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authorPerl 5 Porters <perl5-porters@africa.nicoh.com>1997-03-09 11:57:19 +1200
committerChip Salzenberg <chip@atlantic.net>1997-03-09 11:57:19 +1200
commit68dc074516a6859e3424b48d1647bcb08b1a1a7d (patch)
tree125011c6d8e4a04727ff97166dc19199809958e4 /pod/perldata.pod
parent699e6cd4da8c333ef83554732e73ab6734463b5d (diff)
downloadperl-68dc074516a6859e3424b48d1647bcb08b1a1a7d.tar.gz
[inseparable changes from match from perl-5.003_93 to perl-5.003_94]
BUILD PROCESS Subject: Don't use db 2.x, we're not yet ready for it From: Paul Marquess <pmarquess@bfsec.bt.co.uk> Files: Configure Subject: Warn if #! command is longer than 32 chars From: Chip Salzenberg <chip@perl.com> Files: Configure Subject: patches re perl -wc install{perl,man} Date: Tue, 11 Mar 97 13:13:16 GMT From: Robin Barker <rmb1@cise.npl.co.uk> Files: installman installperl I got the new installhtml from CPAN (TOMC/scripts/pod2html-v2.0beta.shar.gz) I had problems getting the system call to splitpod at line 376 to work. 1. splitroot was not being found 2. splitroot was not finding its library 3. I changed htmlroot to podroot at line 175 to match the documentation. p5p-msgid: 3180.9703270906@tempest.cise.npl.co.uk private-msgid: 21544.9703111313@tempest.cise.npl.co.uk Subject: 3_93 doesn't install pods Date: Sun, 16 Mar 1997 02:21:35 -0500 From: Spider Boardman <spider@orb.nashua.nh.us> Files: installperl Msg-ID: 199703160721.CAA08339@Orb.Nashua.NH.US (applied based on p5p patch as commit 43506a616735d616e03d277d64fbae1e864024bf) Subject: When installing, use File::Copy instead of `cp` From: Chip Salzenberg <chip@perl.com> Files: installperl Subject: Make hint files' warnings more visible Date: Thu, 20 Mar 1997 23:18:03 +0100 (MET) From: Hallvard B Furuseth <h.b.furuseth@usit.uio.no> Files: hints/3b1.sh hints/apollo.sh hints/cxux.sh hints/dcosx.sh hints/dgux.sh hints/esix4.sh hints/freebsd.sh hints/hpux.sh hints/irix_4.sh hints/mips.sh hints/next_3_0.sh hints/os2.sh hints/qnx.sh hints/sco_2_3_3.sh hints/sco_2_3_4.sh hints/solaris_2.sh hints/ultrix_4.sh hints/utekv.sh private-msgid: 199703202218.XAA09041@bombur2.uio.no CORE LANGUAGE CHANGES Subject: Defer creation of array and hash elements as parameters From: Chip Salzenberg <chip@perl.com> Files: dump.c global.sym mg.c op.c op.h perl.h pp.c pp_hot.c proto.h sv.c Subject: New special literal: __PACKAGE__ From: Chip Salzenberg <chip@perl.com> Files: keywords.pl pod/perldata.pod toke.c Subject: Abort compilation at C<BEGIN{}> or C<use> after errors From: Chip Salzenberg <chip@perl.com> Files: op.c pod/perldiag.pod t/pragma/subs.t Subject: allow C<substr 'hello', -10> Date: Mon, 10 Mar 1997 15:55:44 -0800 From: David Dyck <dcd@tc.fluke.com> Files: pp.c Msg-ID: 97Mar10.155517pst.35716-2@gateway.fluke.com (applied based on p5p patch as commit 77f720bf92f3d0100352416caeedd57936807ff2) Subject: Regularize C<x % y>, esp. when y is negative From: Chip Salzenberg <chip@perl.com> Files: pp.c Subject: Flush before C<flock(FOO, LOCK_UN)> From: Chip Salzenberg <chip@perl.com> Files: pod/perldelta.pod pod/perlfunc.pod pp_sys.c Subject: Close loopholes in prototype mismatch warning From: Chip Salzenberg <chip@perl.com> Files: op.c sv.c toke.c Subject: Warn on C<while ($x = each %y) {}> From: Chip Salzenberg <chip@perl.com> Files: op.c pod/perldiag.pod Subject: Don't warn on C<print $fh func()> From: Chip Salzenberg <chip@perl.com> Files: toke.c CORE PORTABILITY Subject: Don't say 'static var = 1' Date: Sun, 9 Mar 1997 15:19:57 +0200 (EET) From: Jarkko Hietaniemi <jhi@iki.fi> Files: malloc.c private-msgid: 199703091319.PAA24714@alpha.hut.fi Subject: HP/UX hint comments Date: Fri, 21 Mar 1997 15:43:07 -0500 (EST) From: Andy Dougherty <doughera@fractal.phys.lafayette.edu> Files: hints/hpux.sh private-msgid: Pine.SOL.3.95q.970321153918.28770B-100000@fractal.lafayette. Subject: VMS update Date: Tue, 11 Mar 1997 22:00:55 -0500 (EST) From: Charles Bailey <bailey@hmivax.humgen.upenn.edu> Files: lib/ExtUtils/MM_VMS.pm lib/Test/Harness.pm t/op/taint.t utils/perlbug.PL vms/descrip.mms Msg-ID: 1997Mar11.220056.1873182@hmivax.humgen.upenn.edu (applied based on p5p patch as commit 2b5725676da60b49978f38b85bb7f8ee20b4cb55) Subject: vmsish.t and related patches Date: Fri, 21 Mar 1997 01:32:47 -0500 (EST) From: Charles Bailey <bailey@HMIVAX.HUMGEN.UPENN.EDU> Files: MANIFEST perl.h vms/descrip.mms vms/ext/vmsish.t vms/vms.c private-msgid: 01IGQW3IP1KK005VFB@hmivax.humgen.upenn.edu Subject: Win32 update (four patches) From: Gurusamy Sarathy <gsar@engin.umich.edu> Files: MANIFEST README.win32 lib/AutoSplit.pm lib/Cwd.pm lib/ExtUtils/Command.pm lib/ExtUtils/Install.pm lib/ExtUtils/MM_OS2.pm lib/ExtUtils/MM_Unix.pm lib/ExtUtils/MM_Win32.pm lib/ExtUtils/MakeMaker.pm lib/ExtUtils/Mksymlists.pm lib/File/Basename.pm lib/File/Path.pm mg.c t/comp/cpp.t t/comp/script.t t/harness t/io/argv.t t/io/dup.t t/io/fs.t t/io/inplace.t t/lib/filehand.t t/lib/io_dup.t t/lib/io_sel.t t/lib/io_taint.t t/op/closure.t t/op/exec.t t/op/glob.t t/op/goto.t t/op/magic.t t/op/misc.t t/op/rand.t t/op/split.t t/op/stat.t t/op/sysio.t t/op/taint.t t/pragma/strict.t t/pragma/subs.t t/pragma/warning.t util.c win32/* DOCUMENTATION Subject: perlfaq.pod Date: Mon, 17 Mar 1997 16:01:40 -0700 From: Tom Christiansen <tchrist@jhereg.perl.com> Files: MANIFEST pod/Makefile pod/buildtoc pod/perl.pod pod/perlfaq*.pod pod/roffitall private-msgid: 199703172301.QAA12566@jhereg.perl.com Subject: *.pod changes based on the FAQ Date: Mon, 17 Mar 1997 09:50:14 -0700 (MST) From: Nat Torkington <gnat@frii.com> Files: pod/perldata.pod pod/perlfunc.pod pod/perlipc.pod pod/perlop.pod pod/perlre.pod pod/perlrun.pod pod/perlsec.pod pod/perlvar.pod Msg-ID: 199703171650.JAA02655@elara.frii.com (applied based on p5p patch as commit 3c10ad8e31f7d77e71c048b1746912f41cb540f0) Subject: Document that $. is not reset on implicit open From: Chip Salzenberg <chip@perl.com> Files: pod/perldelta.pod Subject: Re: Embedding success with _93 Date: Tue, 11 Mar 1997 17:55:05 -0500 From: Doug MacEachern <dougm@opengroup.org> Files: pod/perldelta.pod Msg-ID: 