NStrStream, nasty_char*, test_allocator<nasty_char>>);
static_assert(test_convertible<NStrStream, nasty_char*, std::ios_base::openmode, const test_allocator<nasty_char>>());
// const nasty_char*
static_assert(std::constructible_from<NStrStream, const nasty_char*, test_allocator<nasty_char>>);
static_assert(
test_convertible<NStrStream, const nasty_char*, std::ios_base::openmode, const test_allocator<nasty_char>>());
}
template <typename CharT, typename TraitsT = std::char_traits<CharT>, typename AllocT = std::allocator<CharT>>
void test_sfinae() {
using StrStream = std::basic_stringstream<CharT, TraitsT, AllocT>;
// `CharT*`
static_assert(std::constructible_from<StrStream, CharT*, AllocT>);
static_assert(test_convertible<StrStream, CharT*, std::ios_base::openmode, const AllocT>());
// `const CharT*`
static_assert(std::constructible_from<StrStream, const CharT*, AllocT>);
static_assert(test_convertible<StrStream, const CharT*, std::ios_base::openmode, const AllocT>());
// `std::basic_string_view<CharT>`
static_assert(std::constructible_from<StrStream,
const std::basic_string_view<CharT, TraitsT>,
std::ios_base::openmode,
const AllocT>);
static_assert(test_convertible<StrStream,
const std::basic_string_view<CharT, TraitsT>,
std::ios_base::openmode,
const AllocT>());
// `std::basic_string<CharT>`
static_assert(std::constructible_from<StrStream,
const std::basic_string<CharT, TraitsT>,
std::ios_base::openmode,
const AllocT>);
static_assert(
test_convertible<StrStream, const std::basic_string<CharT, TraitsT>, std::ios_base::openmode, const AllocT>());
// ConstConvertibleStringView<CharT>
static_assert(std::constructible_from<StrStream,
const ConstConvertibleStringView<CharT, TraitsT>,
std::ios_base::openmode,
const AllocT>);
static_assert(test_convertible<StrStream,
const ConstConvertibleStringView<CharT, TraitsT>,
std::ios_base::openmode,
const AllocT>());
// NonConstConvertibleStringView<CharT>
static_assert(!std::constructible_from<StrStream,
NonConstConvertibleStringView<CharT, TraitsT>,
std::ios_base::openmode,
const AllocT>);
static_assert(!test_convertible<StrStream,
NonConstConvertibleStringView<CharT, TraitsT>,
std::ios_base::openmode,
const AllocT>());
static_assert(!std::constructible_from<StrStream,
const NonConstConvertibleStringView<CharT, TraitsT>,
std::ios_base::openmode,
const AllocT>);
static_assert(!test_convertible<StrStream,
const NonConstConvertibleStringView<CharT, TraitsT>,
std::ios_base::openmode,
const AllocT>());
// Non-`string-view-like`
static_assert(!std::constructible_from<StrStream, const SomeObject, std::ios_base::openmode, const AllocT>);
static_assert(!test_convertible<StrStream, const SomeObject, std::ios_base::openmode, const AllocT>());
static_assert(!std::constructible_from<StrStream, const int, std::ios_base::openmode, const AllocT>);
static_assert(!test_convertible<StrStream, const int, std::ios_base::openmode, const AllocT>());
// Non-mode
static_assert(
!std::constructible_from<StrStream, const std::basic_string_view<CharT, TraitsT>, NonMode, const NonAllocator>);
static_assert(
!test_convertible<StrStream, const std::basic_string_view<CharT, TraitsT>, NonMode, const NonAllocator>());
// Non-allocator
static_assert(!std::constructible_from<StrStream,
const std::basic_string_view<CharT, TraitsT>,
std::ios_base::openmode,
const NonAllocator>);
static_assert(!test_convertible<StrStream,
const std::basic_string_view<CharT, TraitsT>,
std::ios_base::openmode,
const NonAllocator>());
}
template <typename CharT, typename TraitsT = std::char_traits<CharT>, typename AllocT = std::allocator<CharT>>
void test() {
using StrStream = std::basic_stringstream<CharT, TraitsT, AllocT>;
const AllocT allocator;
// const CharT*
{
StrStream ss(CS("zmt"), std::ios_base::out | std::ios_base::in, allocator);
assert(ss.str() == CS("zmt"));
assert(ss.rdbuf()->get_allocator() == allocator);
}
// std::basic_string_view<CharT>
{
const std::basic_string_view<CharT, TraitsT> csv = SV("zmt");
StrStream ss(csv, std::ios_base::out | std::ios_base::in, allocator);
assert(ss.str() == CS("zmt"));
assert(ss.rdbuf()->get_allocator() == allocator);
}
// std::basic_string<CharT>
{
const std::basic_string<CharT, TraitsT, AllocT> cs = ST("zmt", allocator);
StrStream ss(cs, std::ios_base::out | std::ios_base::in, allocator);
assert(ss.str() == CS("zmt"));
assert(ss.rdbuf()->get_allocator() == allocator);
}
// ConstConvertibleStringView<CharT>
{
const ConstConvertibleStringView<CharT, TraitsT> sv{CS("zmt")};
StrStream ss(sv, std::ios_base::out | std::ios_base::in, allocator);
assert(ss.str() == CS("zmt"));
assert(ss.rdbuf()->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;
}
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