internal static bool TryGetDisposed(InvocationExpressionSyntax disposeCall, SemanticModel semanticModel, CancellationToken cancellationToken, out ISymbol disposed)
{
disposed = null;
return(IsIDisposableDispose(disposeCall, semanticModel, cancellationToken) &&
MemberPath.TrySingle(disposeCall, out var expression) &&
semanticModel.TryGetSymbol(expression, cancellationToken, out disposed));
}
internal static bool TryGetDisposed(InvocationExpressionSyntax disposeCall, SemanticModel semanticModel, CancellationToken cancellationToken, [NotNullWhen(true)] out ISymbol?disposed)
{
disposed = null;
return(IsMatchAny(disposeCall, semanticModel, cancellationToken) &&
MemberPath.TrySingle(disposeCall, out var expression) &&
semanticModel.TryGetSymbol(expression, cancellationToken, out disposed));
}
internal static bool IsDisposing(InvocationExpressionSyntax disposeCall, ISymbol symbol, SemanticModel semanticModel, CancellationToken cancellationToken)
{
if (TryGetDisposed(disposeCall, semanticModel, cancellationToken, out var disposed))
{
if (disposed.Equals(symbol))
{
return(true);
}
if (disposed is IPropertySymbol property &&
property.TrySingleDeclaration(cancellationToken, out var declaration))
{
using (var walker = ReturnValueWalker.Borrow(declaration, ReturnValueSearch.TopLevel, semanticModel, cancellationToken))
{
return(walker.TrySingle(out var returnValue) &&
MemberPath.TrySingle(returnValue, out var expression) &&
semanticModel.TryGetSymbol(expression, cancellationToken, out ISymbol nested) &&
nested.Equals(symbol));
}
}
}
return(false);
}