199703112255.RAA22775@postman.osf.org (applied based on p5p patch as commit 63a6ff3a1dc8d86edb4d8a7ec1548205e32a7114) Subject: Patch to document illegal characters Date: Fri, 14 Mar 1997 09:08:10 -0800 (PST) From: Tom Phoenix <rootbeer@teleport.com> Files: pod/perldiag.pod pod/perltrap.pod private-msgid: Pine.GSO.3.96.970314090558.15346J-100000@kelly.teleport.com Subject: Document trap with //o and closures Date: Mon, 10 Mar 1997 18:08:08 -0500 (EST) From: Charles Bailey <bailey@HMIVAX.HUMGEN.UPENN.EDU> Files: pod/perltrap.pod Msg-ID: 01IGCHWRNSEU00661G@hmivax.humgen.upenn.edu (applied based on p5p patch as commit a54cb1465fdb400848f23705a6f130bb5c34ab70) Subject: Illegal character in input Date: Mon, 10 Mar 1997 15:21:21 -0800 (PST) From: Tom Phoenix <rootbeer@teleport.com> Files: pod/perldiag.pod private-msgid: Pine.GSO.3.95q.970310151512.22489a-100000@kelly.teleport.com Subject: Patch for docs Re: Lost backslash Date: Wed, 19 Mar 1997 07:28:57 -0800 (PST) From: Tom Phoenix <rootbeer@teleport.com> Files: pod/perlop.pod private-msgid: Pine.GSO.3.96.970319071438.24834G-100000@kelly.teleport.com Subject: XSUB's doc fix Date: Mon, 10 Mar 1997 11:42:06 -0500 From: Roderick Schertler <roderick@argon.org> Files: pod/perlcall.pod pod/perlguts.pod pod/perlxstut.pod Msg-ID: 28804.858012126@eeyore.ibcinc.com (applied based on p5p patch as commit 5f43237038ea7a4151d3bf65aeeecd56ceb78a6a) Subject: Document return from do FILE Date: Tue, 18 Mar 1997 14:50:10 +0000 From: "M.J.T. Guy" <mjtg@cus.cam.ac.uk> Files: pod/perlfunc.pod Msg-ID: E0w70DK-0001yJ-00@ursa.cus.cam.ac.uk (applied based on p5p patch as commit ba8d5fb439878113de8abc9b52d2af237d30fb3c) Subject: Document $^M in perlvar Date: Thu, 20 Mar 97 21:08:33 GMT From: Robin Barker <rmb1@cise.npl.co.uk> Files: pod/perlvar.pod private-msgid: 6153.9703202108@tempest.cise.npl.co.uk Subject: typos in pods of 5.003_93 Date: 19 Mar 1997 10:39:38 -0600 From: Jim Meyering <meyering@asic.sc.ti.com> Files: pod/perlfunc.pod pod/perlguts.pod pod/perlre.pod pod/perltoot.pod pod/perlxs.pod Msg-ID: wpgendbzvhx.fsf@asic.sc.ti.com (applied based on p5p patch as commit 76a9873e006cf8f48f57062b2a0dd40b5ed45a95) Subject: Re: Updates to pod punctuations Date: Fri, 14 Mar 1997 17:00:12 -0500 From: Larry W. Virden <lvirden@cas.org> Files: pod/*.pod private-msgid: 9703141700.AA22911@cas.org Subject: clarify example in perlfunc Date: Thu, 20 Mar 1997 19:46:01 +0200 (EET) From: Jarkko Hietaniemi <jhi@iki.fi> Files: pod/perlfunc.pod private-msgid: 199703201746.TAA25195@alpha.hut.fi Subject: Regularize headings in DB_File documentation From: Chip Salzenberg <chip@perl.com> Files: ext/DB_File/DB_File.pm LIBRARY AND EXTENSIONS Subject: New module: autouse.pm Date: Thu, 20 Mar 1997 19:34:30 -0500 (EST) From: Ilya Zakharevich <ilya@math.ohio-state.edu> Files: MANIFEST lib/autouse.pm Msg-ID: 199703210034.TAA13469@monk.mps.ohio-state.edu (applied based on p5p patch as commit 6757905eccb6dd0440ef65e8128a277a20f7d943) Subject: Refresh DB_File to 1.12 Date: Wed, 12 Mar 97 15:51:14 GMT From: Paul Marquess <pmarquess@bfsec.bt.co.uk> Files: