caching parse tree object

[janikFrick]

Hi,
I use antlr for a translation task. My translator is written in python and I use the visitor pattern.
This requires multiple steps and calls of my software with the same input but different parameters.
The translation itself is quite fast, even on larger inputs.
But the creation of the parsetree takes quite some time is the creation of the parse-tree object.
The idea was to cache the tree in a file, but the context is not serializable. The second thought was to keep it alive in a seperate process or sth like this, but the time betwenn the different calls for the different steps can vary a lot, so this would not be really applicable.

Does anyone have an idea how i could manage this situation?

[davdres]

I'm not sure where this code originally came from, but I've used variations of it in several projects. It's not python but maybe it will help.

AstTreeWriter.java

[janikFrick]

@davdres thanks for reaching in with this, I'll have a look at it :)

[janikFrick]

I tried and converted it to python using ai. It works fine, but its not applicable for my use case. I need to store the full tree with all the context objects, etc. so I can restore it later.
But I appreciate your response