[fpc-devel] Bug 4004

[Colin Western]

Gerhard Scholz wrote:
<snip>

>It seems that the compiler now sees a "ord(c)" to be a BYTE, and BYTE - BYTE
>shall give a BYTE, and -1 is not in the range allowed for a BYTE.
>  
>
Thanks for taking a look at this. I am reasonably sure that this 
beheviour is wrong, (otherwise you could never take the difference 
between unsigned values) but I was concerned that as it was flagged 
unreproducable on the bug tracker I had messed up my compilation of fpc 
in some way. As it seems I havn't, perhaps I should re-submit it.

>The line " i := Ord('0')-Ord('1') " in the main program is not interesting,
>since it contains a constant expression and is converted to " i := -1 " by
>the compiler.
>  
>
... though this should have given a compile time range check error 
because the types are the same

Colin