diff options
author | Maxime Dénès <mail@maximedenes.fr> | 2017-05-09 22:14:35 +0200 |
---|---|---|
committer | Maxime Dénès <mail@maximedenes.fr> | 2017-06-06 12:58:57 +0200 |
commit | 954fbd3b102060ed1e2122f571a430f05a174e42 (patch) | |
tree | a6f3db424624eae05ded3be6a84357d1ad291eda /pretyping/indrec.mli | |
parent | 2f23c27e08f66402b8fba4745681becd402f4c5c (diff) |
Remove the Sigma (monotonous state) API.
Reminder of (some of) the reasons for removal:
- Despite the claim in sigma.mli, it does *not* prevent evar
leaks, something like:
fun env evd ->
let (evd',ev) = new_evar env evd in
(evd,ev)
will typecheck even with Sigma-like type annotations (with a proof of
reflexivity)
- The API stayed embryonic. Even typing functions were not ported to
Sigma.
- Some unsafe combinators (Unsafe.tclEVARS) were replaced with slightly
less unsafe ones (e.g. s_enter), but those ones were not marked unsafe
at all (despite still being so).
- There was no good story for higher order functions manipulating evar
maps. Without higher order, one can most of the time get away with
reusing the same name for the updated evar map.
- Most of the code doing complex things with evar maps was using unsafe
casts to sigma. This code should be fixed, but this is an orthogonal
issue.
Of course, this was showing a nice and elegant use of GADTs, but the
cost/benefit ratio in practice did not seem good.
Diffstat (limited to 'pretyping/indrec.mli')
-rw-r--r-- | pretyping/indrec.mli | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/pretyping/indrec.mli b/pretyping/indrec.mli index 192b64a5e..a22470ae8 100644 --- a/pretyping/indrec.mli +++ b/pretyping/indrec.mli @@ -26,14 +26,14 @@ type dep_flag = bool (** Build a case analysis elimination scheme in some sort family *) -val build_case_analysis_scheme : env -> 'r Sigma.t -> pinductive -> - dep_flag -> sorts_family -> (constr, 'r) Sigma.sigma +val build_case_analysis_scheme : env -> Evd.evar_map -> pinductive -> + dep_flag -> sorts_family -> evar_map * Constr.t (** Build a dependent case elimination predicate unless type is in Prop or is a recursive record with primitive projections. *) -val build_case_analysis_scheme_default : env -> 'r Sigma.t -> pinductive -> - sorts_family -> (constr, 'r) Sigma.sigma +val build_case_analysis_scheme_default : env -> evar_map -> pinductive -> + sorts_family -> evar_map * Constr.t (** Builds a recursive induction scheme (Peano-induction style) in the same sort family as the inductive family; it is dependent if not in Prop |