[Bug libstdc++/49022] [C++0x][DR 2058] std::begin and std::end specialized for std::valarray with some operators are missing.

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49022

--- Comment #20 from Paolo Carlini <paolo.carlini at oracle dot com> 2011-06-14 
13:22:13 UTC ---
I'm not sure, really. I'm going to attach a variant which more explicitly only
uses return by const ref and shows the same fundamental problem for me.