[PATCH] D26814: [libcxx] [test] Change ifstream constructor tests to handle read-only files.

[Stephan T. Lavavej via cfe-commits]

STL_MSFT added a comment.

As yet another alternative, I could keep the ios_base::openmode tests in ifstream.cons, but use ios_base::binary instead of ios_base::out.


https://reviews.llvm.org/D26814