Struct ScopeMark 

pub struct ScopeMark { /* private fields */ }

Where a scope stood, so a scoped Open … in … (or a declaration’s own implicit namespace) can be wound back EXACTLY, without knowing what it pushed.

It saves the scope rather than an index into it because _root_.baz elaborates at the root: a bracketed change may REMOVE frames as well as add them, and a high-water mark cannot restore what was cleared. Two short Vec clones per command, against a whole elaboration.

Trait Implementations

impl Clone for ScopeMark

fn clone(&self) -> ScopeMark

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ScopeMark

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.