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/* ****************************************************************************
*
* Copyright (c) Microsoft Corporation.
*
* This source code is subject to terms and conditions of the Apache License, Version 2.0. A
* copy of the license can be found in the License.html file at the root of this distribution. If
* you cannot locate the Apache License, Version 2.0, please send an email to
* dlr@microsoft.com. By using this source code in any fashion, you are agreeing to be bound
* by the terms of the Apache License, Version 2.0.
*
* You must not remove this notice, or any other, from this software.
*
*
* ***************************************************************************/
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Dynamic.Utils;
using System.Reflection;
#if !FEATURE_CORE_DLR
namespace Microsoft.Scripting.Ast {
#else
namespace System.Linq.Expressions {
#endif
/// <summary>
/// Represents initializing members of a member of a newly created object.
/// </summary>
/// <remarks>
/// Use the <see cref="M:MemberBind"/> factory methods to create a <see cref="MemberMemberBinding"/>.
/// The value of the <see cref="P:MemberBinding.BindingType"/> property of a <see cref="MemberMemberBinding"/> object is <see cref="MemberBinding"/>.
/// </remarks>
public sealed class MemberMemberBinding : MemberBinding {
ReadOnlyCollection<MemberBinding> _bindings;
internal MemberMemberBinding(MemberInfo member, ReadOnlyCollection<MemberBinding> bindings)
#pragma warning disable 618
: base(MemberBindingType.MemberBinding, member) {
#pragma warning restore 618
_bindings = bindings;
}
/// <summary>
/// Gets the bindings that describe how to initialize the members of a member.
/// </summary>
public ReadOnlyCollection<MemberBinding> Bindings {
get { return _bindings; }
}
/// <summary>
/// Creates a new expression that is like this one, but using the
/// supplied children. If all of the children are the same, it will
/// return this expression.
/// </summary>
/// <param name="bindings">The <see cref="Bindings" /> property of the result.</param>
/// <returns>This expression if no children changed, or an expression with the updated children.</returns>
public MemberMemberBinding Update(IEnumerable<MemberBinding> bindings) {
if (bindings == Bindings) {
return this;
}
return Expression.MemberBind(Member, bindings);
}
}
public partial class Expression {
/// <summary>
/// Creates a <see cref="MemberMemberBinding"/> that represents the recursive initialization of members of a field or property.
/// </summary>
/// <param name="member">The <see cref="MemberInfo"/> to set the <see cref="P:MemberBinding.Member"/> property equal to.</param>
/// <param name="bindings">An array of <see cref="MemberBinding"/> objects to use to populate the <see cref="P:MemberMemberBindings.Bindings"/> collection.</param>
/// <returns>A <see cref="MemberMemberBinding"/> that has the <see cref="P:MemberBinding.BindingType"/> property equal to <see cref="MemberBinding"/> and the <see cref="P:MemberBinding.Member"/> and <see cref="P:MemberMemberBindings.Bindings"/> properties set to the specified values.</returns>
public static MemberMemberBinding MemberBind(MemberInfo member, params MemberBinding[] bindings) {
ContractUtils.RequiresNotNull(member, "member");
ContractUtils.RequiresNotNull(bindings, "bindings");
return MemberBind(member, (IEnumerable<MemberBinding>)bindings);
}
/// <summary>
/// Creates a <see cref="MemberMemberBinding"/> that represents the recursive initialization of members of a field or property.
