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Enable CA1825: Avoid zero-length array allocations#13961

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iSazonov merged 7 commits intoPowerShell:masterfrom
xtqqczze:CA1825
Nov 4, 2020
Merged

Enable CA1825: Avoid zero-length array allocations#13961
iSazonov merged 7 commits intoPowerShell:masterfrom
xtqqczze:CA1825

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@xtqqczze xtqqczze commented Nov 1, 2020

@ghost ghost assigned adityapatwardhan Nov 1, 2020
xtqqczze
xtqqczze commented Nov 1, 2020
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src/System.Management.Automation/engine/runtime/Operations/ArrayOps.cs Outdated
if (times == 0 || array.Length == 0)
{
return new T[0]; // don't use Utils.EmptyArray, always return a new array
return Array.Empty<T>();
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@xtqqczze xtqqczze Nov 1, 2020

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@iSazonov Perhaps we should suppress CA1825 here, if there is still a rationale for always returning a new array instance. Utils.EmptyArray was removed in your PR #9042.

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@iSazonov iSazonov Nov 2, 2020 •
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Yes, please revert and suppress. We could update only the comment.

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@xtqqczze xtqqczze Nov 2, 2020

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I will revert and suppress, but I was wondering what reason we do not to use the static empty array?

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@iSazonov iSazonov Nov 2, 2020

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I don't remember. Perhaps it is used in comparisons.

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@xtqqczze xtqqczze Nov 2, 2020

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@PaulHigin Must we always return a new instance, rather then using the static empty array?

xtqqczze
xtqqczze commented Nov 1, 2020
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xtqqczze
xtqqczze commented Nov 1, 2020
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src/System.Management.Automation/engine/PseudoParameters.cs
public object Data { get; set; }

internal static readonly RuntimeDefinedParameter[] EmptyParameterArray = new RuntimeDefinedParameter[0];
internal static readonly RuntimeDefinedParameter[] EmptyParameterArray = Array.Empty<RuntimeDefinedParameter>();
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@xtqqczze xtqqczze Nov 1, 2020

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Perhaps we can inline EmptyParameterArray ?

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@iSazonov iSazonov Nov 2, 2020

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Not in the PR.

@xtqqczze xtqqczze marked this pull request as ready for review November 2, 2020 00:52
@xtqqczze xtqqczze requested a review from anmenaga as a code owner November 2, 2020 00:52
@iSazonov iSazonov added the CL-CodeCleanup Indicates that a PR should be marked as a Code Cleanup change in the Change Log label Nov 2, 2020
@iSazonov iSazonov requested a review from PaulHigin November 2, 2020 11:58
@iSazonov iSazonov merged commit 1d7a93c into PowerShell:master Nov 4, 2020
@iSazonov iSazonov added this to the 7.2.0-preview.1 milestone Nov 4, 2020
@xtqqczze xtqqczze deleted the CA1825 branch November 5, 2020 16:59
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ghost commented Nov 17, 2020

🎉v7.2.0-preview.1 has been released which incorporates this pull request.:tada:

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@iSazonov iSazonov iSazonov approved these changes

@anmenaga anmenaga Awaiting requested review from anmenaga

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@PaulHigin PaulHigin PaulHigin approved these changes

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@xtqqczze @PaulHigin @iSazonov @adityapatwardhan