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+-- # -path=.:prelude
+--# -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) ;
+}