Wrong Context in Function Definitions with Prepended "::"

class cl: public QObject {
    Q_OBJECT
    void func();
};

void ::cl::func() {
    tr("text");
}

 Qualifying with unknown namespace/class ::void

<!DOCTYPE TS>
<TS version="2.1">
<context>
    <name>void::cl</name>
    <message>
        <location filename="main.cpp" line="34"/>
        <source>text</source>
        <translation type="unfinished"></translation>
    </message>
</context>
</TS>