public object Get(IMetadata metadata)
 {
     if (!_cached)
     {
         if (_symbol == null)
         {
             _value = null;
         }
         else if (!_visitor.TryGetDocument(_symbol, out _value))
         {
             // Visit the symbol and try again
             _symbol.Accept(_visitor);
             if (!_visitor.TryGetDocument(_symbol, out _value))
             {
                 _value = null;
             }
         }
         _cached = true;
     }
     return(_value);
 }
Esempio n. 2
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 public object Get(IMetadata metadata)
 {
     if (!_cached)
     {
         _values = _symbols
                   .Where(x => x != null)
                   .Select(x =>
         {
             IDocument document;
             if (!_visitor.TryGetDocument(x, out document))
             {
                 // Visit the symbol and try again
                 x.Accept(_visitor);
                 return(!_visitor.TryGetDocument(x, out document) ? null : document);
             }
             return(document);
         })
                   .Where(x => x != null)
                   .ToImmutableArray();
         _cached = true;
     }
     return(_values);
 }