On Wed, 15 Feb 2012, Sven Barth wrote:
Am 14.02.2012 22:28, schrieb Marco van de Voort:
In our previous episode, Sven Barth said:
Afaik it was the main reason to implement generic constraints in Delphi
(like
.NET)?
Constraints allow the compiler to infer further information on the given
types to improve e.g. type checking when parsing the generic,
Exactly. You e.g. know that the unspecialized generic is already meant for
reference types, from line one.
but they won't magically allow the compiler to not duplicate code (in
theory it would be possible to do something like Java's generics for cases
where the constraints are for descendants of TObject or IInterface, but in
my opinion the tradeoffs (increased compiler complexity) are not worth
it).
Yeah, that is typical. If it is not used inside the compiler it is
unoptimized :-)
Maybe redo cclasses with generics?
That wouldn't change that much... the performance of specialized generics
isn't that different from "normal" code.
I tested that. It's about 10% slower.
Michael.
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