Metatype: Remove the need for runtime-registration of 3rd party containers.

Replace that need with a macro so that registration of the
container helper conversions is done at the time of registration
of the container (usually when it is put into a QVariant).

Change-Id: I823fb3fdbce306ebc9f146675ac43724cec678d5
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>

1 files changed, 31 insertions, 0 deletions

diff --git a/src/corelib/doc/snippets/code/src_corelib_kernel_qmetatype.cpp b/src/corelib/doc/snippets/code/src_corelib_kernel_qmetatype.cpp
index 4437313f0a..cb1346f74c 100644
--- a/src/corelib/doc/snippets/code/src_corelib_kernel_qmetatype.cpp
+++ b/src/corelib/doc/snippets/code/src_corelib_kernel_qmetatype.cpp
@@ -112,3 +112,34 @@ id = qMetaTypeId<MyStruct>();       // compile error if MyStruct not declared
 typedef QString CustomString;
 qRegisterMetaType<CustomString>("CustomString");
 //! [9]
+
+//! [10]
+
+#include <deque>
+
+Q_DECLARE_SEQUENTIAL_CONTAINER_METATYPE(std::deque)
+
+void someFunc()
+{
+    std::deque<QFile*> container;
+    QVariant var = QVariant::fromValue(container);
+    // ...
+}
+
+//! [10]
+
+//! [11]
+
+#include <unordered_list>
+
+Q_DECLARE_ASSOCIATIVE_CONTAINER_METATYPE(std::unordered_map)
+
+void someFunc()
+{
+    std::unordered_map<int, bool> container;
+    QVariant var = QVariant::fromValue(container);
+    // ...
+}
+
+//! [11]
+