Obsolete Members for QSet

The following members of class QSet are obsolete. They are provided to keep old source code working. We strongly advise against using them in new code.

Public Types

Public Functions

Static Public Members

Member Type Documentation

typedef QSet::const_reverse_iterator

This typedef is obsolete. It is provided to keep old source code working. We strongly advise against using it in new code.

Deprecated in order to align with std::unordered_set functionality.

The QSet::const_reverse_iterator typedef provides an STL-style const reverse iterator for QSet.

It is simply a typedef for std::reverse_iterator<QSet::const_iterator>.

This typedef was introduced in Qt 5.6.

See also QSet::rbegin(), QSet::rend(), QSet::reverse_iterator, and QSet::const_iterator.

typedef QSet::reverse_iterator

This typedef is obsolete. It is provided to keep old source code working. We strongly advise against using it in new code.

Deprecated in order to align with std::unordered_set functionality.

The QSet::reverse_iterator typedef provides an STL-style non-const reverse iterator for QSet.

It is simply a typedef for std::reverse_iterator<QSet::iterator>.

This typedef was introduced in Qt 5.6.

See also QSet::rbegin(), QSet::rend(), QSet::const_reverse_iterator, and QSet::iterator.

Member Function Documentation

const_reverse_iterator QSet::crbegin() const

This function is obsolete. It is provided to keep old source code working. We strongly advise against using it in new code.

Deprecated in order to align with std::unordered_set functionality.

Returns a const STL-style reverse iterator pointing to the first item in the set, in reverse order.

This function was introduced in Qt 5.6.

See also begin(), rbegin(), and rend().

const_reverse_iterator QSet::crend() const

This function is obsolete. It is provided to keep old source code working. We strongly advise against using it in new code.

Deprecated in order to align with std::unordered_set functionality.

Returns a const STL-style reverse iterator pointing to one past the last item in the set, in reverse order.

This function was introduced in Qt 5.6.

See also end(), rend(), and rbegin().

[static] QSet<T> QSet::fromList(const QList<T> &list)

This function is obsolete. It is provided to keep old source code working. We strongly advise against using it in new code.

Returns a new QSet object containing the data contained in list. Since QSet doesn't allow duplicates, the resulting QSet might be smaller than the list, because QList can contain duplicates.

For example, if you have code like

 QStringList list;
 // ...
 QSet<QString> set = QSet<QString>::fromList(list);

you can rewrite it as

 QStringList list;
 // ...
 QSet<QString> set(list.begin(), list.end());

See also QSet(InputIterator, InputIterator), values(), and QList::toSet().

reverse_iterator QSet::rbegin()

This function is obsolete. It is provided to keep old source code working. We strongly advise against using it in new code.

Deprecated in order to align with std::unordered_set functionality.

Returns a STL-style reverse iterator pointing to the first item in the set, in reverse order.

This function was introduced in Qt 5.6.

See also begin(), crbegin(), and rend().

const_reverse_iterator QSet::rbegin() const

This function is obsolete. It is provided to keep old source code working. We strongly advise against using it in new code.

Deprecated in order to align with std::unordered_set functionality.

This is an overloaded function.

This function was introduced in Qt 5.6.

reverse_iterator QSet::rend()

This function is obsolete. It is provided to keep old source code working. We strongly advise against using it in new code.

Deprecated in order to align with std::unordered_set functionality.

Returns a STL-style reverse iterator pointing to one past the last item in the set, in reverse order.

This function was introduced in Qt 5.6.

See also end(), crend(), and rbegin().

const_reverse_iterator QSet::rend() const

This function is obsolete. It is provided to keep old source code working. We strongly advise against using it in new code.

Deprecated in order to align with std::unordered_set functionality.

This is an overloaded function.

This function was introduced in Qt 5.6.

QList<T> QSet::toList() const

This function is obsolete. It is provided to keep old source code working. We strongly advise against using it in new code.

Returns a new QList containing the elements in the set. The order of the elements in the QList is undefined.

For example, if you have code like

 QSet<QString> set;
 // ...
 QList<QString> list = set.toList();

you can rewrite it as

 QSet<QString> set;
 // ...
 QList<QString> list(set.begin(), set.end());

or

 QSet<QString> set;
 // ...
 QList<QString> list = set.values();

See also QList::QList(InputIterator, InputIterator), values(), fromList(), and QList::fromSet().