c239f18 Add back support for explicit_arity mode on constructor expressions and patterns, now relying on an attribute. This has been requested to preserve Camlp5's behavior.

Authored and Committed by Alain Frisch 10 years ago
    Add back support for explicit_arity mode on constructor expressions and patterns, now relying on an attribute.  This has been requested to preserve Camlp5's behavior.
    
    git-svn-id: http://caml.inria.fr/svn/ocaml/trunk@14595 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02
    
        
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