Hello, Currently I'm working on my first tree grammar after reading the definitive ANTLR reference. Personally I love the concept of tree grammars, but there are some things that seem a bit unlogical to me. Why do you have to specify "tree matching rules" after having specified recognition rules and rewrite rules? Wouldn't it be allot more productive and most definately less error-prone to extend a parser grammar and only overwrite the rules in which you want to embed action code? Just imagion having a project with a dozen tree grammars and somthing changes in the parser grammar, e.g. two nodes are swapped, you would have to change all tree grammars. Not the mention the amount of duplicate code you would have to write.
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