// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
using System;
using System.Collections.Generic;
 
namespace Microsoft.AspNetCore.Razor.PooledObjects;
 
internal static partial class SpecializedPools
{
    /// <summary>
    /// A pool of <see cref="HashSet{T}"/> instances that compares strings.
    /// </summary>
    /// 
    /// <remarks>
    /// Instances originating from this pool are intended to be short-lived and are suitable
    /// for temporary work. Do not return them as the results of methods or store them in fields.
    /// </remarks>
    internal static class StringHashSet
    {
        public static readonly HashSetPool<string> Ordinal = HashSetPool<string>.Create(StringComparer.Ordinal);
        public static readonly HashSetPool<string> OrdinalIgnoreCase = HashSetPool<string>.Create(StringComparer.OrdinalIgnoreCase);
 
        public static PooledObject<HashSet<string>> GetPooledObject()
            => Ordinal.GetPooledObject();
 
        public static PooledObject<HashSet<string>> GetPooledObject(out HashSet<string> set)
            => Ordinal.GetPooledObject(out set);
 
        public static PooledObject<HashSet<string>> GetPooledObject(bool ignoreCase)
            => ignoreCase
                ? OrdinalIgnoreCase.GetPooledObject()
                : Ordinal.GetPooledObject();
 
        public static PooledObject<HashSet<string>> GetPooledObject(bool ignoreCase, out HashSet<string> set)
            => ignoreCase
                ? OrdinalIgnoreCase.GetPooledObject(out set)
                : Ordinal.GetPooledObject(out set);
    }
}