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|
(*
* Pretty printer for the AST
*
* Allen Leung (leunga@cs.nyu.edu)
*)
functor MDLAstPrettyPrinter(AstUtil : MDL_AST_UTIL) : MDL_AST_PRETTY_PRINTER =
struct
structure Ast = AstUtil.Ast
open PP Ast MDLError
infix ++
fun error msg = MDLError.error("error while processing "^msg)
val goodBreak = nl'(5,3) (* if over column 75, tab and indent by 3 *)
val goodFunBreak = nl'(5,3) (* if over column 75, tab and indent by 3 *)
val comma = !! ", "
val semi = !! "; "
val cons = !! "::"
val dot = !! "."
val list = seq(!! "[",comma++goodBreak,!! "]")
val tuple = seq(!! "(",comma++goodBreak,!! ")")
val vector = seq(!! "#[",comma++goodBreak,!! "]")
val record = seq(!! "{",comma++goodBreak,!! "}")
val bars = seq(settab,nl'(5,0) ++ tab' ~2 ++ ! "|" ++ tab,unindent)
val ands = seq(settab,tab' ~4 ++ ! "and" ++ tab,unindent)
fun isAlpha "" = true
| isAlpha s = Char.isAlpha(String.sub(s,0))
fun isMLSym #"'" = false
| isMLSym #"_" = false
| isMLSym #"." = false
| isMLSym c = Char.isPunct c
fun isComplex s =
let fun loop(~1, alpha, sym) = alpha andalso sym
| loop(i, alpha, sym) =
let val c = String.sub(s,i)
in loop(i-1, alpha orelse Char.isAlphaNum c,
sym orelse isMLSym c)
end
in loop(String.size s - 1, false, false) end
fun encodeChar c = if isMLSym c then "_"^Int.toString(Char.ord c)
else Char.toString c
fun encodeName s = String.translate encodeChar s
fun name id = if isComplex id then encodeName id else id
fun ident(IDENT([],id)) = if isSym id then !"op" ++ ! id
else if isAlpha id then !(name id)
else sp ++ !id
| ident(IDENT(p,id)) = seq(nop,dot,nop) (map ! (p @[name id]))
and literal(WORDlit w) = word w
| literal(WORD32lit w) = word32 w
| literal(INTINFlit i) =
select
(fn "code" =>
(!"(IntInf.fromInt" ++ int(IntInf.toInt i) ++ !!")"
handle Overflow =>
!"(Option.valOf(IntInt.fromString"++string(IntInf.toString i)++ !!"))"
)
| _ => intinf i
)
| literal(INTlit i) = int i
| literal(INT32lit i) = int32 i
| literal(STRINGlit s) = string s
| literal(CHARlit c) = char c
| literal(BOOLlit b) = bool b
| literal(REALlit r) = !r
and exp(LITexp l) = literal l
| exp(IDexp id) = ident id
| exp(CONSexp(id,e)) = ident id ++ sp ++ exp' e
| exp(LISTexp(es,NONE)) = if length es >= 10 then longlistexp es
else list (map appexp es)
| exp(LISTexp([],SOME e)) = exp e
| exp(LISTexp(es,SOME e)) = seq(nop,cons,cons) (map exp es) ++ exp e
| exp(TUPLEexp [e]) = exp e
| exp(TUPLEexp es) = tuple (map appexp es)
| exp(VECTORexp es) = vector (map appexp es)
| exp(RECORDexp es) = record(map labexp es)
| exp(SEQexp []) = ! "()"
| exp(SEQexp [e]) = exp e
| exp(SEQexp es) = nl ++ tab ++
seq(! "(" ++ sp ++
settab,semi++nl++tab,unindent ++ tab ++ ! ")")
(map appexp es)
| exp(APPexp(e as IDexp(IDENT([],f)),e' as TUPLEexp[x,y])) =
if isSym f then
paren(exp x ++ sp ++ ! f ++ sp ++ exp y)
else
paren(exp e ++ !! " " ++ exp e')
| exp(APPexp(f,x)) = paren(appexp f ++ !! " " ++ exp x)
| exp(IFexp(x,y,z)) = paren(line(! "if" ++ sp ++ exp x) ++
block(line(! "then" ++ sp ++ exp y) ++
tab ++ ! "else" ++ sp ++ exp z))
| exp(RAISEexp e) = ! "raise" ++ exp e
| exp(HANDLEexp(e,c)) = paren(exp e ++ sp ++ ! "handle" ++ sp ++ clauses c)
| exp(CASEexp(e,c)) =
nl ++ line(! "(case" ++ sp ++ appexp e ++ sp ++ ! "of")
++ tab' 2 ++ settab ++ block(clauses c) ++ unindent ++ tab ++ !!")"
