libcxx initial import

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@103490 91177308-0d34-0410-b5e6-96231b3b80d8
2010-05-11 19:42:16 +00:00
commit bc8d3f97eb
3893 changed files with 1209942 additions and 0 deletions
--- a/test/input.output/iostream.format/input.streams/istream.unformatted/putback.pass.cpp
+++ b/test/input.output/iostream.format/input.streams/istream.unformatted/putback.pass.cpp
@@ -0,0 +1,89 @@
+//===----------------------------------------------------------------------===//
+//
+// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// <istream>
+
+// basic_istream<charT,traits>& putback(char_type c);
+
+#include <istream>
+#include <cassert>
+
+template <class CharT>
+struct testbuf
+    : public std::basic_streambuf<CharT>
+{
+    typedef std::basic_string<CharT> string_type;
+    typedef std::basic_streambuf<CharT> base;
+private:
+    string_type str_;
+public:
+
+    testbuf() {}
+    testbuf(const string_type& str)
+        : str_(str)
+    {
+        base::setg(const_cast<CharT*>(str_.data()),
+                   const_cast<CharT*>(str_.data()),
+                   const_cast<CharT*>(str_.data()) + str_.size());
+    }
+
+    CharT* eback() const {return base::eback();}
+    CharT* gptr() const {return base::gptr();}
+    CharT* egptr() const {return base::egptr();}
+};
+
+int main()
+{
+    {
+        testbuf<char> sb(" 123456789");
+        std::istream is(&sb);
+        is.get();
+        is.get();
+        is.get();
+        is.putback('a');
+        assert(is.bad());
+        assert(is.gcount() == 0);
+        is.clear();
+        is.putback('2');
+        assert(is.good());
+        assert(is.gcount() == 0);
+        is.putback('1');
+        assert(is.good());
+        assert(is.gcount() == 0);
+        is.putback(' ');
+        assert(is.good());
+        assert(is.gcount() == 0);
+        is.putback(' ');
+        assert(is.bad());
+        assert(is.gcount() == 0);
+    }
+    {
+        testbuf<wchar_t> sb(L" 123456789");
+        std::wistream is(&sb);
+        is.get();
+        is.get();
+        is.get();
+        is.putback(L'a');
+        assert(is.bad());
+        assert(is.gcount() == 0);
+        is.clear();
+        is.putback(L'2');
+        assert(is.good());
+        assert(is.gcount() == 0);
+        is.putback(L'1');
+        assert(is.good());
+        assert(is.gcount() == 0);
+        is.putback(L' ');
+        assert(is.good());
+        assert(is.gcount() == 0);
+        is.putback(L' ');
+        assert(is.bad());
+        assert(is.gcount() == 0);
+    }
+}