25391 – Add default to a sequence e.g. sequence<DOMString> = [];

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Bug 25391 - Add default to a sequence e.g. sequence<DOMString> = [];

Summary: Add default to a sequence e.g. sequence<DOMString> = [];

Status:	RESOLVED FIXED

Alias:	None

Product:	WebAppsWG
Classification:	Unclassified
Component:	WebIDL (show other bugs)
Version:	unspecified
Hardware:	PC All

Importance:	P2 normal
Target Milestone:	---
Assignee:	Cameron McCormack
QA Contact:	public-webapps-bugzilla

URL:
Whiteboard:
Keywords:

Depends on:
Blocks:

Reported:	2014-04-18 20:55 UTC by Jan-Ivar Bruaroey [:jib]
Modified:	2014-06-16 19:04 UTC (History)
CC List:	3 users (show)

See Also:

Attachments

Description Jan-Ivar Bruaroey [:jib] 2014-04-18 20:55:57 UTC

Sometimes knowing the difference between someone passing in an empty sequence versus nothing is useful, but at other times an invariant that didn't care would be better.

In the latter case, the Optional<>::WasPassed() and Optional<>::Value() bindings get in the way when assuming an empty array would make for simpler code.

Comment 1 Cameron McCormack 2014-06-16 06:03:35 UTC

Thanks, I've added this now:

https://github.com/heycam/webidl/commit/b0c3626a97de27578508aa7a3f52c1b30f26d2bf

Comment 2 Boris Zbarsky 2014-06-16 19:01:44 UTC

Shouldn't we only allow [] for nullable sequence types, not all nullable types?

But also, we should allow it for unions containing sequence, imo.

Comment 3 Boris Zbarsky 2014-06-16 19:04:06 UTC

Also, "The type of this value is the same the type" is missing an "as".