From b0b3cc67e01b165272588b2d8bc178840ba83945 Mon Sep 17 00:00:00 2001
From: Guillaume Bertholon
Date: Fri, 13 Jul 2018 16:22:35 +0200
Subject: Add primitive float computation in Coq kernel

Beware of 0. = -0. issue for primitive floats

The IEEE 754 declares that 0. and -0. are treated equal but we cannot
say that this is true with Leibniz equality.
Therefore we must patch the equality and the total comparison inside the
kernel to prevent inconsistency.
---
 plugins/extraction/extraction.ml | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'plugins/extraction')

diff --git a/plugins/extraction/extraction.ml b/plugins/extraction/extraction.ml
index cca212f332..872f30135f 100644
--- a/plugins/extraction/extraction.ml
+++ b/plugins/extraction/extraction.ml
@@ -351,7 +351,7 @@ let rec extract_type env sg db j c args =
             | (Info, TypeScheme) ->
               extract_type_app env sg db (r, type_sign env sg ty) args
             | (Info, Default) -> Tunknown))
-    | Cast _ | LetIn _ | Construct _ | Int _ -> assert false
+    | Cast _ | LetIn _ | Construct _ | Int _ | Float _ -> assert false
 
 (*s Auxiliary function dealing with type application.
   Precondition: [r] is a type scheme represented by the signature [s],
@@ -690,6 +690,7 @@ let rec extract_term env sg mle mlt c args =
        let extract_var mlt = put_magic (mlt,vty) (MLglob (GlobRef.VarRef v)) in
        extract_app env sg mle mlt extract_var args
     | Int i -> assert (args = []); MLuint i
+    | Float _ -> assert false (* TODO: Implement primitive float for extraction *)
     | Ind _ | Prod _ | Sort _ -> assert false
 
 (*s [extract_maybe_term] is [extract_term] for usual terms, else [MLdummy] *)
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