Method: Predicate::NadicBool#free_variables

Defined in:
lib/predicate/nodes/nadic_bool.rb

#free_variables ⇒ Object 



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# File 'lib/predicate/nodes/nadic_bool.rb', line 9

def free_variables
  @free_variables ||= sexpr_body.inject([]){|list,term| 
    list | term.free_variables
  }
end