[Bug c++/53661] [gcc-4.7/4.8 regression] Wrong narrowing conversion warning with -std=c++11

[manu at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53661

--- Comment #8 from Manuel López-Ibáñez <manu at gcc dot gnu.org> 2012-09-14 
14:07:21 UTC ---
Wconversion does not warn either, but it also does not warn for:

enum Code {
  SUCCESS=-1
};

Code a;
void foo(void)
{
  unsigned int r;
  r = a;
}

Perhaps the code for handling this could be shared between Wconversion and
Wnarrowing (they warn in different cases but finding out these cases probably
requires similar code).