January 2013
Intermediate to advanced
328 pages
8h 5m
English
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Altering ANTLR’s Code Generation
ANTLR uses two things to generate code: a StringTemplate[54] group file (containing templates) and a Target subclass called LanguageTarget where Language is the grammar language option. The StringTemplate group file is org/antlr/v4/tool/templates/codegen/Language.stg. If you would like to tweak the code generation templates for, say, Java, all you have to do is copy and modify org/antlr/v4/tool/templates/codegen/Java.stg. Then, put it in the CLASSPATH before ANTLR’s jar. ANTLR uses a resource loader to get those templates so it’ll see your modified version first.
The templates just generate code specific to a grammar. Most of the common functionality has been factored out into the runtime library. So, Lexer ...
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