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42 lines
897 B
C++
42 lines
897 B
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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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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// streamsize sgetn(char_type* s, streamsize n);
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#include <streambuf>
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#include <cassert>
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int xsgetn_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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test() {}
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protected:
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std::streamsize xsgetn(char_type*, std::streamsize)
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{
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++xsgetn_called;
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return 10;
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}
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};
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int main()
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{
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test t;
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assert(xsgetn_called == 0);
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assert(t.sgetn(0, 0) == 10);
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assert(xsgetn_called == 1);
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}
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