diff options
author | Marc Mutz <marc.mutz@kdab.com> | 2016-03-03 20:20:42 +0100 |
---|---|---|
committer | Giuseppe D'Angelo <giuseppe.dangelo@kdab.com> | 2019-04-17 08:11:21 +0000 |
commit | 2e1763d83a1dacfc5b747934fb77fa7cec7bfe47 (patch) | |
tree | 6b5eb92a868b7227c5391d6cf82f0fb930e3adb9 /src/corelib/tools/qvector.h | |
parent | f363540580eabd5aa27f4c172da796d637e38dfa (diff) |
Non-associative containers: add range constructors
Something nice we'd like to detect for array-backed containers
is if the iterator passed is a Contiguous one; if the type is also
trivially copyable / Q_PRIMITIVE_TYPE, we could memcpy() the whole
range.
However, there's no trait in the Standard to detect contiguous
iterators (the best approximation would be detecting if the iterator
is actually a pointer). Also, it's probably not smart to do the work
now for QVector since QVector needs refactoring anyhow, and this work
will be lost.
QString and QByteArray are left in another commit.
[ChangeLog][QtCore][QVector] Added range constructor.
[ChangeLog][QtCore][QVarLengthArray] Added range constructor.
[ChangeLog][QtCore][QList] Added range constructor.
[ChangeLog][QtCore][QStringList] Added range constructor.
[ChangeLog][QtCore][QLinkedList] Added range constructor.
[ChangeLog][QtCore][QSet] Added range constructor.
Change-Id: I220edb796053c9c4d31a6dbdc7efc5fc0f6678f9
Reviewed-by: Milian Wolff <milian.wolff@kdab.com>
Diffstat (limited to 'src/corelib/tools/qvector.h')
-rw-r--r-- | src/corelib/tools/qvector.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/src/corelib/tools/qvector.h b/src/corelib/tools/qvector.h index 096c369e51..6cbf794c6c 100644 --- a/src/corelib/tools/qvector.h +++ b/src/corelib/tools/qvector.h @@ -45,6 +45,7 @@ #include <QtCore/qrefcount.h> #include <QtCore/qarraydata.h> #include <QtCore/qhashfunctions.h> +#include <QtCore/qcontainertools_impl.h> #include <iterator> #include <vector> @@ -81,6 +82,9 @@ public: inline QVector(std::initializer_list<T> args); QVector<T> &operator=(std::initializer_list<T> args); #endif + template <typename InputIterator, QtPrivate::IfIsInputIterator<InputIterator> = true> + inline QVector(InputIterator first, InputIterator last); + bool operator==(const QVector<T> &v) const; inline bool operator!=(const QVector<T> &v) const { return !(*this == v); } @@ -558,6 +562,15 @@ QT_WARNING_POP #endif // Q_COMPILER_INITIALIZER_LISTS template <typename T> +template <typename InputIterator, QtPrivate::IfIsInputIterator<InputIterator>> +QVector<T>::QVector(InputIterator first, InputIterator last) + : QVector() +{ + QtPrivate::reserveIfForwardIterator(this, first, last); + std::copy(first, last, std::back_inserter(*this)); +} + +template <typename T> void QVector<T>::freeData(Data *x) { destruct(x->begin(), x->end()); |