haftmann@37744: (*  Title:      Tools/Code/code_printer.ML
haftmann@28060:     Author:     Florian Haftmann, TU Muenchen
haftmann@28060: 
haftmann@28060: Generic operations for pretty printing of target language code.
haftmann@28060: *)
haftmann@28060: 
haftmann@28060: signature CODE_PRINTER =
haftmann@28060: sig
haftmann@32908:   type itype = Code_Thingol.itype
haftmann@32908:   type iterm = Code_Thingol.iterm
haftmann@32908:   type const = Code_Thingol.const
haftmann@32908:   type dict = Code_Thingol.dict
haftmann@32908: 
haftmann@35228:   val eqn_error: thm option -> string -> 'a
haftmann@28060: 
haftmann@28060:   val @@ : 'a * 'a -> 'a list
haftmann@28060:   val @| : 'a list * 'a -> 'a list
haftmann@28060:   val str: string -> Pretty.T
haftmann@28060:   val concat: Pretty.T list -> Pretty.T
haftmann@28060:   val brackets: Pretty.T list -> Pretty.T
haftmann@34178:   val enclose: string -> string -> Pretty.T list -> Pretty.T
haftmann@38778:   val commas: Pretty.T list -> Pretty.T list
haftmann@34178:   val enum: string -> string -> string -> Pretty.T list -> Pretty.T
haftmann@34178:   val enum_default: string -> string -> string -> string -> Pretty.T list -> Pretty.T
haftmann@28060:   val semicolon: Pretty.T list -> Pretty.T
haftmann@33989:   val doublesemicolon: Pretty.T list -> Pretty.T
haftmann@34178:   val indent: int -> Pretty.T -> Pretty.T
haftmann@55150:   val markup_stmt: Code_Symbol.T -> Pretty.T -> Pretty.T
haftmann@55150:   val format: Code_Symbol.T list -> int -> Pretty.T -> string
haftmann@28060: 
haftmann@30648:   val first_upper: string -> string
haftmann@30648:   val first_lower: string -> string
haftmann@30648:   type var_ctxt
haftmann@30648:   val make_vars: string list -> var_ctxt
haftmann@30648:   val intro_vars: string list -> var_ctxt -> var_ctxt
haftmann@30648:   val lookup_var: var_ctxt -> string -> string
haftmann@32913:   val intro_base_names: (string -> bool) -> (string -> string)
haftmann@32913:     -> string list -> var_ctxt -> var_ctxt
haftmann@55150:   val intro_base_names_for: (string -> bool) -> (Code_Symbol.T -> string)
haftmann@55145:     -> iterm list -> var_ctxt -> var_ctxt
haftmann@32908:   val aux_params: var_ctxt -> iterm list list -> string list
haftmann@30648: 
haftmann@31056:   type literals
haftmann@31056:   val Literals: { literal_char: string -> string, literal_string: string -> string,
haftmann@37958:         literal_numeral: int -> string,
haftmann@31056:         literal_list: Pretty.T list -> Pretty.T, infix_cons: int * string }
haftmann@31056:     -> literals
haftmann@31056:   val literal_char: literals -> string -> string
haftmann@31056:   val literal_string: literals -> string -> string
haftmann@34944:   val literal_numeral: literals -> int -> string
haftmann@31056:   val literal_list: literals -> Pretty.T list -> Pretty.T
haftmann@31056:   val infix_cons: literals -> int * string
haftmann@31056: 
haftmann@28060:   type lrx
haftmann@28060:   val L: lrx
haftmann@28060:   val R: lrx
haftmann@28060:   val X: lrx
haftmann@28060:   type fixity
haftmann@28060:   val BR: fixity
haftmann@28060:   val NOBR: fixity
haftmann@28060:   val INFX: int * lrx -> fixity
haftmann@28060:   val APP: fixity
haftmann@28060:   val brackify: fixity -> Pretty.T list -> Pretty.T
haftmann@37242:   val brackify_infix: int * lrx -> fixity -> Pretty.T * Pretty.T * Pretty.T -> Pretty.T
haftmann@31665:   val brackify_block: fixity -> Pretty.T -> Pretty.T list -> Pretty.T -> Pretty.T
haftmann@50626:   val gen_applify: bool -> string -> string -> ('a -> Pretty.T) -> fixity -> Pretty.T -> 'a list -> Pretty.T
