/// <summary>
        /// 逆ポーランド記法で表現された終端記号から、品詞を作成する。
        /// </summary>
        /// <param name="rPolish">終端記号の逆ポーランド記法表現</param>
        /// <returns>品詞。ただし、演算子の括弧深さは0とする。</returns>
        public static Lexical createFromRPolish(string rPolish)
        {
            switch (rPolish)
            {
            case "+":
                return(new BinaryOperatorAdd());

            case "--":
                return(new BinaryOperatorDiff());

            case "*":
                return(new BinaryOperatorProd());

            case "/":
                return(new BinaryOperatorDivide());

            case "%":
                return(new BinaryOperatorMod());

            case "^":
                return(new BinaryOperatorPow());

            case "-":
                return(new UnaryOperatorNegative());

            case "<":
                return(new BinaryOperatorLt());

            case "<=":
                return(new BinaryOperatorLtEq());

            case ">":
                return(new BinaryOperatorGt());

            case ">=":
                return(new BinaryOperatorGtEq());

            case "==":
                return(new BinaryOperatorEqual());

            case "!=":
                return(new BinaryOperatorNotEqual());

            case "!":
                return(new UnaryOperatorNot());

            case "&&":
                return(new BinaryOperatorAnd());

            case "||":
                return(new BinaryOperatorOr());

            case ",":
                return(new BinaryOperatorComma());

            case "true":
                var literalTrue = new LiteralTrue();
                literalTrue.value = "true";
                return(literalTrue);

            case "false":
                var literalFalse = new LiteralFalse();
                literalFalse.value = "false";
                return(literalFalse);
            }
            if (rPolish.StartsWith("Int"))
            {
                //Int[value]の余計な文字「Int[」と「]」を取り除く。
                string value          = rPolish.Substring(4, rPolish.Length - 5);
                var    literalInteger = new LiteralInteger();
                literalInteger.value = value;
                return(literalInteger);
            }
            else if (rPolish.StartsWith("Dec"))
            {
                //Dec[value]の余計な文字「Dec[」と「]」を取り除く。
                string value          = rPolish.Substring(4, rPolish.Length - 5);
                var    literalDecimal = new LiteralDecimal();
                literalDecimal.value = value;
                return(literalDecimal);
            }
            else if (rPolish.StartsWith("Var"))
            {
                //Var[value]の余計な文字「Var[」と「]」を取り除く。
                string value           = rPolish.Substring(4, rPolish.Length - 5);
                var    literalVariable = new LiteralVariable();
                literalVariable.value = value;
                return(literalVariable);
            }
            else if (rPolish.StartsWith("Func"))
            {
                //Func[value]の余計な文字「Func[」と「]」を取り除く。
                string value = rPolish.Substring(5, rPolish.Length - 6);
                var    unaryOperatorFunction = new UnaryOperatorFunction();
                unaryOperatorFunction.functionName = value;
                return(unaryOperatorFunction);
            }
            else
            {
                throw new ArgumentException("逆ポーランド記法表現で対応する品詞がありません。");
            }
        }
        public void TestMethodUnaryOperatorFunction()
        {
            var functionDataTypeMap = new Dictionary <string, DataType>();

            functionDataTypeMap.Add("testFunction1", DataType.Boolean);
            functionDataTypeMap.Add("testFunction2", DataType.Boolean);
            functionDataTypeMap.Add("testFunction3", DataType.Boolean);
            functionDataTypeMap.Add("testFunction4", DataType.Integer);
            functionDataTypeMap.Add("testFunction5", DataType.Integer);
            functionDataTypeMap.Add("testFunction6", DataType.Integer);
            functionDataTypeMap.Add("testFunction7", DataType.Decimal);
            functionDataTypeMap.Add("testFunction8", DataType.Decimal);
            functionDataTypeMap.Add("testFunction9", DataType.Decimal);
            var functionMap = new Dictionary <string, Function>();

            functionMap.Add("testFunction1", new Function(this.testFunction1));
            functionMap.Add("testFunction2", new Function(this.testFunction2));
            functionMap.Add("testFunction3", new Function(this.testFunction3));
            functionMap.Add("testFunction4", new Function(this.testFunction4));
            functionMap.Add("testFunction5", new Function(this.testFunction5));
            functionMap.Add("testFunction6", new Function(this.testFunction6));
            functionMap.Add("testFunction7", new Function(this.testFunction7));
            functionMap.Add("testFunction8", new Function(this.testFunction8));
            functionMap.Add("testFunction9", new Function(this.testFunction9));

            var unaryOperatorFunction = new UnaryOperatorFunction();

