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46 lines
1.6 KiB
Go
46 lines
1.6 KiB
Go
// Copyright (c) 2024 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 generic
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import (
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"github.com/IBM/fp-go/internal/monad"
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O "github.com/IBM/fp-go/option"
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T "github.com/IBM/fp-go/tuple"
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)
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type iteratorMonad[A, B any, GA ~func() O.Option[T.Tuple2[GA, A]], GB ~func() O.Option[T.Tuple2[GB, B]], GAB ~func() O.Option[T.Tuple2[GAB, func(A) B]]] struct{}
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func (o *iteratorMonad[A, B, GA, GB, GAB]) Of(a A) GA {
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return Of[GA, A](a)
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}
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func (o *iteratorMonad[A, B, GA, GB, GAB]) Map(f func(A) B) func(GA) GB {
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return Map[GB, GA, func(A) B, A, B](f)
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}
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func (o *iteratorMonad[A, B, GA, GB, GAB]) Chain(f func(A) GB) func(GA) GB {
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return Chain[GB, GA, A, B](f)
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}
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func (o *iteratorMonad[A, B, GA, GB, GAB]) Ap(fa GA) func(GAB) GB {
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return Ap[GAB, GB, GA, A, B](fa)
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}
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// Monad implements the monadic operations for iterators
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func Monad[A, B any, GA ~func() O.Option[T.Tuple2[GA, A]], GB ~func() O.Option[T.Tuple2[GB, B]], GAB ~func() O.Option[T.Tuple2[GAB, func(A) B]]]() monad.Monad[A, B, GA, GB, GAB] {
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return &iteratorMonad[A, B, GA, GB, GAB]{}
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}
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