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(* Title: Tools/Code/code_printer.ML
Author: Florian Haftmann, TU Muenchen
Generic operations for pretty printing of target language code.
*)
signature CODE_PRINTER =
sig
type itype = Code_Thingol.itype
type iterm = Code_Thingol.iterm
type const = Code_Thingol.const
type dict = Code_Thingol.dict
val eqn_error: theory -> thm option -> string -> 'a
val @@ : 'a * 'a -> 'a list
val @| : 'a list * 'a -> 'a list
val str: string -> Pretty.T
val concat: Pretty.T list -> Pretty.T
val brackets: Pretty.T list -> Pretty.T
val enclose: string -> string -> Pretty.T list -> Pretty.T
val commas: Pretty.T list -> Pretty.T list
val enum: string -> string -> string -> Pretty.T list -> Pretty.T
val enum_default: string -> string -> string -> string -> Pretty.T list -> Pretty.T
val semicolon: Pretty.T list -> Pretty.T
val doublesemicolon: Pretty.T list -> Pretty.T
val indent: int -> Pretty.T -> Pretty.T
val markup_stmt: Code_Symbol.T -> Pretty.T -> Pretty.T
val format: Code_Symbol.T list -> int -> Pretty.T -> string
type var_ctxt
val make_vars: string list -> var_ctxt
val intro_vars: string list -> var_ctxt -> var_ctxt
val lookup_var: var_ctxt -> string -> string
val intro_base_names: (string -> bool) -> (string -> string)
-> string list -> var_ctxt -> var_ctxt
val intro_base_names_for: (string -> bool) -> (Code_Symbol.T -> string)
-> iterm list -> var_ctxt -> var_ctxt
val aux_params: var_ctxt -> iterm list list -> string list
type literals
val Literals: { literal_string: string -> string,
literal_numeral: int -> string,
literal_list: Pretty.T list -> Pretty.T, infix_cons: int * string }
-> literals
val literal_string: literals -> string -> string
val literal_numeral: literals -> int -> string
val literal_list: literals -> Pretty.T list -> Pretty.T
val infix_cons: literals -> int * string
type lrx
val L: lrx
val R: lrx
val X: lrx
type fixity
val BR: fixity
val NOBR: fixity
val INFX: int * lrx -> fixity
val APP: fixity
val brackify: fixity -> Pretty.T list -> Pretty.T
val brackify_infix: int * lrx -> fixity -> Pretty.T * Pretty.T * Pretty.T -> Pretty.T
val brackify_block: fixity -> Pretty.T -> Pretty.T list -> Pretty.T -> Pretty.T
val gen_applify: bool -> string -> string -> ('a -> Pretty.T) -> fixity -> Pretty.T -> 'a list -> Pretty.T
val applify: string -> string -> ('a -> Pretty.T) -> fixity -> Pretty.T -> 'a list -> Pretty.T
val tuplify: (fixity -> 'a -> Pretty.T) -> fixity -> 'a list -> Pretty.T option
type raw_const_syntax
val plain_const_syntax: string -> raw_const_syntax
type simple_const_syntax
val simple_const_syntax: simple_const_syntax -> raw_const_syntax
type complex_const_syntax
val complex_const_syntax: complex_const_syntax -> raw_const_syntax
val parse_const_syntax: raw_const_syntax parser
val requires_args: raw_const_syntax -> int
datatype const_printer = Plain_printer of string
| Complex_printer of (var_ctxt -> fixity -> iterm -> Pretty.T)
-> thm option -> var_ctxt -> fixity -> (iterm * itype) list -> Pretty.T
type const_syntax = int * const_printer
val prep_const_syntax: theory -> literals
-> string -> raw_const_syntax -> const_syntax
type tyco_syntax
val parse_tyco_syntax: tyco_syntax parser
val gen_print_app: (thm option -> var_ctxt -> const * iterm list -> Pretty.T list)
-> (thm option -> var_ctxt -> fixity -> iterm -> Pretty.T)
-> (string -> const_syntax option)
-> thm option -> var_ctxt -> fixity -> const * iterm list -> Pretty.T
val gen_print_bind: (thm option -> var_ctxt -> fixity -> iterm -> Pretty.T)
-> thm option -> fixity
-> iterm -> var_ctxt -> Pretty.T * var_ctxt
type identifiers
type printings
type data
val empty_data: data
val map_data: (string list * identifiers * printings
-> string list * identifiers * printings)