            Assert.AreEqual(9, unaryOperatorFunction.getPriority());

            unaryOperatorFunction.functionName = "testFunction1";
            Assert.AreEqual("Func[testFunction1]", unaryOperatorFunction.getRPolish());
            Assert.AreEqual(DataType.None, unaryOperatorFunction.getDataType(DataType.Boolean, functionDataTypeMap));
            Assert.AreEqual(DataType.Boolean, unaryOperatorFunction.getDataType(DataType.Integer, functionDataTypeMap));
            Assert.AreEqual(DataType.Boolean, unaryOperatorFunction.getDataType(DataType.Decimal, functionDataTypeMap));
            Assert.AreEqual(DataType.Boolean, unaryOperatorFunction.getDataType(DataType.DecimalList, functionDataTypeMap));
            try
            {
                unaryOperatorFunction.eval(new MathTreeNodeValue(true), functionMap);
                Assert.Fail();
            }
            catch (Exception e)
            {
                Assert.IsTrue(e.GetType() == typeof(ArgumentException));
            }
            UnitTestUtil.AssertMathTreeNodeValue(true, unaryOperatorFunction.eval(new MathTreeNodeValue(12345), functionMap));
            UnitTestUtil.AssertMathTreeNodeValue(false, unaryOperatorFunction.eval(new MathTreeNodeValue(-123.45), functionMap));
            UnitTestUtil.AssertMathTreeNodeValue(true, unaryOperatorFunction.eval(new MathTreeNodeValue(new List <double>()
            {
                1, 2, 3, 4
            }), functionMap));

            unaryOperatorFunction.functionName = "testFunction2";
            Assert.AreEqual("Func[testFunction2]", unaryOperatorFunction.getRPolish());
            Assert.AreEqual(DataType.None, unaryOperatorFunction.getDataType(DataType.Boolean, functionDataTypeMap));
            Assert.AreEqual(DataType.Boolean, unaryOperatorFunction.getDataType(DataType.Integer, functionDataTypeMap));
            Assert.AreEqual(DataType.Boolean, unaryOperatorFunction.getDataType(DataType.Decimal, functionDataTypeMap));
            Assert.AreEqual(DataType.Boolean, unaryOperatorFunction.getDataType(DataType.DecimalList, functionDataTypeMap));
            try
            {
                unaryOperatorFunction.eval(new MathTreeNodeValue(true), functionMap);
                Assert.Fail();
            }
            catch (Exception e)
            {
                Assert.IsTrue(e.GetType() == typeof(ArgumentException));
            }
            try
            {
                unaryOperatorFunction.eval(new MathTreeNodeValue(12345), functionMap);
                Assert.Fail();
            }
            catch (Exception e)
            {
                Assert.IsTrue(e.GetType() == typeof(ArgumentOutOfRangeException));
            }
            try
            {
                unaryOperatorFunction.eval(new MathTreeNodeValue(-123.45), functionMap);
                Assert.Fail();
            }
            catch (Exception e)
            {
                Assert.IsTrue(e.GetType() == typeof(ArgumentOutOfRangeException));
            }
            UnitTestUtil.AssertMathTreeNodeValue(true, unaryOperatorFunction.eval(new MathTreeNodeValue(new List <double>()
            {
                1, 2, 3, 4
            }), functionMap));

            unaryOperatorFunction.functionName = "testFunction3";
            Assert.AreEqual("Func[testFunction3]", unaryOperatorFunction.getRPolish());
            Assert.AreEqual(DataType.None, unaryOperatorFunction.getDataType(DataType.Boolean, functionDataTypeMap));
            Assert.AreEqual(DataType.Boolean, unaryOperatorFunction.getDataType(DataType.Integer, functionDataTypeMap));
            Assert.AreEqual(DataType.Boolean, unaryOperatorFunction.getDataType(DataType.Decimal, functionDataTypeMap));
            Assert.AreEqual(DataType.Boolean, unaryOperatorFunction.getDataType(DataType.DecimalList, functionDataTypeMap));
            try
            {
                unaryOperatorFunction.eval(new MathTreeNodeValue(true), functionMap);
                Assert.Fail();
            }
            catch (Exception e)
            {
                Assert.IsTrue(e.GetType() == typeof(ArgumentException));
            }
            UnitTestUtil.AssertMathTreeNodeValue(true, unaryOperatorFunction.eval(new MathTreeNodeValue(12345), functionMap));
            UnitTestUtil.AssertMathTreeNodeValue(false, unaryOperatorFunction.eval(new MathTreeNodeValue(-123.45), functionMap));
            UnitTestUtil.AssertMathTreeNodeValue(true, unaryOperatorFunction.eval(new MathTreeNodeValue(new List <double>()
            {
                1, 2, 3, 4
            }), functionMap));

