[fpc-devel] BOOL

[Michael Van Canneyt]

On Sun, 14 Dec 2014, Florian Klämpfl wrote:

> Am 14.12.2014 um 20:25 schrieb Michael Van Canneyt:
>>
>>
>> On Sun, 14 Dec 2014, Florian Klämpfl wrote:
>>
>>> Am 14.12.2014 um 18:05 schrieb Adriaan van Os:
>>>>> IMHO using the for loop on a non pascal boolean type is simply wrong. At the
>>>>> very least the assumption that the false and true are successive, and maybe
>>>>> even using BOOL as loopvar in the first place.
>>>>
>>>> The compiler accepts it.
>>>
>>> Can somebody with access to delphi please check, if it compiles
>>>
>>> var
>>>  b : bytebool;
>>>
>>> begin
>>>  for b:=false to true do
>>>    ;
>>> end.
>>
>> D7 and Delphi XE5 compile it but do not generate code, instead say:
>> 'FOR or WHILE loop executes zero times - deleted
>> variable b is declared but never used in ...
>
> But it generates code for
>
> var
>  b : bytebool;
> begin
> for b:=true to false do
>   ;
> end.

Yes, it does. Strange behaviour :)

Michael.