1 (* Title: Pure/Isar/args.ML
2 Author: Markus Wenzel, TU Muenchen
4 Parsing with implicit value assignment. Concrete argument syntax of
5 attributes, methods etc.
11 val src: (string * Token.T list) * Position.T -> src
12 val dest_src: src -> (string * Token.T list) * Position.T
13 val pretty_src: Proof.context -> src -> Pretty.T
14 val map_name: (string -> string) -> src -> src
15 val transform_values: morphism -> src -> src
16 val assignable: src -> src
17 val closure: src -> src
18 val context: Proof.context context_parser
19 val theory: theory context_parser
20 val $$$ : string -> string parser
21 val add: string parser
22 val del: string parser
23 val colon: string parser
24 val query: string parser
25 val bang: string parser
26 val query_colon: string parser
27 val bang_colon: string parser
28 val parens: ('a parser) -> 'a parser
29 val bracks: ('a parser) -> 'a parser
30 val mode: string -> bool context_parser
31 val maybe: 'a parser -> 'a option parser
32 val name_source: string parser
33 val name_source_position: (Symbol_Pos.text * Position.T) parser
34 val name: string parser
35 val binding: binding parser
36 val alt_name: string parser
37 val symbol: string parser
38 val liberal_name: string parser
39 val var: indexname parser
40 val internal_text: string parser
41 val internal_typ: typ parser
42 val internal_term: term parser
43 val internal_fact: thm list parser
44 val internal_attribute: (morphism -> attribute) parser
45 val named_text: (string -> string) -> string parser
46 val named_typ: (string -> typ) -> typ parser
47 val named_term: (string -> term) -> term parser
48 val named_fact: (string -> thm list) -> thm list parser
50 (string * Position.T -> morphism -> attribute) -> (morphism -> attribute) parser
51 val typ_abbrev: typ context_parser
52 val typ: typ context_parser
53 val term: term context_parser
54 val term_abbrev: term context_parser
55 val prop: term context_parser
56 val type_name: bool -> string context_parser
57 val const: bool -> string context_parser
58 val const_proper: bool -> string context_parser
59 val goal_spec: ((int -> tactic) -> tactic) context_parser
60 val parse: Token.T list parser
61 val parse1: (string -> bool) -> Token.T list parser
62 val attribs: (string -> string) -> src list parser
63 val opt_attribs: (string -> string) -> src list parser
64 val thm_name: (string -> string) -> string -> (binding * src list) parser
65 val opt_thm_name: (string -> string) -> string -> (binding * src list) parser
66 val syntax: string -> 'a context_parser -> src -> Context.generic -> 'a * Context.generic
67 val context_syntax: string -> 'a context_parser -> src -> Proof.context -> 'a * Proof.context
70 structure Args: ARGS =
75 datatype src = Src of (string * Token.T list) * Position.T;
78 fun dest_src (Src src) = src;
80 fun pretty_src ctxt src =
82 val prt_thm = Pretty.backquote o Display.pretty_thm ctxt;
84 (case Token.get_value arg of
85 SOME (Token.Text s) => Pretty.str (quote s)
86 | SOME (Token.Typ T) => Syntax.pretty_typ ctxt T
87 | SOME (Token.Term t) => Syntax.pretty_term ctxt t
88 | SOME (Token.Fact ths) => Pretty.enclose "(" ")" (Pretty.breaks (map prt_thm ths))
89 | _ => Pretty.str (Token.unparse arg));
90 val (s, args) = #1 (dest_src src);
91 in Pretty.block (Pretty.breaks (Pretty.str s :: map prt args)) end;
93 fun map_name f (Src ((s, args), pos)) = Src ((f s, args), pos);
94 fun map_args f (Src ((s, args), pos)) = Src ((s, map f args), pos);
99 fun transform_values phi = map_args (Token.map_value
100 (fn Token.Text s => Token.Text s
101 | Token.Typ T => Token.Typ (Morphism.typ phi T)
102 | Token.Term t => Token.Term (Morphism.term phi t)
103 | Token.Fact ths => Token.Fact (Morphism.fact phi ths)
104 | Token.Attribute att => Token.Attribute (Morphism.transform phi att)));
106 val assignable = map_args Token.assignable;
107 val closure = map_args Token.closure;
111 (** argument scanners **)
115 fun context x = (Scan.state >> Context.proof_of) x;
116 fun theory x = (Scan.state >> Context.theory_of) x;
121 fun token atom = Scan.ahead Parse.not_eof --| atom;
124 (Parse.short_ident || Parse.long_ident || Parse.sym_ident || Parse.term_var ||
125 Parse.type_ident || Parse.type_var || Parse.number);
127 val string = token (Parse.string || Parse.verbatim);
128 val alt_string = token Parse.alt_string;
129 val symbolic = token Parse.keyword_ident_or_symbolic;
131 fun $$$ x = (ident >> Token.content_of || Parse.keyword)
132 :|-- (fn y => if x = y then Scan.succeed x else Scan.fail);
135 val named = ident || string;
142 val query_colon = $$$ "?" ^^ $$$ ":";
143 val bang_colon = $$$ "!" ^^ $$$ ":";
145 fun parens scan = $$$ "(" |-- scan --| $$$ ")";
146 fun bracks scan = $$$ "[" |-- scan --| $$$ "]";
147 fun mode s = Scan.lift (Scan.optional (parens ($$$ s) >> K true) false);
