wenzelm@36949
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(* Title: Pure/Isar/parse.ML
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wenzelm@5826
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Author: Markus Wenzel, TU Muenchen
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wenzelm@5826
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wenzelm@5826
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Generic parsers for Isabelle/Isar outer syntax.
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*)
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wenzelm@5826
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wenzelm@36949
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signature PARSE =
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sig
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type 'a parser = Token.T list -> 'a * Token.T list
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type 'a context_parser = Context.generic * Token.T list -> 'a * (Context.generic * Token.T list)
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val group: string -> (Token.T list -> 'a) -> Token.T list -> 'a
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val !!! : (Token.T list -> 'a) -> Token.T list -> 'a
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wenzelm@36969
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val !!!! : (Token.T list -> 'a) -> Token.T list -> 'a
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wenzelm@12047
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val triple1: ('a * 'b) * 'c -> 'a * 'b * 'c
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wenzelm@12047
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val triple2: 'a * ('b * 'c) -> 'a * 'b * 'c
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wenzelm@12047
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val triple_swap: ('a * 'b) * 'c -> ('a * 'c) * 'b
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wenzelm@36969
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val not_eof: Token.T parser
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wenzelm@36969
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val position: (Token.T list -> 'a * 'b) -> Token.T list -> ('a * Position.T) * 'b
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wenzelm@29310
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val command: string parser
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wenzelm@29310
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val keyword: string parser
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wenzelm@29310
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val short_ident: string parser
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wenzelm@29310
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val long_ident: string parser
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wenzelm@29310
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val sym_ident: string parser
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wenzelm@29310
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val minus: string parser
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wenzelm@29310
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val term_var: string parser
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wenzelm@29310
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val type_ident: string parser
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wenzelm@29310
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val type_var: string parser
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wenzelm@29310
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val number: string parser
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wenzelm@40536
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val float_number: string parser
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wenzelm@29310
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val string: string parser
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wenzelm@29310
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val alt_string: string parser
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wenzelm@29310
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val verbatim: string parser
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wenzelm@29310
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val sync: string parser
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wenzelm@29310
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val eof: string parser
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wenzelm@29310
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val keyword_with: (string -> bool) -> string parser
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wenzelm@29310
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val keyword_ident_or_symbolic: string parser
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wenzelm@29310
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val $$$ : string -> string parser
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wenzelm@29310
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val reserved: string -> string parser
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wenzelm@29310
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val semicolon: string parser
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wenzelm@29310
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val underscore: string parser
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wenzelm@29310
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val maybe: 'a parser -> 'a option parser
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wenzelm@29310
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val tag_name: string parser
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wenzelm@29310
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val tags: string list parser
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wenzelm@29310
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val opt_unit: unit parser
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wenzelm@29310
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val opt_keyword: string -> bool parser
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wenzelm@29310
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val begin: string parser
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wenzelm@29310
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val opt_begin: bool parser
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val nat: int parser
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wenzelm@29310
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val int: int parser
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wenzelm@40536
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val real: real parser
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wenzelm@29310
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val enum: string -> 'a parser -> 'a list parser
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wenzelm@29310
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val enum1: string -> 'a parser -> 'a list parser
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wenzelm@29310
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val and_list: 'a parser -> 'a list parser
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wenzelm@29310
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val and_list1: 'a parser -> 'a list parser
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wenzelm@30516
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val enum': string -> 'a context_parser -> 'a list context_parser
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wenzelm@30516
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val enum1': string -> 'a context_parser -> 'a list context_parser
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wenzelm@30516
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val and_list': 'a context_parser -> 'a list context_parser
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wenzelm@30516
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val and_list1': 'a context_parser -> 'a list context_parser
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wenzelm@29310
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val list: 'a parser -> 'a list parser
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wenzelm@29310
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val list1: 'a parser -> 'a list parser
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wenzelm@29310
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val name: bstring parser
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haftmann@29581
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val binding: binding parser
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wenzelm@29310
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val xname: xstring parser
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wenzelm@29310
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val text: string parser
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wenzelm@29310
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val path: Path.T parser
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wenzelm@29310
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val parname: string parser
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haftmann@29581
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val parbinding: binding parser
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wenzelm@29310
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val sort: string parser
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wenzelm@29310
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val arity: (string * string list * string) parser
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wenzelm@29310
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val multi_arity: (string list * string list * string) parser
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wenzelm@29310
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val type_args: string list parser
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wenzelm@35838
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val type_args_constrained: (string * string option) list parser
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wenzelm@29310
