On Perl v5.22 and higher, splitting on \b{gcb} (extended grapheme cluster boundary) might be better:

$ perl -CSD -le 'print map "-$_- ", split //, "u\x{0308}ber"'
-u- -̈- -b- -e- -r- 
$ perl -CSD -le 'print map "-$_- ", split /\b{gcb}/, "u\x{0308}ber"'
-ü- -b- -e- -r- 
$ perl -CSD -le 'print map "-$_- ", split //,
    "k\x{0301}u\x{032D}o\x{0304}\x{0301}n"'
-k- -́- -u- -̭- -o- -̄- -́- -n- 
$ perl -CSD -le 'print map "-$_- ", split /\b{gcb}/,
    "k\x{0301}u\x{032D}o\x{0304}\x{0301}n"'
-ḱ- -ṷ- -ṓ- -n-

(If the 2nd and 4th outputs above aren't displaying correctly, like in my browser, they should be "-ü- -b- -e- -r-" and "-ḱ- -ṷ- -ṓ- -n-".)

As an alternative in Perl v5.12 and above, \X can be used. Update 2: E.g. split /\X\K(?=\X)/, ...

Update: Made last sentence more clear.

In reply to Re^2: How to split, join and trim leading / leading white space by haukex
in thread How to split, join and trim leading / trailing white space by thanos1983

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