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88 lines
2.5 KiB
Go
88 lines
2.5 KiB
Go
// Copyright (c) 2024 - 2025 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 state
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import (
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"github.com/IBM/fp-go/v2/internal/applicative"
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"github.com/IBM/fp-go/v2/internal/functor"
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"github.com/IBM/fp-go/v2/internal/monad"
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"github.com/IBM/fp-go/v2/internal/pointed"
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)
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type statePointed[S, A any] struct{}
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type stateFunctor[S, A, B any] struct{}
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type stateApplicative[S, A, B any] struct{}
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type stateMonad[S, A, B any] struct{}
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func (o *statePointed[S, A]) Of(a A) State[S, A] {
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return Of[S](a)
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}
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func (o *stateApplicative[S, A, B]) Of(a A) State[S, A] {
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return Of[S](a)
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}
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func (o *stateMonad[S, A, B]) Of(a A) State[S, A] {
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return Of[S](a)
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}
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func (o *stateFunctor[S, A, B]) Map(f func(A) B) Operator[S, A, B] {
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return Map[S](f)
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}
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func (o *stateApplicative[S, A, B]) Map(f func(A) B) Operator[S, A, B] {
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return Map[S](f)
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}
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func (o *stateMonad[S, A, B]) Map(f func(A) B) Operator[S, A, B] {
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return Map[S](f)
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}
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func (o *stateMonad[S, A, B]) Chain(f Kleisli[S, A, B]) Operator[S, A, B] {
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return Chain(f)
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}
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func (o *stateApplicative[S, A, B]) Ap(fa State[S, A]) func(State[S, func(A) B]) State[S, B] {
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return Ap[B](fa)
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}
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func (o *stateMonad[S, A, B]) Ap(fa State[S, A]) func(State[S, func(A) B]) State[S, B] {
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return Ap[B](fa)
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}
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// Pointed implements the pointed operations for [State]
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func Pointed[S, A any]() pointed.Pointed[A, State[S, A]] {
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return &statePointed[S, A]{}
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}
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// Functor implements the functor operations for [State]
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func Functor[S, A, B any]() functor.Functor[A, B, State[S, A], State[S, B]] {
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return &stateFunctor[S, A, B]{}
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}
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// Applicative implements the applicative operations for [State]
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func Applicative[S, A, B any]() applicative.Applicative[A, B, State[S, A], State[S, B], State[S, func(A) B]] {
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return &stateApplicative[S, A, B]{}
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}
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// Monad implements the monadic operations for [State]
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func Monad[S, A, B any]() monad.Monad[A, B, State[S, A], State[S, B], State[S, func(A) B]] {
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return &stateMonad[S, A, B]{}
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}
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