There is a small glitch in the clangd tool tip: the namespace seems to be applied twice.

in D:\qt6\qtmultimedia\src\multimedia\audio\qaudioformat_p.h, i hover over the "allSupportedSampleRates" variable, which basically looks like this:

QT_BEGIN_NAMESPACE

namespace QtMultimediaPrivate {

inline constexpr std::array allSupportedSampleRates{
    8'000,  11'025, 12'000, 16'000, 22'050,  24'000,  32'000,  44'100,
    48'000, 64'000, 88'200, 96'000, 128'000, 176'400, 192'000,
};

the tooltip shows "std::std::array":