private void AnalyzeMethodDeclaration(SyntaxNodeAnalysisContext analysisContext)
{
var typeRule = UseOfPrereleaseReturnTypeRule;
var assemblyRule = UseOfPrereleaseAssemblyReturnTypeRule;
// check method return type
var methodDeclaration = new DeclarationSyntaxFacade(analysisContext.SemanticModel, analysisContext.Node as MethodDeclarationSyntax);
if (TryReportPrereleaseAttributeDiagnostics(analysisContext, methodDeclaration, methodDeclaration.Identifier,
methodDeclaration.Type, typeRule, assemblyRule))
{
return;
}
typeRule = UseOfPrereleaseTypeRule;
assemblyRule = UseOfPrereleaseAssemblyRule;
// check method-local declarations
foreach (var node in methodDeclaration.DescendantNodes())
{
var localDeclarationStatementSyntax = node as LocalDeclarationStatementSyntax;
if (localDeclarationStatementSyntax?.Declaration != null)
{
var variableDeclarationSyntax = localDeclarationStatementSyntax.Declaration;
if (variableDeclarationSyntax.Variables.Count != 1)
{
continue;
}
var localDeclaration = new DeclarationSyntaxFacade(analysisContext.SemanticModel, localDeclarationStatementSyntax);
if (TryReportPrereleaseAttributeDiagnostics(analysisContext, localDeclaration,
localDeclaration.Identifier, localDeclaration.Type, typeRule, assemblyRule))
{
return;
}
}
// TODO: maybe check the initializer?
}
typeRule = UseOfPrereleaseTypeRule;
assemblyRule = UseOfPrereleaseAssemblyRule;
// rule for parameter?
// check parameters
var parameters = ((MethodDeclarationSyntax)methodDeclaration).ParameterList; // TODO: support parameters
foreach (var parameter in parameters.Parameters)
{
var identifier = parameter.Identifier;
var ti = analysisContext.SemanticModel.GetTypeInfo(parameter.Type);
if (TryReportPrereleaseAttributeDiagnostics(analysisContext, methodDeclaration, identifier, ti.Type, typeRule, assemblyRule, "Parameter"))
{
return;
}
}
}
/// declaration
private bool TryReportPrereleaseAttributeDiagnostics(SyntaxNodeAnalysisContext analysisContext,
DeclarationSyntaxFacade node, SyntaxToken identifier,
ITypeSymbol type, DiagnosticDescriptor typeRule,
DiagnosticDescriptor assemblyRule, string identifierContext = "Variable")
{
if (IsNodeInPrereleaseContext(analysisContext, node))
{
return(false);
}
if (type == null)
{
return(false);
}
var attributes = type.GetAttributes();
string attributeName;
if (attributes != null && attributes.Any() && TryGetPrereleaseAttributeName(attributes, out attributeName))
{
var diagnostic = Diagnostic.Create(typeRule,
identifier.GetLocation(),
identifier.ValueText, type.ToString(), attributeName, identifierContext);
analysisContext.ReportDiagnostic(diagnostic);
return(true);
}
// check members// not sure this is needed.
