On Apr 21, 2009, at 1:38 AM, Anne van Kesteren wrote:
If something takes a DOMString as value is it clearly defined what
happens if the toString algorithm throws or returns a non-DOMString?
I haven't been able to find descriptions for that in the Web IDL
specification. E.g.
obj = { toString:function() { throw("haha") } }
obj2 = { toString:function() { return 1 } }
obj3 = { toString:function() { return obj } }
The [[ToString]] algorithm is defined in ECMAScript (Section 9.8,
[1]), the specified behaviour would result in [[ToString]] on obj2
producing the string "1"; [[ToString]] on obj3 will result in a
TypeError, as [[DefaultValue]] will produce a non-primitive type
(Section 9.1, [1])
I would assume that the exception will be propagated to the runtime,
but it should be stated.
--Oliver
[1] ECMA262-5 RC
http://www.ecma-international.org/publications/files/drafts/tc39-2009-025.pdf
--
Anne van Kesteren
http://annevankesteren.nl/
