(* Title: Pure/Isar/parse.ML
Author: Markus Wenzel, TU Muenchen
Generic parsers for Isabelle/Isar outer syntax.
*)
signature PARSE =
sig
val group: (unit -> string) -> (Token.T list -> 'a) -> Token.T list -> 'a
val !!! : (Token.T list -> 'a) -> Token.T list -> 'a
val !!!! : (Token.T list -> 'a) -> Token.T list -> 'a
val not_eof: Token.T parser
val token: 'a parser -> Token.T parser
val range: 'a parser -> ('a * Position.range) parser
val position: 'a parser -> ('a * Position.T) parser
val input: 'a parser -> Input.source parser
val inner_syntax: 'a parser -> string parser
val command: string parser
val keyword: string parser
val short_ident: string parser
val long_ident: string parser
val sym_ident: string parser
val dots: string parser
val minus: string parser
val term_var: string parser
val type_ident: string parser
val type_var: string parser
val number: string parser
val float_number: string parser
val string: string parser
val string_position: (string * Position.T) parser
val alt_string: string parser
val verbatim: string parser
val cartouche: string parser
val control: Antiquote.control parser
val eof: string parser
val command_name: string -> string parser
val keyword_with: (string -> bool) -> string parser
val keyword_markup: bool * Markup.T -> string -> string parser
val keyword_improper: string -> string parser
val $$$ : string -> string parser
val reserved: string -> string parser
val underscore: string parser
val maybe: 'a parser -> 'a option parser
val maybe_position: ('a * Position.T) parser -> ('a option * Position.T) parser
val opt_keyword: string -> bool parser
val opt_bang: bool parser
val begin: string parser
val opt_begin: bool parser
val nat: int parser
val int: int parser
val real: real parser
val enum_positions: string -> 'a parser -> ('a list * Position.T list) parser
val enum1_positions: string -> 'a parser -> ('a list * Position.T list) parser
val enum: string -> 'a parser -> 'a list parser
val enum1: string -> 'a parser -> 'a list parser
val and_list: 'a parser -> 'a list parser
val and_list1: 'a parser -> 'a list parser
val enum': string -> 'a context_parser -> 'a list context_parser
val enum1': string -> 'a context_parser -> 'a list context_parser
val and_list': 'a context_parser -> 'a list context_parser
val and_list1': 'a context_parser -> 'a list context_parser
val list: 'a parser -> 'a list parser
val list1: 'a parser -> 'a list parser
val name: string parser
val name_range: (string * Position.range) parser
val name_position: (string * Position.T) parser
val binding: binding parser
val embedded: string parser
val embedded_inner_syntax: string parser
val embedded_input: Input.source parser
val embedded_position: (string * Position.T) parser
val text: string parser
val path_input: Input.source parser
val path: string parser
val path_binding: (string * Position.T) parser
val session_name: (string * Position.T) parser
val theory_name: (string * Position.T) parser
val liberal_name: string parser
val parname: string parser
val parbinding: binding parser
val class: string parser
val sort: string parser
val type_const: string parser
val arity: (string * string list * string) parser
val multi_arity: (string list * string list * string) parser
val type_args: string list parser
val type_args_constrained: (string * string option) list parser
val typ: string parser
val mixfix: mixfix parser
val mixfix': mixfix parser
val opt_mixfix: mixfix parser
val opt_mixfix': mixfix parser
val syntax_mode: Syntax.mode parser
val where_: string parser
val const_decl: (string * string * mixfix) parser
val const_binding: (binding * string * mixfix) parser
val params: (binding * string option * mixfix) list parser
