Flee

ExpressionElements/Base/Literals/Real.cs

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+using System.Diagnostics;
+using Flee.ExpressionElements.Literals.Real;
+using Flee.PublicTypes;
+
+namespace Flee.ExpressionElements.Base.Literals
+{
+    internal abstract class RealLiteralElement : LiteralElement
+    {
+        protected RealLiteralElement()
+        {
+        }
+
+        public static LiteralElement CreateFromInteger(string image, IServiceProvider services)
+        {
+            LiteralElement element = default(LiteralElement);
+
+            element = CreateSingle(image, services);
+
+            if ((element != null))
+            {
+                return element;
+            }
+
+            element = CreateDecimal(image, services);
+
+            if ((element != null))
+            {
+                return element;
+            }
+
+            ExpressionOptions options = (ExpressionOptions)services.GetService(typeof(ExpressionOptions));
+
+            // Convert to a double if option is set
+            if (options.IntegersAsDoubles == true)
+            {
+                return DoubleLiteralElement.Parse(image, services);
+            }
+
+            return null;
+        }
+
+        public static LiteralElement Create(string image, IServiceProvider services)
+        {
+            LiteralElement element = default(LiteralElement);
+
+            element = CreateSingle(image, services);
+
+            if ((element != null))
+            {
+                return element;
+            }
+
+            element = CreateDecimal(image, services);
+
+            if ((element != null))
+            {
+                return element;
+            }
+
+            element = CreateDouble(image, services);
+
+            if ((element != null))
+            {
+                return element;
+            }
+
+            element = CreateImplicitReal(image, services);
+
+            return element;
+        }
+
+        private static LiteralElement CreateImplicitReal(string image, IServiceProvider services)
+        {
+            ExpressionOptions options = (ExpressionOptions)services.GetService(typeof(ExpressionOptions));
+            RealLiteralDataType realType = options.RealLiteralDataType;
+
+            switch (realType)
+            {
+                case RealLiteralDataType.Double:
+                    return DoubleLiteralElement.Parse(image, services);
+                case RealLiteralDataType.Single:
+                    return SingleLiteralElement.Parse(image, services);
+                case RealLiteralDataType.Decimal:
+                    return DecimalLiteralElement.Parse(image, services);
+                default:
+                    Debug.Fail("Unknown value");
+                    return null;
+            }
+        }
+
+        private static DoubleLiteralElement CreateDouble(string image, IServiceProvider services)
+        {
+            if (image.EndsWith("d", StringComparison.OrdinalIgnoreCase) == true)
+            {
+                image = image.Remove(image.Length - 1);
+                return DoubleLiteralElement.Parse(image, services);
+            }
+            else
+            {
+                return null;
+            }
+        }
+
+        private static SingleLiteralElement CreateSingle(string image, IServiceProvider services)
+        {
+            if (image.EndsWith("f", StringComparison.OrdinalIgnoreCase) == true)
+            {
+                image = image.Remove(image.Length - 1);
+                return SingleLiteralElement.Parse(image, services);
+            }
+            else
+            {
+                return null;
+            }
+        }
+
+        private static DecimalLiteralElement CreateDecimal(string image, IServiceProvider services)
+        {
+            if (image.EndsWith("m", StringComparison.OrdinalIgnoreCase) == true)
+            {
+                image = image.Remove(image.Length - 1);
+                return DecimalLiteralElement.Parse(image, services);
+            }
+            else
+            {
+                return null;
+            }
+        }
+    }
+}