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| author | Ricardo Signes <rjbs@cpan.org> | 2013-06-17 18:21:51 -0400 |
|---|---|---|
| committer | Ricardo Signes <rjbs@cpan.org> | 2013-06-18 19:01:53 -0400 |
| commit | 3e8a637058231ac4d3a9cedc549bfb1b8ee36c68 (patch) | |
| tree | ddcab8c7979f58457c6b6ce87a6121cd14deb74b /pod/perlfunc.pod | |
| parent | b79536ea166b1ad79b3c02ab33e1d9f71044b45c (diff) | |
| download | perl-3e8a637058231ac4d3a9cedc549bfb1b8ee36c68.tar.gz | |
document that goto-EXPR will treat a subref differently
This has been the case since Perl 5.8 at least, and possibly longer.
This resolves [perl #118523].
Diffstat (limited to 'pod/perlfunc.pod')
| -rw-r--r-- | pod/perlfunc.pod | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/pod/perlfunc.pod b/pod/perlfunc.pod index 4562b2c905..9428a4d67a 100644 --- a/pod/perlfunc.pod +++ b/pod/perlfunc.pod @@ -2929,7 +2929,12 @@ The author of Perl has never felt the need to use this form of C<goto> does not offer named loops combined with loop control. Perl does, and this replaces most structured uses of C<goto> in other languages.) -The C<goto-EXPR> form expects a label name, whose scope will be resolved +The C<goto-EXPR> form expects to evaluate C<EXPR> to a code reference or +a label name. If it evaluates to a code reference, it will be handled +like C<goto-&NAME>, below. This is especially useful for implementing +tail recursion via C<goto __SUB__>. + +If the expression evaluates to a label name, its scope will be resolved dynamically. This allows for computed C<goto>s per FORTRAN, but isn't necessarily recommended if you're optimizing for maintainability: |