Accord.Fuzzy.Rule.EvaluateFiringStrength C# (CSharp) Method

        public float EvaluateFiringStrength( )
        {
            // Stack to store the operand values
            Stack<float> s = new Stack<float>( );

            // Logic to calculate the firing strength
            foreach ( object o in rpnTokenList )
            {
                // if its a clause, then its value must be calculated and pushed
                if ( o.GetType( ) == typeof( Clause ) )
                {
                    Clause c = o as Clause;
                    s.Push( c.Evaluate( ) );
                }
                // if its an operator (AND / OR) the operation is performed and the result 
                // returns to the stack
                else
                {
                    float y = s.Pop( );
                    float x = 0;

                    // unary pops only one value
                    if ( unaryOperators.IndexOf( o.ToString( ) ) < 0 )
                        x = s.Pop( );

                    // operation
                    switch ( o.ToString( ) )
                    {
                        case "AND":
                            s.Push( normOperator.Evaluate( x, y ) );
                            break;
                        case "OR":
                            s.Push( conormOperator.Evaluate( x, y ) );
                            break;
                        case "NOT":
                            s.Push( notOperator.Evaluate( y ) );
                            break;
                    }
                }
            }

            // result on the top of stack
            return s.Pop( );
        }
    }