private Task ProcessSymbolDeclared(CompilationEvent.SymbolDeclared symbolEvent, CancellationToken cancellationToken)
{
try
{
return(AnalyzeSymbol(symbolEvent, cancellationToken));
}
finally
{
symbolEvent.FlushCache();
}
}
private Task AnalyzeSymbol(CompilationEvent.SymbolDeclared symbolEvent, CancellationToken cancellationToken)
{
var symbol = symbolEvent.Symbol;
Action <Diagnostic> addDiagnostic = diagnostic => AddDiagnostic(diagnostic, symbol);
var tasks = ArrayBuilder <Task> .GetInstance();
if ((int)symbol.Kind < DeclarationAnalyzersByKind.Length)
{
foreach (var da in DeclarationAnalyzersByKind[(int)symbol.Kind])
{
// TODO: is the overhead of creating tasks here too high compared to the cost of running them sequentially?
tasks.Add(Task.Run(() =>
{
// Catch Exception from da.AnalyzeSymbol
ExecuteAndCatchIfThrows(da, addDiagnostic, continueOnError, cancellationToken, () =>
{
cancellationToken.ThrowIfCancellationRequested();
da.AnalyzeSymbol(symbol, Compilation, addDiagnostic, cancellationToken);
});
}));
}
}
// TODO: what about syntax references elsewhere, for example in a class base clause?
switch (symbol.Kind)
{
// TODO: what about other syntax, such as base clauses, using directives, top-level attributes, etc?
case SymbolKind.Method:
case SymbolKind.Field:
case SymbolKind.Event: // TODO: should this be restricted to field-like events?
foreach (var decl in symbol.DeclaringSyntaxReferences)
{
tasks.Add(AnalyzeDeclaringReference(symbolEvent, decl, AddDiagnostic, cancellationToken));
}
break;
}
return(Task.WhenAll(tasks.ToImmutableAndFree()));
}
private async Task AnalyzeDeclaringReference(CompilationEvent.SymbolDeclared symbolEvent, SyntaxReference decl, Action <Diagnostic> addDiagnostic, CancellationToken cancellationToken)
{
var symbol = symbolEvent.Symbol;
var syntax = await decl.GetSyntaxAsync();
var endedAnalyzers = ArrayBuilder <ICodeBlockEndedAnalyzer> .GetInstance();
endedAnalyzers.AddRange(CodeBlockEndedAnalyzers);
var nodeAnalyzers = ArrayBuilder <ISyntaxNodeAnalyzer <TSyntaxKind> > .GetInstance();
nodeAnalyzers.AddRange(Analyzers.OfType <ISyntaxNodeAnalyzer <TSyntaxKind> >());
foreach (var da in CodeBlockStartedAnalyzers)
{
// Catch Exception from da.OnCodeBlockStarted
ExecuteAndCatchIfThrows(da, addDiagnostic, continueOnError, cancellationToken, () =>
{
var blockStatefulAnalyzer = da.OnCodeBlockStarted(syntax, symbol, symbolEvent.SemanticModel(decl), addDiagnostic, cancellationToken);
var endedAnalyzer = blockStatefulAnalyzer as ICodeBlockEndedAnalyzer;
if (endedAnalyzer != null)
{
endedAnalyzers.Add(endedAnalyzer);
}
var nodeAnalyzer = blockStatefulAnalyzer as ISyntaxNodeAnalyzer <TSyntaxKind>;
if (nodeAnalyzer != null)
{
nodeAnalyzers.Add(nodeAnalyzer);
}
});
}
PooledDictionary <TSyntaxKind, ArrayBuilder <ISyntaxNodeAnalyzer <TSyntaxKind> > > nodeAnalyzersByKind = null;
foreach (var nodeAnalyzer in nodeAnalyzers)
{
// Catch Exception from nodeAnalyzer.SyntaxKindsOfInterest
try
{
foreach (var kind in nodeAnalyzer.SyntaxKindsOfInterest)
{
if (nodeAnalyzersByKind == null)
{
nodeAnalyzersByKind = PooledDictionary <TSyntaxKind, ArrayBuilder <ISyntaxNodeAnalyzer <TSyntaxKind> > > .GetInstance();
}
ArrayBuilder <ISyntaxNodeAnalyzer <TSyntaxKind> > analyzersForKind;
if (!nodeAnalyzersByKind.TryGetValue(kind, out analyzersForKind))
{
nodeAnalyzersByKind.Add(kind, analyzersForKind = ArrayBuilder <ISyntaxNodeAnalyzer <TSyntaxKind> > .GetInstance());
}
analyzersForKind.Add(nodeAnalyzer);
}
}
catch (Exception e)
{
// Create a info diagnostic saying that the analyzer failed
addDiagnostic(GetAnalyzerDiagnostic(nodeAnalyzer, e));
}
}
nodeAnalyzers.Free();
SemanticModel semanticModel = (nodeAnalyzersByKind != null || endedAnalyzers.Any()) ? symbolEvent.SemanticModel(decl) : null;
if (nodeAnalyzersByKind != null)
{
semanticModel = symbolEvent.SemanticModel(decl);
foreach (var child in syntax.DescendantNodesAndSelf())
{
ArrayBuilder <ISyntaxNodeAnalyzer <TSyntaxKind> > analyzersForKind;
if (nodeAnalyzersByKind.TryGetValue(GetKind(child), out analyzersForKind))
{
foreach (var analyzer in analyzersForKind)
{
// Catch Exception from analyzer.AnalyzeNode
ExecuteAndCatchIfThrows(analyzer, addDiagnostic, continueOnError, cancellationToken, () => { analyzer.AnalyzeNode(child, semanticModel, addDiagnostic, cancellationToken); });
}
}
}
foreach (var b in nodeAnalyzersByKind.Values)
{
b.Free();
}
nodeAnalyzersByKind.Free();
}
foreach (var a in endedAnalyzers)
{
// Catch Exception from a.OnCodeBlockEnded
ExecuteAndCatchIfThrows(a, addDiagnostic, continueOnError, cancellationToken, () => { a.OnCodeBlockEnded(syntax, symbol, semanticModel, addDiagnostic, cancellationToken); });
}
endedAnalyzers.Free();
}