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-rw-r--r--kernel/mod_subst.mli5
1 files changed, 3 insertions, 2 deletions
diff --git a/kernel/mod_subst.mli b/kernel/mod_subst.mli
index fc2b0441..cd9fa792 100644
--- a/kernel/mod_subst.mli
+++ b/kernel/mod_subst.mli
@@ -68,8 +68,9 @@ val empty_subst : substitution
val is_empty_subst : substitution -> bool
-(** add_* add [arg2/arg1]\{arg3\} to the substitution with no
- sequential composition *)
+(** add_* add [arg2/arg1]\{arg3\} to the substitution with no sequential
+ composition. Most often this is not what you want. For sequential
+ composition, try [join (map_mbid mp delta) subs] **)
val add_mbid :
MBId.t -> module_path -> delta_resolver -> substitution -> substitution
val add_mp :