Get Semantic Model on SyntaxTreeAnalysisContext

Question

I am given a SyntaxTreeAnalysisContext context but what I need is a SyntaxNodeAnalysisContext with its SemanticModel property in order to then ascend to the parent node which is a class declaration and then check what attributes have been placed on the type.

SyntaxTreeAnalysisContext givenTreeContext
/// how to get to:
SyntaxNodeAnalysisContext context;

var n = context.Node;
ISymbol symbol = null;
bool hasAttributes = false;

while (n != null)
{
  if (n.IsKind(SyntaxKind.ClassDeclaration))
  {
    symbol = context.SemanticModel.GetDeclaredSymbol(n);        
    hasAttributes = symbol.GetAttributes().Any();
    break;
  }
  else
  {
    n = n.Parent;
  }
}

Is there a way to get from SyntaxTreeAnalysisContext to SyntaxNodeAnalysisContext?

(Edit) To give you an example: I want to enhance some rules (which all use the ReportDiagnostics method of SyntaxTreeAnalysisContext; like SA1027 Use tabs correctly from StyleCop Analyzers) in a way that I can place an attribute on the enclosing type and detect its presence and then omit reporting the diagnostic like

if (!hasAttributes) // simplified
{ 
  context.ReportDiagnostic(...);
}

I don't understand what is it that you're actually trying to do and why is SyntaxTreeAnalysisContext the only thing that you have. Could you expand on that? — svick
– svick, Commented May 8, 2016 at 12:35

Jason Malinowski · Accepted Answer · 2016-05-20 23:31:19Z

2

Register a SemanticModelAnalysis instead in your Initialize method. Syntax ones are for syntax only without having semantic impacts.

answered May 20, 2016 at 23:31

Jason Malinowski

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