added Isar/value_parse.ML: Outer syntax parsers for basic ML values.

--- a/src/Pure/IsaMakefile	Fri Jan 02 15:44:32 2009 +0100
+++ b/src/Pure/IsaMakefile	Fri Jan 02 15:44:32 2009 +0100
@@ -47,15 +47,15 @@
   Isar/proof_display.ML Isar/proof_node.ML Isar/rule_cases.ML		\
   Isar/rule_insts.ML Isar/session.ML Isar/skip_proof.ML			\
   Isar/spec_parse.ML Isar/specification.ML Isar/subclass.ML		\
-  Isar/theory_target.ML Isar/toplevel.ML ML-Systems/alice.ML		\
-  ML-Systems/exn.ML ML-Systems/install_pp_polyml.ML			\
-  ML-Systems/ml_name_space.ML ML-Systems/multithreading.ML		\
-  ML-Systems/mosml.ML ML-Systems/multithreading_polyml.ML		\
-  ML-Systems/overloading_smlnj.ML ML-Systems/polyml-4.1.3.ML		\
-  ML-Systems/polyml-4.1.4.ML ML-Systems/polyml-4.2.0.ML			\
-  ML-Systems/polyml-5.0.ML ML-Systems/polyml-5.1.ML			\
-  ML-Systems/polyml_common.ML ML-Systems/polyml.ML			\
-  ML-Systems/polyml_old_compiler4.ML					\
+  Isar/theory_target.ML Isar/toplevel.ML Isar/value_parse.ML		\
+  ML-Systems/alice.ML ML-Systems/exn.ML					\
+  ML-Systems/install_pp_polyml.ML ML-Systems/ml_name_space.ML		\
+  ML-Systems/multithreading.ML ML-Systems/mosml.ML			\
+  ML-Systems/multithreading_polyml.ML ML-Systems/overloading_smlnj.ML	\
+  ML-Systems/polyml-4.1.3.ML ML-Systems/polyml-4.1.4.ML			\
+  ML-Systems/polyml-4.2.0.ML ML-Systems/polyml-5.0.ML			\
+  ML-Systems/polyml-5.1.ML ML-Systems/polyml_common.ML			\
+  ML-Systems/polyml.ML ML-Systems/polyml_old_compiler4.ML		\
   ML-Systems/polyml_old_compiler5.ML ML-Systems/proper_int.ML		\
   ML-Systems/smlnj.ML ML-Systems/system_shell.ML			\
   ML-Systems/time_limit.ML ML-Systems/thread_dummy.ML			\

--- a/src/Pure/Isar/ROOT.ML	Fri Jan 02 15:44:32 2009 +0100
+++ b/src/Pure/Isar/ROOT.ML	Fri Jan 02 15:44:32 2009 +0100
@@ -1,5 +1,4 @@
 (*  Title:      Pure/Isar/ROOT.ML
-    ID:         $Id$
     Author:     Markus Wenzel, TU Muenchen
 
 Isar -- Intelligible Semi-Automated Reasoning for Isabelle.
@@ -21,8 +20,9 @@
 
 (*outer syntax*)
 use "outer_lex.ML";
+use "outer_keyword.ML";
 use "outer_parse.ML";
-use "outer_keyword.ML";
+use "value_parse.ML";
 use "args.ML";
 use "antiquote.ML";
 use "../ML/ml_context.ML";

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/Pure/Isar/value_parse.ML	Fri Jan 02 15:44:32 2009 +0100
@@ -0,0 +1,45 @@
+(*  Title:      Pure/Isar/value_parse.ML
+    Author:     Makarius
+
+Outer syntax parsers for basic ML values.
+*)
+
+signature VALUE_PARSE =
+sig
+  type 'a parser = 'a OuterParse.parser
+  val comma: 'a parser -> 'a parser
+  val equal: 'a parser -> 'a parser
+  val parens: 'a parser -> 'a parser
+  val pair: 'a parser -> 'b parser -> ('a * 'b) parser
+  val triple: 'a parser -> 'b parser -> 'c parser -> ('a * 'b * 'c) parser
+  val properties: Properties.T parser
+end;
+
+structure ValueParse: VALUE_PARSE =
+struct
+
+structure P = OuterParse;
+type 'a parser = 'a P.parser;
+
+
+(* syntax utilities *)
+
+fun comma p = P.$$$ "," |-- P.!!! p;
+fun equal p = P.$$$ "=" |-- P.!!! p;
+fun parens p = P.$$$ "(" |-- P.!!! (p --| P.$$$ ")");
+
+
+(* tuples *)
+
+val unit = parens (Scan.succeed ());
+fun pair p1 p2 = parens (p1 -- comma p2);
+fun triple p1 p2 p3 = parens (p1 -- comma p2 -- comma p3) >> P.triple1;
+
+
+(* lists *)
+
+fun list p = parens (P.enum "," p);
+val properties = list (P.string -- equal P.string);
+
+end;
+