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45 lines
1.6 KiB
Go
45 lines
1.6 KiB
Go
// 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 readerioeither
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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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RIOE "github.com/IBM/fp-go/v2/readerioeither"
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)
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// Eq implements the equals predicate for values contained in the [ReaderIOEither] monad.
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// It creates an equality checker that can compare two ReaderIOEither values by executing them
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// with a given context and comparing their results using the provided Either equality checker.
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//
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// Parameters:
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// - eq: Equality checker for Either[A] values
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//
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// Returns a function that takes a context and returns an equality checker for ReaderIOEither[A].
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//
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// Example:
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//
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// eqInt := eq.FromEquals(func(a, b either.Either[error, int]) bool {
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// return either.Eq(eq.FromEquals(func(x, y int) bool { return x == y }))(a, b)
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// })
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// eqRIE := Eq(eqInt)
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// ctx := context.Background()
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// equal := eqRIE(ctx).Equals(Right[int](42), Right[int](42)) // true
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func Eq[A any](eq eq.Eq[Either[A]]) func(context.Context) eq.Eq[ReaderIOEither[A]] {
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return RIOE.Eq[context.Context](eq)
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}
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