[Bug preprocessor/53690] [C++11] \u0000 and \U00000000 are wrongly encoded as U+0001.

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53690

--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> 2012-07-08 
21:44:28 UTC ---
For the record,
http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2170.html changed the
behaviour so UCNs corresponding to control characters are allowed in character
and string literals.