If C<$what> is a string pointing to an undeclared variable, the variable will be vivified as soon as the localization occurs and emptied when it ends, although it will still exist in its glob.
-=head2 C<localize_delete $what, $key, $context>
+=head2 C<localize_delete>
+
+ localize_delete $what, $key;
+ localize_delete $what, $key, $context;
Introduces the deletion of a variable or an array/hash element delayed to the time of first return into the upper scope denoted by C<$context>.
C<$what> can be:
will rightfully set C<$num> to C<26>.
-=head2 C<uplevel $code, @args, $context>
+=head2 C<uplevel>
my @ret = uplevel { ...; return @ret };
my @ret = uplevel { my @args = @_; ...; return @ret } @args;
my @ret = uplevel { ... } @args, $context;
my @ret = &uplevel($callback, @args, $context);
-Executes the code reference C<$code> with arguments C<@args> as if it were located at the subroutine stack frame pointed by C<$context>, effectively fooling C<caller> and C<die> into believing that the call actually happened higher in the stack.
+Executes the code reference C<$callback> with arguments C<@args> as if it were located at the subroutine stack frame pointed by C<$context>, effectively fooling C<caller> and C<die> into believing that the call actually happened higher in the stack.
The code is executed in the context of the C<uplevel> call, and what it returns is returned as-is by C<uplevel>.
sub target {