fn last_mut(&mut self, span: Span) -> CompileResult<&mut Scope> {
        self.scopes
            .last_mut()
            .ok_or_else(|| CompileError::msg(&span, "missing head of locals"))
    }
/// Get the last locals scope.
Get the last locals scope.
Get the last locals scope .
fn last_mut(&mut self, span: Span) -> CompileResult<&mut Scope> {
        self.scopes
            .last_mut()
            .ok_or_else(|| CompileError::msg(&span, "missing head of locals"))
    }
fn last_mut ( & mut self , span : Span ) -> CompileResult < & mut Scope > { self . scopes . last_mut ( ) . ok_or_else ( | | CompileError :: msg ( & span , " " ) ) }
Get the last locals scope.
Get the last locals scope .
&mut self
span
Span
&mut self
span
Span