Existential Operator / Null Propagation Operator
waldemar at google.com
Thu Oct 29 23:07:28 UTC 2015
On 10/29/2015 14:20, Claude Pache wrote:
>> Le 29 oct. 2015 à 19:32, Eli Perelman <eli at eliperelman.com> a écrit :
>> 2 dots may be problematic when parsing numbers (yeah, I know it's probably not common, but it's still valid):
>> Eli Perelman
> Treating `..` as one token would be a breaking change,
Exactly what existing code would it break?
> but I don't think it is a problem in practice, as `3..toString()` would continue to work.
It would continue to work for the trivial reason that `3..toString()` doesn't contain a .. token. It's the number 3. followed by a . and then an identifier and parentheses.
This is no different from 3.e+2 not containing a + token.
In some cases – as in `3..toStrign()` –, `undefined` will be produced where an error was thrown.
No, this would continue to throw an error.
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