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'__close' gets no error object if there is no error

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Instead of receiving nil as a second argument, __close metamethods are
called with just one argument when there are no errors.
This commit is contained in:
Roberto Ierusalimschy
2025-02-28 10:10:27 -03:00
parent f9e35627ed
commit 127a8e80fe
4 changed files with 60 additions and 27 deletions
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manual/manual.of
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@@ -1612,10 +1612,11 @@ or exiting by an error.
Here, to @emph{close} a value means
to call its @idx{__close} metamethod.
When calling the metamethod,
the value itself is passed as the first argument
and the error object that caused the exit (if any)
the value itself is passed as the first argument.
If there was an error,
the error object that caused the exit
is passed as a second argument;
if there was no error, the second argument is @nil.
otherwise, there is no second argument.
The value assigned to a to-be-closed variable
must have a @idx{__close} metamethod