Class: Mapleseed::Ring

Inherits:
Object
  • Object
show all
Defined in:
lib/mapleseed/ring.rb

Overview

base class for whirl command rings

Direct Known Subclasses

MathRing, OpRing

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(interpreter) ⇒ Ring

initialize the ring



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# File 'lib/mapleseed/ring.rb', line 8

def initialize(interpreter)
  @position = 0
  @value = 0
  @direction = 1
  @commands = []
  @interpreter = interpreter
end

Instance Attribute Details

#commands ⇒ Object (readonly)

Returns the value of attribute commands.



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# File 'lib/mapleseed/ring.rb', line 5

def commands
  @commands
end

#direction ⇒ Object (readonly)

Returns the value of attribute direction.



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# File 'lib/mapleseed/ring.rb', line 5

def direction
  @direction
end

#position ⇒ Object (readonly)

Returns the value of attribute position.



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# File 'lib/mapleseed/ring.rb', line 5

def position
  @position
end

#value ⇒ Object (readonly)

Returns the value of attribute value.



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# File 'lib/mapleseed/ring.rb', line 5

def value
  @value
end

Instance Method Details

#execute ⇒ Object 



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# File 'lib/mapleseed/ring.rb', line 31

def execute
  if @position < @commands.length
    send @commands[@position]
  end
end

#rotate ⇒ Object

rotate the ring in the given direction



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# File 'lib/mapleseed/ring.rb', line 22

def rotate
  @position += @direction
  if @position == @commands.length
    @position = 0
  elsif @position == -1
    @position = @commands.length - 1
  end
end

#switch_direction ⇒ Object

change the direction of the ring



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# File 'lib/mapleseed/ring.rb', line 17

def switch_direction
  @direction *= -1
end