brendan at mozilla.com
Fri Feb 1 12:42:35 PST 2013
Claude Pache wrote:
> In case (1), there is no ambiguity with the conditional operator. In
> case (2), one has to further analyse where a Pattern could appear.
Patterns can appear in formal parameter position, on the left of
assignment ('=', not '+=' etc.), on the left of '=' in an initialized
binding. I forgot about parameters in my suggested lookahead
restriction, but the closing ')' is easy to handle and cannot occur
legally after '?' in a ConditionalExpression.
So, lookahead restriction FTW! Or at least, let's get on with our lives.
It saves having to duplicate most of the expression grammar a la the
hated -NoIn productions.
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