//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
// <locale>
// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS -D_LIBCPP_ENABLE_CXX26_REMOVED_CODECVT -D_LIBCPP_ENABLE_CXX26_REMOVED_WSTRING_CONVERT
// wbuffer_convert<Codecvt, Elem, Tr>
// int_type pbackfail(int_type c = traits::eof());
// This test is not entirely portable
// XFAIL: no-wide-characters
#include <locale>
#include <cassert>
#include <codecvt>
#include <sstream>
struct test_buf
: public std::wbuffer_convert<std::codecvt_utf8<wchar_t> >
{
typedef std::wbuffer_convert<std::codecvt_utf8<wchar_t> > base;
typedef base::char_type char_type;
typedef base::int_type int_type;
typedef base::traits_type traits_type;
explicit test_buf(std::streambuf* sb) : base(sb) {}
char_type* eback() const {return base::eback();}
char_type* gptr() const {return base::gptr();}
char_type* egptr() const {return base::egptr();}
void gbump(int n) {base::gbump(n);}
virtual int_type pbackfail(int_type c = traits_type::eof()) {return base::pbackfail(c);}
};
int main(int, char**)
{
std::string const s = "123456789";
{
std::istringstream in(s);
test_buf f(in.rdbuf());
assert(f.sbumpc() == L'1');
assert(f.sgetc() == L'2');
assert(f.pbackfail(L'a') == test_buf::traits_type::eof());
}
{
std::istringstream in(s);
test_buf f(in.rdbuf());
assert(f.sbumpc() == L'1');
assert(f.sgetc() == L'2');
assert(f.pbackfail(L'a') == test_buf::traits_type::eof());
assert(f.sbumpc() == L'2');
assert(f.sgetc() == L'3');
}
return 0;
}