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42 lines
1.4 KiB
Go
42 lines
1.4 KiB
Go
// Copyright (c) 2024 - 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 statereaderioresult
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import (
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"context"
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"github.com/IBM/fp-go/v2/eq"
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"github.com/IBM/fp-go/v2/function"
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RIOR "github.com/IBM/fp-go/v2/readerioresult"
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)
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// Eq implements the equals predicate for values contained in the [StateReaderIOResult] monad
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func Eq[S, A any](eqr eq.Eq[ReaderIOResult[Pair[S, A]]]) func(S) eq.Eq[StateReaderIOResult[S, A]] {
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return func(s S) eq.Eq[StateReaderIOResult[S, A]] {
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return eq.FromEquals(func(l, r StateReaderIOResult[S, A]) bool {
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return eqr.Equals(l(s), r(s))
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})
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}
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}
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// FromStrictEquals constructs an [eq.Eq] from the canonical comparison function
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func FromStrictEquals[S comparable, A comparable]() func(context.Context) func(S) eq.Eq[StateReaderIOResult[S, A]] {
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return function.Flow2(
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RIOR.FromStrictEquals[context.Context, Pair[S, A]](),
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Eq[S, A],
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)
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}
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