joe wrote:
That's a good point. Are lexical non-DFA grammars allowed? It would
be trivial to solve that with a regular expression lookahead.
Although I suppose at that point you might as well call it a cover
grammar.
We must avoid being too clever -- it complicates implementations and
inevitably incurs future-hostility to extensions we may want, if not
outright bugginess.
All of this suggests prefix ? is the better course. Anyone have
counterexamples?
/be
Joe
On Mon, Apr 6, 2015 at 2:42 PM, Brendan Eich <bren...@mozilla.org
<mailto:bren...@mozilla.org>> wrote:
joe wrote:
By the way, I don't remember having grammar issues (I use a
LALR compiler-compiler). Looking at my code, it looked like I
handled it in the tokenizer stage; I added a COND_DOT token:
COND_DOT : \?\.
Did you keep backward compatibility? `x?.1:y` must continue to work.
/be
No, it looks like I didn't.
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