[stringtemplate-interest] Listing of used Attributes (@Caleb)

[Terence Parr]

On Jul 10, 2007, at 10:12 PM, Dreyer Ulf (CR/APA3) wrote:
>  template applications would probably be difficult with added  
> listeners:

I just meant for debugging.

>
>  Examble:
>  SomeTemplate() ::= << <it.foo> and <it.bar> >>
>
> [...]
>  <someList:someTemplate()>
>
>  In this case if we someList is empty (because we just want to find  
> out about
>  used attributes) someTemplate will not be executed and someList 
> [].foo/.bar will
>  not be "found", am I right?

correct.  They were not accessed.  Do you want the static list?  I  
think i have some stuff in there now for that.

>  I slappted together a parser (handwritten but one could probably  
> use a treeparser)
>  which analyses the AST of all actions.
>  There are some problems with recursion and anonymous templates are  
> not implemented
>  but it produces a tree wich looks like this for the above example:
>  [...]
>  |
>  +someList
>     |someList.foo
>     +someList.bar
>
>  Now I can analyse any stringTemplate and get a suggestion of what  
> a datastructure
>  fed to the top-template should look like.

Cool. I think I have some recursive method that walks ST expression  
trees and answers this, but it can't do dynamically computed  
attribute names.

Ter