| exp(LAMBDAexp c) = group ("(",")") (! "fn" ++ sp ++ clauses c)
| exp(LETexp([],e)) = expseq e
| exp(LETexp(d,e)) = nl ++ tab ++ ! "let" ++ sp ++ settab ++
decls d ++ unindent ++
line(! "in" ++ sp ++ expseq e) ++ tab ++ ! "end"
| exp(TYPEDexp(e,t)) = paren(exp e ++ sp ++ !!":" ++ sp ++ ty t)
| exp(MARKexp(_,e)) = exp e
| exp(LOCexp(id,e,region)) = locexp(id,e,region)
| exp(BITSLICEexp(e,slices)) =
select(fn "code" => exp(AstUtil.BITSLICE(e,slices))
| "pretty" => exp e ++ sp ++ ! "at" ++
list(map (fn (i,j) => int i ++ !! ".." ++ int j) slices)
| mode => (error mode; nop)
)
| exp(TYPEexp t) = ty t
| exp(ASMexp a) = (error "PP.ASMexp"; nop)
| exp(RTLexp r) =
select(fn "pretty" => rtl r
| mode => (error mode; nop)
)
| exp(CONTexp(e,x)) = exp e
and rtl r = seq(!"[[",sp,!"]]") (map rtlterm r)
and rtlterm(LITrtl s) = string s
| rtlterm(IDrtl x) = ! x
and longlistexp es =
select(fn "pretty" => list(map appexp es)
| "code" => codelonglistexp es)
and prettylonglistexp es =
nl ++ tab ++ seq(! "[",comma++nl++tab,! "]") (map appexp es)
and codelonglistexp es =
nl ++
line(!"let infix $$ fun x $$ y = y::x") ++
line(!"in nil") ++
block(concat(map (fn e => line(!"$$" ++ appexp e)) (rev es))) ++
line(!"end")
and appexp(APPexp(e as IDexp(IDENT([],f)),e' as TUPLEexp[x,y])) =
if isSym f then exp x ++ sp ++ ! f ++ sp ++ exp y
else exp e ++ !! " " ++ exp e'
| appexp(APPexp(f,x)) = (appexp f ++ !! " " ++ exp x)
| appexp(SEQexp[e]) = appexp e
| appexp(TUPLEexp[e]) = appexp e
| appexp e = exp e
and exp' NONE = nop
| exp'(SOME e) = if isParenedExp e then exp e else paren(exp e)
and isParenedExp(IDexp _) = true
| isParenedExp(TUPLEexp []) = true
| isParenedExp(TUPLEexp [x]) = isParenedExp x
| isParenedExp(TUPLEexp _) = true
| isParenedExp(RECORDexp _) = true
| isParenedExp(LISTexp _) = true
| isParenedExp(VECTORexp _) = true
| isParenedExp _ = false
and isSym "+" = true
| isSym "-" = true
| isSym "*" = true
| isSym "mod" = true
| isSym "div" = true
| isSym "=" = true
| isSym "<>" = true
| isSym "<" = true
| isSym ">" = true
| isSym ">=" = true
| isSym "<=" = true
| isSym "<<" = true
| isSym ">>" = true
| isSym "~>>" = true
| isSym "||" = true
| isSym "&&" = true
| isSym "^" = true
| isSym ":=" = true
| isSym "::" = true
| isSym "@" = true
| isSym "andalso" = true
| isSym "orelse" = true
| isSym "o" = true
| isSym _ = false
and locexp(id,e,region) =
select(fn "pretty" =>
!!"$" ++ ! id ++ !!"[" ++ exp e ++
(case region of
SOME r => ! ":" ++ ! r
| NONE => nop
) ++
!!"]"
