1 (* Title: Tools/Code/code_printer.ML
2 Author: Florian Haftmann, TU Muenchen
4 Generic operations for pretty printing of target language code.
7 signature CODE_PRINTER =
9 type itype = Code_Thingol.itype
10 type iterm = Code_Thingol.iterm
11 type const = Code_Thingol.const
12 type dict = Code_Thingol.dict
14 val eqn_error: thm option -> string -> 'a
16 val @@ : 'a * 'a -> 'a list
17 val @| : 'a list * 'a -> 'a list
18 val str: string -> Pretty.T
19 val concat: Pretty.T list -> Pretty.T
20 val brackets: Pretty.T list -> Pretty.T
21 val enclose: string -> string -> Pretty.T list -> Pretty.T
22 val commas: Pretty.T list -> Pretty.T list
23 val enum: string -> string -> string -> Pretty.T list -> Pretty.T
24 val enum_default: string -> string -> string -> string -> Pretty.T list -> Pretty.T
25 val semicolon: Pretty.T list -> Pretty.T
26 val doublesemicolon: Pretty.T list -> Pretty.T
27 val indent: int -> Pretty.T -> Pretty.T
28 val markup_stmt: string -> Pretty.T -> Pretty.T
29 val format: string list -> int -> Pretty.T -> string
31 val first_upper: string -> string
32 val first_lower: string -> string
34 val make_vars: string list -> var_ctxt
35 val intro_vars: string list -> var_ctxt -> var_ctxt
36 val lookup_var: var_ctxt -> string -> string
37 val intro_base_names: (string -> bool) -> (string -> string)
38 -> string list -> var_ctxt -> var_ctxt
39 val aux_params: var_ctxt -> iterm list list -> string list
42 val Literals: { literal_char: string -> string, literal_string: string -> string,
43 literal_numeral: int -> string,
44 literal_positive_numeral: int -> string,
45 literal_alternative_numeral: int -> string,
46 literal_naive_numeral: int -> string,
47 literal_list: Pretty.T list -> Pretty.T, infix_cons: int * string }
49 val literal_char: literals -> string -> string
50 val literal_string: literals -> string -> string
51 val literal_numeral: literals -> int -> string
52 val literal_positive_numeral: literals -> int -> string
53 val literal_alternative_numeral: literals -> int -> string
54 val literal_naive_numeral: literals -> int -> string
55 val literal_list: literals -> Pretty.T list -> Pretty.T
56 val infix_cons: literals -> int * string
65 val INFX: int * lrx -> fixity
67 val brackify: fixity -> Pretty.T list -> Pretty.T
68 val brackify_infix: int * lrx -> fixity -> Pretty.T * Pretty.T * Pretty.T -> Pretty.T
69 val brackify_block: fixity -> Pretty.T -> Pretty.T list -> Pretty.T -> Pretty.T
70 val applify: string -> string -> ('a -> Pretty.T) -> fixity -> Pretty.T -> 'a list -> Pretty.T
71 val tuplify: (fixity -> 'a -> Pretty.T) -> fixity -> 'a list -> Pretty.T option
74 type simple_const_syntax
75 type complex_const_syntax
77 type activated_complex_const_syntax
78 datatype activated_const_syntax = Plain_const_syntax of int * string
79 | Complex_const_syntax of activated_complex_const_syntax
80 val requires_args: const_syntax -> int
81 val parse_const_syntax: Token.T list -> const_syntax option * Token.T list
82 val parse_tyco_syntax: Token.T list -> tyco_syntax option * Token.T list
83 val plain_const_syntax: string -> const_syntax
84 val simple_const_syntax: simple_const_syntax -> const_syntax
85 val complex_const_syntax: complex_const_syntax -> const_syntax
86 val activate_const_syntax: theory -> literals
87 -> string -> const_syntax -> Code_Thingol.naming -> activated_const_syntax * Code_Thingol.naming
88 val gen_print_app: (thm option -> var_ctxt -> const * iterm list -> Pretty.T list)
89 -> (thm option -> var_ctxt -> fixity -> iterm -> Pretty.T)
