Stuff moved from old Matita.

[helm.git] / matita / components / ng_kernel / nCicSubstitution.mli

diff --git a/matita/components/ng_kernel/nCicSubstitution.mli b/matita/components/ng_kernel/nCicSubstitution.mli
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+(*
+    ||M||  This file is part of HELM, an Hypertextual, Electronic        
+    ||A||  Library of Mathematics, developed at the Computer Science     
+    ||T||  Department, University of Bologna, Italy.                     
+    ||I||                                                                
+    ||T||  HELM is free software; you can redistribute it and/or         
+    ||A||  modify it under the terms of the GNU General Public License   
+    \   /  version 2 or (at your option) any later version.      
+     \ /   This software is distributed as is, NO WARRANTY.     
+      V_______________________________________________________________ *)
+
+(* $Id$ *)
+
+val set_ppterm : (context:NCic.context -> 
+  subst:NCic.substitution -> 
+  metasenv:NCic.metasenv ->
+  ?inside_fix:bool ->
+   NCic.term -> string) -> unit
+
+val lift_from : ?no_implicit:bool -> int -> int -> NCic.term -> NCic.term 
+
+(* lift n t                                                              *)
+(*  lifts [t] of [n]                                                     *)
+(*  [from] default 1, lifts only indexes >= [from]                       *)
+(*  NOTE: the opposite function (delift_rels) is defined in CicMetaSubst *)
+(*  since it needs to restrict the metavariables in case of failure      *)
+val lift : ?from:int -> ?no_implicit:bool -> int -> NCic.term -> NCic.term
+
+(* subst t1 t2                                                          *)
+(*  substitutes [t1] for [Rel 1] in [t2]                                *)
+(*  if avoid_beta_redexes is true (default: false) no new beta redexes  *)
+(*  are generated. WARNING: the substitution can diverge when t2 is not *)
+(*  well typed and avoid_beta_redexes is true.                          *)
+val subst : 
+  ?avoid_beta_redexes:bool -> ?no_implicit:bool -> 
+  NCic.term -> NCic.term -> NCic.term
+
+(* psubst [avoid] [map_arg] [args] [t]            
+ *  [avoid] : do not leave newly created beta-redexes, default false
+ *  [t] : term to fill in
+ *  [args] : stuff to substitute
+ *  [map_arg] : map the argument to obtain a term
+ *    the function is ReductionStrategy.from_env_for_unwind when psubst is
+ *    used to implement nCicReduction.unwind'                              *)
+val psubst : 
+  ?avoid_beta_redexes:bool -> ?no_implicit:bool ->
+  ('a -> NCic.term) -> 'a list -> NCic.term -> 
+    NCic.term
+
+(* subst_meta (n, Ctx [t_1 ; ... ; t_n]) t                                  *)
+(*  returns the term [t] where [Rel i] is substituted with [t_i] lifted by n *)
+(*  [t_i] is lifted as usual when it crosses an abstraction                  *)
+(* subst_meta (n, Irl _) t -> lift n t                                        *)
+val subst_meta : NCic.local_context -> NCic.term -> NCic.term
+