val vars: (binding * string option * mixfix) list parser
val for_fixes: (binding * string option * mixfix) list parser
val ML_source: Input.source parser
val document_source: Input.source parser
val document_marker: Input.source parser
val const: string parser
val term: string parser
val prop: string parser
val literal_fact: string parser
val propp: (string * string list) parser
val termp: (string * string list) parser
val private: Position.T parser
val qualified: Position.T parser
val target: (string * Position.T) parser
val opt_target: (string * Position.T) option parser
val args: Token.T list parser
val args1: (string -> bool) -> Token.T list parser
val attribs: Token.src list parser
val opt_attribs: Token.src list parser
val thm_sel: Facts.interval list parser
val thm: (Facts.ref * Token.src list) parser
val thms1: (Facts.ref * Token.src list) list parser
val options: ((string * Position.T) * (string * Position.T)) list parser
val embedded_ml: ML_Lex.token Antiquote.antiquote list parser
val embedded_ml_underscore: ML_Lex.token Antiquote.antiquote list parser
val read_antiq: Keyword.keywords -> 'a parser -> Symbol_Pos.T list * Position.T -> 'a
val read_embedded: Proof.context -> Keyword.keywords -> 'a parser -> Input.source -> 'a
val read_embedded_src: Proof.context -> Keyword.keywords -> 'a parser -> Token.src -> 'a
end;
structure Parse: PARSE =
struct
(** error handling **)
(* group atomic parsers (no cuts!) *)
fun group s scan = scan || Scan.fail_with
(fn [] => (fn () => s () ^ " expected,\nbut end-of-input was found")
| tok :: _ =>
(fn () =>
(case Token.text_of tok of
(txt, "") =>
s () ^ " expected,\nbut " ^ txt ^ Position.here (Token.pos_of tok) ^
" was found"
| (txt1, txt2) =>
s () ^ " expected,\nbut " ^ txt1 ^ Position.here (Token.pos_of tok) ^
" was found:\n" ^ txt2)));
(* cut *)
fun cut kind scan =
let
fun get_pos [] = " (end-of-input)"
| get_pos (tok :: _) = Position.here (Token.pos_of tok);
fun err (toks, NONE) = (fn () => kind ^ get_pos toks)
| err (toks, SOME msg) =
(fn () =>
let val s = msg () in
if String.isPrefix kind s then s
else kind ^ get_pos toks ^ ": " ^ s
end);
in Scan.!! err scan end;
fun !!! scan = cut "Outer syntax error" scan;
fun !!!! scan = cut "Corrupted outer syntax in presentation" scan;
(** basic parsers **)
(* tokens *)
fun RESET_VALUE atom = (*required for all primitive parsers*)
Scan.ahead (Scan.one (K true)) -- atom >> (fn (arg, x) => (Token.assign NONE arg; x));
val not_eof = RESET_VALUE (Scan.one Token.not_eof);
fun token atom = Scan.ahead not_eof --| atom;
fun range scan = (Scan.ahead not_eof >> (Token.range_of o single)) -- scan >> Library.swap;
fun position scan = (Scan.ahead not_eof >> Token.pos_of) -- scan >> Library.swap;
fun input atom = Scan.ahead atom |-- not_eof >> Token.input_of;
fun inner_syntax atom = Scan.ahead atom |-- not_eof >> Token.inner_syntax_of;
fun kind k =
group (fn () => Token.str_of_kind k)
(RESET_VALUE (Scan.one (Token.is_kind k) >> Token.content_of));
val command = kind Token.Command;
val keyword = kind Token.Keyword;
val short_ident = kind Token.Ident;
val long_ident = kind Token.Long_Ident;
val sym_ident = kind Token.Sym_Ident;
val term_var = kind Token.Var;
val type_ident = kind Token.Type_Ident;
val type_var = kind Token.Type_Var;
val number = kind Token.Nat;
val float_number = kind Token.Float;
val string = kind Token.String;
val alt_string = kind Token.Alt_String;
val verbatim = kind Token.Verbatim;
val cartouche = kind Token.Cartouche;
val control = token (kind Token.control_kind) >> (the o Token.get_control);
val eof = kind Token.EOF;
fun command_name x =
group (fn () => Token.str_of_kind Token.Command ^ " " ^ quote x)
(RESET_VALUE (Scan.one (fn tok => Token.is_command tok andalso Token.content_of tok = x)))
