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I have no idea which proposal you're talking about. On Thu, Nov 8, 2018, 08:18 Dan Aprahamian <[email protected] wrote: > Is there a good way to get involved in the development of this proposal? > > On Thu, Oct 18, 2018 at 8:01 AM <[email protected]> wrote: > >> Send es-discuss mailing list submissions to >> [email protected] >> >> To subscribe or unsubscribe via the World Wide Web, visit >> https://mail.mozilla.org/listinfo/es-discuss >> or, via email, send a message with subject or body 'help' to >> [email protected] >> >> You can reach the person managing the list at >> [email protected] >> >> When replying, please edit your Subject line so it is more specific >> than "Re: Contents of es-discuss digest..." >> Today's Topics: >> >> 1. Re: Has there ever been discussion around a python-like >> "with" syntax? (Michael J. Ryan) >> >> >> >> ---------- Forwarded message ---------- >> From: "Michael J. Ryan" <[email protected]> >> To: [email protected] >> Cc: [email protected], es-discuss <[email protected]> >> Bcc: >> Date: Wed, 17 Oct 2018 13:19:17 -0700 >> Subject: Re: Has there ever been discussion around a python-like "with" >> syntax? >> I was going to mention C#'s using statement as well... though I do like >> the use of a symbol over Ron's proposal, I think using might be a better >> approach. >> >> -- >> Michael J. Ryan >> 480-270-4509 <(480)%20270-4509> >> https://www.tracker1.info/ >> [email protected] >> [email protected] >> >> >> On Mon, Oct 15, 2018 at 11:50 AM Till Schneidereit < >> [email protected]> wrote: >> >>> Ron Buckton has a proposal that's quite similar to what you're talking >>> about: https://github.com/tc39/proposal-using-statement >>> >>> On Mon, Oct 15, 2018 at 11:40 AM Dan Aprahamian < >>> [email protected]> wrote: >>> >>>> Hello all! First time posting here. I was curious if there was ever >>>> talk about adding something similar to python's with syntax to JS. >>>> Obviously we already have a "with" keyword, but I figure we could probably >>>> use "use" as the keyword instead. I was thinking something like >>>> >>>> // Some user defined resource that can be "entered" and "exited" >>>> class MyResource { >>>> // Function called when entered >>>> async [Symbol.enter]() { >>>> } >>>> >>>> // Function called when exited >>>> [Symbol.exit]() { >>>> } >>>> } >>>> >>>> const resource = new MyResource(); >>>> >>>> async function useResource() { >>>> use myResource { >>>> // Inside here, resource has had "acquire" called on it >>>> >>>> await doSomethingAsync(); >>>> // Once this block is finished executing (including async) >>>> // release is called >>>> } >>>> // Release has been called now >>>> } >>>> >>>> Use would effectively be the equivalent of: >>>> >>>> async function use(resource, body) { >>>> await resource[Symbol.enter](); >>>> try { >>>> await body(); >>>> } finally { >>>> await resource[Symbol.exit](); >>>> } >>>> } >>>> >>>> Has something like this been considered before? >>>> >>>> Thanks, >>>> Dan >>>> _______________________________________________ >>>> es-discuss mailing list >>>> [email protected] >>>> https://mail.mozilla.org/listinfo/es-discuss >>>> >>> _______________________________________________ >>> es-discuss mailing list >>> [email protected] >>> https://mail.mozilla.org/listinfo/es-discuss >>> >> _______________________________________________ >> es-discuss mailing list >> [email protected] >> https://mail.mozilla.org/listinfo/es-discuss >> > _______________________________________________ > es-discuss mailing list > [email protected] > https://mail.mozilla.org/listinfo/es-discuss >
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