2 // TypeBinaryExpression.cs
5 // Jb Evain (jbevain@novell.com)
7 // (C) 2008 Novell, Inc. (http://www.novell.com)
9 // Permission is hereby granted, free of charge, to any person obtaining
10 // a copy of this software and associated documentation files (the
11 // "Software"), to deal in the Software without restriction, including
12 // without limitation the rights to use, copy, modify, merge, publish,
13 // distribute, sublicense, and/or sell copies of the Software, and to
14 // permit persons to whom the Software is furnished to do so, subject to
15 // the following conditions:
17 // The above copyright notice and this permission notice shall be
18 // included in all copies or substantial portions of the Software.
20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
30 using System
.Reflection
.Emit
;
32 namespace System
.Linq
.Expressions
{
34 public sealed class TypeBinaryExpression
: Expression
{
36 Expression expression
;
39 public Expression Expression
{
40 get { return expression; }
43 public Type TypeOperand
{
44 get { return type_operand; }
47 internal TypeBinaryExpression (ExpressionType node_type
, Expression expression
, Type type_operand
, Type type
)
48 : base (node_type
, type
)
50 this.expression
= expression
;
51 this.type_operand
= type_operand
;
54 internal override void Emit (EmitContext ec
)
56 if (expression
.Type
== typeof (void)) {
57 ec
.ig
.Emit (OpCodes
.Ldc_I4_0
);
61 ec
.EmitIsInst (expression
, type_operand
);
63 ec
.ig
.Emit (OpCodes
.Ldnull
);
64 ec
.ig
.Emit (OpCodes
.Cgt_Un
);