Re: Clarification on exceptions

make sense.

On Fri, Feb 11, 2011 at 6:39 PM, Steve Block <steveblock@google.com> wrote:

> I think that the spec does implicitly specify a behavior, since Web
> IDL specifies the conversion between an ECMAScript value and an IDL
> type.
>
> For example, for the PositionCallback argument, Web IDL states that if
> an argument is passed that does not implement the interface, a
> TypeError should be thrown -
> http://dev.w3.org/2006/webapi/WebIDL/#es-interface.
>
> A complication is in the handling of a null value for the
> PositionCallback argument. I think that a null ECMAScript value is
> successfully converted to an IDL interface of value null -
> http://dev.w3.org/2006/webapi/WebIDL/#idl-interface. The Geolocation
> spec states that we should then abort the operation on receipt of a
> null value.
>
> This does not match the behavior of the current implementations, which
> throw an exception if a null value is passed. We should probably
> consider updating the spec to reflect this behavior.
>
> Steve
>
> --
> Google UK Limited
> Registered Office: Belgrave House, 76 Buckingham Palace Road, London SW1W
> 9TQ
> Registered in England Number: 3977902
>