started a subdir for the book

book/examples/chapter2/Copy.gf

@@ -0,0 +1,7 @@
+concrete Copy of CopyAbs = {
+  lincat S, AB = Str ;
+  lin s x = x ++ x ;
+      end = [] ;
+      a x = "a" ++ x ;
+      b x = "b" ++ x ;
+}

book/examples/chapter2/CopyAbs.gf

@@ -0,0 +1,6 @@
+abstract CopyAbs = {
+  cat S ; AB ;
+  fun s   : AB -> S ;
+      end : AB ;
+      a,b : AB -> AB ;
+}

book/examples/chapter2/Food.gf

@@ -0,0 +1,13 @@
+abstract Food = {
+  flags startcat = Comment ;
+  cat
+    Comment ; Item ; Kind ; Quality ; 
+  fun
+    Pred : Item -> Quality -> Comment ;
+    This, That : Kind -> Item ;
+    Mod : Quality -> Kind -> Kind ;
+    Wine, Cheese, Fish : Kind ;
+    Very : Quality -> Quality ;
+    Fresh, Warm, Italian, 
+      Expensive, Delicious, Boring : Quality ;
+}

book/examples/chapter2/FoodEng.gf

@@ -0,0 +1,19 @@
+concrete FoodEng of Food = {
+  lincat
+    Comment, Item, Kind, Quality = Str ;
+  lin
+    Pred item quality = item ++ "is" ++ quality ;
+    This kind = "this" ++ kind ;
+    That kind = "that" ++ kind ;
+    Mod quality kind = quality ++ kind ;
+    Wine = "wine" ;
+    Cheese = "cheese" ;
+    Fish = "fish" ;
+    Very quality = "very" ++ quality ;
+    Fresh = "fresh" ;
+    Warm = "warm" ;
+    Italian = "Italian" ;
+    Expensive = "expensive" ;
+    Delicious = "delicious" ;
+    Boring = "boring" ;
+}  

book/examples/chapter2/FoodHin.gf

@@ -0,0 +1,24 @@
+
+ concrete FoodHin of Food = {
+   flags coding = utf8 ;
+   lincat Comment, Item, Kind, Quality = Str ;
+   lin
+     Pred item quality = item ++ quality ++ "है" ;
+     This kind = "यह" ++ kind ;
+     That kind = "वह" ++ kind ;
+     Mod quality kind = quality ++ kind ;
+     Wine = "मदिरा" ;
+     Cheese = "पनीर" ;
+     Fish = "मछली" ;
+     Very quality = "अति" ++ quality ;
+     Fresh = "ताज़ा" ;
+     Warm = "गरम" ;
+     Italian = "इटली" ; 
+     Expensive = "बहुमूल्य" ;
+     Delicious = "स्वादिष्ट" ;
+     Boring = "अरुचिकर" ;
+ }
+
+
+
+

book/examples/chapter2/FoodIta.gf

@@ -0,0 +1,19 @@
+concrete FoodIta of Food = {
+  lincat
+    Comment, Item, Kind, Quality = Str ;
+  lin
+    Pred item quality = item ++ "è" ++ quality ;
+    This kind = "questo" ++ kind ;
+    That kind = "quel" ++ kind ;
+    Mod quality kind = kind ++ quality ;
+    Wine = "vino" ;
+    Cheese = "formaggio" ;
+    Fish = "pesce" ;
+    Very quality = "molto" ++ quality ;
+    Fresh = "fresco" ;
+    Warm = "caldo" ;
+    Italian = "italiano" ;
+    Expensive = "caro" ;
+    Delicious = "delizioso" ;
+    Boring = "noioso" ;
+}

book/examples/chapter2/Letters.gf

@@ -0,0 +1,8 @@
+abstract Letters = {
+
+cat L ;
+fun 
+  a, b, c, d, e, f, g, h, i, j, k, l, m, 
+  n, o, p, q, r, s, t, u, v, w, x, y, z : L ;
+
+}

book/examples/chapter2/LettersCnc.gf

@@ -0,0 +1,31 @@
+concrete LettersCnc of Letters = {
+
+  lincat L = Str ;
+  lin 
+    a = "a" ;
+    b = "b" ;
+    c = "c" ;
+    d = "d" ;
+    e = "e" ;
+    f = "f" ;
+    g = "g" ;
+    h = "h" ;
+    i = "i" ;
+    j = "j" ;
+    k = "k" ;
+    l = "l" ;
+    m = "m" ;
+    n = "n" ;
+    o = "o" ;
+    p = "p" ;
+    q = "q" ;
+    r = "r" ;
+    s = "s" ;
+    t = "t" ;
+    u = "u" ;
+    v = "v" ;
+    w = "w" ;
+    x = "x" ;
+    y = "y" ;
+    z = "z" ;
+}

book/examples/chapter2/Strings.gf

@@ -0,0 +1,7 @@
+abstract Strings = Letters ** {
+
+cat S ;
+fun 
+  E : S ;
+  C : L -> S -> S ;
+}

book/examples/chapter2/StringsBW.gf

@@ -0,0 +1,5 @@
+concrete StringsBW of Strings = LettersCnc ** {
+  lincat S = Str ;
+  lin E = [] ;
+  lin C head tail = tail ++ head ;
+}

book/examples/chapter2/StringsFW.gf

@@ -0,0 +1,5 @@
+concrete StringsFW of Strings = LettersCnc ** {
+  lincat S = Str ;
+  lin E = [] ;
+  lin C head tail = head ++ tail ;
+}

book/examples/chapter2/Ticket.gf

@@ -0,0 +1,10 @@
+abstract Ticket = {
+
+flags startcat = Request ;
+cat
+  Request ; Station ;
+fun 
+  Ticket : Station -> Station -> Request ;
+  Hamburg, Paris : Station ;
+
+}

book/examples/chapter2/TicketEng.gf

@@ -0,0 +1,19 @@
+concrete TicketEng of Ticket = {
+
+lincat
+  Request, Station = Str ;
+lin 
+  Ticket X Y = 
+    ((("I" ++ ("would like" | "want") ++ "to get" |
+      ("may" | "can") ++ "I get" | 
+      "can you give me" |
+      []) ++ 
+        "a ticket") | 
+     []) ++ 
+     "from" ++ X ++ "to" ++ Y ++ 
+     ("please" | []) ;
+
+  Hamburg = "Hamburg" ;
+  Paris = "Paris" ;
+
+}