private string GetUniqueVariableNameInScope(VBasic.VisualBasicSyntaxNode node, string variableNameBase)
{
// Need to check not just the symbols this node has access to, but whether there are any nested blocks which have access to this node and contain a conflicting name
var scopeStarts = node.GetAncestorOrThis <VBSyntax.StatementSyntax>().DescendantNodesAndSelf()
.OfType <VBSyntax.StatementSyntax>().Select(n => n.SpanStart).ToList();
string uniqueName = NameGenerator.GenerateUniqueName(variableNameBase, string.Empty,
n => {
var matchingSymbols = scopeStarts.SelectMany(scopeStart => _semanticModel.LookupSymbols(scopeStart, name: n));
return(!_generatedNames.Contains(n) && !matchingSymbols.Any());
});
_generatedNames.Add(uniqueName);
return(uniqueName);
}
private static List <int> GetScopeStarts(VBasic.VisualBasicSyntaxNode node)
{
return(node.GetAncestorOrThis <VBSyntax.StatementSyntax>().DescendantNodesAndSelf()
.OfType <VBSyntax.StatementSyntax>().Select(n => n.SpanStart).ToList());
}