// Copyright (c) Microsoft Corporation. All rights reserved. // Licensed under the MIT license. package com.mojang.datafixers.optics; import com.mojang.datafixers.util.Pair; public final class Proj1<F, G, F2> implements Lens<Pair<F, G>, Pair<F2, G>, F, F2> { @Override public F view(final Pair<F, G> pair) { return pair.getFirst(); } @Override public Pair<F2, G> update(final F2 newValue, final Pair<F, G> pair) { return Pair.of(newValue, pair.getSecond()); } @Override public String toString() { return "π1"; } @Override public boolean equals(final Object obj) { return obj instanceof Proj1<?, ?, ?>; } }