            unaryOperatorFunction.functionName = "testFunction4";
            Assert.AreEqual("Func[testFunction4]", unaryOperatorFunction.getRPolish());
            Assert.AreEqual(DataType.None, unaryOperatorFunction.getDataType(DataType.Boolean, functionDataTypeMap));
            Assert.AreEqual(DataType.Integer, unaryOperatorFunction.getDataType(DataType.Integer, functionDataTypeMap));
            Assert.AreEqual(DataType.Integer, unaryOperatorFunction.getDataType(DataType.Decimal, functionDataTypeMap));
            Assert.AreEqual(DataType.Integer, unaryOperatorFunction.getDataType(DataType.DecimalList, functionDataTypeMap));
            try
            {
                unaryOperatorFunction.eval(new MathTreeNodeValue(true), functionMap);
                Assert.Fail();
            }
            catch (Exception e)
            {
                Assert.IsTrue(e.GetType() == typeof(ArgumentException));
            }
            UnitTestUtil.AssertMathTreeNodeValue(12348, unaryOperatorFunction.eval(new MathTreeNodeValue(12345), functionMap));
            UnitTestUtil.AssertMathTreeNodeValue(-121, unaryOperatorFunction.eval(new MathTreeNodeValue(-123.45), functionMap));
            UnitTestUtil.AssertMathTreeNodeValue(4, unaryOperatorFunction.eval(new MathTreeNodeValue(new List <double>()
            {
                1, 2, 3, 4
            }), functionMap));

            unaryOperatorFunction.functionName = "testFunction5";
            Assert.AreEqual("Func[testFunction5]", unaryOperatorFunction.getRPolish());
            Assert.AreEqual(DataType.None, unaryOperatorFunction.getDataType(DataType.Boolean, functionDataTypeMap));
            Assert.AreEqual(DataType.Integer, unaryOperatorFunction.getDataType(DataType.Integer, functionDataTypeMap));
            Assert.AreEqual(DataType.Integer, unaryOperatorFunction.getDataType(DataType.Decimal, functionDataTypeMap));
            Assert.AreEqual(DataType.Integer, unaryOperatorFunction.getDataType(DataType.DecimalList, functionDataTypeMap));
            try
            {
                unaryOperatorFunction.eval(new MathTreeNodeValue(true), functionMap);
                Assert.Fail();
            }
            catch (Exception e)
            {
                Assert.IsTrue(e.GetType() == typeof(ArgumentException));
            }
            try
            {
                unaryOperatorFunction.eval(new MathTreeNodeValue(12345), functionMap);
                Assert.Fail();
            }
            catch (Exception e)
            {
                Assert.IsTrue(e.GetType() == typeof(ArgumentOutOfRangeException));
            }
            try
            {
                unaryOperatorFunction.eval(new MathTreeNodeValue(12345), functionMap);
                Assert.Fail();
            }
            catch (Exception e)
            {
                Assert.IsTrue(e.GetType() == typeof(ArgumentOutOfRangeException));
            }
            UnitTestUtil.AssertMathTreeNodeValue(3, unaryOperatorFunction.eval(new MathTreeNodeValue(new List <double>()
            {
                1, 2, 3, 4
            }), functionMap));

