47 строки
1.6 KiB
C#
47 строки
1.6 KiB
C#
// Licensed to the .NET Foundation under one or more agreements.
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// The .NET Foundation licenses this file to you under the MIT license.
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// See the LICENSE file in the project root for more information.
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using System;
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using System.Runtime.CompilerServices;
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namespace CommunityToolkit.WinUI.UI.Predicates
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{
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/// <summary>
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/// An <see cref="IPredicate{T}"/> type matching items of a given type.
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/// </summary>
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/// <typeparam name="T">The type of items to match.</typeparam>
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/// <typeparam name="TState">The type of state to use when matching items.</typeparam>
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internal readonly struct PredicateByFunc<T, TState> : IPredicate<T>
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where T : class
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{
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/// <summary>
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/// The state to give as input to <see name="predicate"/>.
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/// </summary>
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private readonly TState state;
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/// <summary>
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/// The predicatee to use to match items.
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/// </summary>
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private readonly Func<T, TState, bool> predicate;
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/// <summary>
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/// Initializes a new instance of the <see cref="PredicateByFunc{T, TState}"/> struct.
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/// </summary>
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/// <param name="state">The state to give as input to <paramref name="predicate"/>.</param>
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/// <param name="predicate">The predicatee to use to match items.</param>
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public PredicateByFunc(TState state, Func<T, TState, bool> predicate)
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{
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this.state = state;
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this.predicate = predicate;
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}
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/// <inheritdoc/>
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public bool Match(T element)
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{
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return this.predicate(element, state);
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}
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}
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}
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