Re: [Pharo-dev] [Reflectivity] Tiny progress of the day: MetaLink

Le 2 mars 2015 05:38, "Marcus Denker" <marcus.denker@inria.fr> a écrit :

Hi,

The tiny progress of today: I reviewed the code for the MetaLink from

Clara’s Breakpoints

and added it to Pharo4.

Yay! There was also one extension method in Slot to make work with those, have you seen it? I has as state:

metaObject the target selector what to call arguments which args? condition true, false or [block evaluating to a boolean] control before, after, replace… level active at base or meta level? (to stop meta-recursion) nodes where it is installed.

------ Examples -----

MetaLink new metaObject: Halt; selector: #now.

MetaLink new metaObject: [ self halt ]; selector: #value.

MetaLink new metaObject: #node; selector: tagExecuted

or one that can only be installed on Message send:

MetaLink metaObject: #object; selector: perform:withArguments; arguments: #(selector arguments); control: #replace

Of course, the real core of the whole things is next: An AST transforming

compiler plugin

that takes these links into account. Of course, exact details might change (e.g. control using symbols or classes (ControlBefore)”, do we call it instead, replace or even AOP-style “around”?

The first will be just a #before with no arguments, as this is what we need for simple breakpoints.

Marcus