148 fun maybe scan = $$$ "_" >> K NONE || scan >> SOME;
150 val name_source = named >> Token.source_of;
151 val name_source_position = named >> Token.source_position_of;
153 val name = named >> Token.content_of;
154 val binding = Parse.position name >> Binding.make;
155 val alt_name = alt_string >> Token.content_of;
156 val symbol = symbolic >> Token.content_of;
157 val liberal_name = symbol || name;
159 val var = (ident >> Token.content_of) :|-- (fn x =>
160 (case Lexicon.read_variable x of SOME v => Scan.succeed v | NONE => Scan.fail));
165 fun value dest = Scan.some (fn arg =>
166 (case Token.get_value arg of SOME v => (SOME (dest v) handle Match => NONE) | NONE => NONE));
168 fun evaluate mk eval arg =
169 let val x = eval arg in (Token.assign (SOME (mk x)) arg; x) end;
171 val internal_text = value (fn Token.Text s => s);
172 val internal_typ = value (fn Token.Typ T => T);
173 val internal_term = value (fn Token.Term t => t);
174 val internal_fact = value (fn Token.Fact ths => ths);
175 val internal_attribute = value (fn Token.Attribute att => att);
177 fun named_text intern = internal_text || named >> evaluate Token.Text (intern o Token.content_of);
178 fun named_typ readT = internal_typ || named >> evaluate Token.Typ (readT o Token.source_of);
179 fun named_term read = internal_term || named >> evaluate Token.Term (read o Token.source_of);
181 fun named_fact get = internal_fact || named >> evaluate Token.Fact (get o Token.content_of) ||
182 alt_string >> evaluate Token.Fact (get o Token.source_of);
184 fun named_attribute att =
185 internal_attribute ||
186 named >> evaluate Token.Attribute (fn tok => att (Token.content_of tok, Token.position_of tok));
189 (* terms and types *)
191 val typ_abbrev = Scan.peek (named_typ o Proof_Context.read_typ_abbrev o Context.proof_of);
192 val typ = Scan.peek (named_typ o Syntax.read_typ o Context.proof_of);
193 val term = Scan.peek (named_term o Syntax.read_term o Context.proof_of);
194 val term_abbrev = Scan.peek (named_term o Proof_Context.read_term_abbrev o Context.proof_of);
195 val prop = Scan.peek (named_term o Syntax.read_prop o Context.proof_of);
198 (* type and constant names *)
200 fun type_name strict =
201 Scan.peek (fn ctxt => named_typ (Proof_Context.read_type_name (Context.proof_of ctxt) strict))
202 >> (fn Type (c, _) => c | TFree (a, _) => a | _ => "");
205 Scan.peek (fn ctxt => named_term (Proof_Context.read_const (Context.proof_of ctxt) strict dummyT))
206 >> (fn Const (c, _) => c | Free (x, _) => x | _ => "");
208 fun const_proper strict =
209 Scan.peek (fn ctxt => named_term (Proof_Context.read_const_proper (Context.proof_of ctxt) strict))
210 >> (fn Const (c, _) => c | _ => "");
213 (* improper method arguments *)
216 Parse.nat -- ($$$ "-" |-- Parse.nat) >> (fn (i, j) => fn tac => Seq.INTERVAL tac i j) ||
217 Parse.nat --| $$$ "-" >> (fn i => fn tac => fn st => Seq.INTERVAL tac i (Thm.nprems_of st) st) ||
218 Parse.nat >> (fn i => fn tac => tac i) ||
219 $$$ "!" >> K ALLGOALS;
221 val goal = $$$ "[" |-- Parse.!!! (from_to --| $$$ "]");
222 fun goal_spec x = Scan.lift (Scan.optional goal (fn tac => tac 1)) x;
225 (* arguments within outer syntax *)
227 fun parse_args is_symid =
229 val keyword_symid = token (Parse.keyword_with is_symid);
230 fun atom blk = Parse.group (fn () => "argument")
231 (ident || keyword_symid || string || alt_string || token Parse.float_number ||
232 (if blk then token (Parse.$$$ ",") else Scan.fail));
234 fun args blk x = Scan.optional (args1 blk) [] x
237 (Scan.repeat1 (atom blk) ||
239 argsp "[" "]")) >> flat) x
241 (token (Parse.$$$ l) ::: Parse.!!! (args true @@@ (token (Parse.$$$ r) >> single))) x;
242 in (args, args1) end;
244 val parse = #1 (parse_args Token.ident_or_symbolic) false;
245 fun parse1 is_symid = #2 (parse_args is_symid) false;
252 val attrib_name = internal_text || (symbolic || named)
253 >> evaluate Token.Text (intern o Token.content_of);
254 val attrib = Parse.position (attrib_name -- Parse.!!! parse) >> src;
255 in $$$ "[" |-- Parse.!!! (Parse.list attrib --| $$$ "]") end;
257 fun opt_attribs intern = Scan.optional (attribs intern) [];
260 (* theorem specifications *)
262 fun thm_name intern s = binding -- opt_attribs intern --| $$$ s;
264 fun opt_thm_name intern s =
266 ((binding -- opt_attribs intern || attribs intern >> pair Binding.empty) --| $$$ s)
271 (** syntax wrapper **)
273 fun syntax kind scan (Src ((s, args), pos)) st =
274 (case Scan.error (Scan.finite' Token.stopper (Scan.option scan)) (st, args) of
275 (SOME x, (st', [])) => (x, st')
277 error (kind ^ " " ^ quote s ^ Position.str_of pos ^ ": bad arguments\n " ^
278 space_implode " " (map Token.unparse args')));
280 fun context_syntax kind scan src = apsnd Context.the_proof o syntax kind scan src o Context.Proof;