-> data -> data
val merge_data: data * data -> data
val the_reserved: data -> string list;
val the_identifiers: data -> identifiers;
val the_printings: data -> printings;
end;
structure Code_Printer : CODE_PRINTER =
struct
open Basic_Code_Symbol;
open Code_Thingol;
(** generic nonsense *)
fun eqn_error thy (SOME thm) s =
error (s ^ ",\nin equation " ^ Thm.string_of_thm_global thy thm)
| eqn_error _ NONE s = error s;
val code_presentationN = "code_presentation";
val stmt_nameN = "stmt_name";
val _ = Markup.add_mode code_presentationN YXML.output_markup;
(** assembling and printing text pieces **)
infixr 5 @@;
infixr 5 @|;
fun x @@ y = [x, y];
fun xs @| y = xs @ [y];
fun with_no_print_mode f = Print_Mode.setmp [] f;
val str = with_no_print_mode Pretty.str;
val concat = Pretty.block o Pretty.breaks;
val commas = with_no_print_mode Pretty.commas;
fun enclose l r = with_no_print_mode (Pretty.enclose l r);
val brackets = enclose "(" ")" o Pretty.breaks;
fun enum sep l r = with_no_print_mode (Pretty.enum sep l r);
fun enum_default default sep l r [] = str default
| enum_default default sep l r xs = enum sep l r xs;
fun semicolon ps = Pretty.block [concat ps, str ";"];
fun doublesemicolon ps = Pretty.block [concat ps, str ";;"];
fun indent i = with_no_print_mode (Pretty.indent i);
fun with_presentation_marker f = Print_Mode.setmp [code_presentationN] f;
fun markup_stmt sym = with_presentation_marker
(Pretty.mark (code_presentationN, [(stmt_nameN, Code_Symbol.marker sym)]));
fun filter_presentation [] tree =
Buffer.empty
|> fold XML.add_content tree
| filter_presentation presentation_syms tree =
let
val presentation_idents = map Code_Symbol.marker presentation_syms
fun is_selected (name, attrs) =
name = code_presentationN
andalso member (op =) presentation_idents (the (Properties.get attrs stmt_nameN));
fun add_content_with_space tree (is_first, buf) =
buf
|> not is_first ? Buffer.add "\n\n"
|> XML.add_content tree
|> pair false;
fun filter (XML.Elem (name_attrs, xs)) =
fold (if is_selected name_attrs then add_content_with_space else filter) xs
| filter (XML.Text _) = I;
in snd (fold filter tree (true, Buffer.empty)) end;
fun format presentation_names width =
with_presentation_marker (Pretty.string_of_margin width)
#> YXML.parse_body
#> filter_presentation presentation_names
#> Buffer.add "\n"
#> Buffer.content;
(** names and variable name contexts **)
type var_ctxt = string Symtab.table * Name.context;
fun make_vars names = (fold (fn name => Symtab.update_new (name, name)) names Symtab.empty,
Name.make_context names);
fun intro_vars names (namemap, namectxt) =
let
val (names', namectxt') = fold_map Name.variant names namectxt;
val namemap' = fold2 (curry Symtab.update) names names' namemap;
in (namemap', namectxt') end;
fun lookup_var (namemap, _) name =
case Symtab.lookup namemap name of
SOME name' => name'
| NONE => error ("Invalid name in context: " ^ quote name);
fun aux_params vars lhss =
let
fun fish_param _ (w as SOME _) = w
| fish_param (IVar (SOME v)) NONE = SOME v
| fish_param _ NONE = NONE;
fun fillup_param _ (_, SOME v) = v
| fillup_param x (i, NONE) = x ^ string_of_int i;
val fished1 = fold (map2 fish_param) lhss (replicate (length (hd lhss)) NONE);
val x = singleton (Name.variant_list (map_filter I fished1)) "x";
val fished2 = map_index (fillup_param x) fished1;
val (fished3, _) = fold_map Name.variant fished2 Name.context;
val vars' = intro_vars fished3 vars;
in map (lookup_var vars') fished3 end;
fun intro_base_names no_syntax deresolve =
map_filter (fn name => if no_syntax name then
let val name' = deresolve name in
if Long_Name.is_qualified name' then NONE else SOME name'
end else NONE)
#> intro_vars;
fun intro_base_names_for no_syntax deresolve ts =
[]
|> fold Code_Thingol.add_constsyms ts