            unaryOperatorFunction.functionName = "testFunction6";
            Assert.AreEqual("Func[testFunction6]", unaryOperatorFunction.getRPolish());
            Assert.AreEqual(DataType.None, unaryOperatorFunction.getDataType(DataType.Boolean, functionDataTypeMap));
            Assert.AreEqual(DataType.Integer, unaryOperatorFunction.getDataType(DataType.Integer, functionDataTypeMap));
            Assert.AreEqual(DataType.Integer, unaryOperatorFunction.getDataType(DataType.Decimal, functionDataTypeMap));
            Assert.AreEqual(DataType.Integer, unaryOperatorFunction.getDataType(DataType.DecimalList, functionDataTypeMap));
            try
            {
                unaryOperatorFunction.eval(new MathTreeNodeValue(true), functionMap);
                Assert.Fail();
            }
            catch (Exception e)
            {
                Assert.IsTrue(e.GetType() == typeof(ArgumentException));
            }
            UnitTestUtil.AssertMathTreeNodeValue(12345, unaryOperatorFunction.eval(new MathTreeNodeValue(12345), functionMap));
            UnitTestUtil.AssertMathTreeNodeValue(-124, unaryOperatorFunction.eval(new MathTreeNodeValue(-123.45), functionMap));
            UnitTestUtil.AssertMathTreeNodeValue(10, unaryOperatorFunction.eval(new MathTreeNodeValue(new List <double>()
            {
                1, 2, 3, 4
            }), functionMap));

            unaryOperatorFunction.functionName = "testFunction7";
            Assert.AreEqual("Func[testFunction7]", unaryOperatorFunction.getRPolish());
            Assert.AreEqual(DataType.None, unaryOperatorFunction.getDataType(DataType.Boolean, functionDataTypeMap));
            Assert.AreEqual(DataType.Decimal, unaryOperatorFunction.getDataType(DataType.Integer, functionDataTypeMap));
            Assert.AreEqual(DataType.Decimal, unaryOperatorFunction.getDataType(DataType.Decimal, functionDataTypeMap));
            Assert.AreEqual(DataType.Decimal, unaryOperatorFunction.getDataType(DataType.DecimalList, functionDataTypeMap));
            try
            {
                unaryOperatorFunction.eval(new MathTreeNodeValue(true), functionMap);
                Assert.Fail();
            }
            catch (Exception e)
            {
                Assert.IsTrue(e.GetType() == typeof(ArgumentException));
            }
            UnitTestUtil.AssertMathTreeNodeValue(Math.Sqrt((double)12345), unaryOperatorFunction.eval(new MathTreeNodeValue(12345), functionMap));
            UnitTestUtil.AssertMathTreeNodeValue(Double.NaN, unaryOperatorFunction.eval(new MathTreeNodeValue(-123.45), functionMap));
            UnitTestUtil.AssertMathTreeNodeValue((double)1, unaryOperatorFunction.eval(new MathTreeNodeValue(new List <double>()
            {
                1, 2, 3, 4
            }), functionMap));

            unaryOperatorFunction.functionName = "testFunction8";
            Assert.AreEqual("Func[testFunction8]", unaryOperatorFunction.getRPolish());
            Assert.AreEqual(DataType.None, unaryOperatorFunction.getDataType(DataType.Boolean, functionDataTypeMap));
            Assert.AreEqual(DataType.Decimal, unaryOperatorFunction.getDataType(DataType.Integer, functionDataTypeMap));
            Assert.AreEqual(DataType.Decimal, unaryOperatorFunction.getDataType(DataType.Decimal, functionDataTypeMap));
            Assert.AreEqual(DataType.Decimal, unaryOperatorFunction.getDataType(DataType.DecimalList, functionDataTypeMap));
            try
            {
                unaryOperatorFunction.eval(new MathTreeNodeValue(true), functionMap);
                Assert.Fail();
            }
            catch (Exception e)
            {
                Assert.IsTrue(e.GetType() == typeof(ArgumentException));
            }
            try
            {
                unaryOperatorFunction.eval(new MathTreeNodeValue(12345), functionMap);
                Assert.Fail();
            }
            catch (Exception e)
            {
                Assert.IsTrue(e.GetType() == typeof(ArgumentOutOfRangeException));
            }
            try
            {
                unaryOperatorFunction.eval(new MathTreeNodeValue(-123.45), functionMap);
                Assert.Fail();
            }
            catch (Exception e)
            {
                Assert.IsTrue(e.GetType() == typeof(ArgumentOutOfRangeException));
            }
            UnitTestUtil.AssertMathTreeNodeValue((double)0, unaryOperatorFunction.eval(new MathTreeNodeValue(new List <double>()
            {
                1, 2, 3, 4
            }), functionMap));

