Class: Roby::DelayedArgumentFromState

Inherits:
DelayedArgumentFromObject show all
Defined in:
lib/roby/task_arguments.rb

Overview

Placeholder that can be used to assign an argument from a state value, reading the attribute only when the task is started

This will usually not be used directly. One should use Task.from_state instead

It differs from DelayedArgumentFromObject as it always filters out unassigned state values

Instance Method Summary collapse

Methods inherited from DelayedArgumentFromObject

#==, #method_missing, #of_type, #pretty_print, #to_s

Methods included from Roby::DRoby::V5::Builtins::ClassDumper

#droby_dump

Methods included from Roby::DRoby::V5::DelayedArgumentFromObjectDumper

#droby_dump

Constructor Details

#initialize(state_object = State, weak = true) ⇒ DelayedArgumentFromState

Returns a new instance of DelayedArgumentFromState.



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# File 'lib/roby/task_arguments.rb', line 367

def initialize(state_object = State, weak = true)
    super(state_object, weak)
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method in the class Roby::DelayedArgumentFromObject

Instance Method Details

#evaluate_delayed_argument(task) ⇒ Object 



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# File 'lib/roby/task_arguments.rb', line 371

def evaluate_delayed_argument(task)
    result = super
    if result.kind_of?(OpenStruct) && !result.attached?
        throw :no_value
    end
    result
end