]> matita.cs.unibo.it Git - helm.git/blobdiff - helm/ocaml/cic_transformations/content2pres.ml
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[helm.git] / helm / ocaml / cic_transformations / content2pres.ml
index da20856d2694a5152b8561d5b5a56751356d92fe..c0cdc5c0f0f0c289cc07afd85c1127161b25d2d8 100644 (file)
 (*                                                                         *)
 (***************************************************************************)
 
+let p_mtr a b = Mpresentation.Mtr(a,b)
+let p_mtd a b = Mpresentation.Mtd(a,b)
+let p_mtable a b = Mpresentation.Mtable(a,b)
+let p_mtext a b = Mpresentation.Mtext(a,b)
+let p_mi a b = Mpresentation.Mi(a,b)
+let p_mo a b = Mpresentation.Mo(a,b)
+let p_mrow a b = Mpresentation.Mrow(a,b)
+let p_mphantom a b = Mpresentation.Mphantom(a,b)
+
+
 let rec split n l =
   if n = 0 then [],l
   else let l1,l2 = 
@@ -157,29 +167,34 @@ let make_concl ?(attrs=[]) verb concl =
 let make_args_for_apply term2pres args =
  let module Con = Content in
  let module P = Mpresentation in
- let rec make_arg_for_apply is_first arg row = 
-   (match arg with 
+ let make_arg_for_apply is_first arg row = 
+  let res =
+   match arg with 
       Con.Aux n -> assert false
     | Con.Premise prem -> 
         let name = 
           (match prem.Con.premise_binder with
              None -> "previous"
            | Some s -> s) in
-        P.smallskip::P.Mi([],name)::row
+        P.Mi([],name)::row
     | Con.Lemma lemma -> 
-         P.smallskip::P.Mi([],lemma.Con.lemma_name)::row 
+         P.Mi([],lemma.Con.lemma_name)::row 
     | Con.Term t -> 
         if is_first then
           (term2pres t)::row
-        else P.smallskip::P.Mi([],"_")::row
+        else P.Mi([],"_")::row
     | Con.ArgProof _ 
     | Con.ArgMethod _ -> 
-       P.smallskip::P.Mi([],"_")::row) in
- match args with 
-   hd::tl -> 
-     make_arg_for_apply true hd 
-       (List.fold_right (make_arg_for_apply false) tl [])
- | _ -> assert false;;
+       P.Mi([],"_")::row
+  in
+   if is_first then res else P.smallskip::res
+ in
+  match args with 
+    hd::tl -> 
+      make_arg_for_apply true hd 
+        (List.fold_right (make_arg_for_apply false) tl [])
+  | _ -> assert false
+;;
 
 let rec justification term2pres p = 
   let module Con = Content in
@@ -206,44 +221,68 @@ and proof2pres term2pres p =
            | `Hypothesis _ -> true
            | _ -> false) in
         ((List.filter is_decl p.Con.proof_context) != []) in 
+      let omit_conclusion = (not indent) && (p.Con.proof_context != []) in
       let concl = 
         (match p.Con.proof_conclude.Con.conclude_conclusion with
            None -> None
          | Some t -> Some (term2pres t)) in
       let body =
-          let presconclude = conclude2pres p.Con.proof_conclude indent in
+          let presconclude = 
+            conclude2pres p.Con.proof_conclude indent omit_conclusion in
           let presacontext = 
             acontext2pres p.Con.proof_apply_context presconclude indent in
           context2pres p.Con.proof_context presacontext in
       match p.Con.proof_name with
         None -> body
       | Some name ->
-          let ac = 
-        (match concl with
-               None -> P.Mtext([],"NO PROOF!!!")
