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43 lines
1.4 KiB
Go
43 lines
1.4 KiB
Go
// Copyright (c) 2023 - 2025 IBM Corp.
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// All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package io
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import (
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"github.com/IBM/fp-go/v2/function"
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)
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// WithResource constructs a function that creates a resource, operates on it, and then releases it.
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// This is a higher-level abstraction over Bracket that simplifies resource management patterns.
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//
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// The resource is guaranteed to be released even if the operation fails or panics.
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//
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// Example:
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//
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// withFile := io.WithResource(
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// io.Of(openFile("data.txt")),
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// func(f *os.File) io.IO[any] {
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// return io.FromImpure(func() { f.Close() })
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// },
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// )
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// result := withFile(func(f *os.File) io.IO[Data] {
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// return readData(f)
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// })
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func WithResource[
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R, A, ANY any](onCreate IO[R], onRelease func(R) IO[ANY]) Kleisli[Kleisli[R, A], A] {
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// simply map to implementation of bracket
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return function.Bind13of3(Bracket[R, A, ANY])(onCreate, function.Ignore2of2[A](onRelease))
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}
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