            unaryOperatorFunction.functionName = "testFunction9";
            Assert.AreEqual("Func[testFunction9]", unaryOperatorFunction.getRPolish());
            Assert.AreEqual(DataType.None, unaryOperatorFunction.getDataType(DataType.Boolean, functionDataTypeMap));
            Assert.AreEqual(DataType.Decimal, unaryOperatorFunction.getDataType(DataType.Integer, functionDataTypeMap));
            Assert.AreEqual(DataType.Decimal, unaryOperatorFunction.getDataType(DataType.Decimal, functionDataTypeMap));
            Assert.AreEqual(DataType.Decimal, unaryOperatorFunction.getDataType(DataType.DecimalList, functionDataTypeMap));
            try
            {
                unaryOperatorFunction.eval(new MathTreeNodeValue(true), functionMap);
                Assert.Fail();
            }
            catch (Exception e)
            {
                Assert.IsTrue(e.GetType() == typeof(ArgumentException));
            }
            UnitTestUtil.AssertMathTreeNodeValue((double)152399025, unaryOperatorFunction.eval(new MathTreeNodeValue(12345), functionMap));
            UnitTestUtil.AssertMathTreeNodeValue(15239.9025, unaryOperatorFunction.eval(new MathTreeNodeValue(-123.45), functionMap));
            UnitTestUtil.AssertMathTreeNodeValue((double)30, unaryOperatorFunction.eval(new MathTreeNodeValue(new List <double>()
            {
                1, 2, 3, 4
            }), functionMap));

            unaryOperatorFunction.functionName = "testFunction10";
            Assert.AreEqual("Func[testFunction10]", unaryOperatorFunction.getRPolish());
            Assert.AreEqual(DataType.None, unaryOperatorFunction.getDataType(DataType.Boolean, functionDataTypeMap));
            Assert.AreEqual(DataType.None, unaryOperatorFunction.getDataType(DataType.Integer, functionDataTypeMap));
            Assert.AreEqual(DataType.None, unaryOperatorFunction.getDataType(DataType.Decimal, functionDataTypeMap));
            Assert.AreEqual(DataType.None, unaryOperatorFunction.getDataType(DataType.DecimalList, functionDataTypeMap));
            try
            {
                unaryOperatorFunction.eval(new MathTreeNodeValue(true), functionMap);
                Assert.Fail();
            }
            catch (Exception e)
            {
                Assert.IsTrue(e.GetType() == typeof(ArgumentException));
            }
            try
            {
                unaryOperatorFunction.eval(new MathTreeNodeValue(12345), functionMap);
                Assert.Fail();
            }
            catch (Exception e)
            {
                Assert.IsTrue(e.GetType() == typeof(ArgumentException));
            }
            try
            {
                unaryOperatorFunction.eval(new MathTreeNodeValue(-123.45), functionMap);
                Assert.Fail();
            }
            catch (Exception e)
            {
                Assert.IsTrue(e.GetType() == typeof(ArgumentException));
            }
            try
            {
                unaryOperatorFunction.eval(new MathTreeNodeValue(new List <double>()
                {
                    1, 2, 3, 4
                }), functionMap);
                Assert.Fail();
            }
            catch (Exception e)
            {
                Assert.IsTrue(e.GetType() == typeof(ArgumentException));
            }
        }
        public static Lexical create(TerminalSymbol terminalSymbol, int parenthesisDepth)
        {
            switch (terminalSymbol.type)
            {
            case TerminalSymbolType.Integer:
                var literalInteger = new LiteralInteger();
                literalInteger.value = terminalSymbol.value;
                return(literalInteger);

            case TerminalSymbolType.Decimal:
                var literalDecimal = new LiteralDecimal();
                literalDecimal.value = terminalSymbol.value;
                return(literalDecimal);

            case TerminalSymbolType.LogicTrue:
                var literalTrue = new LiteralTrue();
                literalTrue.value = terminalSymbol.value;
                return(literalTrue);

            case TerminalSymbolType.LogicFalse:
                var literalFalse = new LiteralFalse();
                literalFalse.value = terminalSymbol.value;
                return(literalFalse);

            case TerminalSymbolType.Variable:
                var literalVariable = new LiteralVariable();
                literalVariable.value = terminalSymbol.value;
                return(literalVariable);

