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35 lines
960 B
Go
35 lines
960 B
Go
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// Copyright (c) 2023 - 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 either
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//go:inline
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func TailRec[E, A, B any](f Kleisli[E, A, Either[A, B]]) Kleisli[E, A, B] {
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return func(a A) Either[E, B] {
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current := f(a)
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for {
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rec, e := Unwrap(current)
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if IsLeft(current) {
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return Left[B](e)
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}
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b, a := Unwrap(rec)
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if IsRight(rec) {
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return Right[E](b)
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}
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current = f(a)
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}
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}
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}
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