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76 lines
1.9 KiB
Go
76 lines
1.9 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 bindt
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import (
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F "github.com/IBM/fp-go/function"
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I "github.com/IBM/fp-go/identity"
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T "github.com/IBM/fp-go/tuple"
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)
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func Bind[SET ~func(B) func(S1) S2, FCT ~func(S1) HKTB, S1, S2, B, HKTS1, HKTS2, HKTB any](
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mchain func(func(S1) HKTS2) func(HKTS1) HKTS2,
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mmap func(func(B) S2) func(HKTB) HKTS2,
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s SET,
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f FCT,
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) func(HKTS1) HKTS2 {
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return mchain(F.Flow3(
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T.Replicate2[S1],
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T.Map2(F.Flow2(
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I.Ap[S2, S1],
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F.Flow2(
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F.Bind1st(F.Flow2[SET, func(func(S1) S2) S2], s),
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mmap,
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)), f),
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T.Tupled2(I.MonadAp[HKTS2, HKTB]),
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))
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}
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func BindTo[SET ~func(B) S2, S2, B, HKTS2, HKTB any](
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mmap func(func(B) S2) func(HKTB) HKTS2,
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s SET,
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) func(HKTB) HKTS2 {
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return mmap(s)
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}
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func ApS[
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SET ~func(B) func(S1) S2,
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S1, S2, B, HKTS1S2, HKTS1, HKTS2, HKTB any,
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](
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ap func(HKTS1) func(HKTS1S2) HKTS2,
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mmap func(func(B) func(S1) S2) func(HKTB) HKTS1S2,
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s SET, fb HKTB) func(HKTS1) HKTS2 {
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return F.Flow2(
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ap,
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I.Ap[HKTS2, HKTS1S2](mmap(s)(fb)),
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)
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}
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func Let[SET ~func(B) func(S1) S2, FCT ~func(S1) B, S1, S2, B, HKTS1, HKTS2 any](
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mmap func(func(S1) S2) func(HKTS1) HKTS2,
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s SET,
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f FCT,
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) func(HKTS1) HKTS2 {
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return mmap(F.Flow3(
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T.Replicate2[S1],
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T.Map2(F.Flow2(
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I.Ap[S2, S1],
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F.Bind1st(F.Flow2[SET, func(func(S1) S2) S2], s)), f),
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T.Tupled2(I.MonadAp[S2, B]),
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))
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}
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