private void AnalyzeCodeBlock(CodeBlockAnalysisContext blockContext, AnalyzerConfig analyzerConfig)
{
if (blockContext.OwningSymbol is IMethodSymbol methodSymbol &&
analyzerConfig.ShouldAnalyze(methodSymbol.ContainingType))
{
AnalyzeMethodBlock(blockContext, methodSymbol, analyzerConfig);
}
}
private void CompilationStart(CompilationStartAnalysisContext context)
{
var checkExceptionAttributes = from attr in context.Compilation.Assembly.GetAttributes()
let c = attr.AttributeClass
where KnownTypes.CheckExceptionsAttributesFullName == c.GetFullName()
select attr;
var analyzerConfig = new AnalyzerConfig(checkExceptionAttributes);
context.RegisterCodeBlockAction(blockContext => AnalyzeCodeBlock(blockContext, analyzerConfig));
}
private void AnalyzeMethodBlock(CodeBlockAnalysisContext blockContext, IMethodSymbol methodSymbol, AnalyzerConfig analyzerConfig)
{
var declaredThrowTypes = GetDeclaredTypes(methodSymbol);
var throwStatements = blockContext.CodeBlock.DescendantNodes().OfType <ThrowStatementSyntax>();
var offendingThrows = from thrw in throwStatements
let exType = blockContext.SemanticModel.GetTypeInfo(thrw.Expression).Type
where !exType.InheritsFromOrEqualsAny(declaredThrowTypes)
select(expression: thrw, type: exType);
var uncaughtThrows = from thrw in offendingThrows
where !blockContext.SemanticModel.IsCaught(thrw.type, thrw.expression)
select thrw;
foreach (var thrw in uncaughtThrows)
{
var exceptionType = thrw.type;
var diagnostic = Diagnostic.Create(
Rule,
thrw.expression.GetLocation(),
methodSymbol.Name,
exceptionType.Name
);
blockContext.ReportDiagnostic(diagnostic);
}
}