feat: manually mirror opencoze's code from bytedance

Change-Id: I09a73aadda978ad9511264a756b2ce51f5761adf

backend/pkg/lang/ptr/ptr.go

@@ -0,0 +1,36 @@
+/*
+ * Copyright 2025 coze-dev Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package ptr
+
+func Of[T any](t T) *T {
+	return &t
+}
+
+func From[T any](p *T) T {
+	if p != nil {
+		return *p
+	}
+	var t T
+	return t
+}
+
+func FromOrDefault[T any](p *T, def T) T {
+	if p != nil {
+		return *p
+	}
+	return def
+}