Hi Derek,
By "incremental parsing" I don't think you mean "on demand loading of
input" per Robert's response. I think you mean being able to reparse
only those pieces of the input that have changed while editing. For
this, you need to save the state as you say later, which is difficult
for recursive descent parsers. Well, at least in a language like
Java without continuations. Fortunately, you can fake this easily
with recursive descent parsers. The idea was designed/prototyped by
Prashant Deva, author of ANTLRStudio, and he and I will formalize,
generalize, and integrate with ANTLR v3 after I get the first release
out. Then, will write up and push out even if just to SIGPLAN notices.
Ter
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