ext/DB_File/DB_File.pm ext/DB_File/DB_File.xs Msg-ID: 9703121551.AA07435@claudius.bfsec.bt.co.uk (applied based on p5p patch as commit b3deed9189f963e9994815307931f9084f60d1d9) Subject: In File::Path, some systems can't remove read-only files From: Chip Salzenberg <chip@perl.com> Files: lib/File/Path.pm Subject: Fix bugs revealed by prototype warnings From: Chip Salzenberg <chip@perl.com> Files: ext/Opcode/Opcode.pm lib/ExtUtils/MakeMaker.pm lib/Getopt/Long.pm Subject: Problems with SKIP in makemaker Date: Thu, 20 Mar 1997 23:13:31 -0500 (EST) From: Ilya Zakharevich <ilya@math.ohio-state.edu> Files: lib/ExtUtils/MM_Unix.pm Msg-ID: 199703210413.XAA21601@monk.mps.ohio-state.edu (applied based on p5p patch as commit 970322a2e8024294ada6e8d1a027cb98f1f48ee3) Subject: In Exporter, don't C<require Carp> at file scope From: Chip Salzenberg <chip@perl.com> Files: lib/Exporter.pm Subject: fix for Exporter's $SIG{__WARN__} handler Date: Thu, 13 Mar 1997 18:40:51 -0500 From: Roderick Schertler <roderick@argon.org> Files: lib/Exporter.pm Msg-ID: 2282.858296451@eeyore.ibcinc.com (applied based on p5p patch as commit 2768ea1aeef34f42d096f198fbe629c8374ca429) Subject: Don't try to substr() refs in Carp From: Chip Salzenberg <chip@perl.com> Files: lib/Carp.pm Subject: Re: NUL in die and other messages Date: Fri, 21 Mar 1997 09:58:17 +0000 From: "M.J.T. Guy" <mjtg@cus.cam.ac.uk> Files: lib/Carp.pm Msg-ID: E0w815V-0005xs-00@ursa.cus.cam.ac.uk (applied based on p5p patch as commit 52a267c574cb66c4bc35601dcf148a1d7a3bc557) OTHER CORE CHANGES Subject: Guard against buffer overflow in yyerror() and related funcs From: Chip Salzenberg <chip@perl.com> Files: toke.c Subject: For bin compat, rename calllist() and he_{,delay}free From: Chip Salzenberg <chip@perl.com> Files: global.sym hv.c op.c perl.c pod/perlguts.pod proto.h Subject: Fix C<print> on tied default handle From: Chip Salzenberg <chip@perl.com> Files: pp_hot.c Subject: Fix C<local($a, undef, $b) = (1,2,3)> From: Chip Salzenberg <chip@perl.com> Files: op.c Subject: Improve diagnostic on C<@a++>, C<--%a>, @a =~ s/a/b/ From: Chip Salzenberg <chip@perl.com> Files: pp.c pp_hot.c Subject: Don't warn on C<$x{y} .= "z"> when %x is tied From: Chip Salzenberg <chip@perl.com> Files: pp_hot.c Subject: Eliminate 'unreachable code' warnings From: Chip Salzenberg <chip@perl.com> Files: ext/POSIX/POSIX.xs mg.c pp_ctl.c toke.c Subject: printf format corrections for -DDEBUGGING Date: Wed, 19 Mar 1997 12:42:50 -0500 From: Roderick Schertler <roderick@argon.org> Files: doop.c malloc.c op.c pp_ctl.c regexec.c sv.c x2p/str.c x2p/util.c Msg-ID: 26592.858793370@eeyore.ibcinc.com (applied based on p5p patch as commit e125f273e351a19a92b69d6244af55abbbf0a26d) Subject: Warn about missing -DMULTIPLICITY if likely a problem Date: Wed, 19 Mar 1997 18:45:53 -0500 From: Doug MacEachern <dougm@opengroup.org> Files: perl.c Msg-ID: 199703192345.SAA15070@postman.osf.org (applied based on p5p patch as commit 71aeea1753924e6e19c2461e241e3f7d8a570e90)
Diffstat (limited to 'pod/perldata.pod')
