Camel case and snake case

The specs are a little vague, but taking a wild stab at it... *(May be completely wrong but without any examples of expected output it is hard to judge. This is what I would expect at least...) *

my @tests = qww<
  snakeCase  snake_case  variable_10_case  variable10Case  "ɛrgo rE tHis"
  hurry-up-joe!  c://my-docs/happy_Flag-Day/12.doc  "  spaces  "
>;


sub to_snake_case (Str $snake_case_string is copy) {
    $snake_case_string.=trim;
    return $snake_case_string if $snake_case_string.contains: / \s | '/' /;
    $snake_case_string.=subst: / <after <:Ll>> (<:Lu>|<:digit>+) /, {'_' ~ $0.lc}, :g;
    $snake_case_string.=subst: / <after <:digit>> (<:Lu>) /, {'_' ~ $0.lc}, :g;
}

sub toCamelCase (Str $CamelCaseString is copy) {
    $CamelCaseString.=trim;
    return $CamelCaseString if $CamelCaseString.contains: / \s | '/' /;
    $CamelCaseString.=subst: / ('_') (\w) /, {$1.uc}, :g;
}

sub to-kebab-case (Str $kebab-case-string is copy) {
    $kebab-case-string.=trim;
    return $kebab-case-string if $kebab-case-string.contains: / \s | '/' /;
    $kebab-case-string.=subst: / ('_') (\w) /, {'-' ~ $1.lc}, :g;
    $kebab-case-string.=subst: / <after <:Ll>> (<:Lu>|<:digit>+) /, {'-' ~ $0.lc}, :g;
    $kebab-case-string.=subst: / <after <:digit>> (<:Lu>) /, {'-' ~ $0.lc}, :g;
}

say   "{' ' x 30}to_snake_case";
printf "%33s ==> %s\n", $_, .&to_snake_case for @tests;
say "\n{' ' x 30}toCamelCase";
printf "%33s ==> %s\n", $_,   .&toCamelCase for @tests;
say "\n{' ' x 30}to-kabab-case";
printf "%33s ==> %s\n", $_, .&to-kebab-case for @tests;

Output:

                              to_snake_case
                        snakeCase ==> snake_case
                       snake_case ==> snake_case
                 variable_10_case ==> variable_10_case
                   variable10Case ==> variable_10_case
                     ɛrgo rE tHis ==> ɛrgo rE tHis
                    hurry-up-joe! ==> hurry-up-joe!
c://my-docs/happy_Flag-Day/12.doc ==> c://my-docs/happy_Flag-Day/12.doc
                         spaces   ==> spaces

                              toCamelCase
                        snakeCase ==> snakeCase
                       snake_case ==> snakeCase
                 variable_10_case ==> variable10Case
                   variable10Case ==> variable10Case
                     ɛrgo rE tHis ==> ɛrgo rE tHis
                    hurry-up-joe! ==> hurry-up-joe!
c://my-docs/happy_Flag-Day/12.doc ==> c://my-docs/happy_Flag-Day/12.doc
                         spaces   ==> spaces

                              to-kabab-case
                        snakeCase ==> snake-case
                       snake_case ==> snake-case
                 variable_10_case ==> variable-10-case
                   variable10Case ==> variable-10-case
                     ɛrgo rE tHis ==> ɛrgo rE tHis
                    hurry-up-joe! ==> hurry-up-joe!
c://my-docs/happy_Flag-Day/12.doc ==> c://my-docs/happy_Flag-Day/12.doc
                         spaces   ==> spaces