pkg/util/ptr/ptr.go

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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

import "fmt"

func Of[T any](t T) *T {
	return &t
}

func Empty[T any]() T {
	var empty T
	return empty
}

func Flatten[T any](t **T) *T {
	if t == nil {
		return nil
	}
	return *t
}

func TypeName[T any]() string {
	var empty T
	return fmt.Sprintf("%T", empty)
}

func Equal[T comparable](a, b *T) bool {
	if (a == nil) != (b == nil) {
		return false
	}
	if a == nil {
		return true
	}
	return *a == *b
}

func NonEmptyOrDefault[T comparable](t T, def T) T {
	var empty T
	if t != empty {
		return t
	}
	return def
}