I am having a difficult time distinguishing two legal lines of code:
ID = expression
and
ID(exp1, exp2, ...) = expression
I tried this rule:
stat: expr NEWLINE -> expr
| (ID OPENP .* CLOSEP GETS)
=> ID OPENP actualParameters CLOSEP GETS expr NEWLINE
-> ^(INDEX ID OPENP actualParameters CLOSEP expr)
| ID GETS expr NEWLINE -> ^(GETS ID expr)
| NEWLINE ->
;
But it says that alternatives 2 and 3 can never be matched. How do I
"reactivate" 2 and 3?
DMS
David M. Smith http://www.cc.gatech.edu/fac/David.Smith
Georgia Institute of Technology, College of Computing
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