On 14.02.2012 19:33, Juha Manninen wrote:
2012/2/14, Sven Barth<pascaldra...@googlemail.com>:
Am 14.02.2012 06:45, schrieb Carver413:
doesn't generics more or less duplicate the class every time you use it
with
different type, and if so would this not cause alot of bloating ?
Yes it does. So for embedded systems "use with care" ;)
Oh, that is bad!
C++ templates generate lots of duplicate code.
Java's generics do not because it is just "syntactic sugar" allowing
the compiler to check types which IMO is enough for most purposes. You
don't need ugly type-casts but code-generation is not affected.
Perfect.
I know Delphi's and FPC's generics are different but I believed the
compiler is clever enough to use the same class when possible. For
example, in all cases where objects inherited from TObject are stored
in a container, the same container could be used.
Such logic unnecessarily complicates the compiler. Generics are already
troublesome enough.
This indirectly answered another question I had in mind: Does a
generics container for a char or integer use the minimum needed amount
of memory?
If the container uses thinks like "SizeOf(T)" (where T is the generic
type parameter) and such then it does use the least amount of memory. A
specialization is basically a reparsing of the generic as if T was the
specialization type all along.
I guess it does when a new instance of the container class is generated.
Sorry, but I don't understand what you mean here.
As long as one knows of the disadvantages of generics there is no
problem in enjoying their advantages.
Regards,
Sven
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