//
// MemberAssignement.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;
using System.Text;
namespace System.Linq.Expressions{
public sealed class MemberAssignment : MemberBinding {
Expression expression;
public Expression Expression {
get { return expression; }
}
internal MemberAssignment (MemberInfo member, Expression expression)
: base (MemberBindingType.Assignment, member)
{
this.expression = expression;
}
internal override void Emit (EmitContext ec, LocalBuilder local)
{
this.Member.OnFieldOrProperty (
field => EmitFieldAssignment (ec, field, local),
prop => EmitPropertyAssignment (ec, prop, local));
}
void EmitFieldAssignment (EmitContext ec, FieldInfo field, LocalBuilder local)
{
ec.EmitLoadSubject (local);
expression.Emit (ec);
ec.ig.Emit (OpCodes.Stfld, field);
}
void EmitPropertyAssignment (EmitContext ec, PropertyInfo property, LocalBuilder local)
{
var setter = property.GetSetMethod (true);
if (setter == null)
throw new InvalidOperationException ();
ec.EmitLoadSubject (local);
expression.Emit (ec);
ec.EmitCall (setter);
}
}
}
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