SearchAbout and similar: add a customizable blacklist

 Instead of hard-coding in search.ml some substrings such
 as "_admitted" or "_subproof" we don't want to see in results
 of SearchAbout and co, we now have a user command:

  Add Search Blacklist "foo".
  Remove Search Blacklist "foo". (* the opposite *)
  Print Table Search Blacklist. (* the current state *)

 In Prelude.v, three substrings are blacklisted originally:
  - "_admitted" for internal lemmas due to admit.
  - "_subproof" for internal lemmas due to abstract.
  - "Private_" for hiding auxiliary modules not meant for
    global usage.

 Note that substrings are searched in the fully qualified names
 of the available lemmas (e.g. "Coq.Init.Peano.plus").

 This commit also adds the prefix "Private_" to some internal modules
 in Numbers, Z, N, etc.

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@14408 85f007b7-540e-0410-9357-904b9bb8a0f7

3 files changed, 4 insertions, 3 deletions

diff --git a/theories/Numbers/Integer/Abstract/ZDivEucl.v b/theories/Numbers/Integer/Abstract/ZDivEucl.v
index 954b89150..fe951a751 100644
--- a/theories/Numbers/Integer/Abstract/ZDivEucl.v
+++ b/theories/Numbers/Integer/Abstract/ZDivEucl.v
@@ -43,7 +43,7 @@ Module ZEuclidProp
  (Import C : ZSgnAbsProp A B)
  (Import D : ZEuclid' A).
 
- Module Import NZDivP := Nop <+ NZDivProp A D B.
+ Module Import Private_NZDiv := Nop <+ NZDivProp A D B.
 
 (** Another formulation of the main equation *)
 
diff --git a/theories/Numbers/Integer/Abstract/ZDivFloor.v b/theories/Numbers/Integer/Abstract/ZDivFloor.v
index 0e54c453b..14003d892 100644
--- a/theories/Numbers/Integer/Abstract/ZDivFloor.v
+++ b/theories/Numbers/Integer/Abstract/ZDivFloor.v
@@ -32,7 +32,7 @@ Module Type ZDivProp
  (Import C : ZSgnAbsProp A B).
 
 (** We benefit from what already exists for NZ *)
-Module Import NZDivP := Nop <+ NZDivProp A A B.
+Module Import Private_NZDiv := Nop <+ NZDivProp A A B.
 
 (** Another formulation of the main equation *)
 
diff --git a/theories/Numbers/Integer/Abstract/ZDivTrunc.v b/theories/Numbers/Integer/Abstract/ZDivTrunc.v
index 74abedb42..bd8b6ce23 100644
--- a/theories/Numbers/Integer/Abstract/ZDivTrunc.v
+++ b/theories/Numbers/Integer/Abstract/ZDivTrunc.v
@@ -33,6 +33,7 @@ Module Type ZQuotProp
 
 (** We benefit from what already exists for NZ *)
 
+ Module Import Private_Div.
  Module Quot2Div <: NZDiv A.
   Definition div := quot.
   Definition modulo := A.rem.
@@ -41,8 +42,8 @@ Module Type ZQuotProp
   Definition div_mod := quot_rem.
   Definition mod_bound_pos := rem_bound_pos.
  End Quot2Div.
-
  Module NZQuot := Nop <+ NZDivProp A Quot2Div B.
+ End Private_Div.
 
 Ltac pos_or_neg a :=
  let LT := fresh "LT" in