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using System;

namespace ICSharpCode.Decompiler.Tests.TestCases.Correctness
{
	internal class UncheckedConstants
	{
		private static void Main()
		{
			Console.WriteLine(CombineHash(1, 2));
			Console.WriteLine(CombineHash(-5, 100));
			Console.WriteLine(CombineHash(int.MaxValue, int.MinValue));
		}

		// A compiler-generated-style hash using a local accumulator. After the decompiler inlines the
		// accumulator, the leading "1688038063 * -1521134295" becomes a compile-time constant
		// subexpression that overflows int. Constant subexpressions are always overflow-checked at
		// compile time, so the decompiled output must wrap it in unchecked(...) or it fails to compile
		// with CS0220 ("operation overflows at compile time in checked mode").
		private static int CombineHash(int a, int b)
		{
			int num = 1688038063;
			num = num * -1521134295 + a;
			num = num * -1521134295 + b;
			return num;
		}
	}
}