private static Diagnostic GetDiagnostic(ElementAccessExpressionSyntax elementAccess)
{
if (!elementAccess.IsBeingAssigned())
{
return(Diagnostic.Create(RuleForGet, elementAccess.GetLocation(), elementAccess));
}
var assignmentExpression = elementAccess.FirstAncestorOrSelf <AssignmentExpressionSyntax>();
return(Diagnostic.Create(RuleForSet, assignmentExpression.GetLocation(), elementAccess));
}
private void AnalyzeSyntaxNode(SyntaxNodeAnalysisContext context)
{
ElementAccessExpressionSyntax elementAccessExpressionSyntax = context.Node as ElementAccessExpressionSyntax;
Location contextLocation = elementAccessExpressionSyntax.GetLocation();
if (elementAccessExpressionSyntax != null)
{
ISymbol expressionSymbol = context.SemanticModel.GetSymbolInfo(elementAccessExpressionSyntax.Expression).Symbol;
if (expressionSymbol.Kind == SymbolKind.Parameter)
{
IParameterSymbol parameter = expressionSymbol as IParameterSymbol;
if (CheckParameterSymbol(parameter))
{
var diagnostic = Diagnostic.Create(DiagnosticDescriptors.DoNotModifyReadonlyArray, elementAccessExpressionSyntax.GetLocation());
context.ReportDiagnostic(diagnostic);
}
}
else if (expressionSymbol.Kind == SymbolKind.Method)
{
IMethodSymbol methodSymbol = expressionSymbol as IMethodSymbol;
if (CheckMethod(methodSymbol))
{
var diagnostic = Diagnostic.Create(DiagnosticDescriptors.DoNotModifyReadonlyArray, elementAccessExpressionSyntax.GetLocation());
context.ReportDiagnostic(diagnostic);
}
}
else if (expressionSymbol.Kind == SymbolKind.Local)
{
ILocalSymbol localSymbol = expressionSymbol as ILocalSymbol;
if (CheckLocalSymbol(localSymbol))
{
var diagnostic = Diagnostic.Create(DiagnosticDescriptors.DoNotModifyReadonlyArray, elementAccessExpressionSyntax.GetLocation());
context.ReportDiagnostic(diagnostic);
}
}
else if (expressionSymbol.Kind == SymbolKind.Field)
{
IFieldSymbol fieldSymbol = expressionSymbol as IFieldSymbol;
if (CheckFieldSymbol(fieldSymbol))
{
var diagnostic = Diagnostic.Create(DiagnosticDescriptors.DoNotModifyReadonlyArray, elementAccessExpressionSyntax.GetLocation());
context.ReportDiagnostic(diagnostic);
}
}
}
}