Method from_trusted_len_iter

arrow-array/src/array/primitive_array.rs:1488–1501

(iter: I)

    /// I.e. that `size_hint().1` correctly reports its length.
    #[inline]
    pub unsafe fn from_trusted_len_iter<I, P>(iter: I) -> Self
    where
        P: std::borrow::Borrow<Option<<T as ArrowPrimitiveType>::Native>>,
        I: IntoIterator<Item = P>,
    {
        let iterator = iter.into_iter();
        let (_, upper) = iterator.size_hint();
        let len = upper.expect("trusted_len_unzip requires an upper limit");

        let (null, buffer) = unsafe { trusted_len_unzip(iterator) };

        let nulls = NullBuffer::from_unsliced_buffer(null, len);
        PrimitiveArray::new(ScalarBuffer::from(buffer), nulls)
    }
}

// TODO: the macro is needed here because we'd get "conflicting implementations" error