public async Task <IEnumerable <Diagnostic> > GetProjectDiagnosticsAsync(DiagnosticAnalyzer analyzer, Action <Project, DiagnosticAnalyzer, CancellationToken> forceAnalyzeAllDocuments)
        {
            Contract.ThrowIfNull(this.project);
            Contract.ThrowIfFalse(this.document == null);
            Contract.ThrowIfFalse(analyzer.SupportsProjectDiagnosticAnalysis(this));

            using (var diagnostics = SharedPools.Default <List <Diagnostic> >().GetPooledObject())
            {
                if (this.project.SupportsCompilation)
                {
                    await this.GetCompilationDiagnosticsAsync(analyzer, diagnostics.Object, forceAnalyzeAllDocuments).ConfigureAwait(false);
                }

                await this.GetProjectDiagnosticsWorkerAsync(analyzer, diagnostics.Object).ConfigureAwait(false);

                return(diagnostics.Object.ToImmutableArray());
            }
        }
            private static bool ShouldRunProviderForStateType(StateType stateTypeId, DiagnosticAnalyzer provider, DiagnosticAnalyzerDriver driver,
                out bool supportsSemanticInSpan, ImmutableHashSet<string> diagnosticIds = null, Func<DiagnosticAnalyzer, ImmutableArray<DiagnosticDescriptor>> getDescriptor = null)
            {
                Debug.Assert(!IsAnalyzerSuppressed(provider, driver.Project.CompilationOptions, driver));

                supportsSemanticInSpan = false;
                if (diagnosticIds != null && getDescriptor(provider).All(d => !diagnosticIds.Contains(d.Id)))
                {
                    return false;
                }

                switch (stateTypeId)
                {
                    case StateType.Syntax:
                        return provider.SupportsSyntaxDiagnosticAnalysis(driver);

                    case StateType.Document:
                        return provider.SupportsSemanticDiagnosticAnalysis(driver, out supportsSemanticInSpan);

                    case StateType.Project:
                        return provider.SupportsProjectDiagnosticAnalysis(driver);

                    default:
                        throw ExceptionUtilities.Unreachable;
                }
            }
        public async Task<IEnumerable<Diagnostic>> GetProjectDiagnosticsAsync(DiagnosticAnalyzer analyzer, Action<Project, DiagnosticAnalyzer, CancellationToken> forceAnalyzeAllDocuments)
        {
            Contract.ThrowIfNull(_project);
            Contract.ThrowIfFalse(_document == null);
            Contract.ThrowIfFalse(analyzer.SupportsProjectDiagnosticAnalysis(this));

            using (var diagnostics = SharedPools.Default<List<Diagnostic>>().GetPooledObject())
            {
                if (_project.SupportsCompilation)
                {
                    await this.GetCompilationDiagnosticsAsync(analyzer, diagnostics.Object, forceAnalyzeAllDocuments).ConfigureAwait(false);
                }

                await this.GetProjectDiagnosticsWorkerAsync(analyzer, diagnostics.Object).ConfigureAwait(false);

                return diagnostics.Object.ToImmutableArray();
            }
        }