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Added index operator for cloning a range

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Closing thorsten/ExaArray#5
This commit is contained in:
Thorsten Sommer 2020-08-01 15:48:07 +02:00
parent a791ad6b0a
commit d2ae4895c4
2 changed files with 21 additions and 2 deletions
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17
ExaArray/ExaArray1D.cs
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@ -188,6 +188,23 @@ namespace Exa
}
}
/// <summary>
/// Creates a new ExaArray1D from this instance, respecting the given range.
/// </summary>
/// <remarks>
/// When <c>T</c> is a value type, data gets copied as values. When <c>T</c> is a reference type, the pointers
/// to the original objects are copied. Thus, this factory method does not create a deep copy.
///
/// Performance: O(n)
///
/// The indices are inclusive.
/// </remarks>
/// <param name="indexFrom">The first source element which should be part of the new array.</param>
/// <param name="indexTo">The last source element which should be part of the new array.</param>
/// <returns>The new instance</returns>
/// <exception cref="IndexOutOfRangeException">Throws, when one or both of the indices are out of range.</exception>
public ExaArray1D<T> this[ulong indexFrom, ulong indexTo] => ExaArray1D<T>.CreateFrom(this, indexFrom, indexTo);
/// <summary>
/// Yields an enumerator across all elements.
/// </summary>

6
ExaArrayTests/ExaArray1DTests.cs
View File

@ -539,13 +539,15 @@ namespace ExaArrayTests
var exPerf = new ExaArray1D<byte>(Strategy.MAX_PERFORMANCE);
exPerf.Extend(3 * MAX); // more than one chunk
var next = ExaArray1D<byte>.CreateFrom(exPerf, 0, exPerf.Length - 1);
var next1 = ExaArray1D<byte>.CreateFrom(exPerf, 0, exPerf.Length - 1);
var next2 = exPerf.Clone();
var next3 = exPerf.Clone(0, exPerf.Length - 1);
var next4 = exPerf[0, exPerf.Length - 1];
Assert.That(next.Length, Is.EqualTo(exPerf.Length));
Assert.That(next1.Length, Is.EqualTo(exPerf.Length));
Assert.That(next2.Length, Is.EqualTo(exPerf.Length));
Assert.That(next3.Length, Is.EqualTo(exPerf.Length));
Assert.That(next4.Length, Is.EqualTo(exPerf.Length));
}
[Test]