public static ISymbol GetBaseSymbolOrDefault(SyntaxNode node, SemanticModel semanticModel, CancellationToken cancellationToken)
{
ISymbol symbol = GetDeclaredSymbol();
if (symbol != null)
{
if (!symbol.IsOverride)
{
return(symbol);
}
symbol = symbol.BaseOverriddenSymbol();
if (symbol != null)
{
SyntaxNode syntax = symbol.GetSyntaxOrDefault(cancellationToken);
if (syntax != null)
{
if (syntax is MemberDeclarationSyntax ||
syntax.Kind() == SyntaxKind.VariableDeclarator)
{
return(symbol);
}
}
}
}
return(null);
ISymbol GetDeclaredSymbol()
{
if (node is EventFieldDeclarationSyntax eventFieldDeclaration)
{
VariableDeclaratorSyntax declarator = eventFieldDeclaration.Declaration?.Variables.SingleOrDefault(shouldThrow: false);
if (declarator != null)
{
return(semanticModel.GetDeclaredSymbol(declarator, cancellationToken));
}
return(null);
}
else
{
return(semanticModel.GetDeclaredSymbol(node, cancellationToken));
}
}
}