>> Token.content_of;
fun keyword_with pred = RESET_VALUE (Scan.one (Token.keyword_with pred) >> Token.content_of);
fun keyword_markup markup x =
group (fn () => Token.str_of_kind Token.Keyword ^ " " ^ quote x)
(Scan.ahead not_eof -- keyword_with (fn y => x = y))
>> (fn (tok, x) => (Token.assign (SOME (Token.Literal markup)) tok; x));
val keyword_improper = keyword_markup (true, Markup.improper);
val $$$ = keyword_markup (false, Markup.quasi_keyword);
fun reserved x =
group (fn () => "reserved identifier " ^ quote x)
(RESET_VALUE (Scan.one (Token.ident_with (fn y => x = y)) >> Token.content_of));
val dots = sym_ident :-- (fn "\<dots>" => Scan.succeed () | _ => Scan.fail) >> #1;
val minus = sym_ident :-- (fn "-" => Scan.succeed () | _ => Scan.fail) >> #1;
val underscore = sym_ident :-- (fn "_" => Scan.succeed () | _ => Scan.fail) >> #1;
fun maybe scan = underscore >> K NONE || scan >> SOME;
fun maybe_position scan = position (underscore >> K NONE) || scan >> apfst SOME;
val nat = number >> (#1 o Library.read_int o Symbol.explode);
val int = Scan.optional (minus >> K ~1) 1 -- nat >> op *;
val real = float_number >> Value.parse_real || int >> Real.fromInt;
fun opt_keyword s = Scan.optional ($$$ "(" |-- !!! (($$$ s >> K true) --| $$$ ")")) false;
val opt_bang = Scan.optional ($$$ "!" >> K true) false;
val begin = $$$ "begin";
val opt_begin = Scan.optional (begin >> K true) false;
(* enumerations *)
fun enum1_positions sep scan =
scan -- Scan.repeat (position ($$$ sep) -- !!! scan) >>
(fn (x, ys) => (x :: map #2 ys, map (#2 o #1) ys));
fun enum_positions sep scan =
enum1_positions sep scan || Scan.succeed ([], []);
fun enum1 sep scan = scan ::: Scan.repeat ($$$ sep |-- !!! scan);
fun enum sep scan = enum1 sep scan || Scan.succeed [];
fun enum1' sep scan = scan ::: Scan.repeat (Scan.lift ($$$ sep) |-- scan);
fun enum' sep scan = enum1' sep scan || Scan.succeed [];
fun and_list1 scan = enum1 "and" scan;
fun and_list scan = enum "and" scan;
fun and_list1' scan = enum1' "and" scan;
fun and_list' scan = enum' "and" scan;
fun list1 scan = enum1 "," scan;
fun list scan = enum "," scan;
(* names and embedded content *)
val name =
group (fn () => "name")
(short_ident || long_ident || sym_ident || number || string);
val name_range = input name >> Input.source_content_range;
val name_position = input name >> Input.source_content;
val string_position = input string >> Input.source_content;
val binding = name_position >> Binding.make;
val embedded =
group (fn () => "embedded content")
(cartouche || string || short_ident || long_ident || sym_ident ||
term_var || type_ident || type_var || number);
val embedded_inner_syntax = inner_syntax embedded;
val embedded_input = input embedded;
val embedded_position = embedded_input >> Input.source_content;
val text = group (fn () => "text") (embedded || verbatim);
val path_input = group (fn () => "file name/path specification") embedded_input;
val path = path_input >> Input.string_of;
val path_binding = group (fn () => "path binding (strict file name)") (position embedded);
val session_name = group (fn () => "session name") name_position;
val theory_name = group (fn () => "theory name") name_position;
val liberal_name = keyword_with Token.ident_or_symbolic || name;
val parname = Scan.optional ($$$ "(" |-- name --| $$$ ")") "";
val parbinding = Scan.optional ($$$ "(" |-- binding --| $$$ ")") Binding.empty;
(* type classes *)
val class = group (fn () => "type class") (inner_syntax embedded);
val sort = group (fn () => "sort") (inner_syntax embedded);
val type_const = group (fn () => "type constructor") (inner_syntax embedded);
val arity = type_const -- ($$$ "::" |-- !!!
