On 3 January 2012 21:01, Brendan Eich <bren...@mozilla.com> wrote: > On Jan 3, 2012, at 1:29 AM, Andreas Rossberg wrote: >> On 3 January 2012 07:21, Brendan Eich <bren...@mozilla.com> wrote: >>> The top level is hard. The only way to be sure is to use pure lexical scope >>> (in Dave's proposal, use module {...}). >> >> Ah, but wrapping into modules is incompatible with having multiple >> script parts. > > I don't know what you mean. "Incompatible" in the sense that you cannot > transform multiple scripts into multiple anonymous modules?
Yes. >> For multi-part scripts we need a way to switch the >> _proper_ top-level into extended mode. Or should I not be able to >> write (the relevant bits of) a multi-part script in extended mode at >> all? > > The proposal may have been unclear on this point: the top level would allow > as much new syntax and semantics as can be tolerated backwards-compatibly. > The hard cases are let, lexical scope in the free-variables-are-errors sense > Dave described (extant globals at start of module body are imported), and any > runtime shifts we want (completion reform, typeof null). I suspect there may be other subtle issues, e.g., what about `const' and local functions? [I see, Allen mentioned that already.] In any case, even if we allow more features in classic mode, that still doesn't give you the ability to use _all_ Harmony features for multi-part scripts. I think we need a proper story for this. [I just saw that later down the thread Mark proposed reusing strict mode as an opt-in for full Harmony. I reply to that separately.] /Andreas _______________________________________________ es-discuss mailing list es-discuss@mozilla.org https://mail.mozilla.org/listinfo/es-discuss