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63 lines
1.8 KiB
C++
63 lines
1.8 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// <locale>
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// wbuffer_convert<Codecvt, Elem, Tr>
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// int_type pbackfail(int_type c = traits::eof());
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// This test is not entirely portable
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#include <locale>
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#include <codecvt>
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#include <fstream>
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#include <cassert>
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#include "test_macros.h"
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struct test_buf
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: public std::wbuffer_convert<std::codecvt_utf8<wchar_t> >
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{
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typedef std::wbuffer_convert<std::codecvt_utf8<wchar_t> > base;
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typedef base::char_type char_type;
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typedef base::int_type int_type;
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typedef base::traits_type traits_type;
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explicit test_buf(std::streambuf* sb) : base(sb) {}
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char_type* eback() const {return base::eback();}
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char_type* gptr() const {return base::gptr();}
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char_type* egptr() const {return base::egptr();}
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void gbump(int n) {base::gbump(n);}
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virtual int_type pbackfail(int_type c = traits_type::eof()) {return base::pbackfail(c);}
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};
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int main(int, char**)
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{
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{
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std::ifstream bs("underflow.dat");
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test_buf f(bs.rdbuf());
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assert(f.sbumpc() == L'1');
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assert(f.sgetc() == L'2');
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assert(f.pbackfail(L'a') == test_buf::traits_type::eof());
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}
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{
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std::fstream bs("underflow.dat");
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test_buf f(bs.rdbuf());
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assert(f.sbumpc() == L'1');
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assert(f.sgetc() == L'2');
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assert(f.pbackfail(L'a') == test_buf::traits_type::eof());
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assert(f.sbumpc() == L'2');
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assert(f.sgetc() == L'3');
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}
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return 0;
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}
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