syllable_separator.rb in pascoale-0.3.0

- old
+ new

@@ -2,27 +2,40 @@
   class SyllableSeparator
     include Constants
 
     ONSET = "(?:ch|lh|nh|gu|qu|[pbtdcgfv][lr]|[#{CONSONANTS}])"
 
-    # Still in doubt if we should add suffixes to the "i" semivowel...
-    # it slightly improves the the matches, but some of them causes more
-    # noise than fix things =\
-    #NUCLEUS = "(?:ãe|ão|õe|[#{VOWELS}](?:u|i(?!nh|r$|m$|dora?$|ção$|dade$))?)"
-    NUCLEUS = "(?:ãe|ão|õe|[#{VOWELS}](?:u|i(?!nh|r$|m$|ção$|dora?$))?)"
+    CODA = '[bcdfghjklmnpqrstvwxz]'
 
-    CODA = "[#{CONSONANTS}]"
+    # Biggest problem are "sinéreses" and "diéreses".
+    # It seems some consonants like "n" and "m" in the next syllable can cause it.
+    NUCLEUS_RULES = ['ãe',
+                     'ão',
+                     'õe',
+                     'au',
+                     'ou',
+                     'iu(?!m$)',
+                     '[áâàãéêíóôú][iu]',
+                     '[aieou][iu](?=[aeo])',
+                     "ai(?!m$|ns$|r$|ç[ãõ]|[nm]#{ONSET}|nh)",
+                     "eu(?![nm]#{ONSET})",
+                     "ei(?![nm]#{ONSET})",
+                     "ui(?!m$|ns$|ç[ãõ]|r$|dade$|z|[nm]#{ONSET}|nar$|d[ao]$|dora?$)",
+                     "oi(?!m$|ns$|ç[ãõ]|r$|dade$|z|[nm]#{ONSET}|nar$|dora?$)",
+                     '[aáâàãeéêiíoóôuúy]']
 
+    NUCLEUS = "(?:#{NUCLEUS_RULES.join('|')})"
+
     # The concept of "rhyme" does not help in this algorithm. It seems the
-    # concept makes no sense for syllable separation in portuguese
+    # concept makes no sense for syllable separation in portuguese (by an algorithm, at least)
     KERNEL = "#{ONSET}?#{NUCLEUS}"
 
     def initialize(word)
       @word = word
     end
 
-    def separated
+    def separate
       rest = @word
       result = []
       while rest && rest.size > 0
         if rest =~ /^(#{KERNEL})(?:(#{KERNEL})|(#{CODA})(#{KERNEL})|(#{CODA}#{CODA})(#{KERNEL})|(#{CODA}#{CODA})|(#{CODA}))?(.*)$/
           result << $1 + $3.to_s + $5.to_s + $7.to_s + $8.to_s
@@ -31,14 +44,17 @@
           # Pneu, Gnomo, Mnemônica, Pseudônimo
         elsif result.size == 0
           if rest =~ /^([#{CONSONANTS}]#{KERNEL})(?:(#{KERNEL})|(#{CODA})(#{KERNEL})|(#{CODA}#{CODA})(#{KERNEL})|(#{CODA}#{CODA})|(#{CODA}))?(.*)$/
             result << $1 + $3.to_s + $5.to_s + $7.to_s + $8.to_s
             rest = $2.to_s + $4.to_s + $6.to_s + $9.to_s
+          else
+            raise %(Cannot separate "#{@word}". No rule match next syllable at "#{result.join('')}|>#{rest}")
           end
         else
           raise %(Cannot separate "#{@word}". No rule match next syllable at "#{result.join('')}|>#{rest}")
         end
       end
       result
     end
+    alias separated separate
   end
 end