fp-go/internal/functor/functor.go

// Copyright (c) 2023 IBM Corp.
// All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package functor

import (
	F "github.com/IBM/fp-go/function"
)

// HKTFGA = HKT[F, HKT[G, A]]
// HKTFGB = HKT[F, HKT[G, B]]
func MonadMap[A, B, HKTGA, HKTGB, HKTFGA, HKTFGB any](fmap func(HKTFGA, func(HKTGA) HKTGB) HKTFGB, gmap func(HKTGA, func(A) B) HKTGB, fa HKTFGA, f func(A) B) HKTFGB {
	return fmap(fa, F.Bind2nd(gmap, f))
}