Ludvig Strigeus wrote:
With Bison, you can do something like this (not quite bison syntax):
myrule: TYPE IDENT {DoSomethingRightAfterIdent($1,$2); } LP more_rules
RP; {DoSomethingAfterEverything($1,$2,$5); }
I.e. you have a chunk of C code that's called in the middle of the
processing of the production. (In the above case right after TYPE
IDENT)
Can you do this with lemon?
I don't know if you can do it bison-style, but you can do this:
1) have a struct that wraps a TYPE(T) and IDENT(I).
2) myrule : prefix(P) LP more_rules(R) RP . { /* process rule */ }
3) prefix(P) : TYPE(T) IDENT(I) . { /* process ident; wrap T and I in
the struct from (1); */ }
4) remember to set the default destructor of the prefix rule to destroy
the struct from (1).
I know you can do something like this for other cases,
myrule ::= TYPE(T) IDENT(I) temp LP more_rules(R) RP. {
DoSomethingAfterEverything(T,I,R); }
temp ::= DoSomethingRightAfterIdent(...how would I access TYPE/INDENT
from here..);
but it doesn't quite work for this case...
Any ideas?
/Ludvig
HTH
Ulrik Petersen
--
Ulrik Petersen, PhD student, MA, B.Sc.
Aalborg University, Denmark