90 -> (string -> activated_const_syntax option)
91 -> thm option -> var_ctxt -> fixity -> const * iterm list -> Pretty.T
92 val gen_print_bind: (thm option -> var_ctxt -> fixity -> iterm -> Pretty.T)
93 -> thm option -> fixity
94 -> iterm -> var_ctxt -> Pretty.T * var_ctxt
97 structure Code_Printer : CODE_PRINTER =
102 (** generic nonsense *)
104 fun eqn_error (SOME thm) s = error (s ^ ",\nin equation " ^ Display.string_of_thm_without_context thm)
105 | eqn_error NONE s = error s;
107 val code_presentationN = "code_presentation";
108 val stmt_nameN = "stmt_name";
109 val _ = Markup.add_mode code_presentationN YXML.output_markup;
112 (** assembling and printing text pieces **)
117 fun xs @| y = xs @ [y];
118 val str = Print_Mode.setmp [] Pretty.str;
119 val concat = Pretty.block o Pretty.breaks;
120 val commas = Print_Mode.setmp [] Pretty.commas;
121 fun enclose l r = Print_Mode.setmp [] (Pretty.enclose l r);
122 val brackets = enclose "(" ")" o Pretty.breaks;
123 fun enum sep l r = Print_Mode.setmp [] (Pretty.enum sep l r);
124 fun enum_default default sep l r [] = str default
125 | enum_default default sep l r xs = enum sep l r xs;
126 fun semicolon ps = Pretty.block [concat ps, str ";"];
127 fun doublesemicolon ps = Pretty.block [concat ps, str ";;"];
128 fun indent i = Print_Mode.setmp [] (Pretty.indent i);
130 fun markup_stmt name = Print_Mode.setmp [code_presentationN]
131 (Pretty.mark (code_presentationN, [(stmt_nameN, name)]));
133 fun filter_presentation [] tree =
135 |> fold XML.add_content tree
136 | filter_presentation presentation_names tree =
138 fun is_selected (name, attrs) =
139 name = code_presentationN
140 andalso member (op =) presentation_names (the (Properties.get attrs stmt_nameN));
141 fun add_content_with_space tree (is_first, buf) =
143 |> not is_first ? Buffer.add "\n\n"
144 |> XML.add_content tree
146 fun filter (XML.Elem (name_attrs, xs)) =
147 fold (if is_selected name_attrs then add_content_with_space else filter) xs
148 | filter (XML.Text s) = I;
149 in snd (fold filter tree (true, Buffer.empty)) end;
151 fun format presentation_names width =
152 Print_Mode.setmp [code_presentationN] (Pretty.string_of_margin width)
154 #> filter_presentation presentation_names
159 (** names and variable name contexts **)
161 type var_ctxt = string Symtab.table * Name.context;
163 fun make_vars names = (fold (fn name => Symtab.update_new (name, name)) names Symtab.empty,
164 Name.make_context names);
166 fun intro_vars names (namemap, namectxt) =
168 val (names', namectxt') = Name.variants names namectxt;
169 val namemap' = fold2 (curry Symtab.update) names names' namemap;
170 in (namemap', namectxt') end;
172 fun lookup_var (namemap, _) name = case Symtab.lookup namemap name
173 of SOME name' => name'
174 | NONE => error ("Invalid name in context: " ^ quote name);
176 val first_upper = implode o nth_map 0 Symbol.to_ascii_upper o raw_explode;
177 val first_lower = implode o nth_map 0 Symbol.to_ascii_lower o raw_explode;
179 fun aux_params vars lhss =
181 fun fish_param _ (w as SOME _) = w
182 | fish_param (IVar (SOME v)) NONE = SOME v
183 | fish_param _ NONE = NONE;
184 fun fillup_param _ (_, SOME v) = v
185 | fillup_param x (i, NONE) = x ^ string_of_int i;
186 val fished1 = fold (map2 fish_param) lhss (replicate (length (hd lhss)) NONE);
187 val x = singleton (Name.variant_list (map_filter I fished1)) "x";
188 val fished2 = map_index (fillup_param x) fished1;
189 val (fished3, _) = Name.variants fished2 Name.context;
190 val vars' = intro_vars fished3 vars;
