Joseph Spencer wrote:
My apologies on that one. I meant to type the following:
PostfixExpression:
LeftHandSideExpression [no LineTerminator here] ++
LeftHandSideExpression [no LineTerminator here] --
PrefixExpression:
++ [no LineTerminator here] LeftHandSideExpression
-- [no LineTerminator here] LeftHandSideExpression
It appears to me that as currently written the following is considered
valid sytax:
++++someVar;
Yes, that is goofy. It dates back to ES1 -- if memory serves (and it may
not at this late date), my original Netscape 2 "Mocha" JS engine did not
parse this.
However, I think it may fall out of a desire by Microsoft back in the
ES1 days to support the goofy ability of "host objects" to return
References (ECMA-262 spec term).
I hadn't thought about es3 compatability though, so I could see the
reasoning in keeping it as is.
Yeah, engine implementors have no good incentive to tweak here, and some
legitimate fear of a breaking change that would only lose market share.
/be
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