CustomAttributeNamedArgument.cs

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namespace System.Reflection;
 
public readonly struct CustomAttributeNamedArgument
{
    private readonly MemberInfo _memberInfo;
 
    private readonly CustomAttributeTypedArgument _value;
 
    internal Type ArgumentType
    {
        get
        {
            if (!(_memberInfo is FieldInfo fieldInfo))
            {
                return ((PropertyInfo)_memberInfo).PropertyType;
            }
            return fieldInfo.FieldType;
        }
    }
 
    public MemberInfo MemberInfo => _memberInfo;
 
    public CustomAttributeTypedArgument TypedValue => _value;
 
    public string MemberName => MemberInfo.Name;
 
    public bool IsField => MemberInfo is FieldInfo;
 
    public static bool operator ==(CustomAttributeNamedArgument left, CustomAttributeNamedArgument right)
    {
        return left.Equals(right);
    }
 
    public static bool operator !=(CustomAttributeNamedArgument left, CustomAttributeNamedArgument right)
    {
        return !left.Equals(right);
    }
 
    public CustomAttributeNamedArgument(MemberInfo memberInfo, object? value)
    {
        if ((object)memberInfo == null)
        {
            throw new ArgumentNullException("memberInfo");
        }
        Type type;
        if (!(memberInfo is FieldInfo fieldInfo))
        {
            if (!(memberInfo is PropertyInfo propertyInfo))
            {
                throw new ArgumentException(SR.Argument_InvalidMemberForNamedArgument);
            }
            type = propertyInfo.PropertyType;
        }
        else
        {
            type = fieldInfo.FieldType;
        }
        Type argumentType = type;
        _memberInfo = memberInfo;
        _value = new CustomAttributeTypedArgument(argumentType, value);
    }
 
    public CustomAttributeNamedArgument(MemberInfo memberInfo, CustomAttributeTypedArgument typedArgument)
    {
        _memberInfo = memberInfo ?? throw new ArgumentNullException("memberInfo");
        _value = typedArgument;
    }
 
    public override string ToString()
    {
        if ((object)_memberInfo == null)
        {
            return base.ToString();
        }
        return MemberInfo.Name + " = " + TypedValue.ToString(ArgumentType != typeof(object));
    }
 
    public override int GetHashCode()
    {
        return base.GetHashCode();
    }
 
    public override bool Equals(object? obj)
    {
        return obj == (object)this;
    }
}