niko
98 lines
3.4 KiB
C#
98 lines
3.4 KiB
C#
using System;
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using System.Collections.ObjectModel;
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using System.Reflection;
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using System.Reflection.Emit;
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namespace System.Linq.Expressions
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{
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/// <summary>Represents creating a new array and possibly initializing the elements of the new array.</summary>
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// Token: 0x0200002C RID: 44
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public sealed class NewArrayExpression : Expression
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{
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// Token: 0x06000239 RID: 569 RVA: 0x0000BD5C File Offset: 0x00009F5C
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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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/// <summary>Gets the bounds of the array if the value of the <see cref="P:System.Linq.Expressions.Expression.NodeType" /> property is <see cref="F:System.Linq.Expressions.ExpressionType.NewArrayBounds" />, or the values to initialize the elements of the new array if the value of the <see cref="P:System.Linq.Expressions.Expression.NodeType" /> property is <see cref="F:System.Linq.Expressions.ExpressionType.NewArrayInit" />.</summary>
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/// <returns>A <see cref="T:System.Collections.ObjectModel.ReadOnlyCollection`1" /> of <see cref="T:System.Linq.Expressions.Expression" /> objects which represent either the bounds of the array or the initialization values.</returns>
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// Token: 0x1700002F RID: 47
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// (get) Token: 0x0600023A RID: 570 RVA: 0x0000BD70 File Offset: 0x00009F70
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public ReadOnlyCollection<Expression> Expressions
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{
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get
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{
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return this.expressions;
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}
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}
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// Token: 0x0600023B RID: 571 RVA: 0x0000BD78 File Offset: 0x00009F78
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private void EmitNewArrayInit(EmitContext ec, Type type)
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{
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int count = this.expressions.Count;
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ec.ig.Emit(OpCodes.Ldc_I4, count);
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ec.ig.Emit(OpCodes.Newarr, type);
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for (int i = 0; i < count; i++)
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{
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ec.ig.Emit(OpCodes.Dup);
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ec.ig.Emit(OpCodes.Ldc_I4, i);
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this.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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// Token: 0x0600023C RID: 572 RVA: 0x0000BE0C File Offset: 0x0000A00C
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private void EmitNewArrayBounds(EmitContext ec, Type type)
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{
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int count = this.expressions.Count;
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ec.EmitCollection<Expression>(this.expressions);
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if (count == 1)
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{
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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, NewArrayExpression.GetArrayConstructor(type, count));
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}
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// Token: 0x0600023D RID: 573 RVA: 0x0000BE64 File Offset: 0x0000A064
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private static ConstructorInfo GetArrayConstructor(Type type, int rank)
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{
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return NewArrayExpression.CreateArray(type, rank).GetConstructor(NewArrayExpression.CreateTypeParameters(rank));
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}
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// Token: 0x0600023E RID: 574 RVA: 0x0000BE78 File Offset: 0x0000A078
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private static Type[] CreateTypeParameters(int rank)
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{
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return Enumerable.Repeat<Type>(typeof(int), rank).ToArray<Type>();
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}
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// Token: 0x0600023F RID: 575 RVA: 0x0000BE90 File Offset: 0x0000A090
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private 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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// Token: 0x06000240 RID: 576 RVA: 0x0000BE9C File Offset: 0x0000A09C
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internal override void Emit(EmitContext ec)
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{
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Type elementType = base.Type.GetElementType();
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ExpressionType nodeType = base.NodeType;
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if (nodeType == ExpressionType.NewArrayInit)
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{
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this.EmitNewArrayInit(ec, elementType);
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return;
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}
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if (nodeType != ExpressionType.NewArrayBounds)
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{
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throw new NotSupportedException();
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}
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this.EmitNewArrayBounds(ec, elementType);
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}
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// Token: 0x040000B9 RID: 185
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private ReadOnlyCollection<Expression> expressions;
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}
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}
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