comment

=begin comment

# each vowel-group indicates a syllable, except for:
#  final (silent) e
#  'ia' ind two syl 

# @AddSyl and @SubSyl list regexps to massage the basic count.
# Each match from @AddSyl adds 1 to the basic count, each @SubSyl match -1
# Keep in mind that when the regexps are checked, any final 'e' will have
# been removed, and all '\'' will have been removed.

=end comment



unit module Lingua::EN::Syllable;

my @SubSyl =
    / 'cial' /,
    / 'tia' /,
    / 'cius' /,
    / 'cious' /,
    / 'giu' /,              # belgium!
    / 'ion' /,
    / 'iou' /,
    / 'sia' $ /,
    / . 'ely' $ / ,         # absolutely! (but not ely!)
;

my @AddSyl =
    / 'ia' /,
    / 'riet' /,
    / 'dien' /,
    / 'iu' /,
    / 'io' /,
    / 'ii' /,
    / <[aeiouym]> 'bl' $/,     # -Vble, plus -mble
    / <[aeiou]> ** 3/,       # agreeable
    /^ 'mc' /,
    / 'ism' $ /,             # -isms
    / (<-[aeiouy]>) $0 'l' $/,  # middle twiddle battle bottle, etc.
    / <-[l]> lien/,         # alien, salient [1]
    / ^ 'coa' <[dglx]> . / ,      # [2]
    / <-[gq]> 'ua' <-[auieo]>/,  # i think this fixes more than it breaks
    / 'dnt' $/,           # couldn't
;

# (comments refer to titan's /usr/dict/words)
# [1] alien, salient, but not lien or ebbullient...
#     (those are the only 2 exceptions i found, there may be others)
# [2] exception for 7 words:
#     coadjutor coagulable coagulate coalesce coalescent coalition coaxial

sub syllable($word is copy) is export {
    # fold contractions, remove silent e
    $word = $word.lc.subst("'", "").subst(/ 'e' $/ , "");

    # count vowel groupings, track special cases
    my $syl = $word.comb(/<[aeiouy]>+/) 
              + @AddSyl.grep(-> $re { $word ~~ $re })
              - @SubSyl.grep(-> $re { $word ~~ $re });

    # Every word has at least one syllable
    return max($syl, 1);
}



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Syllable

Lingua::EN::Syllable v1.0.3

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