[Bug c/30020] improve diagnostics for limited range warning for a switch statement

[manu at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=30020

Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2014-05-30
                 CC|                            |manu at gcc dot gnu.org
            Summary|missing limited range       |improve diagnostics for
                   |warning for a switch        |limited range warning for a
                   |statement                   |switch statement
     Ever confirmed|0                           |1

--- Comment #2 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
GCC now warns by default for this, but the location sucks.

test.c: In function ‘foo’:
test.c:3:3: warning: case label value is less than minimum value for type
   switch (c) { case -1: return -1; };
   ^

It would be nice if it said which type.

Clang says:

test.c:3:21: warning: overflow converting case value to switch condition type
(-1 to 255) [-Wswitch]
  switch (c) { case -1: return -1; };
                    ^