Volume - extend interval support

Reviewed By: haoxuany

Differential Revision: D26255089

Pulled By: chessai

fbshipit-source-id: e4bdb0aa3c1be55dff0a5577155a3d0469d6762d

Duckling/Volume/ZH/Corpus.hs

@@ -75,6 +75,7 @@ allExamples = concat
   , examples (between Litre (2,3))
              [ "二至三公升"
              , "2-3L"
+             , "2~3公升"
              , "兩到三升"
              , "兩升到三升"
              ]

Duckling/Volume/ZH/Rules.hs

@@ -84,7 +84,7 @@ ruleIntervalBetweenNumeral = Rule
   { name = "between|from <numeral> and|to <volume>"
   , pattern =
     [ Predicate isPositive
-    , regex "-|至|到"
+    , regex "-|~|至|到"
     , Predicate isSimpleVolume
     ]
   , prod = \case
@@ -102,7 +102,7 @@ ruleIntervalBetween = Rule
   { name = "between|from <volume> to|and <volume>"
   , pattern =
     [ Predicate isSimpleVolume
-    , regex "-|至|到"
+    , regex "-|~|至|到"
     , Predicate isSimpleVolume
     ]
   , prod = \case
@@ -151,7 +151,7 @@ ruleIntervalMin :: Rule
 ruleIntervalMin = Rule
   { name = "more than <volume>"
   , pattern =
-      [ regex "至少|最少"
+      [ regex "至少|最少|起碼"
       , Predicate isSimpleVolume
       ]
     , prod = \case