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69 lines
2.3 KiB
Go
69 lines
2.3 KiB
Go
// Copyright (c) 2023 IBM Corp.
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// All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package writer
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import (
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M "github.com/IBM/fp-go/monoid"
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SG "github.com/IBM/fp-go/semigroup"
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G "github.com/IBM/fp-go/writer/generic"
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)
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// Bind creates an empty context of type [S] to be used with the [Bind] operation
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func Do[S, W any](m M.Monoid[W], s S) Writer[W, S] {
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return G.Do[Writer[W, S], W, S](m, s)
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}
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// Bind attaches the result of a computation to a context [S1] to produce a context [S2]
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func Bind[S1, S2, T, W any](
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s SG.Semigroup[W],
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setter func(T) func(S1) S2,
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f func(S1) Writer[W, T],
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) func(Writer[W, S1]) Writer[W, S2] {
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return G.Bind[Writer[W, S1], Writer[W, S2], Writer[W, T], W, S1, S2, T](s, setter, f)
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}
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// Let attaches the result of a computation to a context [S1] to produce a context [S2]
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func Let[W, S1, S2, T any](
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setter func(T) func(S1) S2,
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f func(S1) T,
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) func(Writer[W, S1]) Writer[W, S2] {
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return G.Let[Writer[W, S1], Writer[W, S2], W, S1, S2, T](setter, f)
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}
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// LetTo attaches the a value to a context [S1] to produce a context [S2]
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func LetTo[W, S1, S2, T any](
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setter func(T) func(S1) S2,
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b T,
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) func(Writer[W, S1]) Writer[W, S2] {
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return G.LetTo[Writer[W, S1], Writer[W, S2], W, S1, S2, T](setter, b)
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}
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// BindTo initializes a new state [S1] from a value [T]
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func BindTo[W, S1, T any](
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setter func(T) S1,
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) func(Writer[W, T]) Writer[W, S1] {
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return G.BindTo[Writer[W, S1], Writer[W, T], W, S1, T](setter)
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}
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// ApS attaches a value to a context [S1] to produce a context [S2] by considering the context and the value concurrently
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func ApS[S1, S2, T, W any](
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s SG.Semigroup[W],
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setter func(T) func(S1) S2,
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fa Writer[W, T],
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) func(Writer[W, S1]) Writer[W, S2] {
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return G.ApS[Writer[W, S1], Writer[W, S2], Writer[W, T], W, S1, S2, T](s, setter, fa)
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}
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