What does caret dot (^.) mean?

Question

What does the below Pascal code mean?

p^.rlink=q
q^.llink=p

Answer 1

The pascal operator ^. is similar to operator -> in C and C++.

It dereferences the pointer (in your case, p should be defined as var p: ^type) and accesses a variable in the record, in this case, rlink and llink.