//
// MemberBinding.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 abstract class MemberBinding {
MemberBindingType binding_type;
MemberInfo member;
public MemberBindingType BindingType {
get { return binding_type; }
}
public MemberInfo Member {
get { return member; }
}
protected MemberBinding (MemberBindingType binding_type, MemberInfo member)
{
this.binding_type = binding_type;
this.member = member;
}
public override string ToString ()
{
return ExpressionPrinter.ToString (this);
}
internal abstract void Emit (EmitContext ec, LocalBuilder local);
internal LocalBuilder EmitLoadMember (EmitContext ec, LocalBuilder local)
{
ec.EmitLoadSubject (local);
return member.OnFieldOrProperty<LocalBuilder> (
field => EmitLoadField (ec, field),
prop => EmitLoadProperty (ec, prop));
}
LocalBuilder EmitLoadProperty (EmitContext ec, PropertyInfo property)
{
var getter = property.GetGetMethod (true);
if (getter == null)
throw new NotSupportedException ();
var store = ec.ig.DeclareLocal (property.PropertyType);
ec.EmitCall (getter);
ec.ig.Emit (OpCodes.Stloc, store);
return store;
}
LocalBuilder EmitLoadField (EmitContext ec, FieldInfo field)
{
var store = ec.ig.DeclareLocal (field.FieldType);
ec.ig.Emit (OpCodes.Ldfld, field);
ec.ig.Emit (OpCodes.Stloc, store);
return store;
}
}
}
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