[SOLUTION] Re: [antlr-interest] Again: Source code position

[Matthias Kempka]

Matthias Kempka wrote:

>Hello all,
>
>I'm aware that I'm not the first one to ask this question, but neither
>the FAQ nor the mailing list archive give me answers that I can work
>with, so here's my problem:
>
>I'm working with ANTLR 2.7.5 and the Java 1.5 Grammar by Michael Studmann.
>What I need is the source code position of an element in the AST.
>
>I see that the tokens that are created by the lexer have exactly the
>information I need. So I subclassed the CommonAST with a class named
>TokenPreservingAST. In the section Tokens{} in the Grammar I added the
>information which tokens should be represented by a TokenPreservingAST
>object.
>  
>
When I don't care about the Tokens{} in the grammar, but call

myParser.setASTNodeClass(TokenPreservingAST.class.getName());

before calling myParser.compilationUnit(), the ASTs are initialized correct.

Maybe, this is a thing for the FAQ.

Regards,
Matthias Kempka