haftmann@37638:   val applify: string -> string -> ('a -> Pretty.T) -> fixity -> Pretty.T -> 'a list -> Pretty.T
haftmann@38922:   val tuplify: (fixity -> 'a -> Pretty.T) -> fixity -> 'a list -> Pretty.T option
haftmann@38922: 
haftmann@55153:   type raw_const_syntax
haftmann@55153:   val plain_const_syntax: string -> raw_const_syntax
haftmann@34152:   type simple_const_syntax
haftmann@55153:   val simple_const_syntax: simple_const_syntax -> raw_const_syntax
haftmann@37881:   type complex_const_syntax
haftmann@55153:   val complex_const_syntax: complex_const_syntax -> raw_const_syntax
haftmann@55153:   val parse_const_syntax: raw_const_syntax parser
haftmann@55153:   val requires_args: raw_const_syntax -> int
haftmann@55153:   datatype const_printer = Plain_printer of string
haftmann@55153:     | Complex_printer of (var_ctxt -> fixity -> iterm -> Pretty.T)
haftmann@55153:         -> thm option -> var_ctxt -> fixity -> (iterm * itype) list -> Pretty.T
haftmann@55153:   type const_syntax = int * const_printer
haftmann@55153:   val prep_const_syntax: theory -> literals
haftmann@55153:     -> string -> raw_const_syntax -> const_syntax
haftmann@52070:   type tyco_syntax
wenzelm@52079:   val parse_tyco_syntax: tyco_syntax parser
haftmann@35228:   val gen_print_app: (thm option -> var_ctxt -> const * iterm list -> Pretty.T list)
haftmann@35228:     -> (thm option -> var_ctxt -> fixity -> iterm -> Pretty.T)
haftmann@55153:     -> (string -> const_syntax option)
haftmann@35228:     -> thm option -> var_ctxt -> fixity -> const * iterm list -> Pretty.T
haftmann@35228:   val gen_print_bind: (thm option -> var_ctxt -> fixity -> iterm -> Pretty.T)
haftmann@35228:     -> thm option -> fixity
haftmann@31889:     -> iterm -> var_ctxt -> Pretty.T * var_ctxt
haftmann@28060: end;
haftmann@28060: 
haftmann@28060: structure Code_Printer : CODE_PRINTER =
haftmann@28060: struct
haftmann@28060: 
haftmann@55150: open Basic_Code_Symbol;
haftmann@28060: open Code_Thingol;
haftmann@28060: 
haftmann@39034: (** generic nonsense *)
haftmann@39034: 
wenzelm@43947: fun eqn_error (SOME thm) s =
wenzelm@43947:       error (s ^ ",\nin equation " ^ Display.string_of_thm_without_context thm)
haftmann@35228:   | eqn_error NONE s = error s;
haftmann@28060: 
haftmann@39034: val code_presentationN = "code_presentation";
haftmann@39057: val stmt_nameN = "stmt_name";
haftmann@39034: val _ = Markup.add_mode code_presentationN YXML.output_markup;
haftmann@39034: 
haftmann@39034: 
haftmann@34071: (** assembling and printing text pieces **)
haftmann@28060: 
haftmann@28060: infixr 5 @@;
haftmann@28060: infixr 5 @|;
haftmann@28060: fun x @@ y = [x, y];
haftmann@28060: fun xs @| y = xs @ [y];
haftmann@39660: val str = Print_Mode.setmp [] Pretty.str;
haftmann@28060: val concat = Pretty.block o Pretty.breaks;
haftmann@39660: val commas = Print_Mode.setmp [] Pretty.commas;
haftmann@39660: fun enclose l r = Print_Mode.setmp [] (Pretty.enclose l r);
haftmann@34178: val brackets = enclose "(" ")" o Pretty.breaks;
haftmann@39660: fun enum sep l r = Print_Mode.setmp [] (Pretty.enum sep l r);
haftmann@34178: fun enum_default default sep l r [] = str default
haftmann@34178:   | enum_default default sep l r xs = enum sep l r xs;
haftmann@28060: fun semicolon ps = Pretty.block [concat ps, str ";"];
haftmann@33989: fun doublesemicolon ps = Pretty.block [concat ps, str ";;"];
haftmann@39660: fun indent i = Print_Mode.setmp [] (Pretty.indent i);
haftmann@28060: 
haftmann@55147: fun markup_stmt sym = Print_Mode.setmp [code_presentationN]
