Method copy_from_slice_impl

src/buffer.rs:553–579

(
        &self,
        py: Python,
        source: &[T],
        fort: u8,
    )

    }

    fn copy_from_slice_impl<T: Element + Copy>(
        &self,
        py: Python,
        source: &[T],
        fort: u8,
    ) -> PyResult<()> {
        if self.readonly() {
            return buffer_readonly_error(py);
        }
        if mem::size_of_val(source) != self.len_bytes() {
            return slice_length_error(py);
        }
        if !T::is_compatible_format(self.format()) || mem::size_of::<T>() != self.item_size() {
            return incompatible_format_error(py);
        }
        unsafe {
            err::error_on_minusone(
                py,
                ffi::PyBuffer_FromContiguous(
                    &*self.0 as *const ffi::Py_buffer as *mut ffi::Py_buffer,
                    source.as_ptr() as *mut libc::c_void,
                    self.0.len,
                    fort as libc::c_char,
                ),
            )
        }
    }
}

fn slice_length_error(py: Python) -> PyResult<()> {