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35 lines
1.0 KiB
Go
35 lines
1.0 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 eq
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import (
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EQ "github.com/IBM/fp-go/eq"
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F "github.com/IBM/fp-go/function"
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)
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// Eq implements an equals predicate on the basis of `map` and `ap`
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func Eq[HKTA, HKTABOOL, HKTBOOL, A any](
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fmap func(HKTA, func(A) func(A) bool) HKTABOOL,
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fap func(HKTABOOL, HKTA) HKTBOOL,
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e EQ.Eq[A],
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) func(l, r HKTA) HKTBOOL {
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c := F.Curry2(e.Equals)
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return func(fl, fr HKTA) HKTBOOL {
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return fap(fmap(fl, c), fr)
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}
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}
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