private static void FindClassSyntax()
{
// Firstly, let's use a SyntaxWalker to explore the SyntaxTree for our document.
// We want to locate the first class declaration in the document so we can perform
// some semantic analysis on it later.
var walker = new ClassDeclarationSyntaxWalker();
walker.Visit(SyntaxTree.GetRoot());
var classDeclaration = walker.ClassDeclaration;
if (classDeclaration == null)
{
return;
}
var baseList = classDeclaration.BaseList;
if (baseList == null || !baseList.Types.Any())
{
return;
}
// Here we use the Compilation to resolve the type symbol for 'System.Attribute'
// As we loaded a reference to the 'System' assembly to our project, the 'System.Attribute'
// type will exist in the semantic state of the compilation.
var attributeType = Compilation.GetTypeByMetadataName("System.Attribute");
//
bool derivesFromAttribute = false;
foreach (var type in baseList.Types)
{
var baseType = type as SimpleBaseTypeSyntax;
if (baseType != null)
{
var typeInfo = SemanticModel.GetTypeInfo(baseType.Type);
if (typeInfo.Type != null &&
typeInfo.Type.TypeKind != TypeKind.Interface &&
SymbolHelper.DerivesFrom(typeInfo.Type, attributeType))
{
derivesFromAttribute = true;
break;
}
}
}
if (!derivesFromAttribute)
{
return;
}
ClassDeclarationSyntax = classDeclaration;
}