[Bug preprocessor/22168] #if #A == #B should have a diagnostic in ISO C mode

[schwab at suse dot de]

------- Additional Comments From schwab at suse dot de  2005-06-24 22:41 -------
The standard does not allow to extend the syntax.  Since this violates the 
syntax of the language a diagnostic is required. 

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22168