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The 'latest revision of the future specification' you link to is, I think, the set of things the TC39 group has considered and agreed on. The list of things they are currently considering is in the strawman namespace[1] on that wiki. In particular, the "strawman:concurrency" page[2] currently says:

The infix “!” operator: An eventual analog of “.“, for making eventual requests look more like immediate requests.

[1]: http://wiki.ecmascript.org/doku.php?id=strawman:strawman [2]: http://wiki.ecmascript.org/doku.php?id=strawman:concurrency




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> But... surely that code is far more "insanely stupid[-looking]" than the first...?

I don't think anyone is arguing that x\n!p is a good way to write code. Crockford is pointing out that ASI will not occur when ! is an infix operator.




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