X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fcomponents%2Fgrafite%2FgrafiteAst.ml;h=2d55e8634fd73bd88b44ee9ede5ae07e158ad84e;hb=c02babd136e35568708574b9947c5d5f79f54b7c;hp=e96cf1bbcb8b9cf04b28f14c61613c9cdcaee9a3;hpb=59e3ddd15ee1983027e8929c073b06a80d523875;p=helm.git

diff --git a/matita/components/grafite/grafiteAst.ml b/matita/components/grafite/grafiteAst.ml
index e96cf1bbc..2d55e8634 100644
--- a/matita/components/grafite/grafiteAst.ml
+++ b/matita/components/grafite/grafiteAst.ml
@@ -104,7 +104,8 @@ type command =
   | NInverter of loc * string * nterm * bool list option * nterm option
   | NUnivConstraint of loc * NUri.uri * NUri.uri
   | NCopy of loc * string * NUri.uri * (NUri.uri * NUri.uri) list
-  | NCoercion of loc * string * bool * nterm * nterm * (string * nterm) * nterm
+  | NCoercion of loc * string * bool * 
+      (nterm * nterm * (string * nterm) * nterm) option
   | NQed of loc * bool
   (* ex lexicon commands *)
   | Alias of loc * alias_spec