--- a/ProgTutorial/antiquote_setup.ML	Thu Aug 20 22:30:20 2009 +0200
+++ b/ProgTutorial/antiquote_setup.ML	Thu Aug 20 23:30:51 2009 +0200
@@ -87,6 +87,7 @@
 
 val single_arg = Scan.lift (Args.name)
 val two_args   = Scan.lift (Args.name -- Args.name)
+val test = Scan.lift (Args.name -- Args.name -- Scan.option (Args.$$$ "with"  |-- Args.name))
 
 val _ = ThyOutput.antiquotation "ML" parser_ml output_ml
 val _ = ThyOutput.antiquotation "ML_ind" parser_ml_ind output_ml_ind
@@ -98,6 +99,19 @@
 val _ = ThyOutput.antiquotation "ML_response_fake" two_args output_response_fake
 val _ = ThyOutput.antiquotation "ML_response_fake_both" two_args ouput_response_fake_both
 
+(* FIXME: experimental *)
+fun ml_eq (lhs, pat, eq) =
+  implode ["val true = ((", eq, ") (", lhs, ",", pat, "))"] 
+
+fun output_response_eq {context = ctxt, ...} ((lhs, pat), eq) = 
+    (case eq of 
+       NONE => eval_fn ctxt (ml_pat (lhs, pat))
+     | SOME e => eval_fn ctxt (ml_eq (lhs, pat, e));
+     output ((prefix_lines "" lhs) @ (prefix_lines "> " pat)))
+
+val _ = ThyOutput.antiquotation "ML_response_eq" test output_response_eq
+
+(* checks whether a file exists in the Isabelle distribution *)
 fun href_link txt =
 let 
   val raw = Symbol.encode_raw
@@ -106,13 +120,11 @@
  implode [raw "\\href{", raw path, raw txt, raw "}{", txt, raw "}"]
 end 
 
-(* checks whether a file exists in the Isabelle distribution *)
 fun check_file_exists _ txt =
   (if File.exists (Path.append (Path.explode ("~~/src")) (Path.explode txt)) 
    then output [href_link txt]
    else error (implode ["Source file ", quote txt, " does not exist."]))
 
-
 val _ = ThyOutput.antiquotation "ML_file" single_arg check_file_exists