QVarLengthArray: add relational operators <,<=,>,>=

std::vector has them, too.

[ChangeLog][QtCore][QVarLengthArray] Added relational operators <, <=, >, >= if the element
type supports operator<.

Change-Id: I69e16d361fd4738a56b292ebfa78316d28871eda
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

1 files changed, 48 insertions, 0 deletions

diff --git a/src/corelib/tools/qvarlengtharray.qdoc b/src/corelib/tools/qvarlengtharray.qdoc
index d1b87f381e..5533a7d663 100644
--- a/src/corelib/tools/qvarlengtharray.qdoc
+++ b/src/corelib/tools/qvarlengtharray.qdoc
@@ -667,6 +667,54 @@
     \sa operator==()
 */
 
+/*! \fn bool operator<(const QVarLengthArray<T,Prealloc1> &lhs, const QVarLengthArray<T,Prealloc2> &rhs)
+    \since 5.6
+    \relates QVarLengthArray
+
+    Returns \c true if variable length array \a lhs is
+    \l{http://en.cppreference.com/w/cpp/algorithm/lexicographical_compare}
+    {lexicographically less than} \a rhs; otherwise returns \c false.
+
+    This function requires the value type to have an implementation
+    of \c operator<().
+*/
+
+/*! \fn bool operator<=(const QVarLengthArray<T,Prealloc1> &lhs, const QVarLengthArray<T,Prealloc2> &rhs)
+    \since 5.6
+    \relates QVarLengthArray
+
+    Returns \c true if variable length array \a lhs is
+    \l{http://en.cppreference.com/w/cpp/algorithm/lexicographical_compare}
+    {lexicographically less than or equal to} \a rhs; otherwise returns \c false.
+
+    This function requires the value type to have an implementation
+    of \c operator<().
+*/
+
+/*! \fn bool operator>(const QVarLengthArray<T,Prealloc1> &lhs, const QVarLengthArray<T,Prealloc2> &rhs)
+    \since 5.6
+    \relates QVarLengthArray
+
+    Returns \c true if variable length array \a lhs is
+    \l{http://en.cppreference.com/w/cpp/algorithm/lexicographical_compare}
+    {lexicographically greater than} \a rhs; otherwise returns \c false.
+
+    This function requires the value type to have an implementation
+    of \c operator<().
+*/
+
+/*! \fn bool operator>=(const QVarLengthArray<T,Prealloc1> &lhs, const QVarLengthArray<T,Prealloc2> &rhs)
+    \since 5.6
+    \relates QVarLengthArray
+
+    Returns \c true if variable length array \a lhs is
+    \l{http://en.cppreference.com/w/cpp/algorithm/lexicographical_compare}
+    {lexicographically greater than or equal to} \a rhs; otherwise returns \c false.
+
+    This function requires the value type to have an implementation
+    of \c operator<().
+*/
+
 /*! \fn QVarLengthArray &QVarLengthArray::operator<<(const T &value)
 
     \since 4.8