| //===----------------------------------------------------------------------===// |
| // |
| // 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 |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // <streambuf> |
| |
| // template <class charT, class traits = char_traits<charT> > |
| // class basic_streambuf; |
| |
| // streamsize sgetn(char_type* s, streamsize n); |
| |
| #include <streambuf> |
| #include <cassert> |
| |
| #include "test_macros.h" |
| |
| int xsgetn_called = 0; |
| |
| struct test |
| : public std::basic_streambuf<char> |
| { |
| test() {} |
| |
| protected: |
| std::streamsize xsgetn(char_type*, std::streamsize) |
| { |
| ++xsgetn_called; |
| return 10; |
| } |
| }; |
| |
| int main(int, char**) |
| { |
| test t; |
| assert(xsgetn_called == 0); |
| assert(t.sgetn(0, 0) == 10); |
| assert(xsgetn_called == 1); |
| |
| return 0; |
| } |