Add QMetaType::type(QByteArray) function

QMetaType::type(const char *) requires that the string argument is
0-terminated. This new overload makes it possible to query the type
of a string with an explicit length.

In particular, QByteArrays constructed by QByteArray::fromRawData(),
for example from a substring of a normalized method signature (the
"int" part of "mySlot(int"), can now be queried without making a copy
of the string.

Also, Qt5 meta-objects represent type names as QByteArray literals,
which can be fed directly to this new QMetaType::type() overload (no
need to call strlen).

Change-Id: I60d35aa6bdc0f77e0997f98b0e30e12fd3d5e100
Reviewed-by: Jędrzej Nowacki <jedrzej.nowacki@digia.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/src/corelib/kernel/qmetatype.h b/src/corelib/kernel/qmetatype.h
index 08b2fb083a..947bf77796 100644
--- a/src/corelib/kernel/qmetatype.h
+++ b/src/corelib/kernel/qmetatype.h
@@ -472,6 +472,11 @@ public:
     static int registerTypedef(const char *typeName, int aliasId);
     static int registerNormalizedTypedef(const QT_PREPEND_NAMESPACE(QByteArray) &normalizedTypeName, int aliasId);
     static int type(const char *typeName);
+#ifndef Q_QDOC
+    static int type(const QT_PREPEND_NAMESPACE(QByteArray) &typeName);
+#else
+    static int type(const QByteArray &typeName);
+#endif
     static const char *typeName(int type);
     static int sizeOf(int type);
     static TypeFlags typeFlags(int type);