Method fill

src/arrayvec.rs:513–530

(
    &mut self, iter: I,
  )

  /// ```
  #[inline]
  pub fn fill<I: IntoIterator<Item = A::Item>>(
    &mut self, iter: I,
  ) -> I::IntoIter {
    // If this is written as a call to push for each element in iter, the
    // compiler emits code that updates the length for every element. The
    // additional complexity from that length update is worth nearly 2x in
    // the runtime of this function.
    let mut iter = iter.into_iter();
    let mut pushed = 0;
    let to_take = self.capacity() - self.len();
    let target = &mut self.data.as_slice_mut()[self.len as usize..];
    for element in iter.by_ref().take(to_take) {
      target[pushed] = element;
      pushed += 1;
    }
    self.len += pushed as u16;
    iter
  }

  /// Wraps up an array and uses the given length as the initial length.
  ///