| "code" => paren(exp e ++ ! "+" ++ !("offset"^id))
| mode => (error mode; nop)
)
and decl(DATATYPEdecl(dbs,tbs)) = datatypedecl(dbs,tbs)
| decl(FUNdecl(fbs)) = fundecl fbs
| decl(RTLdecl(p,e,_)) =
line(! "rtl " ++ pat p ++ ! "=" ++ exp e)
| decl(VALdecl(vbs)) = valdecl vbs
| decl(VALSIGdecl(ids,ty)) = valsig("val",ids,ty)
| decl(RTLSIGdecl(ids,ty)) = valsig("rtl",ids,ty)
| decl(TYPESIGdecl(id,tvs)) = typesig(id,tvs)
| decl(LOCALdecl([],d2)) = decls d2
| decl(LOCALdecl(d1,d2)) =
line(! "local") ++ block(decls d1) ++ line(! "in ") ++
block(decls d2) ++ line(! "end")
| decl(SEQdecl ds) = decls ds
| decl($ ds) = concat(map line (map !! ds))
| decl(STRUCTUREdecl(id,[],s,se)) =
line(! "structure" ++ ! id ++ sigconOpt(s) ++ ! "=" ++ sexp se)
| decl(STRUCTURESIGdecl(id,se)) =
line(! "structure" ++ ! id ++ !":" ++ sigexp se)
| decl(STRUCTUREdecl(id,ds,s,se)) =
line(! "functor" ++ ! id ++ settab ++ !! "(" ++ settab ++
decls ds ++ unindent ++
tab ++ !! ")" ++ unindent ++ sigconOpt(s) ++
! "=" ++ nl ++ sexp se)
| decl(FUNCTORdecl(id,[],s,se)) =
line(! "functor" ++ ! id ++ sigconOpt(s) ++ ! "=" ++ nl ++ sexp se)
| decl(FUNCTORdecl(id,ds,s,se)) =
line(! "functor" ++ ! id ++ settab ++ !! "(" ++ settab ++
decls ds ++ unindent ++
tab ++ !! ")" ++ unindent ++ sigconOpt(s) ++
! "=" ++ nl ++ sexp se)
| decl(SIGNATUREdecl(id,se)) =
line(! "signature" ++ ! id ++ ! "=" ++ sigexp se)
| decl(OPENdecl ids) =
line(! "open" ++ seq(nop,sp,nop)(map ident ids))
| decl(INCLUDESIGdecl s) = line(! "include" ++ sigexp s)
| decl(FUNCTORARGdecl(id,se)) = ! id ++ sigcon se
| decl(EXCEPTIONdecl ebs) =
line(!"exception" ++ ands(map exceptionbind ebs))
| decl(SHARINGdecl s) = line(! "sharing" ++ ands(map share s))
| decl(MARKdecl(l,d)) =
nl++ !(SourceMapping.directive l) ++nl ++ decl d
| decl(INFIXdecl(i,ids)) = line(! "infix" ++ int i ++ concat(map ! ids))
| decl(INFIXRdecl(i,ids)) = line(! "infixr" ++ int i ++ concat(map ! ids))
| decl(NONFIXdecl ids) = line(! "nonfix" ++ concat(map ! ids))
| decl(ARCHdecl(id,ds)) =
line(! "architecture" ++ ! id ++ !"=" ++ decls ds)
| decl(BITSORDERINGdecl _) = line(! "bitsordering...")
| decl(FORMATdecl _) = line(!"instruction formats ...")
| decl(ARCHKINDdecl SUPERSCALAR) = line(!"superscalar")
| decl(ARCHKINDdecl VLIW) = line(!"vliw")
| decl(ENDIANESSdecl LITTLE) = line(!"little endian")
| decl(ENDIANESSdecl BIG) = line(!"big endian")
| decl(STORAGEdecl _) = line(!"storage ...")
| decl(LOCATIONSdecl _) = line(!"locations ...")
| decl(NAMEdecl _) = line(!"name ...")
| decl(VERSIONdecl _) = line(!"version ...")
| decl(ASSEMBLYCASEdecl _) = line(!"assembly ...")
| decl(INSTRUCTIONdecl cbs) = line(!"instruction" ++
tab' ~6 ++ consbinds cbs)
| decl(DEBUGdecl _) = line(!"debug ...")
| decl(RESOURCEdecl _) = line(!"resource ...")
| decl(CPUdecl _) = line(!"cpu ...")
| decl(PIPELINEdecl _) = line(!"pipeline ...")
| decl(LATENCYdecl _) = line(!"latency ...")