haftmann@55147:   (Pretty.mark (code_presentationN, [(stmt_nameN, Code_Symbol.marker sym)]));
haftmann@39062: 
haftmann@39558: fun filter_presentation [] tree =
haftmann@39558:       Buffer.empty
wenzelm@43947:       |> fold XML.add_content tree
haftmann@55147:   | filter_presentation presentation_syms tree =
haftmann@39057:       let
haftmann@55147:         val presentation_idents = map Code_Symbol.marker presentation_syms
wenzelm@43947:         fun is_selected (name, attrs) =
haftmann@39558:           name = code_presentationN
haftmann@55147:           andalso member (op =) presentation_idents (the (Properties.get attrs stmt_nameN));
haftmann@39558:         fun add_content_with_space tree (is_first, buf) =
haftmann@39558:           buf
haftmann@39558:           |> not is_first ? Buffer.add "\n\n"
haftmann@39558:           |> XML.add_content tree
haftmann@39558:           |> pair false;
haftmann@39558:         fun filter (XML.Elem (name_attrs, xs)) =
haftmann@39558:               fold (if is_selected name_attrs then add_content_with_space else filter) xs
haftmann@47576:           | filter (XML.Text _) = I;
haftmann@39558:       in snd (fold filter tree (true, Buffer.empty)) end;
haftmann@39062: 
haftmann@39062: fun format presentation_names width =
haftmann@39660:   Print_Mode.setmp [code_presentationN] (Pretty.string_of_margin width)
haftmann@39062:   #> YXML.parse_body
haftmann@39558:   #> filter_presentation presentation_names
haftmann@39678:   #> Buffer.add "\n"
haftmann@39558:   #> Buffer.content;
haftmann@34071: 
haftmann@28060: 
haftmann@30648: (** names and variable name contexts **)
haftmann@30648: 
haftmann@30648: type var_ctxt = string Symtab.table * Name.context;
haftmann@30648: 
haftmann@30648: fun make_vars names = (fold (fn name => Symtab.update_new (name, name)) names Symtab.empty,
haftmann@30648:   Name.make_context names);
haftmann@30648: 
haftmann@30648: fun intro_vars names (namemap, namectxt) =
haftmann@30648:   let
wenzelm@43326:     val (names', namectxt') = fold_map Name.variant names namectxt;
haftmann@30648:     val namemap' = fold2 (curry Symtab.update) names names' namemap;
haftmann@30648:   in (namemap', namectxt') end;
haftmann@30648: 
wenzelm@43947: fun lookup_var (namemap, _) name =
wenzelm@43947:   case Symtab.lookup namemap name of
wenzelm@43947:     SOME name' => name'
haftmann@30648:   | NONE => error ("Invalid name in context: " ^ quote name);
haftmann@30648: 
wenzelm@40627: val first_upper = implode o nth_map 0 Symbol.to_ascii_upper o raw_explode;
wenzelm@40627: val first_lower = implode o nth_map 0 Symbol.to_ascii_lower o raw_explode;
haftmann@30648: 
haftmann@32908: fun aux_params vars lhss =
haftmann@32908:   let
haftmann@32908:     fun fish_param _ (w as SOME _) = w
haftmann@32908:       | fish_param (IVar (SOME v)) NONE = SOME v
haftmann@32908:       | fish_param _ NONE = NONE;
haftmann@32908:     fun fillup_param _ (_, SOME v) = v
haftmann@32908:       | fillup_param x (i, NONE) = x ^ string_of_int i;
haftmann@32908:     val fished1 = fold (map2 fish_param) lhss (replicate (length (hd lhss)) NONE);
wenzelm@43324:     val x = singleton (Name.variant_list (map_filter I fished1)) "x";
haftmann@32908:     val fished2 = map_index (fillup_param x) fished1;
wenzelm@43326:     val (fished3, _) = fold_map Name.variant fished2 Name.context;
haftmann@32908:     val vars' = intro_vars fished3 vars;
haftmann@32908:   in map (lookup_var vars') fished3 end;
haftmann@32908: 
haftmann@55145: fun intro_base_names no_syntax deresolve =
