private void AnalyzeSymbol(SyntaxNodeAnalysisContext context)
{
var expression = (VariableDeclarationSyntax)context.Node;
var typeExpression = expression.Type;
if (!(typeExpression is IdentifierNameSyntax))
{
return;
}
if (typeExpression.IsVar)
{
return;
}
var symbol = context.SemanticModel.GetSymbolInfo(typeExpression).Symbol;
var typeName = symbol.MetadataName;
var namespaceName = symbol.ContainingNamespace.Name;
if (namespaceName != "System")
{
return;
}
if (MapConcreteTypeToPredefinedTypeAlias.ContainsKey(typeName))
{
context.ReportDiagnostic(Diagnostic.Create(Rule, typeExpression.GetLocation(),
MapConcreteTypeToPredefinedTypeAlias.First(kvp => kvp.Key == typeName).Value, typeName));
}
}
private async Task <Solution> AsToCastAsync(Document document, SyntaxNode root, SyntaxNode statement)
{
var semanticModel = await document.GetSemanticModelAsync();
var typeName = semanticModel.GetSymbolInfo((IdentifierNameSyntax)statement).Symbol.MetadataName;
var aliasToken =
MapConcreteTypeToPredefinedTypeAlias.First(
kvp => kvp.Key == typeName).Value;
var newExpression = SyntaxFactory.PredefinedType(SyntaxFactory.Token(aliasToken)).WithAdditionalAnnotations(Formatter.Annotation);
var newRoot = root.ReplaceNode(statement, newExpression);
var newDocument = document.WithSyntaxRoot(newRoot);
return(newDocument.Project.Solution);
}
