From ab85be0ab41251ece3b583c3ff38f08f546f6414 Mon Sep 17 00:00:00 2001
From: gareuselesinge
Date: Thu, 8 Aug 2013 18:52:29 +0000
Subject: Vernac classification streamlined (handles VERNAC EXTEND)

The warning output by vernacextend when the classifier is missing
is the documentation of this commit:

Warning: Vernac entry "Foo" misses a classifier. A classifier is a
function that returns an expression of type vernac_classification (see
Vernacexpr). You can:
- Use '... EXTEND Foo CLASSIFIED AS QUERY ...' if the new
  vernacular command does not alter the system state;
- Use '... EXTEND Foo CLASSIFIED AS SIDEFF ...' if the new
  vernacular command alters the system state but not the parser nor it starts
  a proof or ends one;
- Use '... EXTEND Foo CLASSIFIED BY f ...' to specify a global
  function f.  The function f will be called passing "Foo" as the
  only argument;
- Add a specific classifier in each clause using the syntax:
  '[...] => [ f ] -> [...]'.
Specific classifiers have precedence over global classifiers. Only one
classifier is called.

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@16680 85f007b7-540e-0410-9357-904b9bb8a0f7
---
 plugins/funind/g_indfun.ml4 | 36 +++++++++++++++++++++++-------------
 1 file changed, 23 insertions(+), 13 deletions(-)

(limited to 'plugins/funind')

diff --git a/plugins/funind/g_indfun.ml4 b/plugins/funind/g_indfun.ml4
index 7ab9488def..7e229fbd2e 100644
--- a/plugins/funind/g_indfun.ml4
+++ b/plugins/funind/g_indfun.ml4
@@ -155,12 +155,21 @@ type function_rec_definition_loc_argtype = (Vernacexpr.fixpoint_expr * Vernacexp
 
 let (wit_function_rec_definition_loc : function_rec_definition_loc_argtype Genarg.uniform_genarg_type) =
   Genarg.create_arg None "function_rec_definition_loc"
-VERNAC COMMAND EXTEND Function
-   ["Function" ne_function_rec_definition_loc_list_sep(recsl,"with")] ->
-	[
-	  do_generate_principle false (List.map snd recsl);
 
-	]
+(* TASSI: n'importe quoi ! *)
+VERNAC COMMAND EXTEND Function
+   ["Function" ne_function_rec_definition_loc_list_sep(recsl,"with")]
+    => [ let hard = List.exists (function
+           | _,((_,(_,(CMeasureRec _|CWfRec _)),_,_,_),_) -> true
+           | _,((_,(_,CStructRec),_,_,_),_) -> false) recsl in
+         match
+           Vernac_classifier.classify_vernac
+             (Vernacexpr.VernacFixpoint(None, List.map snd recsl))
+         with
+         | Vernacexpr.VtSideff ids, _ when hard ->
+             Vernacexpr.VtStartProof ("Classic", ids), Vernacexpr.VtLater
+         | x -> x ]
+    -> [ do_generate_principle false (List.map snd recsl) ]
 END
 
 let pr_fun_scheme_arg (princ_name,fun_name,s) =
@@ -191,7 +200,9 @@ let warning_error names e =
 
 
 VERNAC COMMAND EXTEND NewFunctionalScheme
-   ["Functional" "Scheme" ne_fun_scheme_arg_list_sep(fas,"with") ] ->
+   ["Functional" "Scheme" ne_fun_scheme_arg_list_sep(fas,"with") ]
+   => [ Vernacexpr.VtSideff(List.map pi1 fas), Vernacexpr.VtLater ]
+   ->
     [
       begin
 	try
@@ -225,14 +236,13 @@ END
 (***** debug only ***)
 
 VERNAC COMMAND EXTEND NewFunctionalCase
-   ["Functional" "Case" fun_scheme_arg(fas) ] ->
-    [
-      Functional_principles_types.build_case_scheme fas
-    ]
+  ["Functional" "Case" fun_scheme_arg(fas) ]
+  => [ Vernacexpr.VtSideff[pi1 fas], Vernacexpr.VtLater ]
+  -> [ Functional_principles_types.build_case_scheme fas ]
 END
 
 (***** debug only ***)
-VERNAC COMMAND EXTEND GenerateGraph
+VERNAC COMMAND EXTEND GenerateGraph CLASSIFIED AS QUERY
 ["Generate" "graph" "for" reference(c)] -> [ make_graph (Nametab.global c) ]
 END
 
@@ -449,11 +459,11 @@ TACTIC EXTEND poseq
       [ poseq x c ]
 END
 
-VERNAC COMMAND EXTEND Showindinfo
+VERNAC COMMAND EXTEND Showindinfo CLASSIFIED AS QUERY
   [ "showindinfo" ident(x) ] -> [ Merge.showind x ]
 END
 
-VERNAC COMMAND EXTEND MergeFunind
+VERNAC COMMAND EXTEND MergeFunind CLASSIFIED AS SIDEFF
   [ "Mergeschemes" "(" ident(id1) ne_ident_list(cl1) ")"
       "with" "(" ident(id2) ne_ident_list(cl2)  ")" "using" ident(id) ] ->
      [
-- 
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