Qt 4.8
qunlimitedcontainer_p.h
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41 
42 //
43 // W A R N I N G
44 // -------------
45 //
46 // This file is not part of the Qt API. It exists purely as an
47 // implementation detail. This header file may change from version to
48 // version without notice, or even be removed.
49 //
50 // We mean it.
51 
52 #ifndef Patternist_UnlimitedContainer_H
53 #define Patternist_UnlimitedContainer_H
54 
55 #include <QList>
56 #include "qexpression_p.h"
57 #include "qgenericsequencetype_p.h"
58 
60 
62 
63 namespace QPatternist
64 {
72  {
73  public:
79 
80  virtual void setOperands(const Expression::List &list);
81 
82  virtual Expression::List operands() const;
83 
87  virtual bool compressOperands(const StaticContext::Ptr &);
88 
96  {
99  };
100 
101  protected:
109  template<CardinalityComputation suppliedCard>
110  inline
112  {
113  Q_ASSERT(suppliedCard == ProductOfCardinality || suppliedCard == UnionOfCardinality);
116 
117  /* Load the first one, and jump over it in the loop. */
118  SequenceType::Ptr t(m_operands.first()->staticType());
119  ItemType::Ptr type(t->itemType());
120  Cardinality card(t->cardinality());
121  ++it;
122 
123  for(; it != end; ++it)
124  {
125  t = (*it)->staticType();
126  type |= t->itemType();
127 
128  /* Since this function is a template function, it doesn't
129  * hurt performance that this test is inside the loop. */
130  if(suppliedCard == ProductOfCardinality)
131  card += t->cardinality();
132  else
133  card |= t->cardinality();
134  }
135 
136  return makeGenericSequenceType(type, card);
137  }
138 
140  };
141 
142 
143 }
144 
146 
148 
149 #endif
int type
Definition: qmetatype.cpp:239
#define QT_END_NAMESPACE
This macro expands to.
Definition: qglobal.h:90
Base class for all AST nodes in an XPath/XQuery/XSL-T expression.
#define QT_BEGIN_HEADER
Definition: qglobal.h:136
virtual bool compressOperands(const StaticContext::Ptr &)
#define it(className, varName)
const_iterator constBegin() const
Returns a const STL-style iterator pointing to the first item in the list.
Definition: qlist.h:269
virtual void setOperands(const Expression::List &list)
#define Q_ASSERT(cond)
Definition: qglobal.h:1823
SequenceType::Ptr operandsUnionType() const
friend class const_iterator
Definition: qlist.h:264
#define QT_BEGIN_NAMESPACE
This macro expands to.
Definition: qglobal.h:89
virtual Expression::List operands() const
The namespace for the internal API of QtXmlPatterns.
T & first()
Returns a reference to the first item in the list.
Definition: qlist.h:282
Base class for expressions that has any amount of operands.
Represents a cardinality, a possible , often represented by occurrence indicators.
static const KeyPair *const end
#define QT_END_HEADER
Definition: qglobal.h:137
UnlimitedContainer(const Expression::List &operands=Expression::List())
const_iterator constEnd() const
Returns a const STL-style iterator pointing to the imaginary item after the last item in the list...
Definition: qlist.h:272