[antlr-interest] Re: Building trees with the correct associativity

Paul J. Lucas pauljlucas at mac.com
Thu Dec 2 01:00:51 PST 2004


On Thu, 2 Dec 2004, Monty Zukowski wrote:

> Well, at least that one is easy:
> 
> addExpr
> 	:
> 	mulExpr ( (PLUS^ | MINUS^) mulExpr)*
> 	;

	Yes, but I originally wanted to avoid trees like:

		ADD_EXPR
		   |
		   +
		   |
		   3--4

	i.e., two levels of depth and instead have:

		ADD_EXPR
		   |
		   +--3--4

	But I've given up so I can get left-associativity easily.

	- Paul



 
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