// 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;
using System.Collections;
using System.Collections.Generic;
 
namespace Microsoft.CodeAnalysis.EmbeddedLanguages.VirtualChars
{
    internal partial struct VirtualCharSequence
    {
        public struct Enumerator : IEnumerator<VirtualChar>
        {
            private readonly VirtualCharSequence _virtualCharSequence;
            private int _position;
 
            public Enumerator(VirtualCharSequence virtualCharSequence)
            {
                _virtualCharSequence = virtualCharSequence;
                _position = -1;
            }
 
            public bool MoveNext() => ++_position < _virtualCharSequence.Length;
            public readonly VirtualChar Current => _virtualCharSequence[_position];
 
            public void Reset()
                => _position = -1;
 
            readonly object? IEnumerator.Current => this.Current;
            public readonly void Dispose() { }
        }
    }
}