-             | Some c -> c) in 
           let action = 
-            P.Maction([None,"actiontype","toggle" ;
-                       None,"selection","1"],
-              [(make_concl "proof of" ac);
-                body]) in
+           match concl with
+              None -> body
+(*
+               P.Maction
+                 ([None,"actiontype","toggle" ; None,"selection","1"],
+                  [P.Mtext [] "proof" ; body])
+*)
+            | Some ac ->
+               P.Maction
+                 ([None,"actiontype","toggle" ; None,"selection","1"],
+                  [(make_concl ~attrs:[Some "helm", "xref", p.Con.proof_id]
+                     "proof of" ac); body])
+          in
           P.Mtable ([None,"align","baseline 1"; None,"equalrows","false";
-              None,"columnalign","left";Some "helm", "xref", p.Con.proof_id],
+              None,"columnalign","left"],
             [P.Mtr ([],[P.Mtd ([],P.Mfenced([],[P.Mtext ([],name)]))]);
              P.Mtr ([],[P.Mtd ([], P.indented action)])])
+(*
+          P.Mtable ([None,"align","baseline 1"; None,"equalrows","false";
+              None,"columnalign","left";Some "helm", "xref", p.Con.proof_id],
+            [P.Mtr ([],[P.Mtd ([],P.Mfenced([],[P.Mtext ([],name)]))]);
+             P.Mtr ([],[P.Mtd ([], P.indented action)])]) *)
 
   and context2pres c continuation =
     (* we generate a subtable for each context element, for selection
-       purposes *)
+       purposes 
+       The table generated by the head-element does not have an xref;
+       the whole context-proof is already selectable *)
     let module P = Mpresentation in
-    List.fold_right
-      (fun ce continuation ->
-         let xref = get_xref ce in
+    match c with
+      [] -> continuation
+    | hd::tl -> 
+        let continuation' =
+          List.fold_right
+            (fun ce continuation ->
+              let xref = get_xref ce in
+              P.Mtable([None,"align","baseline 1"; None,"equalrows","false";
+               None,"columnalign","left"; Some "helm", "xref", xref ],
+                [P.Mtr([Some "helm", "xref", "ce_"^xref],[P.Mtd ([],ce2pres ce)]);
+                 P.Mtr([],[P.Mtd ([], continuation)])])) tl continuation in
+         let hd_xref= get_xref hd in
          P.Mtable([None,"align","baseline 1"; None,"equalrows","false";
-          None,"columnalign","left"; Some "helm", "xref", xref ],
-           [P.Mtr([Some "helm", "xref", "ce_"^xref],[P.Mtd ([],ce2pres ce)]);
-            P.Mtr([],[P.Mtd ([], continuation)])])) c continuation
-
+           None,"columnalign","left"],
+             [P.Mtr([Some "helm", "xref", "ce_"^hd_xref],
+               [P.Mtd ([],ce2pres hd)]);
+             P.Mtr([],[P.Mtd ([], continuation')])])
+         
   and ce2pres =
     let module P = Mpresentation in
     let module Con = Content in
@@ -267,14 +306,15 @@ and proof2pres term2pres p =
                 P.Mrow ([],
                   [P.Mtext([None,"mathcolor","Red"],"Suppose");
                    P.Mspace([None,"width","0.1cm"]);
-                   P.Mtext([],"(");
+                   P.Mo([],"(");
                    P.Mi ([],s);
-                   P.Mtext([],")");
+                   P.Mo([],")");
                    P.Mspace([None,"width","0.1cm"]);
                    ty])
             | None -> 
                 prerr_endline "NO NAME!!"; assert false) 
-      | `Proof p -> proof2pres p
+      | `Proof p -> 
+           proof2pres p 
       | `Definition d -> 
            (match d.Con.def_name with
               Some s ->
@@ -304,12 +344,41 @@ and proof2pres term2pres p =
            [P.Mtr([Some "helm","xref","ace_"^p.Con.proof_id],[P.Mtd ([],hd)]);
             P.Mtr([],[P.Mtd ([], continuation)])])) ac continuation 
 
-  and conclude2pres conclude indent =
+  and conclude2pres conclude indent omit_conclusion =
+    let module Con = Content in
     let module P = Mpresentation in
