- From: Boris Zbarsky <bzbarsky@mit.edu>
- Date: Thu, 11 Sep 2014 22:03:50 -0400
- To: public-script-coord@w3.org
On 11/18/13, 12:59 PM, Boris Zbarsky wrote: > My current plan in WebIDL is to spec sequence<> as follows, with the > incoming value as "val": > > 1) If val is not an object, move on to the next union member (or throw > an exception if none left). This allows a union of sequence and > string, and is the current behavior of sequences anyway. > 2) Do iter = Get(val, @@iterator). ReturnIfAbrupt. > 3) If the value is not an object or is not callable, move on to the > next union member. > 4) Commit to treating this as a sequence. > 5) iterator = iter.call(val); > 6) Walk through with IteratorStep/IteratorValue etc, converting each > sequence element before stepping to the next one. Following up on this: per more recent discussion, I'm going to make this more like Array.from instead. So replace step 3 with "If the value is undefined, move on to the next union member". -Boris
Received on Friday, 12 September 2014 02:04:16 UTC