293546 - No way to do "a instanceof b" using the JS API.

Status: RESOLVED FIXED

(Core :: JavaScript Engine, defect)

Description

[Johnny Stenback (:jst)]

I've got two objects and I want to find out if one's an instance of the other.
There's a JSClass hook that helps you implement this for your own classes, but
there's no JS engine API to do that check.

Comment 1

[Mike Shaver (:shaver -- probably not reading bugmail closely)]

Attachment: the obvious, trivial patch

Comme ca?  It wants a doc-comment explaining that it is the equivalent of the
language |instanceof| construct, albeit with reversed operands, and that
JS_InstanceOf trades in native classes only.  We don't always get what we want,
though.

Comment 2

[Brendan Eich [:brendan]]

Comment on attachment 183102 [details] [diff] [review]
the obvious, trivial patch

r/sr/a=me.  No doc comment, instead add to js/docs/jsref.xml.

/be

Comment 3

[Johnny Stenback (:jst)]

Oh, and this does indeed do exactly what I wanted. Thanks for the quick fix!

Comment 4

[Johnny Stenback (:jst)]

This was already checked in. Marking FIXED.