fix

Author: toolgood

csharp/ToolGood.Algorithm/Internals/Functions/FunctionBase.value.cs

@@ -65,7 +65,7 @@ public Function_ERROR(FunctionBase func1) : base(func1)
 
         public override Operand Evaluate(AlgorithmEngine work, Func<string, Operand> tempParameter)
         {
-			var args1 = func1.Evaluate(work, tempParameter); if (args1.IsNotText) { args1 = args1.ToText(); if (args1.IsError) return args1; }
+            var args1 = func1.Evaluate(work, tempParameter); if (args1.IsNotText) { args1 = args1.ToText(); if (args1.IsError) return args1; }
             return Operand.Error(args1.TextValue);
         }
 
@@ -136,8 +136,8 @@ public override Operand Evaluate(AlgorithmEngine work, Func<string, Operand> tem
         {
             var txt = name;
             if (string.IsNullOrEmpty(name)) {
-				var args1 = func1.Evaluate(work, tempParameter); if (args1.IsNotText) { args1 = args1.ToText(); if (args1.IsError) return args1; }
-				txt = args1.TextValue;
+                var args1 = func1.Evaluate(work, tempParameter); if (args1.IsNotText) { args1 = args1.ToText(); if (args1.IsError) return args1; }
+                txt = args1.TextValue;
             } else {
                 txt = name;
             }
@@ -347,9 +347,9 @@ public Function_JSON(FunctionBase func1) : base(func1)
         public override Operand Evaluate(AlgorithmEngine work, Func<string, Operand> tempParameter)
         {
             var args1 = func1.Evaluate(work, tempParameter);
-            if (args1.IsJson) { return args1; }
-            args1 = args1.ToText("Function '{0}' parameter is error!", "Json");
             if (args1.IsError) { return args1; }
+            if (args1.IsJson) { return args1; }
+            if (args1.IsNotText) { return Operand.Error("Function '{0}' parameter is error!", "Json"); }
             var txt = args1.TextValue;
             if ((txt.StartsWith('{') && txt.EndsWith('}')) || (txt.StartsWith('[') && txt.EndsWith(']'))) {
                 try {