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43 lines
1.3 KiB
Go
43 lines
1.3 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 tuple contains type definitions and functions for data structures for tuples of heterogenous types. For homogeneous types
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// consider to use arrays for simplicity
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package tuple
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func First[T1, T2 any](t Tuple2[T1, T2]) T1 {
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return t.F1
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}
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func Second[T1, T2 any](t Tuple2[T1, T2]) T2 {
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return t.F2
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}
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func Swap[T1, T2 any](t Tuple2[T1, T2]) Tuple2[T2, T1] {
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return MakeTuple2(t.F2, t.F1)
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}
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func Of[T1, T2 any](e T2) func(T1) Tuple2[T1, T2] {
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return func(t T1) Tuple2[T1, T2] {
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return MakeTuple2(t, e)
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}
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}
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func BiMap[E, G, A, B any](mapSnd func(E) G, mapFst func(A) B) func(Tuple2[A, E]) Tuple2[B, G] {
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return func(t Tuple2[A, E]) Tuple2[B, G] {
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return MakeTuple2(mapFst(First(t)), mapSnd(Second(t)))
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}
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}
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