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72 lines
2.1 KiB
Go
72 lines
2.1 KiB
Go
package fromeither
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import (
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ET "github.com/IBM/fp-go/either"
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F "github.com/IBM/fp-go/function"
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C "github.com/IBM/fp-go/internal/chain"
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O "github.com/IBM/fp-go/option"
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)
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func FromOption[E, A, HKTEA any](fromEither func(ET.Either[E, A]) HKTEA, onNone func() E) func(ma O.Option[A]) HKTEA {
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return F.Flow2(ET.FromOption[E, A](onNone), fromEither)
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}
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func FromPredicate[E, A, HKTEA any](fromEither func(ET.Either[E, A]) HKTEA, pred func(A) bool, onFalse func(A) E) func(A) HKTEA {
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return F.Flow2(ET.FromPredicate(pred, onFalse), fromEither)
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}
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func MonadFromOption[E, A, HKTEA any](
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fromEither func(ET.Either[E, A]) HKTEA,
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onNone func() E,
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ma O.Option[A],
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) HKTEA {
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return F.Pipe1(
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O.MonadFold(
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ma,
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F.Nullary2(onNone, ET.Left[A, E]),
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ET.Right[E, A],
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),
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fromEither,
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)
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}
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func FromOptionK[E, A, B, HKTEB any](
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fromEither func(ET.Either[E, B]) HKTEB,
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onNone func() E) func(f func(A) O.Option[B]) func(A) HKTEB {
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// helper
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return F.Bind2nd(F.Flow2[func(A) O.Option[B], func(O.Option[B]) HKTEB, A, O.Option[B], HKTEB], FromOption(fromEither, onNone))
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}
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func MonadChainEitherK[A, E, B, HKTEA, HKTEB any](
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mchain func(HKTEA, func(A) HKTEB) HKTEB,
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fromEither func(ET.Either[E, B]) HKTEB,
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ma HKTEA,
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f func(A) ET.Either[E, B]) HKTEB {
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return mchain(ma, F.Flow2(f, fromEither))
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}
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func ChainOptionK[A, E, B, HKTEA, HKTEB any](
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mchain func(HKTEA, func(A) HKTEB) HKTEB,
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fromEither func(ET.Either[E, B]) HKTEB,
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onNone func() E,
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) func(f func(A) O.Option[B]) func(ma HKTEA) HKTEB {
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return F.Flow2(FromOptionK[E, A](fromEither, onNone), F.Bind1st(F.Bind2nd[HKTEA, func(A) HKTEB, HKTEB], mchain))
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}
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func MonadChainFirstEitherK[A, E, B, HKTEA, HKTEB any](
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mchain func(HKTEA, func(A) HKTEA) HKTEA,
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mmap func(HKTEB, func(B) A) HKTEA,
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fromEither func(ET.Either[E, B]) HKTEB,
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ma HKTEA,
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f func(A) ET.Either[E, B]) HKTEA {
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return C.MonadChainFirst(mchain, mmap, ma, F.Flow2(f, fromEither))
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}
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func ChainFirstEitherK[A, E, B, HKTEA, HKTEB any](
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mchain func(HKTEA, func(A) HKTEA) HKTEA,
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mmap func(HKTEB, func(B) A) HKTEA,
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fromEither func(ET.Either[E, B]) HKTEB,
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f func(A) ET.Either[E, B]) func(HKTEA) HKTEA {
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return C.ChainFirst(mchain, mmap, F.Flow2(f, fromEither))
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}
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