# HG changeset patch
# User wenzelm
# Date 1145996630 -7200
# Node ID d75570e8aa976e417540f9dd500a21246401c3ce
# Parent  29bc35832a779a341fecfad53aa1b2a467f47f63
unlocalize_mixfix: fallback on NoSyn;

diff -r 29bc35832a77 -r d75570e8aa97 src/Pure/Syntax/mixfix.ML
--- a/src/Pure/Syntax/mixfix.ML	Tue Apr 25 22:23:41 2006 +0200
+++ b/src/Pure/Syntax/mixfix.ML	Tue Apr 25 22:23:50 2006 +0200
@@ -143,7 +143,9 @@
   | map_mixfix _ Structure = Structure
   | map_mixfix _ _ = raise Fail ("map_mixfix: illegal occurrence of unnamed infix");
 
-val unlocalize_mixfix = map_mixfix SynExt.unlocalize_mfix;
+fun unlocalize_mixfix mx =
+  let val mx' = map_mixfix SynExt.unlocalize_mfix mx
+  in if mx = mx' then NoSyn else mx' end;
 
 fun mixfix_args NoSyn = 0
   | mixfix_args (Mixfix (sy, _, _)) = SynExt.mfix_args sy