|> intro_base_names (fn Constant const => no_syntax const | _ => true) deresolve;
(** pretty literals **)
datatype literals = Literals of {
literal_string: string -> string,
literal_numeral: int -> string,
literal_list: Pretty.T list -> Pretty.T,
infix_cons: int * string
};
fun dest_Literals (Literals lits) = lits;
val literal_string = #literal_string o dest_Literals;
val literal_numeral = #literal_numeral o dest_Literals;
val literal_list = #literal_list o dest_Literals;
val infix_cons = #infix_cons o dest_Literals;
(** syntax printer **)
(* binding priorities *)
datatype lrx = L | R | X;
datatype fixity =
BR
| NOBR
| INFX of (int * lrx);
val APP = INFX (~1, L);
fun fixity_lrx L L = false
| fixity_lrx R R = false
| fixity_lrx _ _ = true;
fun fixity NOBR _ = false
| fixity _ NOBR = false
| fixity (INFX (pr, lr)) (INFX (pr_ctxt, lr_ctxt)) =
pr < pr_ctxt
orelse pr = pr_ctxt
andalso fixity_lrx lr lr_ctxt
orelse pr_ctxt = ~1
| fixity BR (INFX _) = false
| fixity _ _ = true;
fun gen_brackify _ [p] = p
| gen_brackify true (ps as _::_) = enclose "(" ")" ps
| gen_brackify false (ps as _::_) = Pretty.block ps;
fun brackify fxy_ctxt =
gen_brackify (fixity BR fxy_ctxt) o Pretty.breaks;
fun brackify_infix infx fxy_ctxt (l, m, r) =
gen_brackify (fixity (INFX infx) fxy_ctxt) [l, str " ", m, Pretty.brk 1, r];
fun brackify_block fxy_ctxt p1 ps p2 =
let val p = Pretty.block_enclose (p1, p2) ps
in if fixity BR fxy_ctxt
then enclose "(" ")" [p]
else p
end;
fun gen_applify strict opn cls f fxy_ctxt p [] =
if strict
then gen_brackify (fixity BR fxy_ctxt) [p, str (opn ^ cls)]
else p
| gen_applify strict opn cls f fxy_ctxt p ps =
gen_brackify (fixity BR fxy_ctxt) (p @@ enum "," opn cls (map f ps));
fun applify opn = gen_applify false opn;
fun tuplify _ _ [] = NONE
| tuplify print fxy [x] = SOME (print fxy x)
| tuplify print _ xs = SOME (enum "," "(" ")" (map (print NOBR) xs));
(* generic syntax *)
type simple_const_syntax = int * ((fixity -> iterm -> Pretty.T)
-> fixity -> (iterm * itype) list -> Pretty.T);
type complex_const_syntax = int * (literals
-> (var_ctxt -> fixity -> iterm -> Pretty.T)
-> thm option -> var_ctxt -> fixity -> (iterm * itype) list -> Pretty.T);
datatype raw_const_syntax = plain_const_syntax of string
| complex_const_syntax of complex_const_syntax;
fun simple_const_syntax syn =
complex_const_syntax
(apsnd (fn f => fn _ => fn print => fn _ => fn vars => f (print vars)) syn);
fun requires_args (plain_const_syntax _) = 0
| requires_args (complex_const_syntax (k, _)) = k;
datatype const_printer = Plain_printer of string
| Complex_printer of (var_ctxt -> fixity -> iterm -> Pretty.T)
-> thm option -> var_ctxt -> fixity -> (iterm * itype) list -> Pretty.T;
type const_syntax = int * const_printer;
fun prep_const_syntax thy literals c (plain_const_syntax s) =
(Code.args_number thy c, Plain_printer s)
| prep_const_syntax thy literals c (complex_const_syntax (n, f))=
(n, Complex_printer (f literals));
fun gen_print_app print_app_expr print_term const_syntax some_thm vars fxy
(app as ({ sym, dom, ... }, ts)) =
case sym of
Constant const => (case const_syntax const of
NONE => brackify fxy (print_app_expr some_thm vars app)
| SOME (_, Plain_printer s) =>
brackify fxy (str s :: map (print_term some_thm vars BR) ts)
| SOME (k, Complex_printer print) =>
let
fun print' fxy ts =
print (print_term some_thm) some_thm vars fxy (ts ~~ take k dom);
in
if k = length ts
then print' fxy ts
else if k < length ts
then case chop k ts of (ts1, ts2) =>
brackify fxy (print' APP ts1 :: map (print_term some_thm vars BR) ts2)
else print_term some_thm vars fxy (Code_Thingol.eta_expand k app)
end)
| _ => brackify fxy (print_app_expr some_thm vars app);
fun gen_print_bind print_term thm (fxy : fixity) pat vars =
