Example #1
0
		IValue Parse (string aExpression)
		{
			aExpression = aExpression.Trim ();
			int index = aExpression.IndexOf ('(');
			while (index >= 0) {
				SubstitudeBracket (ref aExpression, index);
				index = aExpression.IndexOf ('(');
			}
			if (aExpression.Contains (',')) {
				string[] parts = aExpression.Split (',');
				List<IValue> exp = new List<IValue> (parts.Length);
				for (int i = 0; i < parts.Length; i++) {
					string s = parts [i].Trim ();
					if (!string.IsNullOrEmpty (s))
						exp.Add (Parse (s));
				}
				return new MultiParameterList (exp.ToArray ());
			} else if (aExpression.Contains ('+')) {
				string[] parts = aExpression.Split ('+');
				List<IValue> exp = new List<IValue> (parts.Length);
				for (int i = 0; i < parts.Length; i++) {
					string s = parts [i].Trim ();
					if (!string.IsNullOrEmpty (s))
						exp.Add (Parse (s));
				}
				if (exp.Count == 1)
					return exp [0];
				return new OperationSum (exp.ToArray ());
			} else if (aExpression.Contains ('-')) {
				string[] parts = aExpression.Split ('-');
				List<IValue> exp = new List<IValue> (parts.Length);
				if (!string.IsNullOrEmpty (parts [0].Trim ()))
					exp.Add (Parse (parts [0]));
				for (int i = 1; i < parts.Length; i++) {
					string s = parts [i].Trim ();
					if (!string.IsNullOrEmpty (s))
						exp.Add (new OperationNegate (Parse (s)));
				}
				if (exp.Count == 1)
					return exp [0];
				return new OperationSum (exp.ToArray ());
			} else if (aExpression.Contains ('*')) {
				string[] parts = aExpression.Split ('*');
				List<IValue> exp = new List<IValue> (parts.Length);
				for (int i = 0; i < parts.Length; i++) {
					exp.Add (Parse (parts [i]));
				}
				if (exp.Count == 1)
					return exp [0];
				return new OperationProduct (exp.ToArray ());
			} else if (aExpression.Contains ('/')) {
				string[] parts = aExpression.Split ('/');
				List<IValue> exp = new List<IValue> (parts.Length);
				if (!string.IsNullOrEmpty (parts [0].Trim ()))
					exp.Add (Parse (parts [0]));
				for (int i = 1; i < parts.Length; i++) {
					string s = parts [i].Trim ();
					if (!string.IsNullOrEmpty (s))
						exp.Add (new OperationReciprocal (Parse (s)));
				}
				return new OperationProduct (exp.ToArray ());
			} else if (aExpression.Contains ('^')) {
				int pos = aExpression.IndexOf ('^');
				var val = Parse (aExpression.Substring (0, pos));
				var pow = Parse (aExpression.Substring (pos + 1));
				return new OperationPower (val, pow);
			}
			foreach (var M in m_Funcs) {
				if (aExpression.StartsWith (M.Key)) {
					var inner = aExpression.Substring (M.Key.Length);
					var param = Parse (inner);
					var multiParams = param as MultiParameterList;
					IValue[] parameters;
					if (multiParams != null)
						parameters = multiParams.Parameters;
					else
						parameters = new IValue[] { param };
					return new CustomFunction (M.Key, M.Value, parameters);
				}
			}
			foreach (var C in m_Consts) {
				if (aExpression.StartsWith (C.Key)) {
					return new CustomFunction (C.Key, (p) => C.Value (), null);
				}
			}
			int index2a = aExpression.IndexOf ('&');
			int index2b = aExpression.IndexOf (';');
			if (index2a >= 0 && index2b >= 2) {
				var inner = aExpression.Substring (index2a + 1, index2b - index2a - 1);
				int bracketIndex;
				if (int.TryParse (inner, out bracketIndex) && bracketIndex >= 0 && bracketIndex < m_BracketHeap.Count) {
					return Parse (m_BracketHeap [bracketIndex]);
				} else
					throw new ParseException ("Can't parse substitude token");
			}
			double doubleValue;
			if (double.TryParse (aExpression, out doubleValue)) {
				return new Number (doubleValue);
			}
			if (ValidIdentifier (aExpression)) {
				if (m_Context.Parameters.ContainsKey (aExpression))
					return m_Context.Parameters [aExpression];
				var val = new Parameter (aExpression);
				m_Context.Parameters.Add (aExpression, val);
				return val;
			}
 
			throw new ParseException ("Reached unexpected end within the parsing tree");
		}
Example #2
0
		double[] InvokeMultiResult (double[] aParams, Parameter[] aParamList)
		{
			int count = System.Math.Min (aParamList.Length, aParams.Length);
			for (int i = 0; i < count; i++) {
				if (aParamList [i] != null)
					aParamList [i].Value = aParams [i];
			}
			return MultiValue;
		}