(Scan.optional ($$$ "(" |-- !!! (list1 sort --| $$$ ")")) [] -- sort)) >> Scan.triple2;
val multi_arity = and_list1 type_const -- ($$$ "::" |-- !!!
(Scan.optional ($$$ "(" |-- !!! (list1 sort --| $$$ ")")) [] -- sort)) >> Scan.triple2;
(* types *)
val typ = group (fn () => "type") (inner_syntax embedded);
fun type_arguments arg =
arg >> single ||
$$$ "(" |-- !!! (list1 arg --| $$$ ")") ||
Scan.succeed [];
val type_args = type_arguments type_ident;
val type_args_constrained = type_arguments (type_ident -- Scan.option ($$$ "::" |-- !!! sort));
(* mixfix annotations *)
local
val mfix = input (string || cartouche);
val mixfix_ =
mfix -- !!! (Scan.optional ($$$ "[" |-- !!! (list nat --| $$$ "]")) [] -- Scan.optional nat 1000)
>> (fn (sy, (ps, p)) => fn range => Mixfix (sy, ps, p, range));
val structure_ = $$$ "structure" >> K Structure;
val binder_ =
$$$ "binder" |-- !!! (mfix -- ($$$ "[" |-- nat --| $$$ "]" -- nat || nat >> (fn n => (n, n))))
>> (fn (sy, (p, q)) => fn range => Binder (sy, p, q, range));
val infixl_ = $$$ "infixl" |-- !!! (mfix -- nat >> (fn (sy, p) => fn range => Infixl (sy, p, range)));
val infixr_ = $$$ "infixr" |-- !!! (mfix -- nat >> (fn (sy, p) => fn range => Infixr (sy, p, range)));
val infix_ = $$$ "infix" |-- !!! (mfix -- nat >> (fn (sy, p) => fn range => Infix (sy, p, range)));
val mixfix_body = mixfix_ || structure_ || binder_ || infixl_ || infixr_ || infix_;
fun annotation guard body =
Scan.trace ($$$ "(" |-- guard (body --| $$$ ")"))
>> (fn (mx, toks) => mx (Token.range_of toks));
fun opt_annotation guard body = Scan.optional (annotation guard body) NoSyn;
in
val mixfix = annotation !!! mixfix_body;
val mixfix' = annotation I mixfix_body;
val opt_mixfix = opt_annotation !!! mixfix_body;
val opt_mixfix' = opt_annotation I mixfix_body;
end;
(* syntax mode *)
val syntax_mode_spec =
($$$ "output" >> K ("", false)) || name -- Scan.optional ($$$ "output" >> K false) true;
val syntax_mode =
Scan.optional ($$$ "(" |-- !!! (syntax_mode_spec --| $$$ ")")) Syntax.mode_default;
(* fixes *)
val where_ = $$$ "where";
val const_decl = name -- ($$$ "::" |-- !!! typ) -- opt_mixfix >> Scan.triple1;
val const_binding = binding -- ($$$ "::" |-- !!! typ) -- opt_mixfix >> Scan.triple1;
val param_mixfix = binding -- Scan.option ($$$ "::" |-- typ) -- mixfix' >> (single o Scan.triple1);
val params =
(binding -- Scan.repeat binding) -- Scan.option ($$$ "::" |-- !!! (Scan.ahead typ -- embedded))
>> (fn ((x, ys), T) =>
(x, Option.map #1 T, NoSyn) :: map (fn y => (y, Option.map #2 T, NoSyn)) ys);
val vars = and_list1 (param_mixfix || params) >> flat;
val for_fixes = Scan.optional ($$$ "for" |-- !!! vars) [];
(* embedded source text *)
val ML_source = input (group (fn () => "ML source") text);
val document_source = input (group (fn () => "document source") text);
val document_marker =
group (fn () => "document marker")
(RESET_VALUE (Scan.one Token.is_document_marker >> Token.input_of));
(* terms *)
val const = group (fn () => "constant") (inner_syntax embedded);
val term = group (fn () => "term") (inner_syntax embedded);
val prop = group (fn () => "proposition") (inner_syntax embedded);
val literal_fact = inner_syntax (group (fn () => "literal fact") (alt_string || cartouche));
(* patterns *)
val is_terms = Scan.repeat1 ($$$ "is" |-- term);