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val typ_group: string parser
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wenzelm@29310
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val typ: string parser
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wenzelm@29310
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val mixfix: mixfix parser
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val mixfix': mixfix parser
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wenzelm@29310
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val opt_mixfix: mixfix parser
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wenzelm@29310
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val opt_mixfix': mixfix parser
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wenzelm@29310
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val where_: string parser
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wenzelm@29310
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val const: (string * string * mixfix) parser
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wenzelm@30345
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val const_binding: (binding * string * mixfix) parser
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haftmann@29581
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val params: (binding * string option) list parser
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haftmann@29581
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val simple_fixes: (binding * string option) list parser
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haftmann@29581
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val fixes: (binding * string option * mixfix) list parser
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val for_fixes: (binding * string option * mixfix) list parser
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haftmann@29581
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val for_simple_fixes: (binding * string option) list parser
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wenzelm@30576
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val ML_source: (Symbol_Pos.text * Position.T) parser
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wenzelm@30576
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val doc_source: (Symbol_Pos.text * Position.T) parser
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wenzelm@29310
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val term_group: string parser
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wenzelm@29310
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val prop_group: string parser
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wenzelm@29310
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val term: string parser
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wenzelm@29310
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val prop: string parser
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wenzelm@41045
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val literal_fact: string parser
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wenzelm@29310
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val propp: (string * string list) parser
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wenzelm@29310
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val termp: (string * string list) parser
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wenzelm@29310
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val target: xstring parser
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wenzelm@29310
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val opt_target: xstring option parser
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wenzelm@5826
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end;
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structure Parse: PARSE =
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struct
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type 'a parser = Token.T list -> 'a * Token.T list;
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wenzelm@36969
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type 'a context_parser = Context.generic * Token.T list -> 'a * (Context.generic * Token.T list);
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wenzelm@29310
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wenzelm@5826
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wenzelm@5826
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(** error handling **)
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wenzelm@5826
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(* group atomic parsers (no cuts!) *)
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wenzelm@5826
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fun fail_with s = Scan.fail_with
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(fn [] => s ^ " expected (past end-of-file!)"
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wenzelm@23789
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| (tok :: _) =>
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wenzelm@36969
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(case Token.text_of tok of
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wenzelm@36969
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(txt, "") =>
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s ^ " expected,\nbut " ^ txt ^ Token.pos_of tok ^ " was found"
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| (txt1, txt2) =>
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s ^ " expected,\nbut " ^ txt1 ^ Token.pos_of tok ^ " was found:\n" ^ txt2));
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wenzelm@5826
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wenzelm@5826
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fun group s scan = scan || fail_with s;
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wenzelm@5826
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wenzelm@5826
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wenzelm@5877
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(* cut *)
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wenzelm@5826
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wenzelm@8581
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fun cut kind scan =
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let
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fun get_pos [] = " (past end-of-file!)"
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| get_pos (tok :: _) = Token.pos_of tok;
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wenzelm@5826
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skalberg@15531
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fun err (toks, NONE) = kind ^ get_pos toks
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wenzelm@25625
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| err (toks, SOME msg) =
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wenzelm@25625
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if String.isPrefix kind msg then msg
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else kind ^ get_pos toks ^ ": " ^ msg;
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in Scan.!! err scan end;
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wenzelm@5826
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wenzelm@8586
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fun !!! scan = cut "Outer syntax error" scan;
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wenzelm@8586
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fun !!!! scan = cut "Corrupted outer syntax in presentation" scan;
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wenzelm@8581
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wenzelm@5826
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wenzelm@5826
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wenzelm@5826
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(** basic parsers **)
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wenzelm@5826
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(* utils *)
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fun triple1 ((x, y), z) = (x, y, z);
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fun triple2 (x, (y, z)) = (x, y, z);
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wenzelm@6430
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fun triple_swap ((x, y), z) = ((x, z), y);
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wenzelm@5826
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wenzelm@5826
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(* tokens *)
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fun RESET_VALUE atom = (*required for all primitive parsers*)
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Scan.ahead (Scan.one (K true)) -- atom >> (fn (arg, x) => (Token.assign NONE arg; x));
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wenzelm@27815
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wenzelm@27815
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wenzelm@36969
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val not_eof = RESET_VALUE (Scan.one Token.not_eof);
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wenzelm@15703
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fun position scan = (Scan.ahead not_eof >> Token.position_of) -- scan >> Library.swap;
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fun source_position atom = Scan.ahead atom |-- not_eof >> Token.source_position_of;
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fun inner_syntax atom = Scan.ahead atom |-- not_eof >> Token.source_of;
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wenzelm@5826
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wenzelm@5826
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fun kind k =
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group (Token.str_of_kind k) (RESET_VALUE (Scan.one (Token.is_kind k) >> Token.content_of));
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wenzelm@5826
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wenzelm@36969
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val command = kind Token.Command;
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wenzelm@36969
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val keyword = kind Token.Keyword;
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wenzelm@36969
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val short_ident = kind Token.Ident;
