Existential Operator / Null Propagation Operator

Brendan Eich brendan at mozilla.org
Mon Apr 6 21:42:46 UTC 2015

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.


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