internal static bool IsMemberDisposed(ISymbol member, IMethodSymbol disposeMethod, SemanticModel semanticModel, CancellationToken cancellationToken)
{
if (member == null ||
disposeMethod == null)
{
return(false);
}
foreach (var reference in disposeMethod.DeclaringSyntaxReferences)
{
var node = reference.GetSyntax(cancellationToken) as MethodDeclarationSyntax;
using (var pooled = DisposeWalker.Create(disposeMethod, semanticModel, cancellationToken))
{
foreach (var invocation in pooled.Item)
{
if (IsDisposing(invocation, member, semanticModel, cancellationToken))
{
return(true);
}
}
}
using (var pooled = IdentifierNameWalker.Create(node))
{
foreach (var identifier in pooled.Item.IdentifierNames)
{
var memberAccess = identifier.Parent as MemberAccessExpressionSyntax;
if (memberAccess?.Expression is BaseExpressionSyntax)
{
var baseMethod = semanticModel.GetSymbolSafe(identifier, cancellationToken) as IMethodSymbol;
if (baseMethod?.Name == "Dispose")
{
if (IsMemberDisposed(member, baseMethod, semanticModel, cancellationToken))
{
return(true);
}
}
}
if (identifier.Identifier.ValueText != member.Name)
{
continue;
}
var symbol = semanticModel.GetSymbolSafe(identifier, cancellationToken);
if (member.Equals(symbol) || (member as IPropertySymbol)?.OverriddenProperty?.Equals(symbol) == true)
{
return(true);
}
}
}
}
return(false);
}
internal static Result IsMemberDisposed(ISymbol member, ITypeSymbol context, SemanticModel semanticModel, CancellationToken cancellationToken)
{
if (!(member is IFieldSymbol ||
member is IPropertySymbol) ||
context == null)
{
return(Result.Unknown);
}
using (var pooled = DisposeWalker.Create(context, semanticModel, cancellationToken))
{
return(pooled.Item.IsMemberDisposed(member));
}
}