加入自动类型转换

Parser/ExpressionParser.cs

@@ -1,12 +1,62 @@
 using Flee.PublicTypes;
-using System;
 using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
 
-namespace Convention.RScript.Parser
+namespace Convention.RScript
 {
+    public static class ExpressionMath
+    {
+        public static int Sign(double value, double accuracy = ExpressionExtension.DefaultDoubleAccuracy)
+        {
+            if (value.IsCloseToZero(accuracy))
+                return 0;
+            return value > 0 ? 1 : -1;
+        }
+
+        public static int Compare(double value1, double value2, double accuracy = ExpressionExtension.DefaultDoubleAccuracy)
+        {
+            if (value1.IsClose(value2, accuracy))
+                return 0;
+            return value1 > value2 ? 1 : -1;
+        }
+
+        public static bool IsBetween(double value, double minValue, double maxValue, double accuracy = ExpressionExtension.DefaultDoubleAccuracy)
+        {
+            return Compare(value, minValue, accuracy) >= 0 && Compare(value, maxValue, accuracy) <= 0;
+        }
+
+        public static bool IsBetweenExclusive(double value, double minValue, double maxValue, double accuracy = ExpressionExtension.DefaultDoubleAccuracy)
+        {
+            return Compare(value, minValue, accuracy) > 0 && Compare(value, maxValue, accuracy) < 0;
+        }
+
+        public static int ToInt(double value)
+        {
+            return (int)value;
+        }
+
+        public static int ToInt(float value)
+        {
+            return (int)value;
+        }
+        public static int ToInt(int value)
+        {
+            return (int)value;
+        }
+
+        public static double ToDouble(float value)
+        {
+            return (double)value;
+        }
+
+        public static double ToDouble(int value)
+        {
+            return (double)value;
+        }
+        public static double ToDouble(double value)
+        {
+            return (double)value;
+        }
+    }
     public static class ExpressionExtension
     {
         public const double DefaultDoubleAccuracy = 1e-7;
@@ -32,7 +82,10 @@ namespace Convention.RScript.Parser
             return !(double.IsInfinity(value) || double.IsNaN(value) || value > maximumAbsoluteError || value < -maximumAbsoluteError);
         }
     }
+}
 
+namespace Convention.RScript.Parser
+{
     public class ExpressionParser
     {
         public readonly ExpressionContext context;