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60 lines
1.2 KiB
C++
60 lines
1.2 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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// <streambuf>
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// template <class charT, class traits = char_traits<charT> >
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// class basic_streambuf;
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// int_type sbumpc();
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#include <streambuf>
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#include <cassert>
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#include "test_macros.h"
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int uflow_called = 0;
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struct test
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: public std::basic_streambuf<char>
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{
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typedef std::basic_streambuf<char> base;
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test() {}
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void setg(char* gbeg, char* gnext, char* gend)
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{
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base::setg(gbeg, gnext, gend);
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}
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protected:
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int_type uflow()
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{
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++uflow_called;
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return 'a';
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}
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};
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int main(int, char**)
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{
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{
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test t;
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assert(uflow_called == 0);
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assert(t.sbumpc() == 'a');
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assert(uflow_called == 1);
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char in[] = "ABC";
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t.setg(in, in, in+sizeof(in));
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assert(t.sbumpc() == 'A');
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assert(uflow_called == 1);
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assert(t.sbumpc() == 'B');
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assert(uflow_called == 1);
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}
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return 0;
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}
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