toy1 in English

examples/regulus/toy1/Toy1.gf

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+abstract Toy1 = {
+
+flags startcat = Utterance ;
+
+cat 
+  Utterance ; 
+  Command ; 
+  Question ; 
+  Kind ; 
+  Action Kind ; 
+  Device Kind ; 
+  Location ;
+
+fun
+  UCommand  : Command -> Utterance ;
+  UQuestion : Question -> Utterance ;
+
+  CAction : (k : Kind) -> Action k -> Device k -> Command ;
+  QAction : (k : Kind) -> Action k -> Device k -> Question ;
+
+  DKindOne  : (k : Kind) -> Device k ;
+  DKindMany : (k : Kind) -> Device k ;
+  DLoc  : (k : Kind) -> Device k -> Location -> Device k ;
+
+  light, fan : Kind ;
+
+  switchOn, switchOff : (k : Kind) -> Action k ;
+
+  dim : Action light ;
+
+  kitchen, livingRoom : Location ;
+  
+
+}
+

examples/regulus/toy1/Toy1Eng.gf

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+--# -path=.:prelude
+
+concrete Toy1Eng of Toy1 = open Prelude in {
+
+-- grammar Toy1 from the Regulus book
+
+flags startcat = Utterance ;
+
+param
+  Number = Sg | Pl ;
+  VForm = VImp | VPart ;
+
+lincat 
+  Utterance = SS ;
+  Command = SS ;
+  Question = SS ;
+  Kind = {s : Number => Str} ; 
+  Action = {s : VForm => Str ; part : Str} ;
+  Device = {s : Str ; n : Number} ;
+  Location = SS ;
+
+lin
+  UCommand  c = c ;
+  UQuestion q = q ;
+
+  CAction _ act dev = ss (act.s ! VImp ++ bothWays act.part dev.s) ;
+  QAction _ act dev = ss (be dev.n ++ dev.s ++ act.s ! VPart ++ act.part) ;
+
+  DKindOne  k = {
+    s = "the" ++ k.s ! Sg ; 
+    n = Sg
+    } ;
+  DKindMany k = {
+    s = "the" ++ k.s ! Pl ; 
+    n = Pl
+    } ;
+  DLoc _ dev loc = {
+    s = dev.s ++ "in" ++ "the" ++ loc.s ; 
+    n = dev.n
+    } ;
+
+  light = mkNoun "light" ;
+  fan = mkNoun "fan" ;
+
+  switchOn _ = mkVerb "switch" "swithced" "on" ;
+  switchOff _ = mkVerb "switch" "swithced" "off" ;
+
+  dim = mkVerb "dim" "dimmed" [] ;
+
+  kitchen = ss "kitchen" ;
+  livingRoom = ss ["living room"] ;
+  
+oper
+  mkNoun : Str -> {s : Number => Str} = \dog -> {
+    s = table {
+      Sg => dog ;
+      Pl => dog + "s"
+      }
+    } ;
+  
+  mkVerb : (_,_,_ : Str) -> {s : VForm => Str ; part : Str} = \go,gone,away -> {
+    s = table {
+      VImp => go ;
+      VPart => gone
+      } ;
+    part = away
+    } ;
+
+  be : Number -> Str = \n -> case n of {
+    Sg => "is" ;
+    Pl => "are"
+    } ;
+
+
+}
+