Hi all. I've just started experimenting around with XQuery and the QtXmlPatterns module. I've
put together a small example application but it results in a Segfault. The test.xql script however
works just fine when processed by the patternist command or Saxon. It's also noteworthy that
changing
Qt Code: 
  1. ...
  2. for $value in doc("test.xml")/test/entries/entry[@attr = 'y']
  3. return $value
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to
Qt Code: 
  1. ...
  2. for $value in doc("test.xml")/test/entries/entry[@attr = 'y']
  3. return string($value)
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fixes the problem. But for now I want to play around with the nodes, not with the Atomic values they contain.

Main.cpp:
Qt Code: 
  1. #include <QtGui>
  2. #include <QtXmlPatterns>
  3.  
  4. int main(int argc, char* argv[])
  5. {
  6.     QApplication app(argc, argv);
  7.     QXmlQuery query;
  8.  
  9.     QFile f("test.xql");
  10.     if (!f.open(QIODevice::ReadOnly | QIODevice::Text)) {
  11.         qDebug() << "couldn't open query file.";
  12.         return 1;
  13.     }
  14.  
  15.     query.setQuery(&f);
  16.     if (!query.isValid()) {
  17.         qDebug() << "query not valid.";
  18.         return 1;
  19.     }
  20.  
  21.     QXmlResultItems results;
  22.     query.evaluateToResult(&results);
  23.  
  24.     for (QXmlItem item = results.next(); !item.isNull(); item = results.next()) {
  25.         if (item.isAtomicValue()) {
  26.             qDebug() << item.toAtomicValue().toString();
  27.         } else
  28.             qDebug() << "encountered node";
  29.     }
  30.     return 0;
  31. }
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XQuery script (test.xql):
Qt Code: 
  1. for $value in doc("test.xml")/test/entries/entry[@attr = 'y']
  2. return $value
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Xml File (test.xml):
Qt Code: 
  1. <test>
  2.     <entries>
  3.         <entry attr="x">Value 1</entry>
  4.         <entry attr="y">Value 2</entry>
  5.         <entry attr="z">Value 3</entry>
  6.     </entries>
  7. </test>
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