NAME

Class::Workflow::Transition::Deterministic - A transition which knows which state it leads to.

SYNOPSIS

        package MyTransition;
        use Moose;

        with qw/
                Class::Workflow::Transition
                Class::Workflow::Deterministic
        /;

        sub apply_body { # instead of 'sub apply'
                # body
        }

        # this may be changed to the following form in the future:
        augment apply => sub {
                # body
        };

DESCRIPTION

This role provides a base role for transitions which know their target state.

It overrides "apply" with a default implementation that will derive an instance for you, setting "state" automatically, appending the return value from "apply_body" to that list.

You should consume this role unless you need to determine the target state dynamically (probably not a good idea).

FIELDS

to_state: The target state of the transition. Should do Class::Workflow::State.

METHODS

apply: In scalar context returns the derived instance, in list caller also returns the remaining return value from "apply_body".

REQUIRED METHODS

apply_body

The "inner" body of the function.

This method is always evaluated in list context, and is expected to return a hash reference of overridden fields as the first value in that list.

In the future instead of defining "apply_body" you will do:

        augment apply => sub {
                # body
        };

And this role's "apply" will really use "inner()".