val is_props = Scan.repeat1 ($$$ "is" |-- prop);
val propp = prop -- Scan.optional ($$$ "(" |-- !!! (is_props --| $$$ ")")) [];
val termp = term -- Scan.optional ($$$ "(" |-- !!! (is_terms --| $$$ ")")) [];
(* target information *)
val private = position ($$$ "private") >> #2;
val qualified = position ($$$ "qualified") >> #2;
val target = ($$$ "(" -- $$$ "in") |-- !!! (name_position --| $$$ ")");
val opt_target = Scan.option target;
(* arguments within outer syntax *)
local
val argument_kinds =
[Token.Ident, Token.Long_Ident, Token.Sym_Ident, Token.Var, Token.Type_Ident, Token.Type_Var,
Token.Nat, Token.Float, Token.String, Token.Alt_String, Token.Cartouche, Token.Verbatim];
fun arguments is_symid =
let
fun argument blk =
group (fn () => "argument")
(Scan.one (fn tok =>
let val kind = Token.kind_of tok in
member (op =) argument_kinds kind orelse
Token.keyword_with is_symid tok orelse
(blk andalso Token.keyword_with (fn s => s = ",") tok)
end));
fun args blk x = Scan.optional (args1 blk) [] x
and args1 blk x =
(Scan.repeats1 (Scan.repeat1 (argument blk) || argsp "(" ")" || argsp "[" "]")) x
and argsp l r x = (token ($$$ l) ::: !!! (args true @@@ (token ($$$ r) >> single))) x;
in (args, args1) end;
in
val args = #1 (arguments Token.ident_or_symbolic) false;
fun args1 is_symid = #2 (arguments is_symid) false;
end;
(* attributes *)
val attrib = token liberal_name ::: !!! args;
val attribs = $$$ "[" |-- list attrib --| $$$ "]";
val opt_attribs = Scan.optional attribs [];
(* theorem references *)
val thm_sel = $$$ "(" |-- list1
(nat --| minus -- nat >> Facts.FromTo ||
nat --| minus >> Facts.From ||
nat >> Facts.Single) --| $$$ ")";
val thm =
$$$ "[" |-- attribs --| $$$ "]" >> pair (Facts.named "") ||
(literal_fact >> Facts.Fact ||
name_position -- Scan.option thm_sel >> Facts.Named) -- opt_attribs;
val thms1 = Scan.repeat1 thm;
(* options *)
val option_name = group (fn () => "option name") name_position;
val option_value = group (fn () => "option value") ((token real || token name) >> Token.content_of);
val option =
option_name :-- (fn (_, pos) =>
Scan.optional ($$$ "=" |-- !!! (position option_value)) ("true", pos));
val options = $$$ "[" |-- list1 option --| $$$ "]";
(* embedded ML *)
val embedded_ml =
embedded_input >> ML_Lex.read_source ||
control >> (ML_Lex.read_symbols o Antiquote.control_symbols);
val embedded_ml_underscore =
input underscore >> ML_Lex.read_source || embedded_ml;
(* read embedded source, e.g. for antiquotations *)
fun tokenize keywords = Token.tokenize keywords {strict = true} #> filter Token.is_proper;
fun read_antiq keywords scan (syms, pos) =
(case Scan.read Token.stopper scan (tokenize (Keyword.no_command_keywords keywords) syms) of
SOME res => res
| NONE => error ("Malformed antiquotation" ^ Position.here pos));
fun read_embedded ctxt keywords parse input =
let
val toks = tokenize keywords (Input.source_explode input);
val _ = Context_Position.reports_text ctxt (maps (Token.reports keywords) toks);
in
(case Scan.read Token.stopper parse toks of
SOME res => res
| NONE => error ("Bad input" ^ Position.here (Input.pos_of input)))
end;
fun read_embedded_src ctxt keywords parse src =
Token.syntax (Scan.lift embedded_input) src ctxt
|> #1 |> read_embedded ctxt keywords parse;
end;