Object.factory() and exe file size bloat

[H. S. Teoh via Digitalmars-d]

On Fri, Aug 21, 2015 at 05:15:00AM +0000, deadalnix via Digitalmars-d wrote:
> On Friday, 21 August 2015 at 05:06:47 UTC, Walter Bright wrote:
> >This function:
> >
> >  http://dlang.org/phobos/object.html#.Object.factory
> >
> >enables a program to instantiate any class defined in the program. To
> >make it work, though, every class in the program has to have a
> >TypeInfo generated for it. This leads to bloat:
> >
> >  https://issues.dlang.org/show_bug.cgi?id=14758
> >
> >and sometimes the bloat can be overwhelming.
> >
> >The solution seems straightforward - only have Object.factory be able
> >to instantiate classes marked as 'export'. This only makes sense
> >anyway.
> >
> >What do you think?
> 
> Wait ? Why only classes marked export ? I don't follow the reasoning
> here.

Because if your code imports the module that defines the class, you
already know the class name (either by design, or by compile-time
introspection) so you don't need to use the object factory.  It's only
when you want to dynamically load new classes at runtime that you didn't
know about at compile-time, that you need to use the object factory --
and that's also when you'd mark classes as 'export'.

Makes sense to me.


T

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