[antlr-interest] Transforming AST subtrees in TreeParser with "buildAST = false"

[micheal_jor]

Is this possible?

Having created an AST from a source file, I would like to correct some
minor [context-sensitive] recognition errors by tranforming specific
expression subtrees.

I am using a TreeParser but with buildAST=false to avoid redundant
"copying" of most of the nodes in the AST. They are untouched by the
minor transformations.

I guess I have two questions really:

1. In a TreeParser, is it possible to specify that "buildAST=true"
only for certain rules or rule-Alternatives. The rest of the AST is
left as is (it is "copied" to output logically but no *actual* copying
is done).

2. Failing (1), is it "safe" (advisable?) to include tree tranforming
statements in the action code of TreeParsers with buildAST=false. I am
aware that the tree construction/transformation shortcut notation
would be unavailable in this case.

Cheers,

Micheal




 
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