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wenzelm@36969
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val long_ident = kind Token.LongIdent;
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wenzelm@36969
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val sym_ident = kind Token.SymIdent;
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val term_var = kind Token.Var;
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val type_ident = kind Token.TypeIdent;
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wenzelm@36969
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val type_var = kind Token.TypeVar;
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wenzelm@36969
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val number = kind Token.Nat;
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wenzelm@40536
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val float_number = kind Token.Float;
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wenzelm@36969
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val string = kind Token.String;
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wenzelm@36969
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val alt_string = kind Token.AltString;
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wenzelm@36969
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val verbatim = kind Token.Verbatim;
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wenzelm@36969
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val sync = kind Token.Sync;
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wenzelm@36969
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val eof = kind Token.EOF;
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wenzelm@5826
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wenzelm@36969
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fun keyword_with pred = RESET_VALUE (Scan.one (Token.keyword_with pred) >> Token.content_of);
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wenzelm@36969
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val keyword_ident_or_symbolic = keyword_with Token.ident_or_symbolic;
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wenzelm@27815
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wenzelm@5826
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fun $$$ x =
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wenzelm@36969
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group (Token.str_of_kind Token.Keyword ^ " " ^ quote x) (keyword_with (fn y => x = y));
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wenzelm@9131
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wenzelm@16030
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fun reserved x =
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wenzelm@27753
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group ("reserved identifier " ^ quote x)
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wenzelm@36969
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(RESET_VALUE (Scan.one (Token.ident_with (fn y => x = y)) >> Token.content_of));
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wenzelm@16030
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wenzelm@9131
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val semicolon = $$$ ";";
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wenzelm@5826
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wenzelm@15703
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val minus = sym_ident :-- (fn "-" => Scan.succeed () | _ => Scan.fail) >> #1;
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wenzelm@11792
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val underscore = sym_ident :-- (fn "_" => Scan.succeed () | _ => Scan.fail) >> #1;
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wenzelm@15703
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fun maybe scan = underscore >> K NONE || scan >> SOME;
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wenzelm@11792
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wenzelm@14835
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val nat = number >> (#1 o Library.read_int o Symbol.explode);
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wenzelm@27815
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val int = Scan.optional (minus >> K ~1) 1 -- nat >> op *;
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wenzelm@40542
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val real = float_number >> (the o Real.fromString) || int >> Real.fromInt;
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wenzelm@5826
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wenzelm@17070
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val tag_name = group "tag name" (short_ident || string);
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wenzelm@17070
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val tags = Scan.repeat ($$$ "%" |-- !!! tag_name);
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wenzelm@17070
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wenzelm@7930
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val opt_unit = Scan.optional ($$$ "(" -- $$$ ")" >> (K ())) ();
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wenzelm@14646
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fun opt_keyword s = Scan.optional ($$$ "(" |-- !!! (($$$ s >> K true) --| $$$ ")")) false;
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wenzelm@14646
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wenzelm@20983
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val begin = $$$ "begin";
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wenzelm@20983
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val opt_begin = Scan.optional (begin >> K true) false;
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wenzelm@20961
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wenzelm@5826
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wenzelm@5826
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(* enumerations *)
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wenzelm@5826
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wenzelm@25999
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fun enum1 sep scan = scan ::: Scan.repeat ($$$ sep |-- !!! scan);
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wenzelm@5826
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fun enum sep scan = enum1 sep scan || Scan.succeed [];
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wenzelm@5826
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wenzelm@27815
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fun enum1' sep scan = scan ::: Scan.repeat (Scan.lift ($$$ sep) |-- scan);
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wenzelm@27815
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fun enum' sep scan = enum1' sep scan || Scan.succeed [];
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wenzelm@5826
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wenzelm@6013
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fun and_list1 scan = enum1 "and" scan;
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wenzelm@6013
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fun and_list scan = enum "and" scan;
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wenzelm@6013
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wenzelm@27815
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fun and_list1' scan = enum1' "and" scan;
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wenzelm@27815
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fun and_list' scan = enum' "and" scan;
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wenzelm@27815
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wenzelm@27815
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fun list1 scan = enum1 "," scan;
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wenzelm@27815
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fun list scan = enum "," scan;
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wenzelm@27815
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wenzelm@5826
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wenzelm@5960
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(* names and text *)
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wenzelm@5826
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wenzelm@8146
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val name = group "name declaration" (short_ident || sym_ident || string || number);
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wenzelm@30227
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val binding = position name >> Binding.make;
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wenzelm@8146
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val xname = group "name reference" (short_ident || long_ident || sym_ident || string || number);
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wenzelm@8146
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val text = group "text" (short_ident || long_ident || sym_ident || string || number || verbatim);
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wenzelm@21858
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val path = group "file name/path specification" name >> Path.explode;
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wenzelm@6553
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wenzelm@18898
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val parname = Scan.optional ($$$ "(" |-- name --| $$$ ")") "";
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haftmann@28965
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val parbinding = Scan.optional ($$$ "(" |-- binding --| $$$ ")") Binding.empty;
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wenzelm@18898
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wenzelm@6553
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wenzelm@6372
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(* sorts and arities *)
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wenzelm@5826
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wenzelm@27753
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val sort = group "sort" (inner_syntax xname);
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wenzelm@5826
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wenzelm@22331
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val arity = xname -- ($$$ "::" |-- !!!
