X::Promise::CauseOnlyValidOnBroken Reference

Error due to asking why an unbroken promise has been broken.

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 promise #

method promise()

Returns the Promise that was asked about.

method status #

method status()

Returns the status the Promise had at that time.

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

class X::Promise::CauseOnlyValidOnBroken is Exception { }