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* fix: implement bind, let, apS for serveral monads Signed-off-by: Dr. Carsten Leue <carsten.leue@de.ibm.com> * fix: implement bind for maps Signed-off-by: Dr. Carsten Leue <carsten.leue@de.ibm.com> * fix: implement do notation for more monads Signed-off-by: Dr. Carsten Leue <carsten.leue@de.ibm.com> * fix: add bind to more monads Signed-off-by: Dr. Carsten Leue <carsten.leue@de.ibm.com> * fix: add Do and Bind support to Monads Signed-off-by: Dr. Carsten Leue <carsten.leue@de.ibm.com> --------- Signed-off-by: Dr. Carsten Leue <carsten.leue@de.ibm.com>
58 lines
2.1 KiB
Go
58 lines
2.1 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 record
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import (
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Mo "github.com/IBM/fp-go/monoid"
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G "github.com/IBM/fp-go/record/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[K comparable, S any]() map[K]S {
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return G.Do[map[K]S, K, 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, T any, K comparable, S2 any](m Mo.Monoid[map[K]S2]) func(setter func(T) func(S1) S2, f func(S1) map[K]T) func(map[K]S1) map[K]S2 {
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return G.Bind[map[K]S1, map[K]S2, map[K]T, K, S1, S2, T](m)
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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[S1, T any, K comparable, S2 any](
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setter func(T) func(S1) S2,
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f func(S1) T,
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) func(map[K]S1) map[K]S2 {
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return G.Let[map[K]S1, map[K]S2, K, 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[S1, T any, K comparable, S2 any](
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setter func(T) func(S1) S2,
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b T,
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) func(map[K]S1) map[K]S2 {
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return G.LetTo[map[K]S1, map[K]S2, K, 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[S1, T any, K comparable](setter func(T) S1) func(map[K]T) map[K]S1 {
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return G.BindTo[map[K]S1, map[K]T, K, 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, T any, K comparable, S2 any](m Mo.Monoid[map[K]S2]) func(setter func(T) func(S1) S2, fa map[K]T) func(map[K]S1) map[K]S2 {
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return G.ApS[map[K]S1, map[K]S2, map[K]T, K, S1, S2, T](m)
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}
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