Although the method lives on the prototype, the engine should already have knowledge of the object whose method is being invoked. I am not an expert on the internal workings of the engine, so I would be glad if anyone would correct me on this if I am wrong.
<https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=icon> Virus-free. www.avast.com <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=link> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> On Sun, Mar 10, 2019 at 12:27 AM Jordan Harband <[email protected]> wrote: > An additional keyword like this would require a function to have a hidden > reference back to the instance. However, especially for `class` methods, > but also for ES5-style inheritance, or even for `class Foo {} > Foo.prototype.bar = function () {}`, methods are *shared*. You might have a > billion instances, but only one function that uses your new keyword - how > would the engine know which instance you were referring to? > > On Sat, Mar 9, 2019 at 7:50 AM Bergi <[email protected]> wrote: > >> Hi John, >> >> > I believe that it would be a trivial task for >> > current static code analyzers to restrict usage of "this" for anyone >> > opting in to use this new keyword exclusively. >> >> Static tooling, like the TypeScript compiler, can detect problematic >> method usage already today. Sure, having a dedicated syntax for this >> will make static analysis simpler, but I don't deem that a worthy >> addition to the language. >> >> > As you mentioned, arrow functions might have their own >> > problems. Wouldn't such an alternative keyword be a good addition to our >> > toolkit anyway? >> >> What I was trying to say is that your proposed alternative has exactly >> the same problems as instance-member arrow functions have today. >> >> Best regards, >> Bergi >> _______________________________________________ >> 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
