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fix: refactor Writer monad

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Signed-off-by: Dr. Carsten Leue <carsten.leue@de.ibm.com>
This commit is contained in:
Dr. Carsten Leue
2024-02-13 10:44:57 +01:00
parent d0e4984b60
commit 01786a054b
10 changed files with 302 additions and 149 deletions
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11
writer/bind.go
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@@ -17,20 +17,22 @@ package writer
import (
M "github.com/IBM/fp-go/monoid"
SG "github.com/IBM/fp-go/semigroup"
G "github.com/IBM/fp-go/writer/generic"
)
// Bind creates an empty context of type [S] to be used with the [Bind] operation
func Do[S, W any](m M.Monoid[W]) func(S) Writer[W, S] {
return G.Do[Writer[W, S], W, S](m)
func Do[S, W any](m M.Monoid[W], s S) Writer[W, S] {
return G.Do[Writer[W, S], W, S](m, s)
}
// Bind attaches the result of a computation to a context [S1] to produce a context [S2]
func Bind[S1, S2, T, W any](
s SG.Semigroup[W],
setter func(T) func(S1) S2,
f func(S1) Writer[W, T],
) func(Writer[W, S1]) Writer[W, S2] {
return G.Bind[Writer[W, S1], Writer[W, S2], Writer[W, T], W, S1, S2, T](setter, f)
return G.Bind[Writer[W, S1], Writer[W, S2], Writer[W, T], W, S1, S2, T](s, setter, f)
}
// Let attaches the result of a computation to a context [S1] to produce a context [S2]
@@ -58,8 +60,9 @@ func BindTo[W, S1, T any](
// ApS attaches a value to a context [S1] to produce a context [S2] by considering the context and the value concurrently
func ApS[S1, S2, T, W any](
s SG.Semigroup[W],
setter func(T) func(S1) S2,
fa Writer[W, T],
) func(Writer[W, S1]) Writer[W, S2] {
return G.ApS[Writer[W, S1], Writer[W, S2], Writer[W, T], W, S1, S2, T](setter, fa)
return G.ApS[Writer[W, S1], Writer[W, S2], Writer[W, T], W, S1, S2, T](s, setter, fa)
}