-    if indent then
-      P.indented (conclude_aux conclude)
+    let tconclude_body = 
+      match conclude.Con.conclude_conclusion with
+        Some t when
+         not omit_conclusion or
+         (* CSC: I ignore the omit_conclusion flag in this case.   *)
+         (* CSC: Is this the correct behaviour? In the stylesheets *)
+         (* CSC: we simply generated nothing (i.e. the output type *)
+         (* CSC: of the function should become an option.          *)
+         conclude.Con.conclude_method = "BU_Conversion" ->
+          let concl = (term2pres t) in 
+          if conclude.Con.conclude_method = "BU_Conversion" then
+            make_concl "that is equivalent to" concl
+          else if conclude.Con.conclude_method = "FalseInd" then
+           (* false ind is in charge to add the conclusion *)
+           falseind conclude
+          else  
+            let conclude_body = conclude_aux conclude in
+            let ann_concl = 
+              if conclude.Con.conclude_method = "TD_Conversion" then
+                 make_concl "that is equivalent to" concl 
+              else make_concl "we conclude" concl in
+            P.Mtable ([None,"align","baseline 1"; None,"equalrows","false";
+              None,"columnalign","left"],
+                [P.Mtr ([],[P.Mtd ([],conclude_body)]);
+                 P.Mtr ([],[P.Mtd ([],ann_concl)])])
+      | _ -> conclude_aux conclude in
+    if indent then 
+      P.indented (P.Mrow ([Some "helm", "xref", conclude.Con.conclude_id],
+                    [tconclude_body]))
     else 
-      conclude_aux conclude
+      P.Mrow ([Some "helm", "xref", conclude.Con.conclude_id],[tconclude_body])
+
 
   and conclude_aux conclude =
     let module Con = Content in
@@ -328,30 +397,31 @@ and proof2pres term2pres p =
            None -> P.Mtext([],"NO SYNTH!!!")
          | Some c -> (term2pres c)) in
       P.Mtable 
-        ([None,"align","baseline 1"; None,"equalrows","false"; None,"columnalign","left"; Some "helm", "xref", conclude.Con.conclude_id],
+        ([None,"align","baseline 1"; None,"equalrows","false"; None,"columnalign","left"],
         [P.Mtr([],[P.Mtd([],make_concl "we must prove" expected)]);
          P.Mtr([],[P.Mtd([],make_concl "or equivalently" synth)]);
          P.Mtr([],[P.Mtd([],proof2pres subproof)])])
     else if conclude.Con.conclude_method = "BU_Conversion" then
-      let conclusion = 
-      (match conclude.Con.conclude_conclusion with 
-         None -> P.Mtext([],"NO Conclusion!!!")
-       | Some c -> term2pres c) in
-      make_concl 
-        ~attrs:[Some "helm", "xref", conclude.Con.conclude_id]
-          "that is equivalent to" conclusion
+      assert false
     else if conclude.Con.conclude_method = "Exact" then
-      let conclusion = 
-        (match conclude.Con.conclude_conclusion with 
-           None -> P.Mtext([],"NO Conclusion!!!")
-         | Some c -> term2pres c) in
       let arg = 
         (match conclude.Con.conclude_args with 
            [Con.Term t] -> term2pres t
          | _ -> assert false) in
-      make_row ~attrs:[Some "helm", "xref", conclude.Con.conclude_id]
-        [arg;P.Mspace([None,"width","0.1cm"]);P.Mtext([],"proves")] conclusion
+      (match conclude.Con.conclude_conclusion with 
+         None ->
+          p_mrow []
+           [p_mtext [None, "mathcolor", "red"] "Consider" ; P.smallskip; arg]
+       | Some c -> let conclusion = term2pres c in
+          make_row 
+            [arg; P.Mspace([None,"width","0.1cm"]);P.Mtext([],"proves")]
+            conclusion
+       )
     else if conclude.Con.conclude_method = "Intros+LetTac" then
+      (match conclude.Con.conclude_args with
+         [Con.ArgProof p] -> proof2pres p
+       | _ -> assert false)
+(* OLD CODE 
       let conclusion = 
       (match conclude.Con.conclude_conclusion with 
          None -> P.Mtext([],"NO Conclusion!!!")
