Rules / Types, classes & roles / exception

X::Method::InvalidQualifier Reference

Error due to calling a qualified method from an ineligible class

What it is #

Routines #

Signatures are reproduced from the documentation, including their declared return types. A routine listed here is part of the type's published interface; whether Raku++ implements it is a separate question, answered by the examples below.

method method #

method method(--> Str:D)

Returns Str:D.

Returns the name of the (unqualified) method.

method invocant #

Returns the invocant of the failed, qualified method call

method qualifier-type #

Returns the type by which the method call was qualified.

Examples, run three ways #

Every example below comes from the official documentation, together with the output that documentation asserts. Each was then executed by Rakudo and by Raku++ when this page was built. Where the three agree, one result is shown; where they do not, all three are — because which of them is wrong is exactly the information worth having.

1 no-output · 1 rakupp-differs

class X::Method::InvalidQualifier is Exception { }

Not executed: the documentation states no expected output for this example.

1.Str::split(/a/);
CATCH { default { put .^name, ': ', .Str } };
# OUTPUT: «X::Method::InvalidQualifier: Cannot dispatch to method split on Str because it is not inherited or done by Int␤»
Documentation
X::Method::InvalidQualifier: Cannot dispatch to method split on Str because it is not inherited or done by Int
Rakudo
X::Method::InvalidQualifier: Cannot dispatch to method split on Str because it is not inherited or done by Int
Raku++

Raku++ disagrees with both the documentation and Rakudo — a defect.