Karoly Balogh to Anton Shepelev:
>>According to Borland's official language guide to
>>Turbo Pascal 7.0,
>>
>> To be used as procedural values, procedures and
>> functions must be declared with a 'far' directive
>> or compiled in the '{$F+}' state.
>>
>>whereas Free Pascal in -Mtp seems to accept any
>>non-system procedure or function as a value of a
>>procedural type. Is it an instance of TP incompat-
>>ibilty or am I missing something?
>
>It's documented, that Free Pascal ignores far and
>near directives because they were for 16bit code,
>and have no meaning in 32bit or 64bit code:
>
> https://www.freepascal.org/docs-html/user/usersu82.html
>
>Therefore it's logical that the compiler also ig-
>nores their absence.
Ignoring them in the sense of not affecting the gen-
erated machine code is perfectly OK, but not requir-
ing their presence in the source, to make the pro-
gram compilable in Turbo Pascal, seems wrong when
Free Pascal is in Turbo Pascal mode. A program that
Free Pascal compiles successfully in TP mode should
work with the actual Turbo Pascal compiler. Is it
not the purpose of these modes? Do they guarranty
only forward-compatibility?
>Although this documentation should probably be up-
>dated, because we now support some 16bit and 8bit
>systems as well.
There is more to correct, e.g.:
In Free Pascal, you need to use the address @ opera-
tor when assigning procedural variables.
This is not true of TP mode.
>But I'm pretty sure you can find a bunch of other
>things, which FPC allows even in TP mode, but TP
>disallows/doesn't support, just because the amount
>of extra features in the language since TP was
>out...
I think such features should be available in Delphi
and FPC modes, but not in TP, which should implement
and enforce Pascal in exactly the way it was sup-
ported in the historical Turbo Pascal compiler.
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