# HG changeset patch
# User haftmann
# Date 1256546486 -3600
# Node ID de8cc01e8d9e46b7fed2162e2514d91018a2dfa4
# Parent  d6936fd7cda89b046cb7df1edf01730c90d5eed0
legacy warnings for old-style term styles

diff -r d6936fd7cda8 -r de8cc01e8d9e src/Pure/Thy/term_style.ML
--- a/src/Pure/Thy/term_style.ML	Mon Oct 26 09:03:57 2009 +0100
+++ b/src/Pure/Thy/term_style.ML	Mon Oct 26 09:41:26 2009 +0100
@@ -54,10 +54,11 @@
       >> fold I
   || Scan.succeed I));
 
-val parse_bare = Args.context :|-- (fn ctxt => Scan.lift Args.liberal_name
+val parse_bare = Args.context :|-- (fn ctxt => (Output.legacy_feature "Old-style antiquotation style.";
+  Scan.lift Args.liberal_name
   >> (fn name => fst (Args.context_syntax "style"
        (Scan.lift (the_style (ProofContext.theory_of ctxt) name))
-          (Args.src (("style", []), Position.none)) ctxt |>> (fn f => f ctxt))));
+          (Args.src (("style", []), Position.none)) ctxt |>> (fn f => f ctxt)))));
 
 
 (* predefined styles *)
@@ -84,10 +85,13 @@
 fun style_parm_premise i = Scan.succeed (fn ctxt => fn t =>
   let
     val i_str = string_of_int i;
+    val _ = Output.legacy_feature (quote ("prem" ^ i_str)
+      ^ " term style encountered; use explicit argument syntax "
+      ^ quote ("prem " ^ i_str) ^ " instead.");
     val prems = Logic.strip_imp_prems t;
   in
     if i <= length prems then nth prems (i - 1)
-    else error ("Not enough premises for prem" ^ string_of_int i ^
+    else error ("Not enough premises for prem" ^ i_str ^
       " in propositon: " ^ Syntax.string_of_term ctxt t)
   end);