diff options
Diffstat (limited to 'kernel/vars.ml')
| -rw-r--r-- | kernel/vars.ml | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/kernel/vars.ml b/kernel/vars.ml index 1469192b1..12c1529c8 100644 --- a/kernel/vars.ml +++ b/kernel/vars.ml @@ -131,8 +131,15 @@ let substkey = Profile.declare_profile "substn_many";; let substn_many lamv n c = Profile.profile3 substkey substn_many lamv n c;; *) -let substnl laml n = - substn_many (Array.map make_substituend (Array.of_list laml)) n +let make_subst = function +| [] -> [||] +| hd :: tl -> + let subst = Array.make (1 + List.length tl) (make_substituend hd) in + let iteri i x = Array.unsafe_set subst (succ i) (make_substituend x) in + let () = CList.iteri iteri tl in + subst + +let substnl laml n = substn_many (make_subst laml) n let substl laml = substnl laml 0 let subst1 lam = substl [lam] |