Scheduler Reference

Scheme for automatically assigning tasks to threads

What it is #

Position in the hierarchy #

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 uncaught_handler #

method uncaught_handler() is rw

RW-Accessor for the handler that is caught for uncaught exceptions from the code that is being scheduled and run.

method cue #

method cue(&code, Instant :$at, :$in, :$every, :$times = 1; :&catch --> Cancellation)

Returns Cancellation.

Schedules a callable (&code) for execution and returns an instantiated Cancellation object to cancel the scheduling of the code for execution (which is especially important if you specify the :every ( time ) named parameter). The adverbs control when and how the code is run: run. Alternatively $in is the number of seconds (possibly fractional) to wait before running the code. If $at is in the past or $in is negative,

method loads #

method loads()

This is a method stub, should be re-implemented when subclassing.

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

role Scheduler {
    has &.uncaught_handler is rw
}