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35 lines
1.2 KiB
Go
35 lines
1.2 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 optional
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import (
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F "github.com/IBM/fp-go/function"
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L "github.com/IBM/fp-go/optics/lens"
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OPT "github.com/IBM/fp-go/optics/optional"
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O "github.com/IBM/fp-go/option"
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)
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func lensAsOptional[S, A any](creator func(get func(S) O.Option[A], set func(S, A) S) OPT.Optional[S, A], sa L.Lens[S, A]) OPT.Optional[S, A] {
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return creator(F.Flow2(sa.Get, O.Some[A]), func(s S, a A) S {
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return sa.Set(a)(s)
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})
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}
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// LensAsOptional converts a Lens into an Optional
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func LensAsOptional[S, A any](sa L.Lens[S, A]) OPT.Optional[S, A] {
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return lensAsOptional(OPT.MakeOptional[S, A], sa)
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}
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