public static bool ContainsReference(
SyntaxNode node,
ISymbol symbol,
SemanticModel semanticModel,
CancellationToken cancellationToken = default(CancellationToken))
{
bool result = false;
ContainsLocalOrParameterReferenceWalker walker = null;
try
{
walker = GetInstance(
symbol,
semanticModel,
cancellationToken);
walker.Visit(node);
result = walker.Result;
}
finally
{
if (walker != null)
{
Free(walker);
}
}
return(result);
}
public static bool GetResultAndFree(ContainsLocalOrParameterReferenceWalker walker)
{
bool result = walker.Result;
Free(walker);
return(result);
}
public static void Free(ContainsLocalOrParameterReferenceWalker walker)
{
walker.Result = false;
walker.Symbol = default;
walker.SemanticModel = default;
walker.CancellationToken = default;
_cachedInstance = walker;
}
public static ContainsLocalOrParameterReferenceWalker GetInstance(
ISymbol symbol,
SemanticModel semanticModel,
CancellationToken cancellationToken = default(CancellationToken))
{
ContainsLocalOrParameterReferenceWalker walker = _cachedInstance;
if (walker != null)
{
_cachedInstance = null;
walker.Symbol = symbol;
walker.SemanticModel = semanticModel;
walker.CancellationToken = cancellationToken;
return(walker);
}
return(new ContainsLocalOrParameterReferenceWalker(symbol, semanticModel, cancellationToken));
}
