QVector: add an rvalue overload of push_back/append

This is low-hanging fruit, for two reasons:
1. The implementation is dead-simple (unlike, say, in QList).
2. It's completely transparent to the QVector user (unlike,
   say, emplace_back, which can only be used inside an ifdef).

Change-Id: Iaf750100cf61ced77aa452f0e4e3c4ec36b29639
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>

1 files changed, 15 insertions, 2 deletions

diff --git a/src/corelib/doc/snippets/code/src_corelib_tools_qvector.cpp b/src/corelib/doc/snippets/code/src_corelib_tools_qvector.cpp
index 77b34c95fc..5def361b83 100644
--- a/src/corelib/doc/snippets/code/src_corelib_tools_qvector.cpp
+++ b/src/corelib/doc/snippets/code/src_corelib_tools_qvector.cpp
@@ -84,14 +84,27 @@ for (int i = 0; i < 10; ++i)
 
 
 //! [7]
-QVector<QString> vector(0);
+QVector<QString> vector;
 vector.append("one");
 vector.append("two");
-vector.append("three");
+QString three = "three";
+vector.append(three);
 // vector: ["one", "two", "three"]
+// three: "three"
 //! [7]
 
 
+//! [move-append]
+QVector<QString> vector;
+vector.append("one");
+vector.append("two");
+QString three = "three";
+vector.append(std::move(three));
+// vector: ["one", "two", "three"]
+// three: ""
+//! [move-append]
+
+
 //! [8]
 QVector<QString> vector;
 vector.prepend("one");