W liście LAUPRETRE François z dnia środa, 12 września 2007 12:38:
> >
> > What do you mean by "try both"? Could you explain a bit more on that?
>
> Yes. PHK's autoload handler is not filename-based. It works as a (poor
> man's :) runtime linker, with a symbol map. In this map, interfaces and
> classes have different symbol types. Today, when this handler receives a
> request, it cannot know if it should look for an interface or a class. So,
> it has to search both in turn.
>
> Please consider that filename-based autoload handlers are just a primitive
> implementation. If you consider only this family of handlers, that's right:
> getting the symbol type is not very important. But, with smarter map-based
> autoload handlers, it becomes very interesting to extend the feature to
> functions and, there, providing the symbol type along with the requested
> value becomes mandatory.
>
But how can interpreter know if it's looking for class or interface? There are
obvious cases (class X implements Y, class A extends B, interface A extends
B), but what with following language construct:
function doSomething (Service s) {...}
PHP tries to autoload type Service, but it can't know if it's looking for
interface or class. Both are possible.
--
Paweł Stradomski
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