# HG changeset patch # User wenzelm # Date 910621992 -3600 # Node ID 977f789566b7a388206c95b8822f2d6655c839ac # Parent 24e4b1780d33428e1e7df5311b6e13598a22f33a Generic parsers for Isabelle/Isar outer syntax. diff -r 24e4b1780d33 -r 977f789566b7 src/Pure/Isar/outer_parse.ML --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/Pure/Isar/outer_parse.ML Mon Nov 09 15:33:12 1998 +0100 @@ -0,0 +1,255 @@ +(* Title: Pure/Isar/outer_parse.ML + ID: $Id$ + Author: Markus Wenzel, TU Muenchen + +Generic parsers for Isabelle/Isar outer syntax. +*) + +signature OUTER_PARSE = +sig + type token + val group: string -> (token list -> 'a) -> token list -> 'a + val !!! : (token list -> 'a) -> token list -> 'a + val $$$ : string -> token list -> string * token list + val position: (token list -> 'a * 'b) -> token list -> ('a * Position.T) * 'b + val keyword: token list -> string * token list + val short_ident: token list -> string * token list + val long_ident: token list -> string * token list + val sym_ident: token list -> string * token list + val term_var: token list -> string * token list + val text_var: token list -> string * token list + val type_ident: token list -> string * token list + val type_var: token list -> string * token list + val number: token list -> string * token list + val string: token list -> string * token list + val verbatim: token list -> string * token list + val eof: token list -> string * token list + val not_eof: token list -> token * token list + val nat: token list -> int * token list + val enum: string -> (token list -> 'a * token list) -> token list -> 'a list * token list + val enum1: string -> (token list -> 'a * token list) -> token list -> 'a list * token list + val list: (token list -> 'a * token list) -> token list -> 'a list * token list + val list1: (token list -> 'a * token list) -> token list -> 'a list * token list + val name: token list -> bstring * token list + val xname: token list -> xstring * token list + val text: token list -> string * token list + val sort: token list -> xsort * token list + val arity: token list -> (xsort list * xsort) * token list + val type_args: token list -> string list * token list + val typ: token list -> string * token list + val opt_infix: token list -> Syntax.mixfix * token list + val opt_mixfix: token list -> Syntax.mixfix * token list + val const: token list -> (bstring * string * Syntax.mixfix) * token list + val term: token list -> string * token list + val prop: token list -> string * token list + val args: token list -> Args.T list * token list + val args1: token list -> Args.T list * token list + val attribs: token list -> Args.src list * token list + val opt_attribs: token list -> Args.src list * token list + val thm_name: token list -> (bstring * Args.src list) * token list + val opt_thm_name: token list -> (bstring * Args.src list) * token list + val thm_xname: token list -> (xstring * Args.src list) * token list + val method: token list -> Method.text * token list + val triple1: ('a * 'b) * 'c -> 'a * 'b * 'c + val triple2: 'a * ('b * 'c) -> 'a * 'b * 'c +end; + +structure OuterParse: OUTER_PARSE = +struct + +type token = OuterLex.token; + + +(** error handling **) + +(* group atomic parsers (no cuts!) *) + +fun fail_with s = Scan.fail_with + (fn [] => s ^ " expected (past end-of-file!)" + | (tok :: _) => s ^ " expected,\nbut " ^ OuterLex.name_of tok ^ " " ^ + quote (OuterLex.val_of tok) ^ OuterLex.pos_of tok ^ " was found"); + +fun group s scan = scan || fail_with s; + + +(* cut alternatives *) + +fun !!! scan = + let + fun get_pos [] = " (past end-of-file!)" + | get_pos (tok :: _) = OuterLex.pos_of tok; + + fun err (toks, None) = "Outer syntax error" ^ get_pos toks + | err (toks, Some msg) = "Outer syntax error" ^ get_pos toks ^ ": " ^ msg; + in Scan.!! err scan end; + + + +(** basic parsers **) + +(* utils *) + +fun triple1 ((x, y), z) = (x, y, z); +fun triple2 (x, (y, z)) = (x, y, z); + + +(* tokens *) + +fun position scan = + (Scan.ahead (Scan.one OuterLex.not_eof) >> OuterLex.position_of) -- scan >> Library.swap; + +fun kind k = + group (OuterLex.str_of_kind k) + (Scan.one (OuterLex.is_kind k) >> OuterLex.val_of); + +val keyword = kind OuterLex.Keyword; +val short_ident = kind OuterLex.Ident; +val long_ident = kind OuterLex.LongIdent; +val sym_ident = kind OuterLex.SymIdent; +val term_var = kind OuterLex.Var; +val text_var = kind OuterLex.TextVar; +val type_ident = kind OuterLex.TypeIdent; +val type_var = kind OuterLex.TypeVar; +val number = kind OuterLex.Nat; +val string = kind OuterLex.String; +val verbatim = kind OuterLex.Verbatim; +val eof = kind OuterLex.EOF; + +fun $$$ x = + group (OuterLex.str_of_kind OuterLex.Keyword ^ " " ^ quote x) + (Scan.one (OuterLex.is_kind OuterLex.Keyword andf (equal x o OuterLex.val_of)) + >> OuterLex.val_of); + +val nat = number >> (fst o Term.read_int o explode); + +val not_eof = Scan.one OuterLex.not_eof; + + +(* enumerations *) + +fun enum1 sep scan = scan -- Scan.repeat ($$$ sep |-- scan) >> op ::; +fun enum sep scan = enum1 sep scan || Scan.succeed []; + +fun list1 scan = enum1 "," scan; +fun list scan = enum "," scan; + + +(* names *) + +val name = group "name declaration" (short_ident || string); +val xname = group "name reference" (short_ident || long_ident || string); +val text = group "text" (short_ident || long_ident || string || verbatim); + + +(* sorts *) + +val sort = + xname >> single || $$$ "{" |-- !!! (list xname --| $$$ "}"); + +val arity = + Scan.optional ($$$ "(" |-- !!! (Scan.repeat1 sort --| $$$ ")")) [] -- sort; + + +(* types *) + +val typ = + group "type" (short_ident || long_ident || type_ident || type_var || string); + +val type_args = + type_ident >> single || + $$$ "(" |-- !!! (list1 type_ident --| $$$ ")") || + Scan.succeed []; + + +(* mixfix annotations *) + +val infxl = $$$ "infixl" |-- !!! (nat >> Syntax.Infixl || string -- nat >> Syntax.InfixlName); +val infxr = $$$ "infixr" |-- !!! (nat >> Syntax.Infixr || string -- nat >> Syntax.InfixrName); + +val binder = + $$$ "binder" |-- + !!! (string -- ($$$ "[" |-- nat --| $$$ "]" -- nat || nat >> (fn n => (n, n)))) + >> (Syntax.Binder o triple2); + + +val opt_pris = Scan.optional ($$$ "[" |-- !!! (list nat --| $$$ "]")) []; + +val mixfix = + string -- opt_pris -- Scan.optional nat Syntax.max_pri + >> (Syntax.Mixfix o triple1); + +fun opt_fix fix = + Scan.optional ($$$ "(" |-- !!! (fix --| $$$ ")")) Syntax.NoSyn; + +val opt_infix = opt_fix (infxl || infxr); +val opt_mixfix = opt_fix (mixfix || infxl || infxr || binder); + + +(* consts *) + +val const = + name -- ($$$ "::" |-- !!! (typ -- opt_mixfix)) >> triple2; + + +(* terms *) + +val trm = short_ident || long_ident || term_var || text_var || string; + +val term = group "term" trm; +val prop = group "proposition" trm; + + +(* arguments *) + +val keyword_symid = Scan.one (OuterLex.keyword_pred OuterLex.is_symid) >> OuterLex.val_of; + +val atom_arg = + group "argument" + ((short_ident || long_ident || sym_ident || number) >> Args.ident || + keyword_symid >> Args.keyword || + string >> Args.string); + +fun paren_args l r scan = $$$ l -- !!! (scan -- $$$ r) + >> (fn (x, (ys, z)) => Args.keyword x :: ys @ [Args.keyword z]); + +fun args x = Scan.optional args1 [] x +and args1 x = + ((Scan.repeat1 + (Scan.repeat1 atom_arg || + paren_args "(" ")" args || + paren_args "{" "}" args || + paren_args "[" "]" args)) >> flat) x; + + +(* theorem names *) + +val attrib = position (xname -- !!! args); + +val attribs = $$$ "[" |-- !!! (list attrib --| $$$ "]"); +val opt_attribs = Scan.optional attribs []; + +val thm_name = name -- opt_attribs --| $$$ ":"; +val opt_thm_name = Scan.optional thm_name ("", []); +val thm_xname = xname -- opt_attribs --| $$$ ":"; + + +(* proof methods *) + +fun meth4 x = + (position (xname >> rpair []) >> Method.Source || + $$$ "(" |-- meth0 --| $$$ ")") x +and meth3 x = + (position (xname -- args1) >> Method.Source || + meth4) x +and meth2 x = + (meth4 --| $$$ "?" >> Method.Try || + meth4 --| $$$ "*" >> Method.Repeat || + meth4 --| $$$ "+" >> Method.Repeat1 || + meth3) x +and meth1 x = (enum1 "," meth2 >> (fn [m] => m | ms => Method.Then ms)) x +and meth0 x = (enum1 "|" meth1 >> (fn [m] => m | ms => Method.Orelse ms)) x; + +val method = meth2; + + +end;