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//
// MemberExpression.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.
//
using System;
using System.Reflection;
using System.Reflection.Emit;
namespace System.Linq.Expressions {
public sealed class MemberExpression : Expression {
Expression expression;
MemberInfo member;
public Expression Expression {
get { return expression; }
}
public MemberInfo Member {
get { return member; }
}
internal MemberExpression (Expression expression, MemberInfo member, Type type)
: base (ExpressionType.MemberAccess, type)
{
this.expression = expression;
this.member = member;
}
internal override void Emit (EmitContext ec)
{
member.OnFieldOrProperty (
field => EmitFieldAccess (ec, field),
prop => EmitPropertyAccess (ec, prop));
}
void EmitPropertyAccess (EmitContext ec, PropertyInfo property)
{
var getter = property.GetGetMethod (true);
if (!getter.IsStatic)
ec.EmitLoadSubject (expression);
ec.EmitCall (getter);
}
void EmitFieldAccess (EmitContext ec, FieldInfo field)
{
if (!field.IsStatic) {
ec.EmitLoadSubject (expression);
ec.ig.Emit (OpCodes.Ldfld, field);
} else
ec.ig.Emit (OpCodes.Ldsfld, field);
}
}
}
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