            case TerminalSymbolType.OpAdd:
                var binaryOperatorAdd = new BinaryOperatorAdd();
                binaryOperatorAdd.parenthesisDepth = parenthesisDepth;
                return(binaryOperatorAdd);

            case TerminalSymbolType.OpDiff:
                var binaryOperatorDiff = new BinaryOperatorDiff();
                binaryOperatorDiff.parenthesisDepth = parenthesisDepth;
                return(binaryOperatorDiff);

            case TerminalSymbolType.OpProd:
                var binaryOperatorProd = new BinaryOperatorProd();
                binaryOperatorProd.parenthesisDepth = parenthesisDepth;
                return(binaryOperatorProd);

            case TerminalSymbolType.OpDivide:
                var binaryOperatorDivide = new BinaryOperatorDivide();
                binaryOperatorDivide.parenthesisDepth = parenthesisDepth;
                return(binaryOperatorDivide);

            case TerminalSymbolType.OpMod:
                var binaryOperatorMod = new BinaryOperatorMod();
                binaryOperatorMod.parenthesisDepth = parenthesisDepth;
                return(binaryOperatorMod);

            case TerminalSymbolType.OpPow:
                var binaryOperatorPow = new BinaryOperatorPow();
                binaryOperatorPow.parenthesisDepth = parenthesisDepth;
                return(binaryOperatorPow);

            case TerminalSymbolType.OpNeg:
                var unaryOperatorNegative = new UnaryOperatorNegative();
                unaryOperatorNegative.parenthesisDepth = parenthesisDepth;
                return(unaryOperatorNegative);

            case TerminalSymbolType.OpLt:
                var binaryOperatorLt = new BinaryOperatorLt();
                binaryOperatorLt.parenthesisDepth = parenthesisDepth;
                return(binaryOperatorLt);

            case TerminalSymbolType.OpLtEq:
                var binaryOperatorLtEq = new BinaryOperatorLtEq();
                binaryOperatorLtEq.parenthesisDepth = parenthesisDepth;
                return(binaryOperatorLtEq);

            case TerminalSymbolType.OpGt:
                var binaryOperatorGt = new BinaryOperatorGt();
                binaryOperatorGt.parenthesisDepth = parenthesisDepth;
                return(binaryOperatorGt);

            case TerminalSymbolType.OpGtEq:
                var binaryOperatorGtEq = new BinaryOperatorGtEq();
                binaryOperatorGtEq.parenthesisDepth = parenthesisDepth;
                return(binaryOperatorGtEq);

            case TerminalSymbolType.OpEq:
                var binaryOperatorEqual = new BinaryOperatorEqual();
                binaryOperatorEqual.parenthesisDepth = parenthesisDepth;
                return(binaryOperatorEqual);

            case TerminalSymbolType.OpNotEq:
                var binaryOperatorNotEqual = new BinaryOperatorNotEqual();
                binaryOperatorNotEqual.parenthesisDepth = parenthesisDepth;
                return(binaryOperatorNotEqual);

            case TerminalSymbolType.OpNot:
                var unaryOperatorNot = new UnaryOperatorNot();
                unaryOperatorNot.parenthesisDepth = parenthesisDepth;
                return(unaryOperatorNot);

            case TerminalSymbolType.OpAnd:
                var binaryOperatorAnd = new BinaryOperatorAnd();
                binaryOperatorAnd.parenthesisDepth = parenthesisDepth;
                return(binaryOperatorAnd);

            case TerminalSymbolType.OpOr:
                var binaryOperatorOr = new BinaryOperatorOr();
                binaryOperatorOr.parenthesisDepth = parenthesisDepth;
                return(binaryOperatorOr);

            case TerminalSymbolType.Function:
                var unaryOperatorFunction = new UnaryOperatorFunction();
                // 演算子の中で、関数だけ変数名を登録する必要がある。
                unaryOperatorFunction.functionName     = terminalSymbol.value;
                unaryOperatorFunction.parenthesisDepth = parenthesisDepth;
                return(unaryOperatorFunction);

            case TerminalSymbolType.Comma:
                var binaryOperatorComma = new BinaryOperatorComma();
                binaryOperatorComma.parenthesisDepth = parenthesisDepth;
                return(binaryOperatorComma);

            default:
                throw new ApplicationException("品詞に変換できない終端記号が指定されました。");
            }
        }