// internal sealed class OverrideMetadataAttribute : global::System.Attribute
// ... 省略

[global::System.AttributeUsage(global::System.AttributeTargets.Class, AllowMultiple = true)]
[global::System.Diagnostics.Conditional("DEPENDENCY_PROPERTY_GENERATOR_ATTRIBUTES")]
internal sealed class OverrideMetadataAttribute<T> : global::System.Attribute
{
    /// <summary>
    /// Name of this dependency property.
    /// </summary>
	public string Name { get; }

    /// <summary>
    /// Type of this dependency property.
    /// </summary>
    public global::System.Type Type { get; }

    /// <summary>
    /// Default value of this dependency property. <br/>
    /// If you need to pass a new() expression, use <see cref="DefaultValueExpression"/>. <br/>
    /// Default - <see langword="default(type)"/>.
    /// </summary>
    public object? DefaultValue { get; set; }

    /// <summary>
    /// Default value expression of this dependency property. <br/>
    /// Used to pass a new() expression to an initializer. <br/>
    /// Default - <see langword="null"/>.
    /// </summary>
    public string? DefaultValueExpression { get; set; }

    /// <summary>
    /// For values other than default(type), will bind/rebind/remove the 
    /// On{Name}Changed_{EventName}(object sender, Args args) handler for the specified event. <br/>
    /// It is recommended to specify as nameof(Control.SomeEvent) or another Avalonia event name. <br/>
    /// Default - string.Empty.
    /// </summary>
    public string BindEvent { get; set; } = string.Empty;

    /// <summary>
    /// For values other than default(type), will bind/rebind/remove the 
    /// On{Name}Changed_{EventName}(object sender, Args args) handler for the specified event. <br/>
    /// It is recommended to specify as nameof(Control.SomeEvent) or another Avalonia event name. <br/>
    /// Default - <see langword="null"/>.
    /// </summary>
    public string[]? BindEvents { get; set; }

    /// <summary>
    /// Allows to set a custom name for the OnChanged method call, allowing this method to be non-partial.
    /// </summary>
    public string OnChanged { get; set; } = string.Empty;

    /// <summary>
    /// Avalonia: Default BindingMode. <br/>
    /// Default - <see cref="DefaultBindingMode.Default"/>.
    /// </summary>
    public DefaultBindingMode DefaultBindingMode { get; set; } = DefaultBindingMode.Default;

    /// <summary>
    /// Avalonia: partial method for coerce callback will be created for styled or attached properties.
    /// </summary>
    public bool Coerce { get; set; }

    /// <summary>
    /// 
    /// </summary>
    /// <param name="name"></param>
    /// <exception cref="global::System.ArgumentNullException"></exception>
    public OverrideMetadataAttribute(
        string name)
    {
        Name = name ?? throw new global::System.ArgumentNullException(nameof(name));
        Type = typeof(T);
    }
}