fn into_singleton()

in gazebo/src/ext/iter.rs [354:363]

• 10 lines of code
• 2 McCabe index (conditional complexity)

    fn into_singleton(mut self) -> Option<Self::Item>
    where
        Self: Sized,
    {
        let ret = self.next()?;
        if self.next().is_some() {
            return None;
        }
        Some(ret)
    }