bc8d3f97eb
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@103490 91177308-0d34-0410-b5e6-96231b3b80d8
89 lines
2.4 KiB
C++
89 lines
2.4 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// ÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊThe LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// <istream>
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// basic_istream<charT,traits>& get(basic_streambuf<char_type,traits>& sb);
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#include <istream>
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#include <cassert>
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template <class CharT>
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class testbuf
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: public std::basic_streambuf<CharT>
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{
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typedef std::basic_streambuf<CharT> base;
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std::basic_string<CharT> str_;
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public:
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testbuf()
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{
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}
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testbuf(const std::basic_string<CharT>& str)
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: str_(str)
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{
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base::setg(const_cast<CharT*>(str_.data()),
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const_cast<CharT*>(str_.data()),
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const_cast<CharT*>(str_.data() + str_.size()));
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}
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std::basic_string<CharT> str() const
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{return std::basic_string<CharT>(base::pbase(), base::pptr());}
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protected:
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virtual typename base::int_type
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overflow(typename base::int_type __c = base::traits_type::eof())
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{
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if (__c != base::traits_type::eof())
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{
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int n = str_.size();
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str_.push_back(__c);
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str_.resize(str_.capacity());
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base::setp(const_cast<CharT*>(str_.data()),
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const_cast<CharT*>(str_.data() + str_.size()));
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base::pbump(n+1);
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}
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return __c;
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}
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};
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int main()
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{
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{
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testbuf<char> sb("testing\n...");
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std::istream is(&sb);
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testbuf<char> sb2;
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is.get(sb2);
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assert(sb2.str() == "testing");
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assert(is.good());
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assert(is.gcount() == 7);
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assert(is.get() == '\n');
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is.get(sb2);
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assert(sb2.str() == "testing...");
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assert(is.eof());
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assert(!is.fail());
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assert(is.gcount() == 3);
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}
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{
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testbuf<wchar_t> sb(L"testing\n...");
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std::wistream is(&sb);
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testbuf<wchar_t> sb2;
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is.get(sb2);
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assert(sb2.str() == L"testing");
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assert(is.good());
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assert(is.gcount() == 7);
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assert(is.get() == L'\n');
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is.get(sb2);
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assert(sb2.str() == L"testing...");
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assert(is.eof());
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assert(!is.fail());
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assert(is.gcount() == 3);
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}
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}
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