constructor accepts the arguments of the constructor...

[helm.git] / helm / software / components / ng_tactics / nTactics.ml

diff --git a/helm/software/components/ng_tactics/nTactics.ml b/helm/software/components/ng_tactics/nTactics.ml
index 0d06da71d0d7358dd863c68c210125a63fe2f252..b3f05293fac8e03795ecb629fe8f7f67ec005246 100644 (file)
--- a/helm/software/components/ng_tactics/nTactics.ml
+++ b/helm/software/components/ng_tactics/nTactics.ml
@@ -434,7 +434,10 @@ let letin_tac ~where ~what:(_,_,w) name =
  ]
 ;;
 
-let apply_tac (s,n,t) = exact_tac (s,n,Ast.Appl [t; Ast.Implicit `Vector]);;
+let apply_tac (s,n,t) = 
+  let t = Ast.Appl [t; Ast.Implicit `Vector] in
+  exact_tac (s,n,t)
+;;
 
 type indtyinfo = {
         rightno: int;
@@ -468,6 +471,7 @@ let elim_tac ~what:(txt,len,what) ~where =
   let compute_goal_sort_tac = distribute_tac (fun status goal ->
     let goalty = get_goalty status goal in
     let status, goalsort = typeof status (ctx_of goalty) goalty in
+    let goalsort = fix_sorts goalsort in
     sort := Some goalsort;
     exec id_tac status goal)
   in
@@ -514,7 +518,9 @@ let rewrite_tac ~dir ~what:(_,_,what) ~where status =
    | _ -> assert false 
  in
  let name =
-  match dir with `LeftToRight -> "eq_elim_r" | `RightToLeft -> "eq" ^ suffix
+  match dir with
+     `LeftToRight -> "eq" ^ suffix ^ "_r"
+   | `RightToLeft -> "eq" ^ suffix
  in
   block_tac
    [ select_tac ~where ~job:(`Substexpand 1) true;
@@ -567,6 +573,21 @@ let case1_tac name =
              if name = "_clearme" then clear_tac ["_clearme"] else id_tac ]
 ;;
 
+let constructor ?(num=1) ~args status goal = 
+  if num < 1 then fail (lazy "constructor numbers begin with 1");
+  let gty = get_goalty status goal in
+  let status, (r,_,_,_) = analyse_indty status gty in
+  let ref = NReference.mk_constructor num r in
+  let t = 
+    if args = [] then Ast.NRef ref else
+    Ast.Appl (HExtlib.list_concat ~sep:[Ast.Implicit `Vector]
+      ([Ast.NRef ref] :: List.map (fun _,_,x -> [x]) args))
+  in
+  exec (apply_tac ("",0,t)) status goal
+;;
+
+let constructor_tac ?num ~args = distribute_tac (constructor ?num ~args);;
+
 let assert0_tac (hyps,concl) = distribute_tac (fun status goal ->
  let gty = get_goalty status goal in
  let eq status ctx t1 t2 =