1 /* ****************************************************************************
3 * Copyright (c) Microsoft Corporation.
5 * This source code is subject to terms and conditions of the Apache License, Version 2.0. A
6 * copy of the license can be found in the License.html file at the root of this distribution. If
7 * you cannot locate the Apache License, Version 2.0, please send an email to
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9 * by the terms of the Apache License, Version 2.0.
11 * You must not remove this notice, or any other, from this software.
14 * ***************************************************************************/
17 using System.Collections;
18 using System.Collections.Generic;
19 using System.Collections.ObjectModel;
20 using System.Dynamic.Utils;
21 using System.Reflection;
24 namespace Microsoft.Scripting.Ast {
26 namespace System.Linq.Expressions {
30 /// Represents initializing the elements of a collection member of a newly created object.
32 public sealed class MemberListBinding : MemberBinding {
33 ReadOnlyCollection<ElementInit> _initializers;
34 internal MemberListBinding(MemberInfo member, ReadOnlyCollection<ElementInit> initializers)
35 #pragma warning disable 618
36 : base(MemberBindingType.ListBinding, member) {
37 #pragma warning restore 618
38 _initializers = initializers;
42 /// Gets the element initializers for initializing a collection member of a newly created object.
44 public ReadOnlyCollection<ElementInit> Initializers {
45 get { return _initializers; }
49 /// Creates a new expression that is like this one, but using the
50 /// supplied children. If all of the children are the same, it will
51 /// return this expression.
53 /// <param name="initializers">The <see cref="Initializers" /> property of the result.</param>
54 /// <returns>This expression if no children changed, or an expression with the updated children.</returns>
55 public MemberListBinding Update(IEnumerable<ElementInit> initializers) {
56 if (initializers == Initializers) {
59 return Expression.ListBind(Member, initializers);
64 public partial class Expression {
66 ///<summary>Creates a <see cref="T:System.Linq.Expressions.MemberListBinding" /> where the member is a field or property.</summary>
67 ///<returns>A <see cref="T:System.Linq.Expressions.MemberListBinding" /> that has the <see cref="P:System.Linq.Expressions.MemberBinding.BindingType" /> property equal to <see cref="F:System.Linq.Expressions.MemberBindingType.ListBinding" /> and the <see cref="P:System.Linq.Expressions.MemberBinding.Member" /> and <see cref="P:System.Linq.Expressions.MemberListBinding.Initializers" /> properties set to the specified values.</returns>
68 ///<param name="member">A <see cref="T:System.Reflection.MemberInfo" /> that represents a field or property to set the <see cref="P:System.Linq.Expressions.MemberBinding.Member" /> property equal to.</param>
69 ///<param name="initializers">An array of <see cref="T:System.Linq.Expressions.ElementInit" /> objects to use to populate the <see cref="P:System.Linq.Expressions.MemberListBinding.Initializers" /> collection.</param>
70 ///<exception cref="T:System.ArgumentNullException">
71 ///<paramref name="member" /> is null. -or-One or more elements of <paramref name="initializers" /> is null.</exception>
72 ///<exception cref="T:System.ArgumentException">
73 ///<paramref name="member" /> does not represent a field or property.-or-The <see cref="P:System.Reflection.FieldInfo.FieldType" /> or <see cref="P:System.Reflection.PropertyInfo.PropertyType" /> of the field or property that <paramref name="member" /> represents does not implement <see cref="T:System.Collections.IEnumerable" />.</exception>
74 public static MemberListBinding ListBind(MemberInfo member, params ElementInit[] initializers) {
75 ContractUtils.RequiresNotNull(member, "member");
76 ContractUtils.RequiresNotNull(initializers, "initializers");
77 return ListBind(member, (IEnumerable<ElementInit>)initializers);
80 ///<summary>Creates a <see cref="T:System.Linq.Expressions.MemberListBinding" /> where the member is a field or property.</summary>
81 ///<returns>A <see cref="T:System.Linq.Expressions.MemberListBinding" /> that has the <see cref="P:System.Linq.Expressions.MemberBinding.BindingType" /> property equal to <see cref="F:System.Linq.Expressions.MemberBindingType.ListBinding" /> and the <see cref="P:System.Linq.Expressions.MemberBinding.Member" /> and <see cref="P:System.Linq.Expressions.MemberListBinding.Initializers" /> properties set to the specified values.</returns>
82 ///<param name="member">A <see cref="T:System.Reflection.MemberInfo" /> that represents a field or property to set the <see cref="P:System.Linq.Expressions.MemberBinding.Member" /> property equal to.</param>
83 ///<param name="initializers">An <see cref="T:System.Collections.Generic.IEnumerable`1" /> that contains <see cref="T:System.Linq.Expressions.ElementInit" /> objects to use to populate the <see cref="P:System.Linq.Expressions.MemberListBinding.Initializers" /> collection.</param>
84 ///<exception cref="T:System.ArgumentNullException">
85 ///<paramref name="member" /> is null. -or-One or more elements of <paramref name="initializers" /> is null.</exception>
86 ///<exception cref="T:System.ArgumentException">
