UI 자동화를 위해 바인딩 기능 구현

- 유니티 에셋 인증 오류로 meta 재생성

Packages/com.unity.inputsystem/InputSystem/Editor/UITKAssetEditor/ExpressionUtils.cs

@@ -0,0 +1,56 @@
+#if UNITY_EDITOR
+using System;
+using System.Linq.Expressions;
+using System.Reflection;
+
+namespace UnityEngine.InputSystem.Editor
+{
+    internal static class ExpressionUtils
+    {
+        public static PropertyInfo GetProperty<TEntity, TProperty>(Expression<Func<TEntity, TProperty>> expression)
+        {
+            var member = GetMemberExpression(expression).Member;
+            var property = member as PropertyInfo;
+            if (property == null)
+                throw new InvalidOperationException($"Member with Name '{member.Name}' is not a property.");
+
+            return property;
+        }
+
+        private static MemberExpression GetMemberExpression<TEntity, TProperty>(Expression<Func<TEntity, TProperty>> expression)
+        {
+            MemberExpression memberExpression = null;
+            switch (expression.Body.NodeType)
+            {
+                case ExpressionType.Convert:
+                {
+                    var body = (UnaryExpression)expression.Body;
+                    memberExpression = body.Operand as MemberExpression;
+                    break;
+                }
+                case ExpressionType.MemberAccess:
+                    memberExpression = expression.Body as MemberExpression;
+                    break;
+            }
+
+            if (memberExpression == null)
+                throw new ArgumentException("Not a member access", nameof(expression));
+
+            return memberExpression;
+        }
+
+        public static Func<TEntity, TProperty> CreateGetter<TEntity, TProperty>(Expression<Func<TEntity, TProperty>> property)
+        {
+            var propertyInfo = GetProperty(property);
+
+            var instance = Expression.Parameter(typeof(TEntity), "instance");
+
+            var body = Expression.Call(instance, propertyInfo.GetGetMethod());
+            var parameters = new[] { instance };
+
+            return Expression.Lambda<Func<TEntity, TProperty>>(body, parameters).Compile();
+        }
+    }
+}
+
+#endif