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wenzelm@22331
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(Scan.optional ($$$ "(" |-- !!! (list1 sort --| $$$ ")")) [] -- sort)) >> triple2;
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wenzelm@5826
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haftmann@25541
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val multi_arity = and_list1 xname -- ($$$ "::" |-- !!!
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haftmann@25541
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(Scan.optional ($$$ "(" |-- !!! (list1 sort --| $$$ ")")) [] -- sort)) >> triple2;
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haftmann@25541
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wenzelm@5826
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wenzelm@5826
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(* types *)
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wenzelm@5826
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253 |
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wenzelm@27753
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val typ_group = group "type"
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wenzelm@8146
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(short_ident || long_ident || sym_ident || type_ident || type_var || string || number);
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wenzelm@5826
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wenzelm@27753
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val typ = inner_syntax typ_group;
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wenzelm@27753
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wenzelm@35838
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fun type_arguments arg =
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wenzelm@35838
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arg >> single ||
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wenzelm@35838
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$$$ "(" |-- !!! (list1 arg --| $$$ ")") ||
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wenzelm@5826
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Scan.succeed [];
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wenzelm@5826
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wenzelm@35838
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val type_args = type_arguments type_ident;
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wenzelm@35838
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val type_args_constrained = type_arguments (type_ident -- Scan.option ($$$ "::" |-- !!! sort));
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wenzelm@35838
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wenzelm@5826
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wenzelm@5826
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(* mixfix annotations *)
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wenzelm@5826
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269 |
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wenzelm@18669
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val mfix = string --
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wenzelm@18669
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!!! (Scan.optional ($$$ "[" |-- !!! (list nat --| $$$ "]")) [] --
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wenzelm@18669
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Scan.optional nat Syntax.max_pri) >> (Mixfix o triple2);
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wenzelm@5826
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wenzelm@35130
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val infx = $$$ "infix" |-- !!! (string -- nat >> Infix);
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wenzelm@35130
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val infxl = $$$ "infixl" |-- !!! (string -- nat >> Infixl);
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wenzelm@35130