@@ -360,14 +430,22 @@ and proof2pres term2pres p =
          [Con.ArgProof p] -> 
            P.Mtable 
             ([None,"align","baseline 1"; None,"equalrows","false";
-              None,"columnalign","left"; 
-              Some "helm", "xref", conclude.Con.conclude_id],
+              None,"columnalign","left"],
               [P.Mtr([],[P.Mtd([],proof2pres p)]);
                P.Mtr([],[P.Mtd([],
-                (make_concl "we proved *" conclusion))])]);
+                (make_concl "we proved 1" conclusion))])]);
        | _ -> assert false)
+*)
+    else if (conclude.Con.conclude_method = "Case") then
+      case conclude
     else if (conclude.Con.conclude_method = "ByInduction") then
       byinduction conclude
+    else if (conclude.Con.conclude_method = "Exists") then
+      exists conclude
+    else if (conclude.Con.conclude_method = "AndInd") then
+      andind conclude
+    else if (conclude.Con.conclude_method = "FalseInd") then
+      falseind conclude
     else if (conclude.Con.conclude_method = "Rewrite") then
       let justif = 
         (match (List.nth conclude.Con.conclude_args 6) with
@@ -380,42 +458,26 @@ and proof2pres term2pres p =
       let term2 = 
         (match List.nth conclude.Con.conclude_args 5 with
            Con.Term t -> term2pres t
-         | _ -> assert false) in  
-      let conclusion = 
-        (match conclude.Con.conclude_conclusion with 
-           None -> P.Mtext([],"NO Conclusion!!!")
-         | Some c -> term2pres c) in
+         | _ -> assert false) in
       P.Mtable ([None,"align","baseline 1";None,"equalrows","false";
-            None,"columnalign","left"; 
-            Some "helm", "xref", conclude.Con.conclude_id],
-             [P.Mtr ([],[P.Mtd ([],P.Mrow([],[
-               P.Mtext([None,"mathcolor","Red"],"rewrite");
-               P.Mspace([None,"width","0.1cm"]);term1;
-               P.Mspace([None,"width","0.1cm"]);
-               P.Mtext([None,"mathcolor","Red"],"with");
-               P.Mspace([None,"width","0.1cm"]);term2]))]);
-              P.Mtr ([],[P.Mtd ([],P.indented justif)]);
-              P.Mtr ([],[P.Mtd ([],make_concl "we proved" conclusion)])])
+        None,"columnalign","left"], 
+         [P.Mtr ([],[P.Mtd ([],P.Mrow([],[
+          P.Mtext([None,"mathcolor","Red"],"rewrite");
+          P.Mspace([None,"width","0.1cm"]);term1;
+          P.Mspace([None,"width","0.1cm"]);
+          P.Mtext([None,"mathcolor","Red"],"with");
+          P.Mspace([None,"width","0.1cm"]);term2]))]);
+          P.Mtr ([],[P.Mtd ([],P.indented justif)])]);
     else if conclude.Con.conclude_method = "Apply" then
       let pres_args = 
-        make_args_for_apply term2pres conclude.Con.conclude_args in 
-      let by = 
-         P.Mrow([],
-           P.Mtext([None,"mathcolor","Red"],"by")::P.Mspace([None,"width","0.1cm"])::
-           P.Mo([],"(")::pres_args@[P.Mo([],")")]) in 
-      match conclude.Con.conclude_conclusion with
-        None -> P.Mrow([],[P.Mtext([],"QUA");by])
-      | Some t ->
-         let concl = (term2pres t) in
-         let ann_concl = make_concl "we proved" concl in
-         P.Mtable ([None,"align","baseline 1"; None,"equalrows","false";
-            None,"columnalign","left"; 
-            Some "helm", "xref", conclude.Con.conclude_id],
-             [P.Mtr ([],[P.Mtd ([],by)]);
-              P.Mtr ([],[P.Mtd ([],ann_concl)])])
-    else let body =
+        make_args_for_apply term2pres conclude.Con.conclude_args in
+      P.Mrow([],
+        P.Mtext([None,"mathcolor","Red"],"by")::
+        P.Mspace([None,"width","0.1cm"])::
+        P.Mo([],"(")::pres_args@[P.Mo([],")")])
+    else 
       P.Mtable 
-        ([None,"align","baseline 1"; None,"equalrows","false"; None,"columnalign","left"; Some "helm", "xref", conclude.Con.conclude_id],
+        ([None,"align","baseline 1"; None,"equalrows","false"; None,"columnalign","left"],
          [P.Mtr ([],[P.Mtd ([],P.Mtext([],"Apply method" ^ conclude.Con.conclude_method ^ " to"))]);
           P.Mtr ([],
            [P.Mtd ([], 
@@ -423,16 +485,7 @@ and proof2pres term2pres p =
                (P.Mtable 
                  ([None,"align","baseline 1"; None,"equalrows","false";
                    None,"columnalign","left"],
-                  args2pres conclude.Con.conclude_args))))])]) in
