diff -r 000000000000 -r a5a9c433f639 src/Pure/Thy/parse.ML
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/Pure/Thy/parse.ML	Thu Sep 16 12:20:38 1993 +0200
@@ -0,0 +1,134 @@
+(*  Title: 	Pure/Thy/parse
+    ID:         $Id$
+    Author: 	Sonia Mahjoub / Tobias Nipkow
+    Copyright   1992  TU Muenchen
+
+The parser combinators.
+Adapted from Larry Paulson's ML for the Working Programmer.
+*)
+
+(*Global infix declarations for the parsing primitives*)
+infix 5 -- --$$ $$--;
+infix 3 >>;
+infix 0 ||;
+
+
+signature PARSE = 
+sig
+
+type token
+val $$     : string -> 
+             (token * int) list -> string * (token * int)list 
+val id     : (token * int) list -> string * (token * int)list 
+val nat    : (token * int) list -> string * (token * int)list 
+val stg    : (token * int) list -> string * (token * int)list 
+val txt    : (token * int) list -> string * (token * int)list 
+val >>     : ('a -> 'b * 'c) * ('b -> 'd) -> 'a -> 'd * 'c
+val ||     : ('a -> 'b) * ('a -> 'b) -> 'a -> 'b 
+val --     : ('a -> 'b * 'c) * ('c -> 'd * 'e) -> 
+             'a -> ('b * 'd) * 'e
+val $$--   : string * ((token * int)list -> 'b * 'c) -> 
+             (token * int) list -> 'b * 'c
+val --$$   : ( 'a -> 'b * (token * int)list ) * string -> 
+             'a -> 'b * (token * int)list 
+val !!     : ((token * int) list -> 'a * (token * int) list ) 
+             -> (token * int) list -> 'a * (token * int) list 
+val empty  : 'a -> 'b list * 'a
+val repeat : ('a -> 'b * 'a) -> 'a -> 'b list * 'a
+val repeat1: ('a -> 'b * 'a) -> 'a -> 'b list * 'a
+val list_of: ((token * int)list -> 'b * (token * int)list ) -> 
+             (token * int)list  -> 'b list * (token * int)list 
+val list_of1: ((token * int)list -> 'b * (token * int)list ) -> 
+             (token * int)list  -> 'b list * (token * int)list 
+val reader : ((token * int) list -> 'a * ('b * int) list )
+              -> string list -> 'a
+
+end;
+
+
+
+functor ParseFUN (Lex: LEXICAL): PARSE =
+struct
+
+type token = Lex.token;
+
+datatype synerr = Line of string * string * int | EOF of string;
+
+exception SynError of synerr;
+
+fun synerr(Line(s1, s2, n)) =
+      error("Syntax error on line " ^ (string_of_int n) ^ ": " ^ s1 ^
+            " expected and " ^ s2 ^ " was found")
+  | synerr(EOF(s)) = error("Syntax error on last line: " ^ s ^
+                           " expected and end-of-file was found"); 
+
+fun string_of_token (Lex.Key b) = b
+  | string_of_token (Lex.Id b)  = b
+  | string_of_token (Lex.Nat b) = b
+  | string_of_token (Lex.Txt b) = b
+  | string_of_token (Lex.Stg b) = b;
+
+fun line_err x = raise SynError(Line x);
+fun eof_err s =  raise SynError(EOF s);
+
+fun $$a ((Lex.Key b,n) :: toks) =
+           if a = b then (a,toks) else line_err(a,b,n) 
+  | $$a ((t,n) :: toks) = line_err (a,string_of_token t, n)
+  | $$a _ = eof_err a;
+
+
+fun id ((Lex.Id b,n) :: toks) = (b, toks)
+  | id ((t,n) :: toks) = line_err ("identifier", string_of_token t, n)
+  | id _ = eof_err "identifier";
+
+
+fun nat ((Lex.Nat b,n) :: toks) = (b, toks)
+  | nat ((t,n) :: toks) = 
+	line_err ("natural number", string_of_token t, n)
+  | nat _ = eof_err "natural number";
+
+
+fun stg ((Lex.Stg b,n) :: toks) = (b, toks)
+  | stg ((t,n) :: toks) = line_err("string", string_of_token t, n)
+  | stg _ = eof_err"string";
+
+
+fun txt ((Lex.Txt b,n) :: toks) = (b, toks)
+  | txt ((t,n) :: toks) = line_err ("ML text", string_of_token t, n)
+  | txt _ = eof_err "ML text";
+
+
+fun ( ph >> f) toks = let val (x, toks2) = ph toks in (f x, toks2) end;
+
+fun (ph1 || ph2) toks = ph1 toks handle SynError _ => ph2 toks;
+
+
+fun (ph1 -- ph2) toks =
+    let val (x, toks2) = ph1 toks
+        val (y, toks3) = ph2 toks2
+    in ((x,y), toks3) end;
+
+fun (a $$-- ph)  =  $$a -- ph >> #2;
+
+fun (ph --$$ a)  =  ph -- $$a >> #1;
+
+fun !! ph toks = ph toks handle SynError s => synerr s;
+
+fun empty toks = ([], toks);
+
+fun repeat ph toks  = (   ph -- repeat ph >> (op::)
+                       || empty ) toks; 
+
+fun repeat1 ph  =  ph -- repeat ph >> (op::);
+
+fun list_of1 ph =  ph -- repeat("," $$-- !! ph) >> (op::);
+fun list_of ph  =  list_of1 ph || empty;
+
+fun reader ph a = 
+       ( case ph (Lex.scan a) of 
+                (x,  []) => x
+              | (_,(_, n)::_) => error
+                ("Syntax error on line " ^ (string_of_int n) ^ ": " ^
+                 "Extra characters in phrase")
+       );
+end;