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fp-go/ioeither/generic/bracket.go
Dr. Carsten Leue 5020437b6a fix: add ioeither
Signed-off-by: Dr. Carsten Leue <carsten.leue@de.ibm.com>
2023-07-14 17:30:58 +02:00

32 lines
761 B
Go

package generic
import (
ET "github.com/ibm/fp-go/either"
G "github.com/ibm/fp-go/internal/file"
I "github.com/ibm/fp-go/io/generic"
)
// 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[
GA ~func() ET.Either[E, A],
GB ~func() ET.Either[E, B],
GANY ~func() ET.Either[E, ANY],
E, A, B, ANY any](
acquire GA,
use func(A) GB,
release func(A, ET.Either[E, B]) GANY,
) GB {
return G.Bracket[GA, GB, GANY, ET.Either[E, B], A, B](
I.Of[GB, ET.Either[E, B]],
MonadChain[GA, GB, E, A, B],
I.MonadChain[GB, GB, ET.Either[E, B], ET.Either[E, B]],
MonadChain[GANY, GB, E, ANY, B],
acquire,
use,
release,
)
}