116 lines
3.1 KiB
C#
116 lines
3.1 KiB
C#
//
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// NewArrayExpression.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.Linq;
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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 NewArrayExpression : Expression {
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ReadOnlyCollection<Expression> expressions;
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public ReadOnlyCollection<Expression> Expressions {
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get { return expressions; }
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}
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internal NewArrayExpression (ExpressionType et, Type type, ReadOnlyCollection<Expression> expressions)
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: base (et, type)
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{
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this.expressions = expressions;
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}
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#if !FULL_AOT_RUNTIME
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void EmitNewArrayInit (EmitContext ec, Type type)
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{
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var size = expressions.Count;
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ec.ig.Emit (OpCodes.Ldc_I4, size);
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ec.ig.Emit (OpCodes.Newarr, type);
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for (int i = 0; i < size; i++) {
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ec.ig.Emit (OpCodes.Dup);
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ec.ig.Emit (OpCodes.Ldc_I4, i);
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expressions [i].Emit (ec);
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ec.ig.Emit (OpCodes.Stelem, type);
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}
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}
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void EmitNewArrayBounds (EmitContext ec, Type type)
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{
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int rank = expressions.Count;
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ec.EmitCollection (expressions);
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if (rank == 1) {
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ec.ig.Emit (OpCodes.Newarr, type);
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return;
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}
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ec.ig.Emit(OpCodes.Newobj, GetArrayConstructor (type, rank));
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}
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static ConstructorInfo GetArrayConstructor (Type type, int rank)
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{
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return CreateArray (type, rank).GetConstructor (CreateTypeParameters (rank));
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}
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static Type [] CreateTypeParameters (int rank)
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{
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return Enumerable.Repeat (typeof (int), rank).ToArray ();
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}
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static Type CreateArray (Type type, int rank)
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{
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return type.MakeArrayType (rank);
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}
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internal override void Emit (EmitContext ec)
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{
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var type = this.Type.GetElementType ();
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switch (this.NodeType) {
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case ExpressionType.NewArrayInit:
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EmitNewArrayInit (ec, type);
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return;
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case ExpressionType.NewArrayBounds:
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EmitNewArrayBounds (ec, type);
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return;
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default:
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throw new NotSupportedException ();
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}
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}
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#endif
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}
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}
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