is-tree 0.9.9

Everything is a tree
Documentation 
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//! A trait for types that have a root.

use crate::KnowsVisitor;

/// A trait for types that have a root.
pub trait HasRoot: KnowsVisitor {
    /// Gets the root of the object.
    fn root(&self) -> Self::Visitor;
}

/// A trait for types that have a root mutably.
/// By design, accessing a Visitor parent is unsafe.
pub unsafe trait HasRootMut: KnowsVisitor {
    /// Gets the root of the object.
    unsafe fn root_mut(&mut self) -> Self::VisitorMut;
}

impl<T> HasRoot for Box<T>
where T: HasRoot
{
    fn root(&self) -> Self::Visitor {
        self.as_ref().root()
    }
}

unsafe impl<T> HasRootMut for Box<T>
where T: HasRootMut
{
    unsafe fn root_mut(&mut self) -> Self::VisitorMut {
        self.as_mut().root_mut()
    }
}