From: Enrico Tassi <enrico.tassi@inria.fr>
Date: Fri, 16 Jun 2006 11:47:25 +0000 (+0000)
Subject: some more on equalities
X-Git-Tag: 0.4.95@7852~1309
X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=commitdiff_plain;h=9e4b17bfecb0cc4f16e5fa36f5377f7ae9fb0911;p=helm.git

some more on equalities
---

diff --git a/components/cic/libraryObjects.ml b/components/cic/libraryObjects.ml
index df653eb9a..7a4112ad5 100644
--- a/components/cic/libraryObjects.ml
+++ b/components/cic/libraryObjects.ml
@@ -82,6 +82,12 @@ let eq_URI () =
 let is_eq_URI uri =
  List.exists (fun (eq,_,_,_,_) -> UriManager.eq eq uri) !eq_URIs_ref
 
+let is_eq_refl_URI uri =
+  let urieq = UriManager.strip_xpointer uri in
+  is_eq_URI urieq &&
+  not (UriManager.eq urieq uri)
+;;
+
 let is_eq_ind_URI uri =
  List.exists (fun (_,_,_,eq_ind,_) -> UriManager.eq eq_ind uri) !eq_URIs_ref
 
@@ -92,6 +98,10 @@ let is_trans_eq_URI uri =
 let is_sym_eq_URI uri =
  List.exists (fun (_,sym_eq,_,_,_) -> UriManager.eq sym_eq uri) !eq_URIs_ref
 
+let eq_refl_URI ~eq:uri =
+  let uri = UriManager.strip_xpointer uri in
+  UriManager.uri_of_string (UriManager.string_of_uri uri ^ "#xpointer(1/1/1)")
+ 
 let sym_eq_URI ~eq:uri =
  try
   let _,x,_,_,_ = List.find (fun eq,_,_,_,_ -> UriManager.eq eq uri) !eq_URIs_ref in x
diff --git a/components/cic/libraryObjects.mli b/components/cic/libraryObjects.mli
index 7c31bf2bf..9dfe54902 100644
--- a/components/cic/libraryObjects.mli
+++ b/components/cic/libraryObjects.mli
@@ -29,6 +29,7 @@ val reset_defaults : unit -> unit
 val eq_URI : unit -> UriManager.uri option
 
 val is_eq_URI : UriManager.uri -> bool
+val is_eq_refl_URI : UriManager.uri -> bool
 val is_eq_ind_URI : UriManager.uri -> bool
 val is_eq_ind_r_URI : UriManager.uri -> bool
 val is_trans_eq_URI : UriManager.uri -> bool
@@ -36,6 +37,7 @@ val is_sym_eq_URI : UriManager.uri -> bool
 
 exception NotRecognized of string;;
 
+val eq_refl_URI : eq:UriManager.uri -> UriManager.uri
 val eq_ind_URI : eq:UriManager.uri -> UriManager.uri
 val eq_ind_r_URI : eq:UriManager.uri -> UriManager.uri
 val trans_eq_URI : eq:UriManager.uri -> UriManager.uri