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38 lines
737 B
Go
38 lines
737 B
Go
package file
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import (
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F "github.com/IBM/fp-go/function"
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)
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// Bracket makes sure that a resource is cleaned up in the event of an error. The release action is called regardless of
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// whether the body action returns and error or not.
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func Bracket[
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GA, // IOEither[E, A]
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GB, // IOEither[E, A]
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GANY, // IOEither[E, ANY]
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EB, // Either[E, B]
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A, B, ANY any](
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ofeb func(EB) GB,
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chainab func(GA, func(A) GB) GB,
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chainebb func(GB, func(EB) GB) GB,
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chainany func(GANY, func(ANY) GB) GB,
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acquire GA,
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use func(A) GB,
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release func(A, EB) GANY,
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) GB {
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return chainab(acquire,
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func(a A) GB {
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return chainebb(use(a), func(eb EB) GB {
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return chainany(
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release(a, eb),
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F.Constant1[ANY](ofeb(eb)),
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)
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})
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})
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}
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