191 in map (lookup_var vars') fished3 end;
193 fun intro_base_names no_syntax deresolve names = names
194 |> map_filter (fn name => if no_syntax name then
195 let val name' = deresolve name in
196 if Long_Name.is_qualified name' then NONE else SOME name'
201 (** pretty literals **)
203 datatype literals = Literals of {
204 literal_char: string -> string,
205 literal_string: string -> string,
206 literal_numeral: int -> string,
207 literal_positive_numeral: int -> string,
208 literal_alternative_numeral: int -> string,
209 literal_naive_numeral: int -> string,
210 literal_list: Pretty.T list -> Pretty.T,
211 infix_cons: int * string
214 fun dest_Literals (Literals lits) = lits;
216 val literal_char = #literal_char o dest_Literals;
217 val literal_string = #literal_string o dest_Literals;
218 val literal_numeral = #literal_numeral o dest_Literals;
219 val literal_positive_numeral = #literal_positive_numeral o dest_Literals;
220 val literal_alternative_numeral = #literal_alternative_numeral o dest_Literals;
221 val literal_naive_numeral = #literal_naive_numeral o dest_Literals;
222 val literal_list = #literal_list o dest_Literals;
223 val infix_cons = #infix_cons o dest_Literals;
226 (** syntax printer **)
228 (* binding priorities *)
230 datatype lrx = L | R | X;
235 | INFX of (int * lrx);
237 val APP = INFX (~1, L);
239 fun fixity_lrx L L = false
240 | fixity_lrx R R = false
241 | fixity_lrx _ _ = true;
243 fun fixity NOBR _ = false
244 | fixity _ NOBR = false
245 | fixity (INFX (pr, lr)) (INFX (print_ctxt, lr_ctxt)) =
247 orelse pr = print_ctxt
248 andalso fixity_lrx lr lr_ctxt
249 orelse print_ctxt = ~1
250 | fixity BR (INFX _) = false
253 fun gen_brackify _ [p] = p
254 | gen_brackify true (ps as _::_) = enclose "(" ")" ps
255 | gen_brackify false (ps as _::_) = Pretty.block ps;
257 fun brackify fxy_ctxt =
258 gen_brackify (fixity BR fxy_ctxt) o Pretty.breaks;
260 fun brackify_infix infx fxy_ctxt (l, m, r) =
261 (if fixity (INFX infx) fxy_ctxt then enclose "(" ")" else Pretty.block)
262 ([l, str " ", m, Pretty.brk 1, r]);
264 fun brackify_block fxy_ctxt p1 ps p2 =
265 let val p = Pretty.block_enclose (p1, p2) ps
266 in if fixity BR fxy_ctxt
267 then enclose "(" ")" [p]
271 fun applify opn cls f fxy_ctxt p [] = p
272 | applify opn cls f fxy_ctxt p ps =
273 (if (fixity BR fxy_ctxt) then enclose "(" ")" else Pretty.block)
274 (p @@ enum "," opn cls (map f ps));
276 fun tuplify _ _ [] = NONE
277 | tuplify print fxy [x] = SOME (print fxy x)
278 | tuplify print _ xs = SOME (enum "," "(" ")" (map (print NOBR) xs));
283 type tyco_syntax = int * ((fixity -> itype -> Pretty.T)
284 -> fixity -> itype list -> Pretty.T);
286 type simple_const_syntax = int * ((fixity -> iterm -> Pretty.T)
287 -> fixity -> (iterm * itype) list -> Pretty.T);
289 type complex_const_syntax = int * (string list * (literals -> string list
290 -> (var_ctxt -> fixity -> iterm -> Pretty.T)
291 -> thm option -> var_ctxt -> fixity -> (iterm * itype) list -> Pretty.T));
293 datatype const_syntax = plain_const_syntax of string
294 | complex_const_syntax of complex_const_syntax;
296 fun requires_args (plain_const_syntax _) = 0
297 | requires_args (complex_const_syntax (k, _)) = k;
299 fun simple_const_syntax syn =
300 complex_const_syntax (apsnd (fn f => ([], (fn _ => fn _ => fn print => fn _ => fn vars => f (print vars)))) syn);
302 type activated_complex_const_syntax = int * ((var_ctxt -> fixity -> iterm -> Pretty.T)
303 -> thm option -> var_ctxt -> fixity -> (iterm * itype) list -> Pretty.T)
