[cfe-dev] SwitchStmt cond type and EnumConstantDecl type problems

Chris Lattner clattner at apple.com
Wed Feb 3 12:40:23 PST 2010

On Feb 3, 2010, at 11:43 AM, Sebastian Redl wrote:

> Douglas Gregor wrote:
>> Actually, I take that back: there may not be a bug here :)
>> GCC 4.2 on my platform has Z=4294967286, unless you compile with "- 
>> pedantic", in which case it complains and then has Z=-10.
> Huh, I thought GCC's -pedantic is only about warnings, not behavior.

There is a fixme in GCC's code about this exact case:

build_enumerator (tree name, tree value)
  if (pedantic && !int_fits_type_p (value, integer_type_node))
       pedwarn ("ISO C restricts enumerator values to range of %<int 
       /* XXX This causes -pedantic to change the meaning of the  
          Remove?  -zw 2004-03-15  */
       value = convert (integer_type_node, value);


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