gv_safename#
Return the GV’s name with control characters rendered as ^X.
Synopsis#
B::svref_2object(\*{"main::\cA"})->SAFENAME; # "^A"
The single-character control names (*^A, *^D, *^?) appear in the
stash with raw control bytes in their name; SAFENAME renders them in
the caret form normally used in Perl source.