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Diffstat (limited to 'old-examples/gfcc/ImperEng.gf')
| -rw-r--r-- | old-examples/gfcc/ImperEng.gf | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/old-examples/gfcc/ImperEng.gf b/old-examples/gfcc/ImperEng.gf new file mode 100644 index 000000000..6a2a10e7c --- /dev/null +++ b/old-examples/gfcc/ImperEng.gf @@ -0,0 +1,71 @@ +-- # -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) ; +} |
