Flee

ExpressionElements/LogicalBitwise/Not.cs

@@ -0,0 +1,46 @@
+using System.Reflection.Emit;
+using Flee.ExpressionElements.Base;
+using Flee.InternalTypes;
+
+
+namespace Flee.ExpressionElements.LogicalBitwise
+{
+    internal class NotElement : UnaryElement
+    {
+        public override void Emit(FleeILGenerator ilg, IServiceProvider services)
+        {
+            if (object.ReferenceEquals(MyChild.ResultType, typeof(bool)))
+            {
+                this.EmitLogical(ilg, services);
+            }
+            else
+            {
+                MyChild.Emit(ilg, services);
+                ilg.Emit(OpCodes.Not);
+            }
+        }
+
+        private void EmitLogical(FleeILGenerator ilg, IServiceProvider services)
+        {
+            MyChild.Emit(ilg, services);
+            ilg.Emit(OpCodes.Ldc_I4_0);
+            ilg.Emit(OpCodes.Ceq);
+        }
+
+        protected override System.Type GetResultType(System.Type childType)
+        {
+            if (object.ReferenceEquals(childType, typeof(bool)))
+            {
+                return typeof(bool);
+            }
+            else if (Utility.IsIntegralType(childType) == true)
+            {
+                return childType;
+            }
+            else
+            {
+                return null;
+            }
+        }
+    }
+}