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| author |  Pierre-Marie Pédrot <pierre-marie.pedrot@inria.fr> | 2017-09-09 21:47:17 +0200 |
|---|---|---|
| committer | Pierre-Marie Pédrot <pierre-marie.pedrot@inria.fr> | 2017-09-28 16:51:21 +0200 |
| commit | d28304f6ba18ad9527a63cd01b39a5ad27526845 (patch) | |
| tree | ddd8c5d10f0d1e52c675e8e027053fac7f05f259 /pretyping/coercion.ml | |
| parent | b9740771e8113cb9e607793887be7a12587d0326 (diff) | |
Efficient fresh name generation relying on sets.
The old algorithm was relying on list membership, which is O(n). This was
nefarious for terms with many binders. We use instead sets in O(log n).
Diffstat (limited to 'pretyping/coercion.ml')
| -rw-r--r-- | pretyping/coercion.ml | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/pretyping/coercion.ml b/pretyping/coercion.ml index fc0a650bc..7cfd2e27d 100644 --- a/pretyping/coercion.ml +++ b/pretyping/coercion.ml @@ -205,7 +205,7 @@ and coerce ?loc env evdref (x : EConstr.constr) (y : EConstr.constr) | _ -> subco ()) | Prod (name, a, b), Prod (name', a', b') -> let name' = - Name (Namegen.next_ident_away Namegen.default_dependent_ident (Termops.ids_of_context env)) + Name (Namegen.next_ident_away Namegen.default_dependent_ident (Termops.vars_of_env env)) in let env' = push_rel (LocalAssum (name', a')) env in let c1 = coerce_unify env' (lift 1 a') (lift 1 a) in |