in reply to
Re^2: Where to find info on low level perl internals names?
in thread Where to find info on low level perl internals names?
32bit chars? 64bit chars?
32 on 32 bit builds. 64 on 64 bit builds. The format actually allows for 72 bit numbers, but Perl doesn't provide a means of storing and fetching values that large.
UTF 16? UTF 32? UTF 64
Are you asking about the format? It's a variable width format based on UTF-8 confusingly called utf8, but it has nothing to do with Unicode. For starters, the highest possible Unicode character is only 0x10FFFF, far less than what utf8 allows. Unicode has a bunch of reserved and private use and whatnot code points, but not these strings. Unicode imposes certain semantics, but not these strings.