using System;
using System.Collections;

namespace System.Text.RegularExpressions
{
	// Token: 0x020002CB RID: 715
	internal abstract class LinkStack : LinkRef
	{
		// Token: 0x06001A0A RID: 6666 RVA: 0x0005CB78 File Offset: 0x0005AD78
		public LinkStack()
		{
			this.stack = new Stack();
		}

		// Token: 0x06001A0B RID: 6667 RVA: 0x0005CB8C File Offset: 0x0005AD8C
		public void Push()
		{
			this.stack.Push(this.GetCurrent());
		}

		// Token: 0x06001A0C RID: 6668 RVA: 0x0005CBA0 File Offset: 0x0005ADA0
		public bool Pop()
		{
			if (this.stack.Count > 0)
			{
				this.SetCurrent(this.stack.Pop());
				return true;
			}
			return false;
		}

		// Token: 0x06001A0D RID: 6669
		protected abstract object GetCurrent();

		// Token: 0x06001A0E RID: 6670
		protected abstract void SetCurrent(object l);

		// Token: 0x04001578 RID: 5496
		private Stack stack;
	}
}