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Add support for System.Diagnostics.CodeAnalysis.ExperimentalAttribute #68702

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merged 8 commits into from
Jul 6, 2023
Merged

Add support for System.Diagnostics.CodeAnalysis.ExperimentalAttribute #68702

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58f7312
Add support for ExperimentalAttribute
jcouv Jun 18, 2023
eb8b887
Rename
jcouv Jun 20, 2023
4b36e8b
Add test
jcouv Jun 21, 2023
2608051
formatting
jcouv Jun 21, 2023
1b61429
Address feedback
jcouv Jun 22, 2023
1226862
Address feedback
jcouv Jul 5, 2023
38dbb3f
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jcouv Jul 6, 2023
bddcfb3
Error format
jcouv Jul 6, 2023
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14 changes: 11 additions & 3 deletions src/Compilers/CSharp/Portable/Symbols/ObsoleteAttributeHelpers.cs
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Expand Up @@ -99,6 +99,7 @@ internal static ObsoleteDiagnosticKind GetObsoleteDiagnosticKind(Symbol symbol,
{
case ObsoleteAttributeKind.None:
return ObsoleteDiagnosticKind.NotObsolete;
case ObsoleteAttributeKind.WindowsExperimental:
case ObsoleteAttributeKind.Experimental:
return ObsoleteDiagnosticKind.Diagnostic;
case ObsoleteAttributeKind.Uninitialized:
Expand Down Expand Up @@ -154,12 +155,19 @@ static DiagnosticInfo createObsoleteDiagnostic(Symbol symbol, BinderFlags locati
return null;
}

if (data.Kind == ObsoleteAttributeKind.Experimental)
if (data.Kind == ObsoleteAttributeKind.WindowsExperimental)
{
Debug.Assert(data.Message == null);
Debug.Assert(!data.IsError);
// Provide an explicit format for fully-qualified type names.
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@cston cston Jul 3, 2023 •
edited by jcouv
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Provide an explicit format for fully-qualified type names.

Are we testing that type names are fully-qualified? (The format used in MessageProvider.cs is CSharpShortErrorMessageFormat which may drop the namespace.) #Resolved

return new CSDiagnosticInfo(ErrorCode.WRN_Experimental, new FormattedSymbol(symbol, SymbolDisplayFormat.CSharpErrorMessageFormat));
return new CSDiagnosticInfo(ErrorCode.WRN_Experimental, symbol);
}

if (data.Kind == ObsoleteAttributeKind.Experimental)
{
Debug.Assert(data.Message is null);
Debug.Assert(!data.IsError);

return new CustomObsoleteDiagnosticInfo(MessageProvider.Instance, (int)ErrorCode.WRN_Experimental, data, symbol);
}

// Issue a specialized diagnostic for add methods of collection initializers
Expand Down
1 change: 1 addition & 0 deletions src/Compilers/CSharp/Portable/Symbols/Symbol.cs
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Expand Up @@ -1320,6 +1320,7 @@ internal ThreeState ObsoleteState
switch (ObsoleteKind)
{
case ObsoleteAttributeKind.None:
case ObsoleteAttributeKind.WindowsExperimental:
case ObsoleteAttributeKind.Experimental:
return ThreeState.False;
case ObsoleteAttributeKind.Uninitialized:
Expand Down
4 changes: 4 additions & 0 deletions src/Compilers/CSharp/Portable/Symbols/Symbol_Attributes.cs
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Expand Up @@ -162,6 +162,10 @@ internal static bool EarlyDecodeDeprecatedOrExperimentalOrObsoleteAttribute(
{
kind = ObsoleteAttributeKind.Deprecated;
}
else if (CSharpAttributeData.IsTargetEarlyAttribute(type, syntax, AttributeDescription.WindowsExperimentalAttribute))
{
kind = ObsoleteAttributeKind.WindowsExperimental;
}
else if (CSharpAttributeData.IsTargetEarlyAttribute(type, syntax, AttributeDescription.ExperimentalAttribute))
{
kind = ObsoleteAttributeKind.Experimental;
Expand Down
2 changes: 1 addition & 1 deletion src/Compilers/CSharp/Test/Emit2/Attributes/AttributeTests_Experimental.cs
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Expand Up @@ -10,7 +10,7 @@

namespace Microsoft.CodeAnalysis.CSharp.UnitTests
{
public class AttributeTests_Experimental : CSharpTestBase
public class AttributeTests_WindowsExperimental : CSharpTestBase
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Also rename the file?

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I was intentionally not planning to rename the file. That unfortunately degrades the history and doesn't seem critical for this case.

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History is only degraded when the changes to the file exceed the threshold of similarity. This one-line change would be detected by Git as a rename and features like blame would not be impacted.

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Note that the rename can be implemented in a separate commit to ensure Git tracks the rename correctly. The squash-merge anti-feature works hard to undermine core Git functionality, but again this file would not exceed the standard similarity threshold.

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Do you have an example where blame on GitHub shows the proper history after a file rename?
I've seen git show a rename locally, but never saw blame work.

{
private const string DeprecatedAttributeSource =
@"using System;
Expand Down
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