(title)  class X::NYI 

    class X::NYI is Exception { }

 

Error class for unimplemented features. I<NYI> stands for I<Not Yet Implemented>. If a Perl 6 compiler is not yet feature complete, it may throw an X::NYI exception when a program uses a feature that it can detect is not yet implemented. A full-featured Perl 6 compiler must not throw such exceptions, but still provide the X::NYI class for compatiblity reasons. A typical error message is

    HyperWhatever is not yet implemented. Sorry.

 

(head2)  features 

Returns a Str describing the missing feature.