[fpc-devel] [Suggestion] Enumeration range-check intrinsic

[J. Gareth Moreton]

Hi Michael,

I'm glad we agree on the "is" operator.  Personally I would like to 
extend it so it accepts "if (I is TMyEnum) then" when I is also of type 
TMyEnum, since it may be the case that you're reading I directly from a 
stream, either individually or as part of a record, in which case 
converting I from an Integer to TMyEnum is a little inconvenient.  When 
you get down to the compiled assembly language it shouldn't really 
matter anyway.

For enumerations with holes, having "is" return False if a value is 
within one of these holes would require more complex code, at least to 
work out how to programmatically cover these holes with conditions and 
not pollute the simpler version where all elements are contiguous.

Gareth aka. Kit


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