56 lines · cpp
1//===----------------------------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9// <streambuf>10 11// template <class charT, class traits = char_traits<charT> >12// class basic_streambuf;13 14// streamsize in_avail();15 16#include <streambuf>17#include <cassert>18 19#include "test_macros.h"20 21int showmanyc_called = 0;22 23template <class CharT>24struct test25 : public std::basic_streambuf<CharT>26{27 typedef std::basic_streambuf<CharT> base;28 29 test() {}30 31 void setg(CharT* gbeg, CharT* gnext, CharT* gend)32 {33 base::setg(gbeg, gnext, gend);34 }35protected:36 std::streamsize showmanyc()37 {38 ++showmanyc_called;39 return 5;40 }41};42 43int main(int, char**)44{45 {46 test<char> t;47 assert(t.in_avail() == 5);48 assert(showmanyc_called == 1);49 char in[5];50 t.setg(in, in+2, in+5);51 assert(t.in_avail() == 3);52 }53 54 return 0;55}56