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31 lines
1013 B
Go
31 lines
1013 B
Go
package either
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import (
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F "github.com/ibm/fp-go/function"
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RR "github.com/ibm/fp-go/internal/record"
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)
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// TraverseRecord transforms a record of options into an option of a record
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func TraverseRecordG[GA ~map[K]A, GB ~map[K]B, K comparable, E, A, B any](f func(A) Either[E, B]) func(GA) Either[E, GB] {
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return RR.Traverse[GA](
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Of[E, GB],
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Map[E, GB, func(B) GB],
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Ap[GB, E, B],
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f,
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)
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}
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// TraverseRecord transforms a record of eithers into an either of a record
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func TraverseRecord[K comparable, E, A, B any](f func(A) Either[E, B]) func(map[K]A) Either[E, map[K]B] {
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return TraverseRecordG[map[K]A, map[K]B](f)
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}
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func SequenceRecordG[GA ~map[K]A, GOA ~map[K]Either[E, A], K comparable, E, A any](ma GOA) Either[E, GA] {
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return TraverseRecordG[GOA, GA](F.Identity[Either[E, A]])(ma)
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}
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// SequenceRecord converts a homogeneous sequence of either into an either of sequence
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func SequenceRecord[K comparable, E, A any](ma map[K]Either[E, A]) Either[E, map[K]A] {
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return SequenceRecordG[map[K]A](ma)
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}
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