104 lines
2.9 KiB
C#
104 lines
2.9 KiB
C#
//
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// NewExpression.cs
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//
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// Author:
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// Jb Evain (jbevain@novell.com)
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//
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// (C) 2008 Novell, Inc. (http://www.novell.com)
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System;
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using System.Collections.ObjectModel;
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using System.Reflection;
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#if !FULL_AOT_RUNTIME
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using System.Reflection.Emit;
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#endif
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namespace System.Linq.Expressions {
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public sealed class NewExpression : Expression {
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ConstructorInfo constructor;
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ReadOnlyCollection<Expression> arguments;
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ReadOnlyCollection<MemberInfo> members;
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public ConstructorInfo Constructor {
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get { return constructor; }
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}
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public ReadOnlyCollection<Expression> Arguments {
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get { return arguments; }
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}
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public ReadOnlyCollection<MemberInfo> Members {
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get { return members; }
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}
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internal NewExpression (Type type, ReadOnlyCollection<Expression> arguments)
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: base (ExpressionType.New, type)
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{
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this.arguments = arguments;
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}
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internal NewExpression (ConstructorInfo constructor, ReadOnlyCollection<Expression> arguments, ReadOnlyCollection<MemberInfo> members)
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: base (ExpressionType.New, constructor.DeclaringType)
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{
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this.constructor = constructor;
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this.arguments = arguments;
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this.members = members;
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}
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#if !FULL_AOT_RUNTIME
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internal override void Emit (EmitContext ec)
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{
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var ig = ec.ig;
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var type = this.Type;
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LocalBuilder local = null;
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if (type.IsValueType) {
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local = ig.DeclareLocal (type);
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ig.Emit (OpCodes.Ldloca, local);
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if (constructor == null) {
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ig.Emit (OpCodes.Initobj, type);
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ig.Emit (OpCodes.Ldloc, local);
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return;
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}
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}
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ec.EmitCollection (arguments);
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if (type.IsValueType) {
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ig.Emit (OpCodes.Call, constructor);
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ig.Emit (OpCodes.Ldloc, local);
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} else
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ig.Emit (OpCodes.Newobj, constructor ?? GetDefaultConstructor (type));
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}
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#endif
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static ConstructorInfo GetDefaultConstructor (Type type)
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{
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return type.GetConstructor (Type.EmptyTypes);
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}
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}
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}
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