diff options
| -rw-r--r-- | Doc/lib/libweakref.tex | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/Doc/lib/libweakref.tex b/Doc/lib/libweakref.tex index 12a1220..fc88916 100644 --- a/Doc/lib/libweakref.tex +++ b/Doc/lib/libweakref.tex @@ -58,7 +58,8 @@ be made to support weak references; see section \ref{weakref-extension}, retrieved by calling the reference object if the referent is still alive; if the referent is no longer alive, calling the reference object will cause \code{None} to be returned. If \var{callback} is - provided, it will be called when the object is about to be + provided and not \constant{None}, + it will be called when the object is about to be finalized; the weak reference object will be passed as the only parameter to the callback; the referent will no longer be available. |