87 ///<paramref name="member" /> does not represent a field or property.-or-The <see cref="P:System.Reflection.FieldInfo.FieldType" /> or <see cref="P:System.Reflection.PropertyInfo.PropertyType" /> of the field or property that <paramref name="member" /> represents does not implement <see cref="T:System.Collections.IEnumerable" />.</exception>
88 public static MemberListBinding ListBind(MemberInfo member, IEnumerable<ElementInit> initializers) {
89 ContractUtils.RequiresNotNull(member, "member");
90 ContractUtils.RequiresNotNull(initializers, "initializers");
92 ValidateGettableFieldOrPropertyMember(member, out memberType);
93 var initList = initializers.ToReadOnly();
94 ValidateListInitArgs(memberType, initList);
95 return new MemberListBinding(member, initList);
98 ///<summary>Creates a <see cref="T:System.Linq.Expressions.MemberListBinding" /> object based on a specified property accessor method.</summary>
99 ///<returns>A <see cref="T:System.Linq.Expressions.MemberListBinding" /> that has the <see cref="P:System.Linq.Expressions.MemberBinding.BindingType" /> property equal to <see cref="F:System.Linq.Expressions.MemberBindingType.ListBinding" />, the <see cref="P:System.Linq.Expressions.MemberBinding.Member" /> property set to the <see cref="T:System.Reflection.MemberInfo" /> that represents the property accessed in <paramref name="propertyAccessor" />, and <see cref="P:System.Linq.Expressions.MemberListBinding.Initializers" /> populated with the elements of <paramref name="initializers" />.</returns>
100 ///<param name="propertyAccessor">A <see cref="T:System.Reflection.MethodInfo" /> that represents a property accessor method.</param>
101 ///<param name="initializers">An array of <see cref="T:System.Linq.Expressions.ElementInit" /> objects to use to populate the <see cref="P:System.Linq.Expressions.MemberListBinding.Initializers" /> collection.</param>
102 ///<exception cref="T:System.ArgumentNullException">
103 ///<paramref name="propertyAccessor" /> is null. -or-One or more elements of <paramref name="initializers" /> is null.</exception>
104 ///<exception cref="T:System.ArgumentException">
105 ///<paramref name="propertyAccessor" /> does not represent a property accessor method.-or-The <see cref="P:System.Reflection.PropertyInfo.PropertyType" /> of the property that the method represented by <paramref name="propertyAccessor" /> accesses does not implement <see cref="T:System.Collections.IEnumerable" />.</exception>
106 public static MemberListBinding ListBind(MethodInfo propertyAccessor, params ElementInit[] initializers) {
107 ContractUtils.RequiresNotNull(propertyAccessor, "propertyAccessor");
108 ContractUtils.RequiresNotNull(initializers, "initializers");
109 return ListBind(propertyAccessor, (IEnumerable<ElementInit>)initializers);
112 ///<summary>Creates a <see cref="T:System.Linq.Expressions.MemberListBinding" /> based on a specified property accessor method.</summary>
113 ///<returns>A <see cref="T:System.Linq.Expressions.MemberListBinding" /> that has the <see cref="P:System.Linq.Expressions.MemberBinding.BindingType" /> property equal to <see cref="F:System.Linq.Expressions.MemberBindingType.ListBinding" />, the <see cref="P:System.Linq.Expressions.MemberBinding.Member" /> property set to the <see cref="T:System.Reflection.MemberInfo" /> that represents the property accessed in <paramref name="propertyAccessor" />, and <see cref="P:System.Linq.Expressions.MemberListBinding.Initializers" /> populated with the elements of <paramref name="initializers" />.</returns>
114 ///<param name="propertyAccessor">A <see cref="T:System.Reflection.MethodInfo" /> that represents a property accessor method.</param>
115 ///<param name="initializers">An <see cref="T:System.Collections.Generic.IEnumerable`1" /> that contains <see cref="T:System.Linq.Expressions.ElementInit" /> objects to use to populate the <see cref="P:System.Linq.Expressions.MemberListBinding.Initializers" /> collection.</param>
116 ///<exception cref="T:System.ArgumentNullException">
117 ///<paramref name="propertyAccessor" /> is null. -or-One or more elements of <paramref name="initializers" /> are null.</exception>
118 ///<exception cref="T:System.ArgumentException">
119 ///<paramref name="propertyAccessor" /> does not represent a property accessor method.-or-The <see cref="P:System.Reflection.PropertyInfo.PropertyType" /> of the property that the method represented by <paramref name="propertyAccessor" /> accesses does not implement <see cref="T:System.Collections.IEnumerable" />.</exception>
120 public static MemberListBinding ListBind(MethodInfo propertyAccessor, IEnumerable<ElementInit> initializers) {
121 ContractUtils.RequiresNotNull(propertyAccessor, "propertyAccessor");
122 ContractUtils.RequiresNotNull(initializers, "initializers");
123 return ListBind(GetProperty(propertyAccessor), initializers);
126 private static void ValidateListInitArgs(Type listType, ReadOnlyCollection<ElementInit> initializers) {
127 if (!typeof(IEnumerable).IsAssignableFrom(listType)) {
128 throw Error.TypeNotIEnumerable(listType);
130 for (int i = 0, n = initializers.Count; i < n; i++) {
131 ElementInit element = initializers[i];
132 ContractUtils.RequiresNotNull(element, "initializers");
133 ValidateCallInstanceType(listType, element.AddMethod);