and exceptionbind(EXCEPTIONbind(id,NONE)) = ! id
| exceptionbind(EXCEPTIONbind(id,SOME t)) = !id ++ !"of" ++ ty t
| exceptionbind(EXCEPTIONEQbind(id,id')) = !id ++ !"=" ++ ident id'
and share(TYPEshare ids) = !"type" ++ seq(nop,! "=",nop) (map ident ids)
| share(STRUCTshare ids) = seq(nop,! "=",nop) (map ident ids)
and sigexp(IDsig id) = ident id
| sigexp(WHEREsig(se,x,s)) =
sigexp se ++ !"where" ++ ident x ++ !! "=" ++ sexp s
| sigexp(WHERETYPEsig(se,x,t)) =
sigexp se ++ !"where type" ++ ident x ++ !! "=" ++ ty t
| sigexp(DECLsig ds) = line(!"sig") ++ block(decls ds) ++ line(!"end")
and sigconOpt(NONE) = nop
| sigconOpt(SOME s) = sigcon s
and sigcon{abstract=false,sigexp=s} = !":" ++ sigexp s
| sigcon{abstract=true,sigexp=s} = !":>" ++ sigexp s
and sexp (IDsexp id) = ident id
| sexp (APPsexp(a,DECLsexp ds)) = sexp a ++ nl ++
block(line(group("(",")") (decls ds)))
| sexp (APPsexp(a,IDsexp id)) = sexp a ++ paren(ident id)
| sexp (APPsexp(a,b)) = sexp a ++ nl ++ paren(sexp b)
| sexp (DECLsexp ds) = line(!"struct") ++ block(decls ds) ++ line(!"end")
| sexp (CONSTRAINEDsexp(s,si)) = sexp s ++ !":" ++ sigexp si
and decls ds = concat (map decl ds)
and valsig (keyword,[],t) = nop
| valsig (keyword,id::ids,t) =
line(! keyword ++ ! id ++ ! ":" ++ sp ++ ty t) ++
valsig(keyword,ids,t)
and typesig (id,tvs) = line(! "type" ++ tyvars tvs ++ ! id)
and expseq es = block(seq(nop,semi++nl++tab,nop) (map appexp es))
and labexp(id,e) = ! id ++ !! "=" ++ appexp e
and ty(IDty id) = ident id
| ty(TYVARty tv) = tyvar tv
| ty(APPty(id,[t])) = pty t ++ sp ++ ident id
| ty(APPty(id,tys)) = tuple(map ty tys) ++ sp ++ ident id
| ty(FUNty(x,y)) = ty x ++ !! " -> " ++ fty y
| ty(TUPLEty []) = ! "unit"
| ty(TUPLEty [t]) = ty t
| ty(TUPLEty tys) = seq(nop,!! " * ",nop) (map pty tys)
| ty(RECORDty labtys) = record(map labty labtys)
| ty(CELLty id) =
select( fn "pretty" => !!"$" ++ !id
| "code" => !(if id = "cellset" then "C.cellset"
else "CellsBasis.cell")
| mode => (error mode; nop)
)
| ty(VARty(TYPEkind,i,_,ref NONE)) = !("'X"^Int.toString i)
| ty(VARty(INTkind,i,_,ref NONE)) =
select (fn "pretty" => !("#X"^Int.toString i)
| "code" => !("T"^Int.toString i))
| ty(VARty(_,_,_,ref(SOME t))) = ty t
| ty(POLYty(vars,t)) = ty t
| ty(INTVARty i) = select (fn "pretty" => !!"#" ++ int i
| "code" => int i)
| ty(LAMBDAty(vars,t)) = !!"\\" ++ tuple(map ty vars) ++ !!"." ++ ty t
and fty(t as FUNty _) = ty t
| fty t = pty t
and pty(t as FUNty _) = paren(ty t)
| pty(TUPLEty[t]) = pty t
| pty(t as TUPLEty []) = ty t
| pty(t as TUPLEty _) = paren(ty t)
| pty(t as RECORDty _) = ty t
| pty(t as IDty _) = ty t
| pty(t as APPty _) = ty t
| pty(t as VARty _) = ty t
| pty(t as TYVARty _) = ty t
| pty t = paren(ty t)
and labty (id,t) = ! id ++ !! ":" ++ ty t
and pat(IDpat id) = if isSym id then !"op" ++ !id else !(name id)
| pat(WILDpat) = ! "_"
| pat(ASpat(id,p)) = paren(!id ++ !"as" ++ sp ++ pat p)
| pat(LITpat l) = literal l
| pat(LISTpat(ps,NONE)) = list(map pat ps)
| pat(LISTpat([],SOME p)) = pat p
| pat(LISTpat(ps,SOME p)) = seq(nop,cons,cons) (map pat ps) ++ pat p
