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Merged
chsienki merged 3 commits into from
Nov 17, 2022
Merged

Use forattributename jsgenerator #78136

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e865d73
Use ForAttributeWithMetadataName instead of CreateSyntaxProvider
chsienki Nov 9, 2022
538d94f
Remove unused code
chsienki Nov 10, 2022
4f7aaac
Update export generator too
chsienki Nov 10, 2022
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Update export generator too
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@chsienki
chsienki committed Nov 10, 2022
commit 4f7aaace0255dd0f339d59a83d16ae4c3c6eb63e
31 changes: 3 additions & 28 deletions ...ries/System.Runtime.InteropServices.JavaScript/gen/JSImportGenerator/JSExportGenerator.cs
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Expand Up @@ -35,21 +35,9 @@ public void Initialize(IncrementalGeneratorInitializationContext context)
{
// Collect all methods adorned with JSExportAttribute
var attributedMethods = context.SyntaxProvider
.CreateSyntaxProvider(
static (node, ct) => ShouldVisitNode(node),
static (context, ct) =>
{
MethodDeclarationSyntax syntax = (MethodDeclarationSyntax)context.Node;
if (context.SemanticModel.GetDeclaredSymbol(syntax, ct) is IMethodSymbol methodSymbol
&& methodSymbol.GetAttributes().Any(static attribute => attribute.AttributeClass?.ToDisplayString() == Constants.JSExportAttribute))
{
return new { Syntax = syntax, Symbol = methodSymbol };
}

return null;
})
.Where(
static modelData => modelData is not null);
.ForAttributeWithMetadataName(Constants.JSExportAttribute,
static (node, ct) => node is MethodDeclarationSyntax,
static (context, ct) => new { Syntax = (MethodDeclarationSyntax)context.TargetNode, Symbol = (IMethodSymbol)context.TargetSymbol });
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@teo-tsirpanis teo-tsirpanis Nov 10, 2022

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You are pushing symbols down in the pipeline, which affects incrementality.

Fixing it may require more extensive refactorings which I don't know if it can be backported, but I think for this PR that will go to 8, we should do it the right way.

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@chsienki chsienki Nov 10, 2022

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Agree with the symbols issue, but this was being done before. This PR doesn't change that, just makes the existing logic more efficient.

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@jkoritzinsky jkoritzinsky Nov 10, 2022

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This generator (along with the rest of the interop generators) use symbols for a few steps until we are able to build a model that does not contain symbols at a named step "CalculateStubInformation". From that point onwards, the generators are incremental. We can't do incrementality earlier as we need to get the symbols as well as some additional information from the Compilation.


// Validate if attributed methods can have source generated
var methodsWithDiagnostics = attributedMethods.Select(static (data, ct) =>
Expand Down Expand Up @@ -233,19 +221,6 @@ private static (MemberDeclarationSyntax, ImmutableArray<Diagnostic>) GenerateSou
return (PrintGeneratedSource(incrementalContext.StubMethodSyntaxTemplate, incrementalContext.SignatureContext, incrementalContext.ContainingSyntaxContext, wrapper, registration), incrementalContext.Diagnostics.Array.AddRange(diagnostics.Diagnostics));
}

private static bool ShouldVisitNode(SyntaxNode syntaxNode)
{
// We only support C# method declarations.
if (syntaxNode.Language != LanguageNames.CSharp
|| !syntaxNode.IsKind(SyntaxKind.MethodDeclaration))
{
return false;
}

// Filter out methods with no attributes early.
return ((MethodDeclarationSyntax)syntaxNode).AttributeLists.Count > 0;
}

private static Diagnostic? GetDiagnosticIfInvalidMethodForGeneration(MethodDeclarationSyntax methodSyntax, IMethodSymbol method)
{
// Verify the method has no generic types or defined implementation
Expand Down