Class: CSP::Constraint

Inherits:
Object
  • Object
show all
Defined in:
lib/csp/constraint.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(variables = []) ⇒ Constraint

Returns a new instance of Constraint.



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# File 'lib/csp/constraint.rb', line 7

def initialize(variables = [])
  @variables = variables
end

Instance Attribute Details

#variables ⇒ Object (readonly)

Returns the value of attribute variables.



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# File 'lib/csp/constraint.rb', line 5

def variables
  @variables
end

Instance Method Details

#arity ⇒ Object 



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# File 'lib/csp/constraint.rb', line 23

def arity
  @arity ||= variables.size
end

#binary? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/csp/constraint.rb', line 19

def binary?
  arity == 2
end

#satisfies?(_assignment = {}) ⇒ Boolean

Returns:

  • (Boolean)

Raises:

  • (StandardError) 


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# File 'lib/csp/constraint.rb', line 11

def satisfies?(_assignment = {})
  raise StandardError, 'Not Implemented. Should return a boolean'
end

#unary? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/csp/constraint.rb', line 15

def unary?
  arity == 1
end