| pat(TUPLEpat [p]) = pat p
| pat(TUPLEpat ps) = tuple(map pat ps)
| pat(VECTORpat ps) = vector(map pat ps)
| pat(RECORDpat(lps,flex)) =
record(map labpat lps @ (if flex then [! "..."] else []))
| pat(TYPEDpat(p,t)) = paren(pat p ++ !! ":" ++ ty t)
| pat(CONSpat(id,NONE)) = ident id
| pat(CONSpat(IDENT([],"::"),SOME(TUPLEpat[x,y]))) =
paren(pat x ++ sp ++ !!"::" ++ sp ++ pat y)
| pat(CONSpat(id,SOME p)) = ident id ++ ppat p
| pat(ORpat [p]) = pat p
| pat(ORpat ps) =
if length ps > 10
then nl ++ tab ++ seq(! "(",! "|"++nl++tab,! ")") (map pat ps)
else seq(!! "(", ! "|"++sp, !! ")") (map pat ps)
| pat(ANDpat [p]) = pat p
| pat(ANDpat ps) = seq(!! "(",sp ++ !"and" ++ sp, !!")") (map pat ps)
| pat(NOTpat p) = !"not" ++ sp ++ pat p
| pat(WHEREpat(p,e)) = pat p ++ sp ++ !"where" ++ sp ++ exp e
| pat(NESTEDpat(p,e,p')) = pat p ++ sp ++ !"where" ++ sp ++ exp e ++
sp ++ !"in" ++ sp ++ pat p'
and ppat(p as (CONSpat _ | ASpat _)) = paren(pat p)
| ppat p = pat p
and pats ps = concat(map pat ps)
and ppats ps = concat(map (fn p => ppat p ++ sp) ps)
and labpat(id,p as IDpat id') =
if id = id' then ! id
else ! id ++ !! "=" ++ pat p
| labpat(id,p) = ! id ++ !! "=" ++ pat p
and funbind(FUNbind(id,c)) = bars (map (funclause id) c)
and funbinds fbs = ands (map funbind fbs)
and funclause id (CLAUSE(ps,g,e)) =
line(!(name id) ++ sp ++ ppats ps ++ sp ++ guard g ++ ! "=" ++
sp ++ goodFunBreak ++ appexp e)
and guard NONE = nop
| guard (SOME e) = ! "where" ++ sp ++ appexp e ++ sp
and clause (CLAUSE([p],g,e)) =
line(settab ++ pat p ++ sp ++ guard g ++
! "=>" ++ sp ++ goodFunBreak ++ appexp e ++ unindent)
| clause (CLAUSE(ps,g,e)) =
line(settab ++ ppats ps ++ sp ++ guard g ++
! "=>" ++ sp ++ appexp e ++ unindent)
and clauses c = block(bars (map clause c))
and fundecl [] = nop
| fundecl fbs = (* nl ++ *) tab ++ ! "fun" ++ sp ++ settab ++
funbinds fbs ++ unindent
and valbind (VALbind(p,e)) =
line(settab ++ pat p ++ sp ++ ! "=" ++ sp ++ appexp e ++ unindent)
and valbinds vbs = block(ands (map valbind vbs))
and valdecl [] = nop
| valdecl vbs = tab ++ ! "val" ++ sp ++ valbinds vbs
and datatypebind(DATATYPEbind{id,tyvars=ts,cbs,...}) =
line(tyvars ts ++ ! id ++ ! "=") ++
tab' ~6 ++ consbinds cbs
| datatypebind(DATATYPEEQbind{id,tyvars=ts,ty=t,...}) =
line(tyvars ts ++ ! id ++ ! "=" ++ !"datatype" ++ ty t)
and datatypebinds ds = block(ands(map datatypebind ds))
and consbinds cbs = bars(map consbind cbs)
and consbind(CONSbind{id,ty=NONE,...}) = line(! id)
| consbind(CONSbind{id,ty=SOME t,...}) = line(! id ++ ! "of" ++ sp ++ ty t)
and typebind(TYPEbind(id,ts,t)) =
line (tyvars ts ++ !id ++ ! "=" ++ sp ++ ty t)
and typebinds tbs = block(ands (map typebind tbs))
and tyvars [] = nop
| tyvars [t] = tyvar t
| tyvars tvs = tuple(map tyvar tvs)
and tyvar (VARtv tv) = ! tv
| tyvar (INTtv tv) = sp ++ !! "#" ++ ! tv
and range(x,y) = paren(int x ++ comma ++ int y)
and datatypedecl([],t) = tab ++ ! "type" ++ block(ands (map typebind t))
| datatypedecl(d,t) =
tab ++ ! "datatype" ++
datatypebinds d ++
(case t of
[] => nop
| _ => tab ++ ! "withtype" ++ typebinds t
)
end
|
