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go - casting a cgo array into a slice

At the moment I do this for casting a CGO array of doubles into a slice of float64:

doubleSlc := [6]C.double{}

// Fill doubleSlc

floatSlc := []float64{float64(doubleSlc[0]), float64(doubleSlc[1]), float64(doubleSlc[2]),
                      float64(doubleSlc[3]), float64(doubleSlc[4]), float64(doubleSlc[5])}

Is there a less cumbersome way of doing the same thing? I suppose this can also be seen as a general way of casting between slices/arrays of different types in Go.

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