From a8b3c907cb2d6da16bdeea10b943552dc9efc0ed Mon Sep 17 00:00:00 2001
From: Emilio Jesus Gallego Arias
Date: Wed, 5 Jun 2019 17:48:46 +0200
Subject: [proof] Move proofs that have an associated constant to `Lemmas`

The main idea of this PR is to distinguish the types of "proof object"
`Proof_global.t` and the type of "proof object associated to a
constant, the new `Lemmas.t`.

This way, we can move the terminator setup to the higher layer in
`vernac`, which is the one that really knows about constants, paving
the way for further simplification and in particular for a unified
handling of constant saving by removal of the control inversion here.

Terminators are now internal to `Lemmas`, as it is the only part of
the code applying them.

As a consequence, proof nesting is now handled by `Lemmas`, and
`Proof_global.t` is just a single `Proof.t` plus some environmental
meta-data.

We are also enable considerable simplification in a future PR, as this
patch makes `Proof.t` and `Proof_global.t` essentially the same, so we
should expect to handle them under a unified interface.
---
 plugins/derive/derive.mli | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'plugins/derive/derive.mli')

diff --git a/plugins/derive/derive.mli b/plugins/derive/derive.mli
index 6bb923118e..ffbc726e22 100644
--- a/plugins/derive/derive.mli
+++ b/plugins/derive/derive.mli
@@ -12,4 +12,8 @@
     (which can contain references to [f]) in the context extended by
     [f:=?x]. When the proof ends, [f] is defined as the value of [?x]
     and [lemma] as the proof. *)
-val start_deriving : Names.Id.t -> Constrexpr.constr_expr -> Names.Id.t -> Proof_global.t
+val start_deriving
+  :  Names.Id.t
+  -> Constrexpr.constr_expr
+  -> Names.Id.t
+  -> Lemmas.t
-- 
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