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  • Committer: Package Import Robot
  • Author(s): Stéphane Glondu
  • Date: 2012-01-03 23:42:48 UTC
  • mfrom: (1.2.4)
  • Revision ID: package-import@ubuntu.com-20120103234248-p9r8h1579n67v55a
Tags: 8.3pl3-1
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library/heads.ml
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(************************************************************************)
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(*  v      *   The Coq Proof Assistant  /  The Coq Development Team     *)
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(* <O___,, *   INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2010     *)
 
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(* <O___,, *   INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2011     *)
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(*   \VV/  **************************************************************)
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(*    //   *      This file is distributed under the terms of the       *)
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(*         *       GNU Lesser General Public License Version 2.1        *)
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(************************************************************************)
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(* $Id: heads.ml 13323 2010-07-24 15:57:30Z herbelin $ *)
 
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(* $Id: heads.ml 14641 2011-11-06 11:59:10Z herbelin $ *)
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open Pp
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open Util
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        match pi2 (lookup_named id env) with
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        | Some c -> aux k l c b
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        | None -> NotImmediatelyComputableHead)
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  | Const cst -> on_subterm k l b (constant_head cst)
 
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  | Const cst ->
 
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      (try on_subterm k l b (constant_head cst)
 
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       with Not_found -> assert false)
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  | Construct _ | CoFix _ ->
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      if b then NotImmediatelyComputableHead else ConstructorHead
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  | Sort _ | Ind _ | Prod _ -> RigidHead RigidType