[Bug c/34455] New: Request warning for casts to _Bool

[hpa at zytor dot com]

I recently finished converting a large codebase from using "int" to using
"bool" (i.e. _Bool) for booleans.  This is a big win for debuggability. 
However, unfortunately the code has to be portable to inferior compilers which
don't have _Bool implemented yet; for those we use:

typedef enum { false, true } bool;

As such, it would be a very nice thing to have an optional warning for any
conversions of non-boolean objects (those not known to contain only 0 or 1) to
_Bool using either an implicit conversion or a cast.  The "safe" way to do it
in a backwards-compatible way is using the !! pseudo-operator.


-- 
           Summary: Request warning for casts to _Bool
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: hpa at zytor dot com
 GCC build triplet: all
  GCC host triplet: all
GCC target triplet: all


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34455