ENglish

examples/gfcc/ImperEng.gf

@@ -0,0 +1,70 @@
+--# -path=.:../../lib/prelude
+
+-- Toy English phrasing of C programs. Intended use is with 
+-- speech synthesis. Printed code should use HTML formatting.
+-- AR 5/10/2005.
+
+concrete ImperEng of Imper = open Prelude, ResImperEng in {
+  flags lexer=textvars ; unlexer=text ; startcat=Program ;
+
+  lincat
+    Rec = {s,s2,s3 : Str} ;
+
+  lin
+    Empty = ss [] ;
+    FunctNil val stm cont = ss (
+      ["The function"] ++ cont.$0 ++ 
+      "returns" ++ indef ++ val.s ++ "." ++
+      ["It is defined as follows :"] ++
+      stm.s ++
+      PARA ++ 
+      cont.s) ;
+    Funct args val rec = ss (
+      ["The function"] ++ rec.$0 ++ 
+      "takes" ++ rec.s2 ++ 
+      "and" ++ "returns" ++ indef ++ val.s ++ "." ++
+      ["It is defined as follows:"] ++
+      rec.s ++ 
+      PARA ++
+      rec.s3) ;
+
+    RecOne typ stm prg = stm ** {
+      s2 = indef ++ typ.s ++ stm.$0 ;
+      s3 = prg.s
+      } ;
+    RecCons typ _ body prg = {
+      s  = body.s ; 
+      s2 = indef ++ typ.s ++ body.$0 ++ "and" ++ body.s2 ;
+      s3 = prg.s
+      } ;
+
+    Decl  typ cont = continues ("let" ++ cont.$0 ++ "be" ++ indef ++ typ.s) cont ;
+    Assign _ x exp = continues ("set" ++ x.s ++ "to" ++ exp.s) ;
+    While exp loop = continues (["if"] ++ exp.s ++ 
+                                [", do the following :"] ++ loop.s ++ 
+       ["test the condition and repeat the loop if the condition holds"]) ;
+    IfElse exp t f = continue  ("if" ++ exp.s ++ [", then"] ++ t.s ++ "Else" ++ f.s) ;
+    Block stm      = continue  (stm.s) ;
+    Printf t e     = continues ("print" ++ e.s) ;
+    Return _ exp   = statement ("return" ++ exp.s) ;
+    Returnv        = statement ["return from the function"] ;
+    End            = ss [] ;
+ 
+    EVar  _ x  = constant x.s ;
+    EInt    n  = constant n.s ;
+    EFloat a b = constant (a.s ++ "." ++ b.s) ;
+    EMul _ _   = prefix "product" ;
+    EAdd _ _   = prefix "sum" ;
+    ESub _ _ x y = ss (["the subtraction of"] ++ y.s ++ "from" ++  x.s) ;
+    ELt _ _    = comparison "smaller" ;
+
+    EAppNil val f = constant f.s ;
+    EApp args val f exps = constant (f.s ++ ["applied to"] ++ exps.s) ;
+
+    TInt    = {s = "integer"} ; 
+    TFloat  = {s = "float"} ;
+    NilTyp  = ss [] ;
+    ConsTyp = cc2 ;
+    OneExp _ e = e ;
+    ConsExp _ _ e es = ss (e.s ++ "and" ++ es.s) ;
+}