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|
tree grammar Simplify;
options {
tokenVocab=VecMath;
ASTLabelType=CommonTree;
output=AST;
language=CSharp3;
filter=true;
//rewrite=true;
}
@members
{
public override IAstRuleReturnScope Topdown() { return topdown(); }
public override IAstRuleReturnScope Bottomup() { return bottomup(); }
}
topdown
: ^( MULT INT ^(VEC (e+=.)+) ) -> ^(VEC ^(MULT INT $e)+)
;
bottomup
: ^(MULT a=. b=INT {$b.int==0}?) -> $b // x*0 -> 0
;
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