-     match conclude.Con.conclude_conclusion with
-       None -> body
-     | Some t ->
-         let concl = (term2pres t) in
-         let ann_concl = make_concl "we proved" concl in
-         P.Mtable ([None,"align","baseline 1"; None,"equalrows","false";
-            None,"columnalign","left"],
-             [P.Mtr ([],[P.Mtd ([],body)]);
-              P.Mtr ([],[P.Mtd ([],ann_concl)])])
+                  args2pres conclude.Con.conclude_args))))])]) 
 
   and args2pres l =
     let module P = Mpresentation in
@@ -456,6 +509,44 @@ and proof2pres term2pres p =
       | Con.ArgMethod s -> 
          P.Mtext ([],"method") 
  
+   and case conclude =
+     let module P = Mpresentation in
+     let module Con = Content in
+     let proof_conclusion = 
+       (match conclude.Con.conclude_conclusion with
+          None -> P.Mtext([],"No conclusion???")
+        | Some t -> term2pres t) in
+     let arg,args_for_cases = 
+       (match conclude.Con.conclude_args with
+           Con.Aux(_)::Con.Aux(_)::Con.Term(_)::arg::tl ->
+             arg,tl
+         | _ -> assert false) in
+     let case_on =
+       let case_arg = 
+         (match arg with
+            Con.Aux n -> 
+              P.Mtext ([],"an aux???")
+           | Con.Premise prem ->
+              (match prem.Con.premise_binder with
+                 None -> P.Mtext ([],"the previous result")
+               | Some n -> P.Mi([],n))
+           | Con.Lemma lemma -> P.Mi([],lemma.Con.lemma_name)
+           | Con.Term t -> 
+               term2pres t
+           | Con.ArgProof p ->
+               P.Mtext ([],"a proof???")
+           | Con.ArgMethod s -> 
+               P.Mtext ([],"a method???")) in
+        (make_concl "we proceede by cases on" case_arg) in
+     let to_prove =
+        (make_concl "to prove" proof_conclusion) in
+     P.Mtable 
+       ([None,"align","baseline 1"; None,"equalrows","false"; 
+         None,"columnalign","left"],
+          P.Mtr ([],[P.Mtd ([],case_on)])::
+          P.Mtr ([],[P.Mtd ([],to_prove)])::
+          (make_cases args_for_cases))
+
    and byinduction conclude =
      let module P = Mpresentation in
      let module Con = Content in
@@ -489,15 +580,13 @@ and proof2pres term2pres p =
         (make_concl "we proceede by induction on" arg) in
      let to_prove =
         (make_concl "to prove" proof_conclusion) in
-     let we_proved = 
-        (make_concl "we proved" proof_conclusion) in
      P.Mtable 
-       ([None,"align","baseline 1"; None,"equalrows","false"; None,"columnalign","left"],
+       ([None,"align","baseline 1"; None,"equalrows","false"; 
+         None,"columnalign","left"],
           P.Mtr ([],[P.Mtd ([],induction_on)])::
           P.Mtr ([],[P.Mtd ([],to_prove)])::
-          (make_cases args_for_cases) @
-          [P.Mtr ([],[P.Mtd ([],we_proved)])]) 
-    
+          (make_cases args_for_cases))
+
     and make_cases args_for_cases =
     let module P = Mpresentation in
     List.map 
@@ -561,9 +650,9 @@ and proof2pres term2pres p =
                           None -> "no name"
                         | Some s -> s) in
                      P.indented (P.Mrow ([],
-                       [P.Mtext([],"(");
+                       [P.Mo([],"(");
                         P.Mi ([],name);
-                        P.Mtext([],")");
+                        P.Mo([],")");
                         P.Mspace([None,"width","0.1cm"]);
                         term2pres h.Con.dec_type]))
                    | _ -> assert false in
@@ -574,16 +663,159 @@ and proof2pres term2pres p =
                text::hyps) in          
           (* let acontext = 
                acontext2pres_old p.Con.proof_apply_context true in *)
-          let body = conclude2pres p.Con.proof_conclude true in
+          let body = conclude2pres p.Con.proof_conclude true false in
           let presacontext = 
+           let acontext_id =
+            match p.Con.proof_apply_context with
+               [] -> p.Con.proof_conclude.Con.conclude_id
+             | {Con.proof_id = id}::_ -> id
+           in
             P.Maction([None,"actiontype","toggle" ; None,"selection","1"],
-              [P.indented (P.Mtext([None,"mathcolor","Red"],"Proof"));
+              [P.indented
+               (P.Mtext
+                 ([None,"mathcolor","Red" ;
