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Diffstat (limited to 'pod/perlref.pod')
| -rw-r--r-- | pod/perlref.pod | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/pod/perlref.pod b/pod/perlref.pod index 6aa086088d..34c071fcfe 100644 --- a/pod/perlref.pod +++ b/pod/perlref.pod @@ -15,9 +15,9 @@ hashes, hashes of arrays, arrays of hashes of functions, and so on. Hard references are smart--they keep track of reference counts for you, automatically freeing the thing referred to when its reference count goes -to zero. (Note: The reference counts for values in self-referential or +to zero. (Note: the reference counts for values in self-referential or cyclic data structures may not go to zero without a little help; see -L<perlobj/"Two-Phased Garbage Collection"> for a detailed explanation. +L<perlobj/"Two-Phased Garbage Collection"> for a detailed explanation.) If that thing happens to be an object, the object is destructed. See L<perlobj> for more about objects. (In a sense, everything in Perl is an object, but we usually reserve the word for references to objects that @@ -120,6 +120,15 @@ reference to it, you have these options: sub hashem { +{ @_ } } # ok sub hashem { return { @_ } } # ok +On the other hand, if you want the other meaning, you can do this: + + sub showem { { @_ } } # ambiguous (currently ok, but may change) + sub showem { {; @_ } } # ok + sub showem { { return @_ } } # ok + +Note how the leading C<+{> and C<{;> always serve to disambiguate +the expression to mean either the HASH reference, or the BLOCK. + =item 4. A reference to an anonymous subroutine can be constructed by using |