David Abrahams wrote:

"Reece Dunn" <msclrhd@hotmail.com> writes:

...

Drawing influence from Python, I suggest that the non-throwing version look like:

std::pair<T,bool> string_to<T>(x)

allowing:

fn( string_to<Object>(object).first );

How does that draw influence from Python?

I was refering to multiple-valued returns. For example: def string_to( object ): return object, was_there_an_error obj, err = string_to( ... )

That interface doesn't allow for types that can't be default constructed.

optional<T> string_to<T>(x)

seems more likely.

That does look better. So in that case, an error would be indicated by the optional<T> return containing null. - Reece _________________________________________________________________ Express yourself instantly with MSN Messenger! Download today it's FREE! http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/