[antlr-interest] Producing multiple output file from a single AST - best strategy?

[Voelkel, Andy]

Hi,

I have a project where I have to produce multiple output files (C source files) from a single AST. It seems clear at this point that using StringTemplate to produce the output files makes the most sense. So how do I get multiple StringTemplate "streams" from a single AST? I can think two ways:


1.       Write separate tree grammars to produce the separate outputs, using built-in ANTLR-to-StringTemplate integration.

2.       Write one tree grammar, and use helper functions to build the separate outputs using manual creation of StringTemplates.

3.       Or is there another way?

Approach #1 has the advantage of being able to use the built in integration between ANTLR and StringTemplate. But the disadvantage is that if I change the AST structure, I have to change all the tree grammar files, rerun the code generation, etc. Right now I'm leaning towards the helper functions which construct StringTemplates manually. Does anyone have any advice? I'm assuming that I can't use ANTLR-StringTemplate integration and also produce multiple StringTemplates with a single tree grammar. Do I have this right?


-          Andy

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