Is there a missing step in that outlined algorithm? Where is [[Prototype]] set?
So roughly speaking, Foo.[[Constructor]](...args) would be defined as: 1) Let creator be Foo.[[Get]](@@create) 2 ) Let newObj be creator.call(foo). //Foo is passed as the this value to @@create 2.5) Call newObj.[[SetInheritance]](Foo.prototype) 3) Let ctorResult be Foo.[[call]](newObj,args) 4) If Type(ctorResult) is Object, return ctorResult 5) else return newObj On Mon, Dec 3, 2012 at 6:52 PM, Allen Wirfs-Brock <[email protected]>wrote: > > On Dec 3, 2012, at 3:03 PM, Jason Orendorff wrote: > > On Sat, Dec 1, 2012 at 2:38 PM, Allen Wirfs-Brock > <[email protected]>wrote: > >> The simplification I've thought about is eliminating [[Construct]] as an >> internal method/Proxy trap and just making the call @@Create/call >> consturctor sequence the evaluation semantics of the new operator. But >> I've not yet convinced myself that this is sufficient to capture all of the >> "called as constructor"/"called as a function" semantic silliness that some >> chapter 15 built-ins have. I'm also not sure that DOM and friends don't >> have other dependencies on a reified [[Construt]] >> > > The simplification I had in mind was changing [[Construct]] from an > internal method/Proxy trap to an ordinary .@@construct method. There would > be a @@construct/constructor split rather than a > [[Construct]]/@@create/constructor split. > > But on reflection, it didn't seem like that would be simpler in practice. > Having two separately hookable phases of object construction is just right. > A class can easily customize either behavior in a way that not only works, > but will still work when the class is subclassed further. > > -j > > > OK, so it sounds like we have a plan. I'll update the spec. to use > @@create. > > Allen > > _______________________________________________ > es-discuss mailing list > [email protected] > https://mail.mozilla.org/listinfo/es-discuss > > -- erik
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