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val infxr = $$$ "infixr" |-- !!! (string -- nat >> Infixr);
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wenzelm@5826
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277 |
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wenzelm@18669
|
278 |
val binder = $$$ "binder" |--
|
wenzelm@18669
|
279 |
!!! (string -- ($$$ "[" |-- nat --| $$$ "]" -- nat || nat >> (fn n => (n, n))))
|
wenzelm@18669
|
280 |
>> (Binder o triple2);
|
wenzelm@5826
|
281 |
|
wenzelm@18669
|
282 |
fun annotation guard fix = $$$ "(" |-- guard (fix --| $$$ ")");
|
wenzelm@18669
|
283 |
fun opt_annotation guard fix = Scan.optional (annotation guard fix) NoSyn;
|
wenzelm@5826
|
284 |
|
wenzelm@18669
|
285 |
val mixfix = annotation !!! (mfix || binder || infxl || infxr || infx);
|
wenzelm@21609
|
286 |
val mixfix' = annotation I (mfix || binder || infxl || infxr || infx);
|
wenzelm@18669
|
287 |
val opt_mixfix = opt_annotation !!! (mfix || binder || infxl || infxr || infx);
|
wenzelm@18669
|
288 |
val opt_mixfix' = opt_annotation I (mfix || binder || infxl || infxr || infx);
|
wenzelm@5826
|
289 |
|
wenzelm@5826
|
290 |
|
wenzelm@18669
|
291 |
(* fixes *)
|
wenzelm@5826
|
292 |
|
wenzelm@21400
|
293 |
val where_ = $$$ "where";
|
wenzelm@21400
|
294 |
|
wenzelm@18618
|
295 |
val const = name -- ($$$ "::" |-- !!! typ) -- opt_mixfix >> triple1;
|
wenzelm@30345
|
296 |
val const_binding = binding -- ($$$ "::" |-- !!! typ) -- opt_mixfix >> triple1;
|
wenzelm@18669
|
297 |
|
wenzelm@28081
|
298 |
val params = Scan.repeat1 binding -- Scan.option ($$$ "::" |-- !!! typ)
|
wenzelm@18669
|
299 |
>> (fn (xs, T) => map (rpair T) xs);
|
wenzelm@18669
|
300 |
|
wenzelm@19482
|
301 |
val simple_fixes = and_list1 params >> flat;
|
wenzelm@18669
|
302 |
|
wenzelm@18669
|
303 |
val fixes =
|
wenzelm@28081
|
304 |
and_list1 (binding -- Scan.option ($$$ "::" |-- typ) -- mixfix >> (single o triple1) ||
|
wenzelm@19482
|
305 |
params >> map Syntax.no_syn) >> flat;
|
wenzelm@5826
|
306 |
|
wenzelm@19845
|
307 |
val for_fixes = Scan.optional ($$$ "for" |-- !!! fixes) [];
|
wenzelm@21371
|
308 |
val for_simple_fixes = Scan.optional ($$$ "for" |-- !!! simple_fixes) [];
|
wenzelm@19845
|
309 |
|
wenzelm@5826
|
310 |
|
wenzelm@27877
|
311 |
(* embedded source text *)
|
wenzelm@27872
|
312 |
|
wenzelm@27877
|
313 |
val ML_source = source_position (group "ML source" text);
|
wenzelm@27872
|
314 |
val doc_source = source_position (group "document source" text);
|
wenzelm@27872
|
315 |
|
wenzelm@27872
|
316 |
|
wenzelm@5826
|
317 |
(* terms *)
|
wenzelm@5826
|
318 |
|
wenzelm@41045
|
319 |
val tm = short_ident || long_ident || sym_ident || term_var || number || string;
|
wenzelm@5826
|
320 |
|
wenzelm@41045
|
321 |
val term_group = group "term" tm;
|
wenzelm@41045
|
322 |
val prop_group = group "proposition" tm;
|
wenzelm@27753
|
323 |
|
wenzelm@27753
|
324 |
val term = inner_syntax term_group;
|
wenzelm@27753
|
325 |
val prop = inner_syntax prop_group;
|
wenzelm@5826
|
326 |
|
wenzelm@41045
|
327 |
val literal_fact = inner_syntax (group "literal fact" alt_string);
|
wenzelm@41045
|
328 |
|
wenzelm@5826
|
329 |
|
wenzelm@6949
|
330 |
(* patterns *)
|
wenzelm@6935
|
331 |
|
wenzelm@6949
|
332 |
val is_terms = Scan.repeat1 ($$$ "is" |-- term);
|
wenzelm@6935
|
333 |
val is_props = Scan.repeat1 ($$$ "is" |-- prop);
|
wenzelm@6935
|
334 |
|
wenzelm@19585
|
335 |
val propp = prop -- Scan.optional ($$$ "(" |-- !!! (is_props --| $$$ ")")) [];
|
wenzelm@6949
|
336 |
val termp = term -- Scan.optional ($$$ "(" |-- !!! (is_terms --| $$$ ")")) [];
|
wenzelm@6935
|
337 |
|
wenzelm@6935
|
338 |
|
wenzelm@22119
|
339 |
(* targets *)
|
wenzelm@5826
|
340 |
|
wenzelm@22119
|
341 |
val target = ($$$ "(" -- $$$ "in") |-- !!! (xname --| $$$ ")");
|
wenzelm@22119
|
342 |
val opt_target = Scan.option target;
|
wenzelm@12272
|
343 |
|
wenzelm@12272
|
344 |
end;
|
wenzelm@30516
|
345 |
|
wenzelm@36949
|
346 |
type 'a parser = 'a Parse.parser;
|
wenzelm@36949
|
347 |
type 'a context_parser = 'a Parse.context_parser;
|
wenzelm@30516
|
348 |
|