> The idea to develop in native way a good templating engine is exciting and I'm looking forward for its complete implementation :)
This topic arose in an earlier thread that I'm too lazy to track down. Some insane person from Microsoft? actually showed us how to write ifs and everything using horribly nested template strings. Bottom line, template strings, with or without `do`, which is both unnecessary and would break everything, are not a good starting point for writing a templating engine. I'd definitely take a different approach. Bob On Mon, Jan 11, 2016 at 6:06 PM, Caitlin Potter <[email protected]> wrote: > > Watch your precedence, Caitlin. You'll need to wrap that arrow in > parentheses like so: > > Yes, I guess arrow functions aren’t a PrimaryExpression — doesn’t really > matter, though > > On Jan 10, 2016, at 11:58 PM, Michael Ficarra <[email protected]> > wrote: > > Watch your precedence, Caitlin. You'll need to wrap that arrow in > parentheses like so: > > ```js > `Hello ${(_ => { > if (a == 2) { > console.log(‘world’); > } > })()}`; > ``` > > Michael > > On Sun, Jan 10, 2016 at 7:12 PM, Caitlin Potter <[email protected]> > wrote: > >> Do-Expressions are still floating around Stage 0, there’s no guarantee >> that they will be incorporated into the language. >> >> The feature is implemented in v8 behind a flag, and can be used in Chrome >> Canary by launching the browser with `—js-flags=“—harmony-do-expressions”`, >> which would enable you to try it out. >> >> **INTERMISSION — Slightly more on-topic portion of post follows after a >> short coffee break** >> >> However, to answer your question, you can implement an >> immediately-invoked-function-expression, like this: >> >> ```js >> `Hello ${_ => { >> if (a == 2) { >> console.log(‘world’); >> } >> }()}`; >> ``` >> >> So this wouldn’t depend on the Do-Expressions proposal, and wouldn’t >> require a keyword per se, although you’d still have some extra tokens >> making things a bit harder to read. >> >> It’s unlikely that the grammar would be changed to accommodate this use >> case, given that people are using template literals already, and the >> use-case is already supported by other means. >> >> On Jan 10, 2016, at 9:23 PM, Manuel Di Iorio <[email protected]> wrote: >> >> Hi, I asked around and somebody said that there will be the possibility >> to execute arbitrary code inside the template tags, using the *'do'* >> keyword in this example way: >> >> `Hello ${ do if (a == 2) { >>> console.log(' world'); >>> } }` >> >> >> Is there the possibility in future to implement that feature without the >> keyword? >> What is the plan *(read 'estimated date')* for the rollout of this >> feature ? >> >> The idea to develop in native way a good templating engine is exciting >> and I'm looking forward for its complete implementation :) >> _______________________________________________ >> 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 >> >> > > > -- > Shape Security is hiring outstanding individuals. Check us out at > *https://shapesecurity.com/jobs/ > <https://shapesecurity.com/jobs/>* > > > > _______________________________________________ > es-discuss mailing list > [email protected] > https://mail.mozilla.org/listinfo/es-discuss > >
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