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(*

See [1] for the theory behind the analysis


[1] https://fr.m.wiktionary.org/wiki/Annexe:Prononciation/fran%C3%A7ais#Structure_syllabique


   *)
%parameter<T:Sounds.T>



%{

    module P = Process.M(T)

%}
%start<T.t List.t> main

%%

occlusiv:
  | P               { T.p }
  | B               { T.b }

  | T               { T.t }
  | D               { T.d }

  | K               { T.k }
  | G               { T.g }

fricativ:
  | S               { T.s () }
  | SZ              { T.sz () }
  | Z               { T.z () }

  | F               { T.f }

  | X               { T.ch () }

obstruent:
  | occlusiv        { $1 }
  | fricativ        { $1 }

liquid:
  | L               { T.l () }
  | R               { T.r () }

nasal:
  | N               { T.n }
  | M               { T.m }

consonant: 
  | occlusiv        { $1 }
  | fricativ        { $1 }
  | liquid          { $1 }
  | nasal           { $1 }

semi_voyel: 
  | Y               { T.none }
  | W               { T.semi_voyel_w }

opening_consonant:
  | occlusiv            { $1, None }
  | fricativ            { $1, None }
  | nasal               { $1, None }
  | liquid              { $1, None }
  | obstruent liquid    { $1, Some $2 }
  | occlusiv fricativ   { $1, Some $2 }
  | consonant semi_voyel{ $1, Some $2 }
  | semi_voyel          { $1, None }


(* Each voyel as two associated sounds, depending there is a followng sound or
   not *)
voyels:
  | A               { T.a          , T.a          }
  | A I             { T.e  `Opened , T.e  `Opened }
  | I               { T.i          , T.i          }
  | E               { T.e  `Opened , T.schwa () }
  | E_ACUTE E?      { T.e  `Closed , T.e  `Closed }
  | E_AGRAVE        { T.e  `Opened , T.e  `Opened }
  | E U             { T.eu `Opened , T.eu `Opened }
  | O               { T.o  `Opened , T.o  `Opened }
  | U               { T.u          , T.u          }
  | OU              { T.u'         , T.u'         }
  | W A             { T.diphtongue T.semi_voyel_w T.a, T.diphtongue T.semi_voyel_w T.a}
  | W I             { T.diphtongue T.semi_voyel_w T.i, T.diphtongue T.semi_voyel_w T.a}

nasal_voyels:
  | A N             { T.a' ()      , T.a' ()      }
  %prec Low

ending_consonant: 
  | B               { Some (T.b ) }
  | S               { Some (T.s ()) }
  | T               { None }
  | R               { Some (T.r ()) }
  | nasal           { Some $1 }

consonant_group:
  | opening_consonant 
    { 
        { ending = None 
        ; opening = [ fst $1 ]
        ; following = snd $1  }
    }
  | ending_consonant
    opening_consonant 
    { 
        { ending = Some $1 
        ; opening = [ fst $2 ]
        ; following = snd $2  }
    }

syllable:
  | c = consonant_group?
    v = voyels
    Sep?
    { (v, c) }


syllables:
  | { [] }
  | ss = syllables 
    s = syllable { s::ss }
    

word:
  | syllables consonant_group? EOL { P.rebuild $2 $1 }

main: 
  | word { $1 }