haftmann@55145:   map_filter (fn name => if no_syntax name then
haftmann@32913:       let val name' = deresolve name in
haftmann@32913:         if Long_Name.is_qualified name' then NONE else SOME name'
haftmann@32913:       end else NONE)
haftmann@55145:   #> intro_vars;
haftmann@55145: 
haftmann@55145: fun intro_base_names_for no_syntax deresolve ts =
haftmann@55145:   []
haftmann@55147:   |> fold Code_Thingol.add_constsyms ts 
haftmann@55150:   |> intro_base_names (fn Constant const => no_syntax const | _ => true) deresolve;
haftmann@32913: 
haftmann@30648: 
haftmann@31056: (** pretty literals **)
haftmann@31056: 
haftmann@31056: datatype literals = Literals of {
haftmann@31056:   literal_char: string -> string,
haftmann@31056:   literal_string: string -> string,
haftmann@34944:   literal_numeral: int -> string,
haftmann@31056:   literal_list: Pretty.T list -> Pretty.T,
haftmann@31056:   infix_cons: int * string
haftmann@31056: };
haftmann@31056: 
haftmann@31056: fun dest_Literals (Literals lits) = lits;
haftmann@31056: 
haftmann@31056: val literal_char = #literal_char o dest_Literals;
haftmann@31056: val literal_string = #literal_string o dest_Literals;
haftmann@31056: val literal_numeral = #literal_numeral o dest_Literals;
haftmann@31056: val literal_list = #literal_list o dest_Literals;
haftmann@31056: val infix_cons = #infix_cons o dest_Literals;
haftmann@31056: 
haftmann@31056: 
haftmann@28060: (** syntax printer **)
haftmann@28060: 
haftmann@28060: (* binding priorities *)
haftmann@28060: 
haftmann@28060: datatype lrx = L | R | X;
haftmann@28060: 
haftmann@28060: datatype fixity =
haftmann@28060:     BR
haftmann@28060:   | NOBR
haftmann@28060:   | INFX of (int * lrx);
haftmann@28060: 
haftmann@28060: val APP = INFX (~1, L);
haftmann@28060: 
haftmann@28060: fun fixity_lrx L L = false
haftmann@28060:   | fixity_lrx R R = false
haftmann@28060:   | fixity_lrx _ _ = true;
haftmann@28060: 
haftmann@28060: fun fixity NOBR _ = false
haftmann@28060:   | fixity _ NOBR = false
haftmann@52433:   | fixity (INFX (pr, lr)) (INFX (pr_ctxt, lr_ctxt)) =
haftmann@52433:       pr < pr_ctxt
haftmann@52433:       orelse pr = pr_ctxt
haftmann@28060:         andalso fixity_lrx lr lr_ctxt
haftmann@52433:       orelse pr_ctxt = ~1
haftmann@28060:   | fixity BR (INFX _) = false
haftmann@28060:   | fixity _ _ = true;
haftmann@28060: 
haftmann@28060: fun gen_brackify _ [p] = p
haftmann@34178:   | gen_brackify true (ps as _::_) = enclose "(" ")" ps
haftmann@28060:   | gen_brackify false (ps as _::_) = Pretty.block ps;
haftmann@28060: 
haftmann@28060: fun brackify fxy_ctxt =
haftmann@28060:   gen_brackify (fixity BR fxy_ctxt) o Pretty.breaks;
haftmann@28060: 
haftmann@37242: fun brackify_infix infx fxy_ctxt (l, m, r) =
haftmann@50627:   gen_brackify (fixity (INFX infx) fxy_ctxt) [l, str " ", m, Pretty.brk 1, r];
haftmann@28060: 
haftmann@31665: fun brackify_block fxy_ctxt p1 ps p2 =
haftmann@31665:   let val p = Pretty.block_enclose (p1, p2) ps
haftmann@31665:   in if fixity BR fxy_ctxt
haftmann@34178:     then enclose "(" ")" [p]
haftmann@31665:     else p
haftmann@31665:   end;
haftmann@31665: 
haftmann@50626: fun gen_applify strict opn cls f fxy_ctxt p [] =
haftmann@50626:       if strict
haftmann@50628:       then gen_brackify (fixity BR fxy_ctxt) [p, str (opn ^ cls)]
haftmann@50626:       else p
haftmann@50626:   | gen_applify strict opn cls f fxy_ctxt p ps =
haftmann@50627:       gen_brackify (fixity BR fxy_ctxt) (p @@ enum "," opn cls (map f ps));
haftmann@34247: 
haftmann@50626: fun applify opn = gen_applify false opn;
