71 lines
1.6 KiB
C#
71 lines
1.6 KiB
C#
/*
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Copyright (C) 2015 Jeroen Frijters
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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Jeroen Frijters
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jeroen@frijters.net
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*/
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using System;
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#if CORECLR
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namespace System.Diagnostics
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{
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static class Debug
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{
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[Conditional("DEBUG")]
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internal static void Assert(bool cond)
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{
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if (!cond)
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{
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Environment.FailFast("assertion failed");
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}
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}
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}
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}
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namespace System.Collections.Generic
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{
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sealed class Stack<T>
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{
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private readonly List<T> items = new List<T>();
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internal void Push(T value)
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{
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items.Add(value);
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}
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internal T Peek()
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{
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if (items.Count == 0)
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{
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throw new InvalidOperationException();
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}
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return items[items.Count - 1];
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}
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internal T Pop()
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{
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T value = Peek();
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items.RemoveAt(items.Count - 1);
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return value;
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}
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}
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}
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#endif
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