/// </summary>
/// <param name="member">The <see cref="MemberInfo"/> to set the <see cref="P:MemberBinding.Member"/> property equal to.</param>
/// <param name="bindings">An <see cref="IEnumerable{T}"/> that contains <see cref="MemberBinding"/> objects to use to populate the <see cref="P:MemberMemberBindings.Bindings"/> collection.</param>
/// <returns>A <see cref="MemberMemberBinding"/> that has the <see cref="P:MemberBinding.BindingType"/> property equal to <see cref="MemberBinding"/> and the <see cref="P:MemberBinding.Member"/> and <see cref="P:MemberMemberBindings.Bindings"/> properties set to the specified values.</returns>
public static MemberMemberBinding MemberBind(MemberInfo member, IEnumerable<MemberBinding> bindings) {
ContractUtils.RequiresNotNull(member, "member");
ContractUtils.RequiresNotNull(bindings, "bindings");
ReadOnlyCollection<MemberBinding> roBindings = bindings.ToReadOnly();
Type memberType;
ValidateGettableFieldOrPropertyMember(member, out memberType);
ValidateMemberInitArgs(memberType, roBindings);
return new MemberMemberBinding(member, roBindings);
}
/// <summary>
/// Creates a <see cref="MemberMemberBinding"/> that represents the recursive initialization of members of a member that is accessed by using a property accessor method.
/// </summary>
/// <param name="propertyAccessor">The <see cref="MemberInfo"/> that represents a property accessor method.</param>
/// <param name="bindings">An <see cref="IEnumerable{T}"/> that contains <see cref="MemberBinding"/> objects to use to populate the <see cref="P:MemberMemberBindings.Bindings"/> collection.</param>
/// <returns>
/// A <see cref="MemberMemberBinding"/> that has the <see cref="P:MemberBinding.BindingType"/> property equal to <see cref="MemberBinding"/>,
/// the Member property set to the <see cref="PropertyInfo"/> that represents the property accessed in <paramref name="propertyAccessor"/>,
/// and <see cref="P:MemberMemberBindings.Bindings"/> properties set to the specified values.
/// </returns>
public static MemberMemberBinding MemberBind(MethodInfo propertyAccessor, params MemberBinding[] bindings) {
ContractUtils.RequiresNotNull(propertyAccessor, "propertyAccessor");
return MemberBind(GetProperty(propertyAccessor), bindings);
}
/// <summary>
/// Creates a <see cref="MemberMemberBinding"/> that represents the recursive initialization of members of a member that is accessed by using a property accessor method.
/// </summary>
/// <param name="propertyAccessor">The <see cref="MemberInfo"/> that represents a property accessor method.</param>
/// <param name="bindings">An <see cref="IEnumerable{T}"/> that contains <see cref="MemberBinding"/> objects to use to populate the <see cref="P:MemberMemberBindings.Bindings"/> collection.</param>
/// <returns>
/// A <see cref="MemberMemberBinding"/> that has the <see cref="P:MemberBinding.BindingType"/> property equal to <see cref="MemberBinding"/>,
/// the Member property set to the <see cref="PropertyInfo"/> that represents the property accessed in <paramref name="propertyAccessor"/>,
/// and <see cref="P:MemberMemberBindings.Bindings"/> properties set to the specified values.
/// </returns>
public static MemberMemberBinding MemberBind(MethodInfo propertyAccessor, IEnumerable<MemberBinding> bindings) {
ContractUtils.RequiresNotNull(propertyAccessor, "propertyAccessor");
return MemberBind(GetProperty(propertyAccessor), bindings);
}
private static void ValidateGettableFieldOrPropertyMember(MemberInfo member, out Type memberType) {
FieldInfo fi = member as FieldInfo;
if (fi == null) {
PropertyInfo pi = member as PropertyInfo;
if (pi == null) {
throw Error.ArgumentMustBeFieldInfoOrPropertInfo();
}
if (!pi.CanRead) {
throw Error.PropertyDoesNotHaveGetter(pi);
}
memberType = pi.PropertyType;
} else {
memberType = fi.FieldType;
}
}
private static void ValidateMemberInitArgs(Type type, ReadOnlyCollection<MemberBinding> bindings) {
for (int i = 0, n = bindings.Count; i < n; i++) {
MemberBinding b = bindings[i];
ContractUtils.RequiresNotNull(b, "bindings");
if (!b.Member.DeclaringType.IsAssignableFrom(type)) {
throw Error.NotAMemberOfType(b.Member.Name, type);
}
}
}
}
}
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