ANTLR expressions rewrite intermediate tree

Posted by user313856 on Stack Overflow See other posts from Stack Overflow or by user313856
Published on 2010-04-11T10:47:36Z Indexed on 2010/04/11 10:53 UTC
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antlr

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expression

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tree

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evaluate

For expressions like 3+4 I would like to use the value 7 in an intermediate representation tree.

I cannot work out how to get the returns value into a rewrite rule.

expression returns [int v]: etc.

How do I get expression.v into WR? At the moment I get (+ 3 4), I want (7)

|^( WRITE c=expression) -> ^(WRINT ^(INTC ^($c))

the next step is to emit 7 in an assembler.

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