cpp/ranges/view interface/operator bool

The default implementation of member function checks whether the view is non-empty. It makes the derived type contextually convertible to.

@1@ Let be. The expression in the requires-clause is equal to, and the function body is equivalent to.

@2@ Same as, except that is.

Parameters
(none)

Return value
if the value of the derived type is empty (determined by ranges), otherwise.