On 3/4/14 7:31 PM, Robert O'Callahan wrote:
Even when you just need instanceof, can it be shortened to
if (HTMLTitleElement::hasInstance(element))
?
Note that in Gecko that instanceof check would be:
element->IsHTML(nsGkAtoms::title)
While there are more longhand ways to decompose the checks that's
performing for callers who already know they have an HTML element and
think they're peformance-sensitive, there is also great value in having
it be very clear exactly what's being checked in the common case. If we
could have written:
element->IsHTMLTitle()
without having to handcode a bunch of little methods, we would have done
that too, in Gecko.
We do in fact have a numberof HTMLFooElement::FromContent() methods in
Gecko that return a HTMLFooElement* (possibly null if the thing passed
in wasn't an actual HTMLFooElement).
-Boris
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