305 datatype activated_const_syntax = Plain_const_syntax of int * string
306 | Complex_const_syntax of activated_complex_const_syntax;
308 fun activate_const_syntax thy literals c (plain_const_syntax s) naming =
309 (Plain_const_syntax (Code.args_number thy c, s), naming)
310 | activate_const_syntax thy literals c (complex_const_syntax (n, (cs, f))) naming =
311 fold_map (Code_Thingol.ensure_declared_const thy) cs naming
312 |-> (fn cs' => pair (Complex_const_syntax (n, f literals cs')));
314 fun gen_print_app print_app_expr print_term const_syntax some_thm vars fxy (app as ((c, (_, function_typs)), ts)) =
316 of NONE => brackify fxy (print_app_expr some_thm vars app)
317 | SOME (Plain_const_syntax (_, s)) => brackify fxy (str s :: map (print_term some_thm vars BR) ts)
318 | SOME (Complex_const_syntax (k, print)) =>
320 fun print' fxy ts = print (print_term some_thm) some_thm vars fxy (ts ~~ take k function_typs);
323 else if k < length ts
324 then case chop k ts of (ts1, ts2) =>
325 brackify fxy (print' APP ts1 :: map (print_term some_thm vars BR) ts2)
326 else print_term some_thm vars fxy (Code_Thingol.eta_expand k app)
329 fun gen_print_bind print_term thm (fxy : fixity) pat vars =
331 val vs = Code_Thingol.fold_varnames (insert (op =)) pat [];
332 val vars' = intro_vars vs vars;
333 in (print_term thm vars' fxy pat, vars') end;
343 fun mk_mixfix prep_arg (fixity_this, mfx) =
345 fun is_arg (Arg _) = true
347 val i = (length o filter is_arg) mfx;
350 | fillin print (Arg fxy :: mfx) (a :: args) =
351 (print fxy o prep_arg) a :: fillin print mfx args
352 | fillin print (String s :: mfx) args =
353 str s :: fillin print mfx args
354 | fillin print (Break :: mfx) args =
355 Pretty.brk 1 :: fillin print mfx args;
357 (i, fn print => fn fixity_ctxt => fn args =>
358 gen_brackify (fixity fixity_this fixity_ctxt) (fillin print mfx args))
361 fun parse_infix prep_arg (x, i) s =
363 val l = case x of L => INFX (i, L) | _ => INFX (i, X);
364 val r = case x of R => INFX (i, R) | _ => INFX (i, X);
366 mk_mixfix prep_arg (INFX (i, x), [Arg l, String " ", String s, Break, Arg r])
369 fun parse_mixfix mk_plain mk_complex prep_arg s =
371 val sym_any = Scan.one Symbol.is_regular;
372 val parse = Scan.optional ($$ "!" >> K true) false -- Scan.repeat (
373 ($$ "(" -- $$ "_" -- $$ ")" >> K (Arg NOBR))
374 || ($$ "_" >> K (Arg BR))
375 || ($$ "/" |-- Scan.repeat ($$ " ") >> (K Break))
378 || Scan.unless ($$ "_" || $$ "/" || $$ "(" |-- $$ "_" |-- $$ ")")
379 sym_any) >> (String o implode)));
380 in case Scan.finite Symbol.stopper parse (Symbol.explode s)
381 of ((false, [String s]), []) => mk_plain s
382 | ((_, p as [_]), []) => mk_complex (mk_mixfix prep_arg (NOBR, p))
383 | ((b, p as _ :: _ :: _), []) => mk_complex (mk_mixfix prep_arg (if b then NOBR else BR, p))
385 (the_default ("malformed mixfix annotation: " ^ quote s) o snd) Scan.fail ()
388 val (infixK, infixlK, infixrK) = ("infix", "infixl", "infixr");
390 fun parse_syntax mk_plain mk_complex prep_arg =
392 ((Parse.$$$ infixK >> K X)
393 || (Parse.$$$ infixlK >> K L)
394 || (Parse.$$$ infixrK >> K R))
395 -- Parse.nat -- Parse.string
396 >> (fn ((x, i), s) => mk_complex (parse_infix prep_arg (x, i) s))
397 || Parse.string >> (fn s => (parse_mixfix mk_plain mk_complex prep_arg s)));
399 val _ = List.app Keyword.keyword [infixK, infixlK, infixrK];
401 fun parse_tyco_syntax x = parse_syntax (fn s => (0, (K o K o K o str) s)) I I x;
403 val parse_const_syntax = parse_syntax plain_const_syntax simple_const_syntax fst;