mirror of
https://github.com/IBM/fp-go.git
synced 2025-11-23 22:14:53 +02:00
40 lines
1.2 KiB
Go
40 lines
1.2 KiB
Go
// Copyright (c) 2024 - 2025 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 either
|
|
|
|
import (
|
|
"github.com/IBM/fp-go/v2/internal/functor"
|
|
)
|
|
|
|
type eitherFunctor[E, A, B any] struct{}
|
|
|
|
func (o *eitherFunctor[E, A, B]) Map(f func(A) B) Operator[E, A, B] {
|
|
return Map[E](f)
|
|
}
|
|
|
|
// Functor implements the functoric operations for Either.
|
|
// A functor provides the Map operation that transforms values inside a context
|
|
// while preserving the structure.
|
|
//
|
|
// Example:
|
|
//
|
|
// f := either.Functor[error, int, string]()
|
|
// result := f.Map(strconv.Itoa)(either.Right[error](42))
|
|
// // result is Right("42")
|
|
func Functor[E, A, B any]() functor.Functor[A, B, Either[E, A], Either[E, B]] {
|
|
return &eitherFunctor[E, A, B]{}
|
|
}
|