QString memory usage

[jogeshwarakundi]

Hi,
small, stupid doubt:
does a QString allocated on stack also store its actual contents on heap?
i mean,

f()
{
    QString str("asdf");
}

f()
{
    QString str("asdf");
}

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the actual asdf is stored on heap only right?
For me stack is a very precious resource and so wanted to confirm this assumption before i proceed, though I guess the Implicit Sharing etc of Qt would not be possible of data also resided on stack only!!!