netcore/System.Private.CoreLib/shared/System/Reflection/CustomAttributeNamedArgument.cs

   1 // Licensed to the .NET Foundation under one or more agreements.
   2 // The .NET Foundation licenses this file to you under the MIT license.
   3 // See the LICENSE file in the project root for more information.
   4
   5 namespace System.Reflection
   6 {
   7     public readonly partial struct CustomAttributeNamedArgument
   8     {
   9         public static bool operator ==(CustomAttributeNamedArgument left, CustomAttributeNamedArgument right) => left.Equals(right);
  10         public static bool operator !=(CustomAttributeNamedArgument left, CustomAttributeNamedArgument right) => !left.Equals(right);
  11
  12         private readonly MemberInfo m_memberInfo;
  13         private readonly CustomAttributeTypedArgument m_value;
  14
  15         public CustomAttributeNamedArgument(MemberInfo memberInfo, object? value)
  16         {
  17             if (memberInfo == null)
  18                 throw new ArgumentNullException(nameof(memberInfo));
  19
  20             Type type;
  21             if (memberInfo is FieldInfo field)
  22             {
  23                 type = field.FieldType;
  24             }
  25             else if (memberInfo is PropertyInfo property)
  26             {
  27                 type = property.PropertyType;
  28             }
  29             else
  30             {
  31                 throw new ArgumentException(SR.Argument_InvalidMemberForNamedArgument);
  32             }
  33
  34             m_memberInfo = memberInfo;
  35             m_value = new CustomAttributeTypedArgument(type, value);
  36         }
  37
  38         public CustomAttributeNamedArgument(MemberInfo memberInfo, CustomAttributeTypedArgument typedArgument)
  39         {
  40             if (memberInfo == null)
  41                 throw new ArgumentNullException(nameof(memberInfo));
  42
  43             m_memberInfo = memberInfo;
  44             m_value = typedArgument;
  45         }
  46
  47         public override string ToString()
  48         {
  49             if (m_memberInfo == null)
  50                 return base.ToString()!;
  51
  52             return string.Format("{0} = {1}", MemberInfo.Name, TypedValue.ToString(ArgumentType != typeof(object)));
  53         }
  54
  55         public override int GetHashCode()
  56         {
  57             return base.GetHashCode();
  58         }
  59
  60         public override bool Equals(object? obj)
  61         {
  62             return obj == (object)this;
  63         }
  64
  65         internal Type ArgumentType =>
  66             m_memberInfo is FieldInfo ?
  67                 ((FieldInfo)m_memberInfo).FieldType :
  68                 ((PropertyInfo)m_memberInfo).PropertyType;
  69
  70         public MemberInfo MemberInfo => m_memberInfo;
  71         public CustomAttributeTypedArgument TypedValue => m_value;
  72         public string MemberName => MemberInfo.Name;
  73         public bool IsField => MemberInfo is FieldInfo;
  74     }
  75 }