haftmann@50626: 
haftmann@38922: fun tuplify _ _ [] = NONE
haftmann@38922:   | tuplify print fxy [x] = SOME (print fxy x)
haftmann@38922:   | tuplify print _ xs = SOME (enum "," "(" ")" (map (print NOBR) xs));
haftmann@38922: 
haftmann@28060: 
haftmann@52070: (* generic syntax *)
haftmann@34152: 
haftmann@34152: type simple_const_syntax = int * ((fixity -> iterm -> Pretty.T)
haftmann@34152:   -> fixity -> (iterm * itype) list -> Pretty.T);
haftmann@37881: 
haftmann@55148: type complex_const_syntax = int * (literals
haftmann@31056:   -> (var_ctxt -> fixity -> iterm -> Pretty.T)
haftmann@55148:     -> thm option -> var_ctxt -> fixity -> (iterm * itype) list -> Pretty.T);
haftmann@37881: 
haftmann@55153: datatype raw_const_syntax = plain_const_syntax of string
haftmann@37881:   | complex_const_syntax of complex_const_syntax;
haftmann@37881: 
haftmann@34176: fun simple_const_syntax syn =
wenzelm@43947:   complex_const_syntax
haftmann@55148:     (apsnd (fn f => fn _ => fn print => fn _ => fn vars => f (print vars)) syn);
haftmann@28060: 
haftmann@55153: fun requires_args (plain_const_syntax _) = 0
haftmann@55153:   | requires_args (complex_const_syntax (k, _)) = k;
haftmann@55153: 
haftmann@55153: datatype const_printer = Plain_printer of string
haftmann@55153:   | Complex_printer of (var_ctxt -> fixity -> iterm -> Pretty.T)
haftmann@55153:       -> thm option -> var_ctxt -> fixity -> (iterm * itype) list -> Pretty.T;
haftmann@37881: 
haftmann@55153: type const_syntax = int * const_printer;
haftmann@31056: 
haftmann@55153: fun prep_const_syntax thy literals c (plain_const_syntax s) =
haftmann@55153:       (Code.args_number thy c, Plain_printer s)
haftmann@55153:   | prep_const_syntax thy literals c (complex_const_syntax (n, f))=
haftmann@55153:       (n, Complex_printer (f literals));
haftmann@37881: 
wenzelm@43947: fun gen_print_app print_app_expr print_term const_syntax some_thm vars fxy
haftmann@55147:     (app as ({ sym, dom, ... }, ts)) =
haftmann@55147:   case sym of
haftmann@55150:     Constant const => (case const_syntax const of
haftmann@55147:       NONE => brackify fxy (print_app_expr some_thm vars app)
haftmann@55153:     | SOME (_, Plain_printer s) =>
haftmann@55147:         brackify fxy (str s :: map (print_term some_thm vars BR) ts)
haftmann@55153:     | SOME (k, Complex_printer print) =>
haftmann@55147:         let
haftmann@55147:           fun print' fxy ts =
haftmann@55147:             print (print_term some_thm) some_thm vars fxy (ts ~~ take k dom);
haftmann@55147:         in
haftmann@55147:           if k = length ts
haftmann@55147:           then print' fxy ts
haftmann@55147:           else if k < length ts
haftmann@55147:           then case chop k ts of (ts1, ts2) =>
haftmann@55147:             brackify fxy (print' APP ts1 :: map (print_term some_thm vars BR) ts2)
haftmann@55147:           else print_term some_thm vars fxy (Code_Thingol.eta_expand k app)
haftmann@55147:         end)
haftmann@55147:   | _ => brackify fxy (print_app_expr some_thm vars app);
haftmann@28060: 
haftmann@33989: fun gen_print_bind print_term thm (fxy : fixity) pat vars =
haftmann@28060:   let
haftmann@31889:     val vs = Code_Thingol.fold_varnames (insert (op =)) pat [];
haftmann@31874:     val vars' = intro_vars vs vars;
haftmann@33989:   in (print_term thm vars' fxy pat, vars') end;
haftmann@28060: 
haftmann@52070: type tyco_syntax = int * ((fixity -> itype -> Pretty.T)
haftmann@52070:   -> fixity -> itype list -> Pretty.T);
haftmann@52070: 
haftmann@28060: 
