On Mon, 21 Jul 2014, Allen Wirfs-Brock wrote: > On Jul 21, 2014, at 11:23 AM, Ian Hickson wrote: > > > > 8.5 Initialization step 4 says "Push newContext onto the execution > > context stack", and step 8 calls NextTask. 8.4.2 NextTask suspends the > > running execution context in step 2, then in step 3 asserts "The > > execution context stack is now empty". However, I can't find anything > > in the prose around suspension that actually pops the execution > > context stack. Am I missing something? > > A job (task in the version you're looking at)
Is there a more up to date version I can look at? I couldn't quite work out what the canonical file to look at was. I've been using this: http://people.mozilla.org/~jorendorff/es6-draft.html > is always initialized (by NextJob) with an empty execution context > stack. What step in NextJob does this? It seems that step 3 asserts it, but step 1 doesn't seem to affect the stack, and step 2 refers to the "suspend" prose, which seems mostly non-normative (I can't quite tell it's normative status -- there's no step-by-step algorithms, which seems to be the way the ES spec indications normativity, but there's no RFC2119-style prose either, so I can't tell the descriptive statements in that section from the prescriptive ones). > NextJob creates a root execution context and then transfers control (a > goto, not a call) As phrased it's more like a tail-call, but the three are black-box indistinguishable at the spec level, so that's somewhat academic. > [...] We are essentially faking up an initial current job state that > NextJob can switch out of when scheduling the first real job. I guess what I'm saying is that it's not clear to me where the "switch out" step happens. Do you have a pointer? -- Ian Hickson U+1047E )\._.,--....,'``. fL http://ln.hixie.ch/ U+263A /, _.. \ _\ ;`._ ,. Things that are impossible just take longer. `._.-(,_..'--(,_..'`-.;.' _______________________________________________ es-discuss mailing list [email protected] https://mail.mozilla.org/listinfo/es-discuss
