=/ was my typo, it's not in the specification. But see below:
>From: Brendan Eich [mailto:[email protected]] >Sent: Monday, March 23, 2009 11:57 AM ... >If you make the /= correction, there is no ambiguity. 7.1 last paragraph: > >Note that contexts exist in the syntactic grammar where both a division and a >RegularExpressionLiteral are permitted by the syntactic grammar; however, >since the lexical grammar uses the InputElementDiv goal symbol in such cases, >the opening slash is not recognised as starting a regular expression literal >in such a context. As a workaround, one may enclose the regular expression >literal in parentheses. It's actually in 7 not 7.1. However the problem is that RegularExpressionLiteral doesn't even occur in the syntactic grammar so strictly speaking there are no such specified contexts. >... >>This isn't a new ES3.1 problem. Nothing has changed from the ES3 >>specification in this regard. Am I missing something obvious? Obviously >>this can't be unambiguously specified in the grammar but it sure seems like >>there should be some sort of comprehensible specification of exactly when >>RegularExpressionLiteral is allowed. >I think that's 7.1. I don't think so, although perhaps the fix is as easy as adding RegularExpressionLiteral as an alternative RHS for PrimaryExpression. As it stands right now, I still content that the specification does actually say how a RegularExpressionLiteral can be used in an expression. I think this is only discoverable by examining existing implementations. Allen _______________________________________________ Es-discuss mailing list [email protected] https://mail.mozilla.org/listinfo/es-discuss