+                   Some "helm", "xref", acontext_id],"Proof")) ;
                acontext2pres p.Con.proof_apply_context body true]) in
           P.Mtable ([None,"align","baseline 1"; None,"equalrows","false";
              None,"columnalign","left"],
              pattern::asubconcl::induction_hypothesis@
               [P.Mtr([],[P.Mtd([],presacontext)])])
-      | _ -> assert false in
+       | _ -> assert false 
+
+     and falseind conclude =
+       let module P = Mpresentation in
+       let module Con = Content in
+       let proof_conclusion = 
+         (match conclude.Con.conclude_conclusion with
+            None -> P.Mtext([],"No conclusion???")
+          | Some t -> term2pres t) in
+       let case_arg = 
+         (match conclude.Con.conclude_args with
+             [Con.Aux(n);_;case_arg] -> case_arg
+           | _ -> assert false;
+             (* 
+             List.map (ContentPp.parg 0) conclude.Con.conclude_args;
+             assert false *)) in
+       let arg = 
+         (match case_arg with
+             Con.Aux n -> assert false
+           | Con.Premise prem ->
+              (match prem.Con.premise_binder with
+                 None -> [P.Mtext([],"Contradiction, hence")]
+               | Some n -> 
+                  [P.Mi([],n);P.smallskip;P.Mtext([],"is contradictory, hence")])
+           | Con.Lemma lemma -> 
+               [P.Mi([],lemma.Con.lemma_name);P.smallskip;P.Mtext([],"is contradictory, hence")]
+           | _ -> assert false) in
+            (* let body = proof2pres {proof with Con.proof_context = tl} in *)
+       make_row arg proof_conclusion
+
+     and andind conclude =
+       let module P = Mpresentation in
+       let module Con = Content in
+       let proof_conclusion = 
+         (match conclude.Con.conclude_conclusion with
+            None -> P.Mtext([],"No conclusion???")
+          | Some t -> term2pres t) in
+       let proof,case_arg = 
+         (match conclude.Con.conclude_args with
+             [Con.Aux(n);_;Con.ArgProof proof;case_arg] -> proof,case_arg
+           | _ -> assert false;
+             (* 
+             List.map (ContentPp.parg 0) conclude.Con.conclude_args;
+             assert false *)) in
+       let arg = 
+         (match case_arg with
+             Con.Aux n -> assert false
+           | Con.Premise prem ->
+              (match prem.Con.premise_binder with
+                 None -> []
+               | Some n -> [P.Mtext([],"by");P.smallskip;P.Mi([],n)])
+           | Con.Lemma lemma -> 
+               [P.Mtext([],"by");P.smallskip;P.Mi([],lemma.Con.lemma_name)]
+           | _ -> assert false) in
+       match proof.Con.proof_context with
+         `Hypothesis hyp1::`Hypothesis hyp2::tl ->
+            let get_name hyp =
+              (match hyp.Con.dec_name with
+                None -> "_"
+              | Some s -> s) in
+            let preshyp1 = 
+              P.Mrow ([],
+               [P.Mtext([],"(");
+                P.Mi([],get_name hyp1);
+                P.Mtext([],")");
+                P.smallskip;
+                term2pres hyp1.Con.dec_type]) in
+            let preshyp2 = 
+              P.Mrow ([],
+               [P.Mtext([],"(");
+                P.Mi([],get_name hyp2);
+                P.Mtext([],")");
+                P.smallskip;
+                term2pres hyp2.Con.dec_type]) in
+            (* let body = proof2pres {proof with Con.proof_context = tl} in *)
+            let body = conclude2pres proof.Con.proof_conclude false true in
+            let presacontext = 
+              acontext2pres proof.Con.proof_apply_context body false in
+            P.Mtable 
+              ([None,"align","baseline 1"; None,"equalrows","false"; 
+                None,"columnalign","left"],
+               [P.Mtr ([],[P.Mtd ([],
+                 P.Mrow([],arg@[P.smallskip;P.Mtext([],"we have")]))]);
+                P.Mtr ([],[P.Mtd ([],preshyp1)]);
+                P.Mtr ([],[P.Mtd ([],P.Mtext([],"and"))]);
+                P.Mtr ([],[P.Mtd ([],preshyp2)]);
+                P.Mtr ([],[P.Mtd ([],presacontext)])]);
+         | _ -> assert false
+
+     and exists conclude =
+       let module P = Mpresentation in
+       let module Con = Content in
+       let proof_conclusion = 
+         (match conclude.Con.conclude_conclusion with
+            None -> P.Mtext([],"No conclusion???")