haftmann@28060: (* mixfix syntax *)
haftmann@28060: 
haftmann@28060: datatype 'a mixfix =
haftmann@28060:     Arg of fixity
haftmann@37881:   | String of string
haftmann@37881:   | Break;
haftmann@28060: 
haftmann@52069: fun printer_of_mixfix prep_arg (fixity_this, mfx) =
haftmann@28060:   let
haftmann@28060:     fun is_arg (Arg _) = true
haftmann@28060:       | is_arg _ = false;
haftmann@28060:     val i = (length o filter is_arg) mfx;
haftmann@28060:     fun fillin _ [] [] =
haftmann@28060:           []
haftmann@33989:       | fillin print (Arg fxy :: mfx) (a :: args) =
haftmann@33989:           (print fxy o prep_arg) a :: fillin print mfx args
haftmann@37881:       | fillin print (String s :: mfx) args =
haftmann@37881:           str s :: fillin print mfx args
haftmann@37881:       | fillin print (Break :: mfx) args =
haftmann@37881:           Pretty.brk 1 :: fillin print mfx args;
haftmann@28060:   in
haftmann@33989:     (i, fn print => fn fixity_ctxt => fn args =>
haftmann@33989:       gen_brackify (fixity fixity_this fixity_ctxt) (fillin print mfx args))
haftmann@28060:   end;
haftmann@28060: 
haftmann@52069: fun read_infix (fixity_this, i) s =
haftmann@28060:   let
haftmann@52069:     val l = case fixity_this of L => INFX (i, L) | _ => INFX (i, X);
haftmann@52069:     val r = case fixity_this of R => INFX (i, R) | _ => INFX (i, X);
haftmann@28060:   in
haftmann@52069:     (INFX (i, fixity_this), [Arg l, String " ", String s, Break, Arg r])
haftmann@28060:   end;
haftmann@28060: 
haftmann@52069: fun read_mixfix s =
haftmann@28060:   let
haftmann@28060:     val sym_any = Scan.one Symbol.is_regular;
haftmann@52069:     val parse = Scan.optional ($$ "!" >> K NOBR) BR -- Scan.repeat (
haftmann@28060:          ($$ "(" -- $$ "_" -- $$ ")" >> K (Arg NOBR))
haftmann@28060:       || ($$ "_" >> K (Arg BR))
haftmann@37881:       || ($$ "/" |-- Scan.repeat ($$ " ") >> (K Break))
haftmann@28060:       || (Scan.repeat1
haftmann@28060:            (   $$ "'" |-- sym_any
haftmann@28060:             || Scan.unless ($$ "_" || $$ "/" || $$ "(" |-- $$ "_" |-- $$ ")")
haftmann@37881:                  sym_any) >> (String o implode)));
wenzelm@43947:     fun err s (_, NONE) = (fn () => "malformed mixfix annotation: " ^ quote s)
wenzelm@43947:       | err _ (_, SOME msg) = msg;
wenzelm@43947:   in
wenzelm@43947:     case Scan.finite Symbol.stopper parse (Symbol.explode s) of
haftmann@52069:         (fixity_mixfix, []) => fixity_mixfix
haftmann@52069:       | _ => Scan.!! (err s) Scan.fail ()
haftmann@28060:   end;
haftmann@28060: 
haftmann@52069: val parse_fixity =
haftmann@52069:   (@{keyword "infix"} >> K X) || (@{keyword "infixl"} >> K L) || (@{keyword "infixr"} >> K R)
haftmann@52069: 
wenzelm@52099: fun parse_mixfix x =
wenzelm@52099:   (Parse.string >> read_mixfix
haftmann@52069:   || parse_fixity -- Parse.nat -- Parse.string
wenzelm@52099:      >> (fn ((fixity, i), s) => read_infix (fixity, i) s)) x;
haftmann@28060: 
haftmann@52069: fun syntax_of_mixfix of_plain of_printer prep_arg (BR, [String s]) = of_plain s
haftmann@52069:   | syntax_of_mixfix of_plain of_printer prep_arg (fixity, mfx) =
haftmann@52069:       of_printer (printer_of_mixfix prep_arg (fixity, mfx));
haftmann@37881: 
wenzelm@52099: fun parse_tyco_syntax x =
wenzelm@52099:   (parse_mixfix >> syntax_of_mixfix (fn s => (0, (K o K o K o str) s)) I I) x;
haftmann@52069: 
haftmann@52069: val parse_const_syntax =
haftmann@52069:   parse_mixfix >> syntax_of_mixfix plain_const_syntax simple_const_syntax fst;
haftmann@37881: 
haftmann@28060: end; (*struct*)