libcxx/test/std/input.output/stream.buffers/streambuf/streambuf.members/streambuf.buffer/pubseekoff.pass.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-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 // <streambuf>
  10
  11 // template <class charT, class traits = char_traits<charT> >
  12 // class basic_streambuf;
  13
  14 // pos_type pubseekoff(off_type off, ios_base::seekdir way,
  15 //                     ios_base::openmode which = ios_base::in | ios_base::out);
  16
  17 #include <streambuf>
  18 #include <cassert>
  19
  20 #include "test_macros.h"
  21
  22 template <class CharT>
  23 struct test
  24     : public std::basic_streambuf<CharT>
  25 {
  26     test() {}
  27 };
  28
  29 int main(int, char**)
  30 {
  31     {
  32         test<char> t;
  33         assert(t.pubseekoff(0, std::ios_base::beg) == -1);
  34         assert(t.pubseekoff(0, std::ios_base::beg, std::ios_base::app) == -1);
  35     }
  36
  37   return 0;
  38 }