+          | Some t -> term2pres t) in
+       let proof = 
+         (match conclude.Con.conclude_args with
+             [Con.Aux(n);_;Con.ArgProof proof;_] -> proof
+           | _ -> assert false;
+             (* 
+             List.map (ContentPp.parg 0) conclude.Con.conclude_args;
+             assert false *)) in
+       match proof.Con.proof_context with
+           `Declaration decl::`Hypothesis hyp::tl
+         | `Hypothesis decl::`Hypothesis hyp::tl ->
+           let get_name decl =
+             (match decl.Con.dec_name with
+                None -> "_"
+              | Some s -> s) in
+           let presdecl = 
+             P.Mrow ([],
+               [P.Mtext([None,"mathcolor","Red"],"let");
+                P.smallskip;
+                P.Mi([],get_name decl);
+                P.Mtext([],":"); term2pres decl.Con.dec_type]) in
+           let suchthat =
+             P.Mrow ([],
+               [P.Mtext([None,"mathcolor","Red"],"such that");
+                P.smallskip;
+                P.Mtext([],"(");
+                P.Mi([],get_name hyp);
+                P.Mtext([],")");
+                P.smallskip;
+                term2pres hyp.Con.dec_type]) in
+            (* let body = proof2pres {proof with Con.proof_context = tl} in *)
+            let body = conclude2pres proof.Con.proof_conclude false true in
+            let presacontext = 
+              acontext2pres proof.Con.proof_apply_context body false in
+            P.Mtable 
+              ([None,"align","baseline 1"; None,"equalrows","false"; 
+                None,"columnalign","left"],
+               [P.Mtr ([],[P.Mtd ([],presdecl)]);
+                P.Mtr ([],[P.Mtd ([],suchthat)]);
+                P.Mtr ([],[P.Mtd ([],presacontext)])]);
+         | _ -> assert false in
 
 proof2pres p
 ;;
@@ -595,103 +827,103 @@ let content2pres term2pres (id,params,metasenv,obj) =
  let module P = Mpresentation in
   match obj with
      `Def (K.Const,thesis,`Proof p) ->
-       P.Mtable
+       p_mtable
         [None,"align","baseline 1";
          None,"equalrows","false";
          None,"columnalign","left";
          None,"helm:xref","id"]
-        ([P.Mtr []
-           [P.Mtd []
-            (P.Mrow []
-             [P.Mtext []
+        ([p_mtr []
+           [p_mtd []
+            (p_mrow []
+             [p_mtext []
                ("UNFINISHED PROOF" ^ id ^"(" ^
                  String.concat " ; " (List.map UriManager.string_of_uri params)^
                 ")")])] ;
-         P.Mtr []
-          [P.Mtd []
-            (P.Mrow []
-              [P.Mtext [] "THESIS:"])] ;
-         P.Mtr []
-          [P.Mtd []
-            (P.Mrow []
-              [P.Mphantom []
-                (P.Mtext [] "__") ;
+         p_mtr []
+          [p_mtd []
+            (p_mrow []
+              [p_mtext [] "THESIS:"])] ;
+         p_mtr []
+          [p_mtd []
+            (p_mrow []
+              [p_mphantom []
+                (p_mtext [] "__") ;
               term2pres thesis])]] @
          (match metasenv with
              None -> []
            | Some metasenv' ->
-              [P.Mtr []
-                [P.Mtd []
+              [p_mtr []
+                [p_mtd []
                   (* Conjectures are in their own table to make *)
                   (* diffing the DOM trees easier.              *)
-                  (P.Mtable
+                  (p_mtable
                     [None,"align","baseline 1";
                      None,"equalrows","false";
                      None,"columnalign","left"]
-                   ((P.Mtr []
-                      [P.Mtd []
-                       (P.Mrow []
-                         [P.Mtext [] "CONJECTURES:"])])::
+                   ((p_mtr []
+                      [p_mtd []
+                       (p_mrow []
+                         [p_mtext [] "CONJECTURES:"])])::
                     List.map
                      (function
                        (id,n,context,ty) ->
-                         P.Mtr []
-                          [P.Mtd []
-                           (P.Mrow []
+                         p_mtr []
+                          [p_mtd []
+                           (p_mrow [Some "helm", "xref", id]
