| //===----------------------------------------------------------------------===// |
| // |
| // 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> |
| |
| // wbuffer_convert<Codecvt, Elem, Tr> |
| |
| // int_type pbackfail(int_type c = traits::eof()); |
| |
| // This test is not entirely portable |
| |
| #include <locale> |
| #include <codecvt> |
| #include <fstream> |
| #include <cassert> |
| |
| #include "test_macros.h" |
| |
| 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::ifstream bs("underflow.dat"); |
| test_buf f(bs.rdbuf()); |
| assert(f.sbumpc() == L'1'); |
| assert(f.sgetc() == L'2'); |
| assert(f.pbackfail(L'a') == test_buf::traits_type::eof()); |
| } |
| { |
| std::fstream bs("underflow.dat"); |
| test_buf f(bs.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; |
| } |