Enum Scope 

pub enum Scope {
    Global,
    Local,
    Named(SymStr),
    InPlace,
}

installation scope in the state_tables

Variants

Global

globally visible, does not expire

Local

globally visible, but expires at the end of the current group

Named(SymStr)

a named scope - visible only when explicitly activated

InPlace

in-place: replace the value in the frame it was last bound in, WITHOUT recording a new undo entry (or globally, at the locked base frame, if it was never bound). Perl State.pm:175 $scope eq 'inplace' (“Special case for \box & friends”). This is Knuth’s “same level” reassignment / what @xworld21 tentatively called scope => 'definition': the binding keeps its save-stack level, so a mutation rides exactly as long as the current binding — persisting past the current group if the binding was made above it, reverting with the group if it was made locally. Distinct from Global (which promotes + wipes lower-frame undo) and Local (which pushes an outer binding down a level). The Value-table fast path is assign_value_inplace.

Trait Implementations

impl Clone for Scope

fn clone(&self) -> Scope

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Scope

impl Debug for Scope

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

Formats the value using the given formatter.

impl Eq for Scope

impl PartialEq for Scope

fn eq(&self, other: &Scope) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Scope