added polyml_pp.ML: toplevel pretty printing for Poly/ML 4.x and 5.x before 5.3;

--- a/src/Pure/IsaMakefile	Sat Mar 21 19:58:45 2009 +0100
+++ b/src/Pure/IsaMakefile	Sat Mar 21 20:00:23 2009 +0100
@@ -27,10 +27,10 @@
   ML-Systems/polyml-5.0.ML ML-Systems/polyml-5.1.ML			\
   ML-Systems/polyml-experimental.ML ML-Systems/polyml.ML		\
   ML-Systems/polyml_common.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/thread_dummy.ML ML-Systems/time_limit.ML			\
-  ML-Systems/universal.ML
+  ML-Systems/polyml_old_compiler5.ML ML-Systems/polyml_pp.ML		\
+  ML-Systems/proper_int.ML ML-Systems/smlnj.ML				\
+  ML-Systems/system_shell.ML ML-Systems/thread_dummy.ML			\
+  ML-Systems/time_limit.ML ML-Systems/universal.ML
 
 RAW: $(OUT)/RAW
 

--- a/src/Pure/ML-Systems/polyml-4.1.3.ML	Sat Mar 21 19:58:45 2009 +0100
+++ b/src/Pure/ML-Systems/polyml-4.1.3.ML	Sat Mar 21 20:00:23 2009 +0100
@@ -8,6 +8,7 @@
 use "ML-Systems/thread_dummy.ML";
 use "ML-Systems/polyml_common.ML";
 use "ML-Systems/polyml_old_compiler4.ML";
+use "ML-Systems/polyml_pp.ML";
 
 val pointer_eq = Address.wordEq;
 

--- a/src/Pure/ML-Systems/polyml-4.1.4.ML	Sat Mar 21 19:58:45 2009 +0100
+++ b/src/Pure/ML-Systems/polyml-4.1.4.ML	Sat Mar 21 20:00:23 2009 +0100
@@ -8,6 +8,7 @@
 use "ML-Systems/thread_dummy.ML";
 use "ML-Systems/polyml_common.ML";
 use "ML-Systems/polyml_old_compiler4.ML";
+use "ML-Systems/polyml_pp.ML";
 
 val pointer_eq = Address.wordEq;
 

--- a/src/Pure/ML-Systems/polyml-4.2.0.ML	Sat Mar 21 19:58:45 2009 +0100
+++ b/src/Pure/ML-Systems/polyml-4.2.0.ML	Sat Mar 21 20:00:23 2009 +0100
@@ -7,6 +7,7 @@
 use "ML-Systems/thread_dummy.ML";
 use "ML-Systems/polyml_common.ML";
 use "ML-Systems/polyml_old_compiler4.ML";
+use "ML-Systems/polyml_pp.ML";
 
 val pointer_eq = Address.wordEq;
 

--- a/src/Pure/ML-Systems/polyml-5.0.ML	Sat Mar 21 19:58:45 2009 +0100
+++ b/src/Pure/ML-Systems/polyml-5.0.ML	Sat Mar 21 20:00:23 2009 +0100
@@ -7,6 +7,7 @@
 use "ML-Systems/thread_dummy.ML";
 use "ML-Systems/polyml_common.ML";
 use "ML-Systems/polyml_old_compiler5.ML";
+use "ML-Systems/polyml_pp.ML";
 
 val pointer_eq = PolyML.pointerEq;
 

--- a/src/Pure/ML-Systems/polyml-5.1.ML	Sat Mar 21 19:58:45 2009 +0100
+++ b/src/Pure/ML-Systems/polyml-5.1.ML	Sat Mar 21 20:00:23 2009 +0100
@@ -6,6 +6,7 @@
 use "ML-Systems/thread_dummy.ML";
 use "ML-Systems/polyml_common.ML";
 use "ML-Systems/polyml_old_compiler5.ML";
+use "ML-Systems/polyml_pp.ML";
 
 val pointer_eq = PolyML.pointerEq;
 

--- a/src/Pure/ML-Systems/polyml.ML	Sat Mar 21 19:58:45 2009 +0100
+++ b/src/Pure/ML-Systems/polyml.ML	Sat Mar 21 20:00:23 2009 +0100
@@ -68,3 +68,6 @@
   in use_text tune str_of_pos name_space (1, name) output verbose txt end;
 
 end;
+
+use "ML-Systems/polyml_pp.ML";
+

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/Pure/ML-Systems/polyml_pp.ML	Sat Mar 21 20:00:23 2009 +0100
@@ -0,0 +1,20 @@
+(*  Title:      Pure/ML-Systems/polyml_pp.ML
+
+Toplevel pretty printing for Poly/ML before 5.3.
+*)
+
+fun ml_pprint (print, begin_blk, brk, end_blk) =
+  let
+    fun str "" = ()
+      | str s = print s;
+    fun pprint (ML_Pretty.Block ((bg, en), prts, ind)) =
+          (str bg; begin_blk (ind, false); List.app pprint prts; end_blk (); str en)
+      | pprint (ML_Pretty.String (s, _)) = str s
+      | pprint (ML_Pretty.Break (false, wd)) = brk (wd, 0)
+      | pprint (ML_Pretty.Break (true, _)) = brk (99999, 0);
+  in pprint end;
+
+fun toplevel_pp tune str_of_pos output (_: string list) pp =
+  use_text tune str_of_pos ML_NameSpace.global (1, "pp") output false
+    ("install_pp (fn args => fn _ => fn _ => ml_pprint args o Pretty.to_ML o (" ^ pp ^ "))");
+