class X::Obsolete does X::Comp { }

Syntax error thrown when the user is attempting to use constructs from other languages.

For example


dies with

Unsupported use of /iin Raku please use :i


method old

method old(--> Str:D)

Returns a textual description of the obsolete syntax construct

method replacement

method replacement(--> Str:D)

Describes what to use instead of the obsolete syntax.

method when

method when(--> Str:D)

Returns a string describing the state of the language (usually " in Raku").