fp-go/v2/io/bracket.go

// Copyright (c) 2023 - 2025 IBM Corp.
// All rights reserved.
//
// 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 io

import (
	INTB "github.com/IBM/fp-go/v2/internal/bracket"
)

// Bracket makes sure that a resource is cleaned up in the event of an error. The release action is called regardless of
// whether the body action returns and error or not.
func Bracket[A, B, ANY any](
	acquire IO[A],
	use Kleisli[A, B],
	release func(A, B) IO[ANY],
) IO[B] {
	return INTB.Bracket[IO[A], IO[B], IO[ANY], B, A, B](
		Of[B],
		MonadChain[A, B],
		MonadChain[B, B],
		MonadChain[ANY, B],

		acquire,
		use,
		release,
	)
}