2008-11-19 Jb Evain <jbevain@novell.com>

[mono.git] / mcs / class / System.Core / System.Linq.Expressions / TypeBinaryExpression.cs

diff --git a/mcs/class/System.Core/System.Linq.Expressions/TypeBinaryExpression.cs b/mcs/class/System.Core/System.Linq.Expressions/TypeBinaryExpression.cs
index 7104e1d4b05122cf7d0df3ae01a23dd28fbded1e..4463e4e8b29a754f90933b0e66db17edd3e3bacb 100644 (file)
--- a/mcs/class/System.Core/System.Linq.Expressions/TypeBinaryExpression.cs
+++ b/mcs/class/System.Core/System.Linq.Expressions/TypeBinaryExpression.cs
@@ -1,67 +1,67 @@
-// Permission is hereby granted, free of charge, to any person obtaining
+//
+// TypeBinaryExpression.cs
+//
+// Author:
+//   Jb Evain (jbevain@novell.com)
+//
+// (C) 2008 Novell, Inc. (http://www.novell.com)
+//
+// Permission is hereby granted, free of charge, to any person obtaining
 // a copy of this software and associated documentation files (the
 // "Software"), to deal in the Software without restriction, including
 // without limitation the rights to use, copy, modify, merge, publish,
 // distribute, sublicense, and/or sell copies of the Software, and to
 // permit persons to whom the Software is furnished to do so, subject to
 // the following conditions:
-// 
+//
 // The above copyright notice and this permission notice shall be
 // included in all copies or substantial portions of the Software.
-// 
+//
 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 //
-// Authors:
-//        Antonello Provenzano  <antonello@deveel.com>
-//        Federico Di Gregorio  <fog@initd.org>
-//
 
-using System.Text;
+using System;
+using System.Reflection.Emit;
+
+namespace System.Linq.Expressions {
+
+       public sealed class TypeBinaryExpression : Expression {
+
+               Expression expression;
+               Type type_operand;
+
+               public Expression Expression {
+                       get { return expression; }
+               }
 
-namespace System.Linq.Expressions
-{
-    public sealed class TypeBinaryExpression : Expression
-    {
-        #region .ctor
-        internal TypeBinaryExpression (ExpressionType nt, Expression expression, Type typeop, Type resultType)
-            : base (nt, resultType)
-        {
-            this.expression = expression;
-            this.typeop = typeop;
-        }
-        #endregion
+               public Type TypeOperand {
+                       get { return type_operand; }
+               }
 
-        #region Fields
-        private Expression expression;
-        private Type typeop;
-        #endregion
+               internal TypeBinaryExpression (ExpressionType node_type, Expression expression, Type type_operand, Type type)
+                       : base (node_type, type)
+               {
+                       this.expression = expression;
+                       this.type_operand = type_operand;
+               }
 
-        #region Properties
-        public Expression Expression {
-            get { return expression; }
-        }
+               internal override void Emit (EmitContext ec)
+               {
+                       if (expression.Type == typeof (void)) {
+                               ec.ig.Emit (OpCodes.Ldc_I4_0);
+                               return;
+                       }
 
-        public Type TypeOperand {
-            get { return typeop; }
-        }
-        #endregion
+                       ec.EmitIsInst (expression, type_operand);
 
-        #region Internal Methods
-        internal override void BuildString(StringBuilder builder)
-        {
-            builder.Append ("(");
-            expression.BuildString(builder);
-            builder.Append (" Is ");
-            // That would be better (because incorporates namespace information) but MS code does it the other way.
-            // builder.Append (typeop.Namespace == "System" ? typeop.Name : typeop.FullName);
-            builder.Append (typeop.Name);            
-            builder.Append (")");
-        }
-        #endregion
-    }
-}
\ No newline at end of file
+                       ec.ig.Emit (OpCodes.Ldnull);
+                       ec.ig.Emit (OpCodes.Cgt_Un);
+               }
+       }
+}