Rules / Types, classes & roles / exception

X::Parameter::WrongOrder Reference

Compilation error due to passing parameters in the wrong order

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 misplaced #

Returns the kind of misplaced parameter (for example "mandatory", "positional").

method parameter #

Returns the name of the (first) misplaced parameter

method after #

Returns a string describing other parameters after which the current parameter was illegally placed (for example "variadic", "positional" or "optional").

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.

3 no-output

class X::Parameter::WrongOrder does X::Comp { }

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

sub f($a?, $b) { }

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

Cannot put required parameter $b after optional parameters

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