private static async Task<IEnumerable<DiagnosticData>> GetSyntaxDiagnosticsAsync(ProviderId providerId, DiagnosticAnalyzer provider, DiagnosticAnalyzerDriver userDiagnosticDriver)
{
using (Logger.LogBlock(FunctionId.Diagnostics_SyntaxDiagnostic, GetSyntaxLogMessage, userDiagnosticDriver.Document, userDiagnosticDriver.Span, providerId, userDiagnosticDriver.CancellationToken))
{
try
{
Contract.ThrowIfNull(provider);
var diagnostics = await userDiagnosticDriver.GetSyntaxDiagnosticsAsync(provider).ConfigureAwait(false);
return GetDiagnosticData(userDiagnosticDriver.Document, userDiagnosticDriver.Span, diagnostics);
}
catch (Exception e) when (FatalError.ReportUnlessCanceled(e))
{
throw ExceptionUtilities.Unreachable;
}
}
}
private static IEnumerable<Diagnostic> GetDiagnostics(DiagnosticAnalyzer analyzerOpt, Document document, TextSpan span, Project project, bool getDocumentDiagnostics, bool getProjectDiagnostics, bool donotCatchAnalyzerExceptions)
{
var documentDiagnostics = SpecializedCollections.EmptyEnumerable<Diagnostic>();
var projectDiagnostics = SpecializedCollections.EmptyEnumerable<Diagnostic>();
// If no user diagnostic analyzer, then test compiler diagnostics.
var analyzer = analyzerOpt ?? DiagnosticExtensions.GetCompilerDiagnosticAnalyzer(project.Language);
if (getDocumentDiagnostics)
{
var tree = document.GetSyntaxTreeAsync().Result;
var root = document.GetSyntaxRootAsync().Result;
var semanticModel = document.GetSemanticModelAsync().Result;
var builder = new List<Diagnostic>();
var nodeInBodyAnalyzerService = document.Project.Language == LanguageNames.CSharp ?
(ISyntaxNodeAnalyzerService)new CSharpSyntaxNodeAnalyzerService() :
new VisualBasicSyntaxNodeAnalyzerService();
// Lets replicate the IDE diagnostic incremental analyzer behavior to determine span to test:
// (a) If the span is contained within a method level member and analyzer supports semantic in span: analyze in member span.
// (b) Otherwise, analyze entire syntax tree span.
var spanToTest = root.FullSpan;
var driver = new DiagnosticAnalyzerDriver(document, spanToTest, root, syntaxNodeAnalyzerService: nodeInBodyAnalyzerService, cancellationToken: CancellationToken.None, testOnly_DonotCatchAnalyzerExceptions: donotCatchAnalyzerExceptions);
var diagnosticAnalyzerCategory = analyzer.GetDiagnosticAnalyzerCategory(driver);
bool supportsSemanticInSpan = (diagnosticAnalyzerCategory & DiagnosticAnalyzerCategory.SemanticSpanAnalysis) != 0;
if (supportsSemanticInSpan)
{
var syntaxFacts = document.Project.LanguageServices.GetService<ISyntaxFactsService>();
if (syntaxFacts != null)
{
var member = syntaxFacts.GetContainingMemberDeclaration(root, span.Start);
if (member != null && syntaxFacts.IsMethodLevelMember(member) && member.FullSpan.Contains(span))
{
spanToTest = member.FullSpan;
}
}
}
if ((diagnosticAnalyzerCategory & DiagnosticAnalyzerCategory.SyntaxAnalysis) != 0)
{
builder.AddRange(driver.GetSyntaxDiagnosticsAsync(analyzer).Result ?? SpecializedCollections.EmptyEnumerable<Diagnostic>());
}
if (supportsSemanticInSpan || (diagnosticAnalyzerCategory & DiagnosticAnalyzerCategory.SemanticDocumentAnalysis) != 0)
{
builder.AddRange(driver.GetSemanticDiagnosticsAsync(analyzer).Result ?? SpecializedCollections.EmptyEnumerable<Diagnostic>());
}
documentDiagnostics = builder.Where(d => d.Location == Location.None ||
(d.Location.SourceTree == tree && d.Location.SourceSpan.IntersectsWith(span)));
}
if (getProjectDiagnostics)
{
var nodeInBodyAnalyzerService = project.Language == LanguageNames.CSharp ?
(ISyntaxNodeAnalyzerService)new CSharpSyntaxNodeAnalyzerService() :
new VisualBasicSyntaxNodeAnalyzerService();
var driver = new DiagnosticAnalyzerDriver(project, nodeInBodyAnalyzerService, CancellationToken.None);
if (analyzer.SupportsProjectDiagnosticAnalysis(driver))
{
projectDiagnostics = driver.GetProjectDiagnosticsAsync(analyzer, null).Result ?? SpecializedCollections.EmptyEnumerable<Diagnostic>();
}
}
return documentDiagnostics.Concat(projectDiagnostics);
}