let
val vs = Code_Thingol.fold_varnames (insert (op =)) pat [];
val vars' = intro_vars vs vars;
in (print_term thm vars' fxy pat, vars') end;
type tyco_syntax = int * ((fixity -> itype -> Pretty.T)
-> fixity -> itype list -> Pretty.T);
(* mixfix syntax *)
datatype 'a mixfix =
Arg of fixity
| String of string
| Break;
fun printer_of_mixfix prep_arg (fixity_this, mfx) =
let
fun is_arg (Arg _) = true
| is_arg _ = false;
val i = (length o filter is_arg) mfx;
fun fillin _ [] [] =
[]
| fillin print (Arg fxy :: mfx) (a :: args) =
(print fxy o prep_arg) a :: fillin print mfx args
| fillin print (String s :: mfx) args =
str s :: fillin print mfx args
| fillin print (Break :: mfx) args =
Pretty.brk 1 :: fillin print mfx args;
in
(i, fn print => fn fixity_ctxt => fn args =>
gen_brackify (fixity fixity_this fixity_ctxt) (fillin print mfx args))
end;
fun read_infix (fixity_this, i) s =
let
val l = case fixity_this of L => INFX (i, L) | _ => INFX (i, X);
val r = case fixity_this of R => INFX (i, R) | _ => INFX (i, X);
in
(INFX (i, fixity_this), [Arg l, String " ", String s, Break, Arg r])
end;
fun read_mixfix s =
let
val sym_any = Scan.one Symbol.not_eof;
val parse = Scan.optional ($$ "!" >> K NOBR) BR -- Scan.repeat (
($$ "(" -- $$ "_" -- $$ ")" >> K (Arg NOBR))
|| ($$ "_" >> K (Arg BR))
|| ($$ "/" |-- Scan.repeat ($$ " ") >> (K Break))
|| (Scan.repeat1
( $$ "'" |-- sym_any
|| Scan.unless ($$ "_" || $$ "/" || $$ "(" |-- $$ "_" |-- $$ ")")
sym_any) >> (String o implode)));
fun err s (_, NONE) = (fn () => "malformed mixfix annotation: " ^ quote s)
| err _ (_, SOME msg) = msg;
in
case Scan.finite Symbol.stopper parse (Symbol.explode s) of
(fixity_mixfix, []) => fixity_mixfix
| _ => Scan.!! (err s) Scan.fail ()
end;
val parse_fixity =
(\<^keyword>\<open>infix\<close> >> K X) || (\<^keyword>\<open>infixl\<close> >> K L) || (\<^keyword>\<open>infixr\<close> >> K R)
fun parse_mixfix x =
(Parse.string >> read_mixfix
|| parse_fixity -- Parse.nat -- Parse.string
>> (fn ((fixity, i), s) => read_infix (fixity, i) s)) x;
fun syntax_of_mixfix of_plain of_printer prep_arg (BR, [String s]) = of_plain s
| syntax_of_mixfix of_plain of_printer prep_arg (fixity, mfx) =
of_printer (printer_of_mixfix prep_arg (fixity, mfx));
fun parse_tyco_syntax x =
(parse_mixfix >> syntax_of_mixfix (fn s => (0, (K o K o K o str) s)) I I) x;
val parse_const_syntax =
parse_mixfix >> syntax_of_mixfix plain_const_syntax simple_const_syntax fst;
(** custom data structure **)
type identifiers = (string list * string, string list * string, string list * string, string list * string,
string list * string, string list * string) Code_Symbol.data;
type printings = (const_syntax, tyco_syntax, string, unit, unit,
(Pretty.T * Code_Symbol.T list)) Code_Symbol.data;
datatype data = Data of { reserved: string list, identifiers: identifiers,
printings: printings };
fun make_data (reserved, identifiers, printings) =
Data { reserved = reserved, identifiers = identifiers, printings = printings };
val empty_data = make_data ([], Code_Symbol.empty_data, Code_Symbol.empty_data);
fun map_data f (Data { reserved, identifiers, printings }) =
make_data (f (reserved, identifiers, printings));
fun merge_data (Data { reserved = reserved1, identifiers = identifiers1, printings = printings1 },
Data { reserved = reserved2, identifiers = identifiers2, printings = printings2 }) =
make_data (merge (op =) (reserved1, reserved2),
Code_Symbol.merge_data (identifiers1, identifiers2), Code_Symbol.merge_data (printings1, printings2));
fun the_reserved (Data { reserved, ... }) = reserved;
fun the_identifiers (Data { identifiers , ... }) = identifiers;
fun the_printings (Data { printings, ... }) = printings;
end; (*struct*)
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