public unsafe void RawArraySlice()
{
const int memLen = 5;
var mem = stackalloc int[memLen] {
0, 1, 2, 3, 4
};
var array = new RawArray <int>((IntPtr)mem, memLen);
var array03 = new RawArray <int>((IntPtr)mem, 3);
var array22 = new RawArray <int>((IntPtr)(mem + 2), 2);
var array32 = new RawArray <int>((IntPtr)(mem + 3), 2);
AssertEqual(array.Slice(0, array.Length), array);
AssertEqual(array.Slice(0, 3), array03);
AssertEqual(array.Slice(2, 2), array22);
AssertEqual(array.Slice(3, 2), array32);
AssertEqual(array.Slice(3), array32);
AssertEqual(array.Slice(0), array);
Assert.True(array.Slice(5).IsEmpty);
Assert.True(array.Slice(5, 0).IsEmpty);
AssertEqual(array.AsSpan(0, array.Length), array);
AssertEqual(array.AsSpan(0, 3), array03);
AssertEqual(array.AsSpan(2, 2), array22);
AssertEqual(array.AsSpan(3, 2), array32);
AssertEqual(array.AsSpan(3), array32);
AssertEqual(array.AsSpan(0), array);
Assert.True(array.AsSpan(5).IsEmpty);
Assert.True(array.AsSpan(5, 0).IsEmpty);
}
private static void AssertEqual <T>(ReadOnlySpan <T> array1, RawArray <T> array2) where T : unmanaged, IEquatable <T>
{
Assert.True(array1.SequenceEqual(array2.AsSpan()));
}