gf-book web page index and toc

gf-book/examples/chapter7/Map.gf

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+abstract Map = {
+flags startcat = Query ;
+cat
+  Query ; Input ; Place ; Click ;
+fun
+  GoFromTo   : Place -> Place -> Input ;
+  ThisPlace  : Click -> Place ;
+  QueryInput : Input -> Query ;
+  ClickCoord : Int -> Int -> Click ;
+}

gf-book/examples/chapter7/MapEng.gf

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+concrete MapEng of Map = {
+lincat
+  Query        = {s : Str} ;
+  Input, Place = {s : Str ; p : Str} ;
+  Click        = {p : Str} ;
+lin
+  GoFromTo x y = {
+    s = "I want to go from" ++ x.s ++ "to" ++ y.s ; 
+    p = x.p ++ y.p
+    } ;
+  ThisPlace c = {
+    s = "this place" ; 
+    p = c.p
+    } ;
+  QueryInput i = {s = i.s ++ ";" ++ i.p} ;
+  ClickCoord x y = {p = "(" ++ x.s ++ "," ++ y.s ++ ")"} ;
+}

gf-book/examples/chapter7/Query.gf

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+abstract Query = {
+  flags startcat=Question ;
+  cat 
+    Answer ; Question ; Object ;
+  fun 
+    Even   : Object -> Question ;
+    Odd    : Object -> Question ;
+    Prime  : Object -> Question ;
+    Number : Int -> Object ;
+    Yes    : Answer ;
+    No     : Answer ;
+}

gf-book/examples/chapter7/QueryEng.gf

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+concrete QueryEng of Query = {
+  lincat 
+    Answer, Question, Object = Str ;
+  lin 
+    Even  = pred "even" ;
+    Odd   = pred "odd" ;
+    Prime = pred "prime" ;
+    Number i = i.s ;
+    Yes = "yes" ;
+    No = "no" ;
+  oper
+    pred : Str -> Str -> Str = \f,x -> "is" ++ x ++ f ;
+}

gf-book/examples/chapter7/QueryFin.gf

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+concrete QueryFin of Query = {
+  lincat 
+    Answer, Question, Object = Str ;
+  lin 
+    Even  = pred "parillinen" ;
+    Odd   = pred "pariton" ;
+    Prime = pred "alkuluku" ;
+    Number i = i.s ;
+    Yes = "kyllä" ;
+    No = "ei" ;
+  oper
+    pred : Str -> Str -> Str = \f,x -> "onko" ++ x ++ f ;
+}