Posted by Mark Rizun on Nov 10, 2014; 1:38pm
URL: https://forum.world.st/AST-copy-behavior-tp4789447.html

Hi guys!

I'm using AST really often, and recently stumbled on problem with copying an AST.
It doesn't copy stuff related to computing sourceInterval of AST, and I need it to copy:)

I know there are #deepCopy and #veryDeepCopy, but they are too heavy methods for AST, especially in my case, as I need to copy AST all the time.

Earlier, I discussed this problem with Marcus Denker. He suggested to fix #copy of AST (to be more accurate #postCopy).
If I want to copy stuff related to sourceInterval, I would have to implement #postCopy for each RBNode... differently.

RBProgramNode>>#postCopy
        super postCopy.
        properties := properties copy

So for each RBNode... it will be like:

RBNode...>>#postCopy
        super postCopy.
        "here some different code each time"

I'm just interested: What do you think about it?

Thanks,
Mark