libcxx initial import
llvm-svn: 103490
diff --git a/libcxx/test/input.output/file.streams/fstreams/filebuf.virtuals/pbackfail.pass.cpp b/libcxx/test/input.output/file.streams/fstreams/filebuf.virtuals/pbackfail.pass.cpp
new file mode 100644
index 0000000..4b0a165
--- /dev/null
+++ b/libcxx/test/input.output/file.streams/fstreams/filebuf.virtuals/pbackfail.pass.cpp
@@ -0,0 +1,56 @@
+//===----------------------------------------------------------------------===//
+//
+// ÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊThe LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// <fstream>
+
+// int_type pbackfail(int_type c = traits::eof());
+
+// This test is not entirely portable
+
+#include <fstream>
+#include <cassert>
+
+template <class CharT>
+struct test_buf
+ : public std::basic_filebuf<CharT>
+{
+ typedef std::basic_filebuf<CharT> base;
+ typedef typename base::char_type char_type;
+ typedef typename base::int_type int_type;
+ typedef typename base::traits_type traits_type;
+
+ char_type* eback() const {return base::eback();}
+ char_type* gptr() const {return base::gptr();}
+ char_type* egptr() const {return base::egptr();}
+ void gbump(int n) {base::gbump(n);}
+
+ virtual int_type pbackfail(int_type c = traits_type::eof()) {return base::pbackfail(c);}
+};
+
+int main()
+{
+ {
+ test_buf<char> f;
+ assert(f.open("underflow.dat", std::ios_base::in) != 0);
+ assert(f.is_open());
+ assert(f.sbumpc() == '1');
+ assert(f.sgetc() == '2');
+ assert(f.pbackfail('a') == -1);
+ }
+ {
+ test_buf<char> f;
+ assert(f.open("underflow.dat", std::ios_base::in | std::ios_base::out) != 0);
+ assert(f.is_open());
+ assert(f.sbumpc() == '1');
+ assert(f.sgetc() == '2');
+ assert(f.pbackfail('a') == 'a');
+ assert(f.sbumpc() == 'a');
+ assert(f.sgetc() == '2');
+ }
+}