-rw-r--r--pod/perldata.pod33
1 files changed, 23 insertions, 10 deletions
diff --git a/pod/perldata.pod b/pod/perldata.pod
index 1878f4a5fa..f0837b3854 100644
--- a/pod/perldata.pod
+++ b/pod/perldata.pod
@@ -247,6 +247,11 @@ The usual Unix backslash rules apply for making characters such as
newline, tab, etc., as well as some more exotic forms. See
L<perlop/Quote and Quotelike Operators> for a list.
+Octal or hex representations in string literals (e.g. '0xffff') are not
+automatically converted to their integer representation. The hex() and
+oct() functions make these conversions for you. See L<perlfunc/hex> and
+L<perlfunc/oct> for more details.
+
You can also embed newlines directly in your strings, i.e., they can end
on a different line than they begin. This is nice, but if you forget
your trailing quote, the error will not be reported until Perl finds
@@ -279,16 +284,19 @@ single-quoted string must be separated from a preceding word by a
space, because single quote is a valid (though deprecated) character in
a variable name (see L<perlmod/Packages>).
-Two special literals are __LINE__ and __FILE__, which represent the
-current line number and filename at that point in your program. They
-may be used only as separate tokens; they will not be interpolated into
-strings. In addition, the token __END__ may be used to indicate the
-logical end of the script before the actual end of file. Any following
-text is ignored, but may be read via the DATA filehandle. (The DATA
-filehandle may read data from only the main script, but not from any
-required file or evaluated string.) The two control characters ^D and
-^Z are synonyms for __END__ (or __DATA__ in a module; see L<SelfLoader> for
-details on __DATA__).
+Three special literals are __FILE__, __LINE__, and __PACKAGE__, which
+represent the current filename, line number, and package name at that
+point in your program. They may be used only as separate tokens; they
+will not be interpolated into strings. If there is no current package
+(due to a C<package;> directive), __PACKAGE__ is the undefined value.
+
+The tokens __END__ and __DATA__ may be used to indicate the logical end
+of the script before the actual end of file. Any following text is
+ignored, but may be read via a DATA filehandle: main::DATA for __END__,
+or PACKNAME::DATA (where PACKNAME is the current package) for __DATA__.
+The two control characters ^D and ^Z are synonyms for __END__ (or
+__DATA__ in a module). See L<SelfLoader> for more description of
+__DATA__, and an example of its use.
A word that has no other interpretation in the grammar will
be treated as if it were a quoted string. These are known as
@@ -440,6 +448,11 @@ put the list in parentheses to avoid ambiguity. Examples:
# A "reverse comma operator".
return (pop(@foo),pop(@foo))[0];
+You may assign to C<undef> in a list. This is useful for throwing
+away some of the return values of a function:
+
+ ($dev, $ino, undef, undef, $uid, $gid) = stat($file);
+
Lists may be assigned to if and only if each element of the list
is legal to assign to: