[fpc-pascal] Labels

Adriaan van Os adriaan at adriaan.biz
Tue Dec 19 05:43:30 CET 2023


Jean SUZINEAU via fpc-pascal wrote:
> 
> Le 17/12/2023 à 17:47, Adriaan van Os via fpc-pascal a écrit :
>> Turbo Pascal (5.5) defines
>>
>>     label = digit-sequence . 
> Are you sure ?
> I had a doubt and I had a look in some very old source code from 1990 
> made with tp 5.5, it seems you could have letters in labels.

You are right. I have a printed cope of the Turbo Pascal 6.0 Programmer's Guide and it says, 
confusingly, on page 16

	"The digIt sequence for a label must be in the range 0.9999"

and on page 8

	"A label is a digit sequence in the range 0.999".

but on page 9

	"As an extension to Standard Pascal, Turbo Pascal also allows identifiers to functions as labels.

Regards,

Adriaan van Os



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