// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
 
using System.Collections.Generic;
 
namespace Microsoft.CodeAnalysis.Shared.Utilities;
 
internal abstract partial class Matcher<T>
{
    private sealed class ChoiceMatcher(params Matcher<T>[] matchers) : Matcher<T>
    {
        private readonly IEnumerable<Matcher<T>> _matchers = matchers;
 
        public override bool TryMatch(IList<T> sequence, ref int index)
        {
            // we can't use .Any() here because ref parameters can't be used in lambdas
            foreach (var matcher in _matchers)
            {
                if (matcher.TryMatch(sequence, ref index))
                {
                    return true;
                }
            }
 
            return false;
        }
 
        public override string ToString()
            => $"({string.Join("|", _matchers)})";
    }
}