Re: [heycam/webidl] Add async_iterable support (#720)

domenic commented on this pull request.



> +being iterated over asynchronously to obtain a sequence of values.
+
+Note: In the ECMAScript language binding, an interface that is asynchronously iterable will have
+<code class="idl">entries</code>, <code class="idl">keys</code>, <code class="idl">values</code>,
+and {{@@asyncIterator}} properties on its [=interface prototype object=].
+
+Prose accompanying an [=interface=] with an [=asynchronously iterable declaration=] must define a
+<dfn id="dfn-get-the-next-iteration-result">get the next iteration result</dfn> algorithm.
+This algorithm receives a <b>[=this=]</b> value, which is an instance of the [=interface=] that it
+is defined for, and the <dfn export>current state</dfn>.
+It must return a {{Promise}} that either resolves with undefined – to signal the end of the
+iteration – or a tuple with three elements:
+
+1.  a value of the first type given in the declaration;
+1.  a value of the second type given in the declaration;
+1.  an opaque value that is passed back to the next invocation of the algorithm,

Let's stick with what you've got. Mixing yield/throw and promises is too weird, indeed.

-- 
You are receiving this because you are subscribed to this thread.
Reply to this email directly or view it on GitHub:
https://github.com/heycam/webidl/pull/720#discussion_r286167523