Re: Ambiguous character literals

[Robert Dewar <robert_dewar@my-dejanews.com>]

In article <7fr2hr$sak$1@nnrp1.dejanews.com>,
  adam@irvine.com wrote:
>
>
> I think this program should fail to compile, but GNAT
> 3.10 doesn't give any error messages.  Am I interpreting
> the RM correctly?

Yes, you are, and both 3.10 and 3.11 versions of GNAT
incorrectly allow this construction. Version 3.12 (which
we hope to release shortly), will give:
     1. procedure test1 is
     2.     type etype is ('d', 'c', 'b', 'a');
     3.     type etype2 is ('a', 'b', 'c', 'd');
     4.     b : boolean;
     5. begin
     6.     b := ('d' < 'b');
                  |
        >>> ambiguous character literal
        >>> candidate interpretations: Character,
                                       Wide_Character
        >>> candidate interpretation: type "etype2" defined
                                      at line 3
        >>> candidate interpretation: type "etype" defined
                                      at line 2

     7. end test1;

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