Op Sun, 15 May 2011, schreef Joerg Schuelke:
Am Sat, 14 May 2011 20:46:30 +0200 (CEST)
schrieb Daniël Mantione <daniel.manti...@freepascal.org>:
Inlining is better that doing the same with macro's, so is the use of
str/val better than macro tricks.
Wherever you can!
If I do some low level system work, it is possibly better to do it with
a macro.
If I have a project where rtti is needed anyway, I would be dumb not to
use it instead of a macro, if it fits the needs.
Even if you have a project where RTTI is not needed, you would be thumb
not to use it instead of a macro. Really. There is no drawback.
What is the need of rtti: pointer to base classes do not know
to which possibly derived class they point. Thats why *runtime* type
information.
You are completely mistaken. This is what C++ uses RTTI for. FPC (nor
Delphi) does not use RTTI for this purpose at all! We have the typeof
function for this, which returns a pointer to the VMT. I even have no idea
wether the RTTI can be used for this purpose at all :)
All other things which you use in your program do not need
runtime type information, they always know who they are. If I do not
use objects or classes I have therefor no need for runtime type
information.
You are wrong again. Ansistrings/widestrings/variants and so on make use
of RTTI.
To get the associated name of an enum? Thats compile time information.
Then show a practical example where having it at compile time is a real
benefit. Please understand it clear: We are not against new features, but
there must be a benefit.
If there is a need for this it should be delivered to me by something
like {$I %enumname%enum%}, I think you would not like to have it this
way. But {$I %color%red%} will hopefully give 'red'. While {$I %color%}
maybe gives then 'red,green,blue' :-)
What is the need of a macro processor:To change the handwritten code in
an automated way. Is this a bad idea? Are there no needs for this?
For example to hold to lists with same entries under all circumstances
in sync. A macro does this in the simplest manner.
If you have an need for changing your handwritten code in an automated
way and you do not have macros, what would you use then? LaTeX? an IDE
tool?, m4? or inventing an compiler feature, but then do not call it
rtti, call it a macro. (thats pretty polemic, don´t worry)
Feel free to come up with examples and convince us. They need to be
examples of code that is much more awkward to write without macro's.
Daniël
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