                              (List.map
                                (function
-                                   (_,None) ->
-                                     P.Mrow []
-                                      [ P.Mi [] "_" ;
-                                        P.Mo [] ":?" ;
-                                        P.Mi [] "_"]
-                                 | (_,Some (`Declaration d))
-                                 | (_,Some (`Hypothesis d)) ->
+                                   None ->
+                                     p_mrow []
+                                      [ p_mi [] "_" ;
+                                        p_mo [] ":?" ;
+                                        p_mi [] "_"]
+                                 | Some (`Declaration d)
+                                 | Some (`Hypothesis d) ->
                                     let
                                      { K.dec_name = dec_name ;
                                        K.dec_type = ty } = d
                                      in
-                                      P.Mrow []
-                                       [ P.Mi []
+                                      p_mrow []
+                                       [ p_mi []
                                           (match dec_name with
                                               None -> "_"
                                             | Some n -> n) ;
-                                         P.Mo [] ":" ;
+                                         p_mo [] ":" ;
                                          term2pres ty]
-                                 | (_,Some (`Definition d)) ->
+                                 | Some (`Definition d) ->
                                     let
                                      { K.def_name = def_name ;
                                        K.def_term = bo } = d
                                      in
-                                      P.Mrow []
-                                       [ P.Mi []
+                                      p_mrow []
+                                       [ p_mi []
                                           (match def_name with
                                               None -> "_"
                                             | Some n -> n) ;
-                                         P.Mo [] ":=" ;
+                                         p_mo [] ":=" ;
                                          term2pres bo]
-                                 | (_,Some (`Proof p)) ->
+                                 | Some (`Proof p) ->
                                     let proof_name = p.K.proof_name in
-                                     P.Mrow []
-                                      [ P.Mi []
+                                     p_mrow []
+                                      [ p_mi []
                                          (match proof_name with
                                              None -> "_"
                                            | Some n -> n) ;
-                                        P.Mo [] ":=" ;
+                                        p_mo [] ":=" ;
                                         proof2pres term2pres p]
-                               ) context @
-                             [ P.Mo [] "|-" ] @
-                             [ P.Mi [] (string_of_int n) ;
-                               P.Mo [] ":" ;
+                               ) (List.rev context) @
+                             [ p_mo [] "|-" ] @
+                             [ p_mi [] (string_of_int n) ;
+                               p_mo [] ":" ;
                                term2pres ty ]
                            ))
                           ]
                      ) metasenv'
                   ))]]
          )  @
-        [P.Mtr []
-          [P.Mtd []
-            (P.Mrow []
+        [p_mtr []
+          [p_mtd []
+            (p_mrow []
               [proof2pres term2pres p])]])
    | _ -> raise ToDo
 ;;
@@ -702,3 +934,4 @@ let content2pres ~ids_to_inner_sorts =
    (Cexpr2pres.cexpr2pres_charcount 
     (Content_expressions.acic2cexpr ids_to_inner_sorts p)))
 ;;
+