[fpc-devel] "Blank slate" next version of FPC

[Sven Barth]

Am 22.02.2019 um 07:06 schrieb Paul van Helden:
> On Fri, Feb 22, 2019 at 2:35 AM Ben Grasset <operator97 at gmail.com 
> <mailto:operator97 at gmail.com>> wrote:
>
>
>     On Sat, Feb 16, 2019 at 5:44 PM Benito van der Zander
>     <benito at benibela.de <mailto:benito at benibela.de>> wrote
>
>         it can turn out the enumerators are slower than an old school loop
>
>
>     The trick with enumerators is to never make them classes, and use
>     advanced records instead, I've found. This way you avoid the heap
>     allocation and the implicit try/finally. Also make sure you inline
>     the MoveNext and GetCurrent!
>
>  How do you make a (for in) enumerator with a record? I don't use them 
> for exactly this reason, and they did seem to be another useful 
> language feature that turned out to be poorly implemented by 
> Embarcadero. (Haven't checked with FPC).
Just as you would a class (an object is fine, too, by the way). You can 
take a look at the testcase here: 
https://svn.freepascal.org/cgi-bin/viewvc.cgi/trunk/tests/test/tforin25.pp?view=markup

Regards,
Sven
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