[webkit-dev] JSObjectMakeFunction question
mjs at apple.com
Mon Jun 1 08:56:32 PDT 2009
On Jun 1, 2009, at 8:29 AM, Jack Wootton wrote:
> It seems some casting is required for this though?
> JSValueRef JSObjectCallAsFunction(
> The above function accepts a JSObjectRef object.
> JSValueRef JSObjectGetProperty(
> returns JSValueRef
Setting aside the actual typedefs (which are our attempt to trick the
are not objects. So every object is a kind of value, but not all
values are objects.
JSObjectGetProperty retrieves a property from an object, and it can't
guarantee whether the result will be an object or a primitive, so it
returns JSValueRef. If you can be certain the value is in fact an
object (functions are a kind of object), you can just downcast. If you
are not certain (for example the property can be defined or altered by
script), you can use JSValueIsObject to check before casting.
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