At 06:07 29/08/2008, Terence Parr wrote:
>Note that you can improve the speed slightly when you are
grammar
>by removing unnecessary tree stuff.
>
>> primary_expression
>> : INTEGER
>> -> ^(INTEGER)
>> | '(' expression ')'
>> -> expression
>> ;
>
>primary_expression
> : INTEGER
> | '(' expression ')' -> expression
> ;
If the second one is faster than the first, does that mean that
the below would be faster than the second? Or are they
equivalent?
primary_expression
: INTEGER
| '('! expression ')'!
;
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