Property attribute / drawer

GetSetAttribute.cs

using UnityEngine;

/// <summary>
/// Allows the use of C# property as inspector values in Unity.
/// </summary>
/// <example>
/// <code>
/// [SerializeField, GetSet("SomeFloat")]
/// private float _someFloat;
/// public float SomeFloat
/// {
///     get { return _someFloat; }
///     private set { _someFloat = value; }
/// }
/// </code>
/// </example>
public sealed class GetSetAttribute : PropertyAttribute
{
    public readonly string Name;
    public bool IsDirty;

    public GetSetAttribute(string name)
    {
        Name = name;
    }
}

GetSetDrawer.cs

using UnityEngine;
using UnityEditor;
using System;
using System.Reflection;

[CustomPropertyDrawer(typeof(GetSetAttribute))]
internal sealed class GetSetDrawer : PropertyDrawer
{
    public override void OnGUI(Rect position, SerializedProperty property, GUIContent label)
    {
        var attribute = (GetSetAttribute)base.attribute;

        EditorGUI.BeginChangeCheck();
        EditorGUI.PropertyField(position, property, label);

        if (EditorGUI.EndChangeCheck())
        {
            attribute.IsDirty = true;
        }
        else if (attribute.IsDirty)
        {
            object parent = GetParentObject(property.propertyPath, property.serializedObject.targetObject);

            var type = parent.GetType();
            var info = type.GetProperty(attribute.Name);

            if (info == null)
                Debug.LogError("Invalid property name \"" + attribute.Name + "\"");
            else
                info.SetValue(parent, fieldInfo.GetValue(parent), null);

            attribute.IsDirty = false;
        }
    }
    
    object GetParentObject(string path, object obj)
    {
        var fields = path.Split('.');

        if (fields.Length == 1)
            return obj;

        var info = obj.GetType().GetField(fields[0],
            BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);
        obj = info.GetValue(obj);

        return GetParentObject(string.Join(".", fields, 1, fields.Length - 1), obj);
    }
}