var attributeNames = node.AttributeLists.AttributeFullNames(analysisContext);
if (attributeNames.Any() && TryGetPrereleaseAttributeName(attributeNames, out attributeName))
{
var diagnostic = Diagnostic.Create(assemblyRule,
identifier.GetLocation(),
identifier.ValueText, type.ToString(), attributeName, identifierContext);
analysisContext.ReportDiagnostic(diagnostic);
return(true);
}
attributes = type.ContainingAssembly.GetAttributes();
if (TryGetPrereleaseAttributeName(attributes, out attributeName))
{
var diagnostic = Diagnostic.Create(assemblyRule,
identifier.GetLocation(),
identifier.ValueText, type.ToString(), attributeName, identifierContext);
analysisContext.ReportDiagnostic(diagnostic);
return(true);
}
return(false);
}
private void AnalyzePropertyDeclaration(SyntaxNodeAnalysisContext analysisContext)
{
var propertyDeclaration = new DeclarationSyntaxFacade(analysisContext.SemanticModel,
(PropertyDeclarationSyntax)analysisContext.Node);
const string identifierContext = "Property";
var identifier = propertyDeclaration.Identifier;
var assemblyRule = UseOfPrereleaseAssemblyRule; // TODO:
var typeRule = UseOfPrereleaseTypeRule; // TODO:
TryReportPrereleaseAttributeDiagnostics(analysisContext, propertyDeclaration, identifier, propertyDeclaration.Type,
typeRule, assemblyRule, identifierContext);
}
private bool IsNodeInPrereleaseContext(SyntaxNodeAnalysisContext analysisContext, DeclarationSyntaxFacade node)
{
while (true)
{
var attributeNames = node.AttributeLists.AttributeFullNames(analysisContext);
string attributeName;
if (attributeNames.Any() &&
TryGetPrereleaseAttributeName(attributeNames, out attributeName))
{
return(true);
}
if ((CSharpSyntaxNode)node is CompilationUnitSyntax)
{
return(false);
}
// then check parent node
node = node.Parent;
}
}
private void AnalyzeFieldDeclaration(SyntaxNodeAnalysisContext analysisContext)
{
var fieldDeclaration = new DeclarationSyntaxFacade(analysisContext.SemanticModel,
(FieldDeclarationSyntax)analysisContext.Node);
const string identifierContext = "Field";
foreach (var node in fieldDeclaration.DescendantNodes())
{
var variableDeclarationSyntax = node as VariableDeclarationSyntax;
if (variableDeclarationSyntax?.Variables.Count != 1)
{
continue;
}
var variable = variableDeclarationSyntax.Variables.Single();
var assemblyRule = UseOfPrereleaseAssemblyRule;
var typeRule = UseOfPrereleaseTypeRule;
var identifier = variable.Identifier;
// check field type
if (TryReportPrereleaseAttributeDiagnostics(analysisContext, fieldDeclaration, identifier, fieldDeclaration.Type, typeRule, assemblyRule, identifierContext))
{
return;
}
var expression = variable.Initializer?.Value;
if (expression != null)
{
var castExpressionSyntax = expression as CastExpressionSyntax;
if (castExpressionSyntax != null)
{
expression = castExpressionSyntax.Expression; // for when we fall through
var ti = analysisContext.SemanticModel.GetTypeInfo(castExpressionSyntax.Type);
if (TryReportPrereleaseAttributeDiagnostics(analysisContext, fieldDeclaration, identifier, ti.Type, typeRule,
assemblyRule, identifierContext))
{
return;
}
var symbol = analysisContext.SemanticModel.GetSymbolInfo(castExpressionSyntax).Symbol;
TryReportPrereleaseAttributeDiagnostics(analysisContext, symbol, identifier, "Field");
}
var objectCreationSyntax = (expression as ObjectCreationExpressionSyntax);
var binaryExpression = expression as BinaryExpressionSyntax;
if (binaryExpression != null)
{
var expressionSymbol = analysisContext.SemanticModel.GetSymbolInfo(binaryExpression).Symbol;
TryReportPrereleaseAttributeDiagnostics(analysisContext, expressionSymbol, identifier, "Field");
}
// check the initializer from object creation:
if (objectCreationSyntax?.Type != null)
{
var ti = analysisContext.SemanticModel.GetTypeInfo(expression);
if (TryReportPrereleaseAttributeDiagnostics(analysisContext, fieldDeclaration, identifier, ti.Type, typeRule,
assemblyRule, identifierContext))
{
return;
}
}
// check the initialize from member access
var memberAccessSyntax = expression as MemberAccessExpressionSyntax;
if (memberAccessSyntax != null)
{
var symbolInfo = analysisContext.SemanticModel.GetSymbolInfo(memberAccessSyntax);
var symbol = symbolInfo.Symbol ?? symbolInfo.CandidateSymbols.FirstOrDefault();
if (symbol != null)
{
TryReportPrereleaseAttributeDiagnostics(analysisContext, symbol, identifier, identifierContext);
}
}
var elementAccessSyntax = expression as ElementAccessExpressionSyntax;
if (elementAccessSyntax != null)
{
var symbolInfo = analysisContext.SemanticModel.GetSymbolInfo(elementAccessSyntax);
var symbol = symbolInfo.Symbol ?? symbolInfo.CandidateSymbols.FirstOrDefault();
if (symbol != null)
{
TryReportPrereleaseAttributeDiagnostics(analysisContext, symbol, identifier, identifierContext);
}
}
}
}
}