Front page | perl.perl5.porters |
Postings from April 2017
[perl #131166] Error in documentation on "perldata"
From:
Wolf-Dietrich Moeller
Date:
April 23, 2017 03:54
Subject:
[perl #131166] Error in documentation on "perldata"
Message ID:
rt-4.0.24-7465-1492431465-850.131166-75-0@perl.org
# New Ticket Created by Wolf-Dietrich Moeller
# Please include the string: [perl #131166]
# in the subject line of all future correspondence about this issue.
# <URL: https://rt.perl.org/Ticket/Display.html?id=131166 >
This is a bug report for perl from wolf-dietrich_moeller@t-online.de,
generated with the help of perlbug 1.40 running under perl 5.24.1.
-----------------------------------------------------------------
[Please describe your issue here]
The documentation "perldata" reads in the section on "Scalar values" the
following:
"If you evaluate a hash in scalar context, it returns false if the hash is
empty. ..."
This statement not completely true.
- It is true if evaluated in Boolean context, e.g. in "if ( %hash )".
- But if used in scalar context expecting a string (e.g. 'n='.%hash), it
returns "0",
and not the empty string, which would be expected for a result = "false".
So the sentence cited above should read:
"If you evaluate a hash in scalar context, it returns 0 if the hash is
empty. ..."
[Please do not change anything below this line]
-----------------------------------------------------------------
---
Flags:
category=docs
severity=low
---
Site configuration information for perl 5.24.1:
Configured by strawberry-perl at Sun Jan 15 20:30:58 2017.
Summary of my perl5 (revision 5 version 24 subversion 1) configuration:
Platform:
osname=MSWin32, osvers=6.3, archname=MSWin32-x86-multi-thread-64int
uname='Win32 strawberry-perl 5.24.1.1 #1 Sun Jan 15 20:28:53 2017 i386'
config_args='undef'
hint=recommended, useposix=true, d_sigaction=undef
useithreads=define, usemultiplicity=define
use64bitint=define, use64bitall=undef, uselongdouble=undef
usemymalloc=n, bincompat5005=undef
Compiler:
cc='gcc', ccflags =' -s -O2 -DWIN32 -DPERL_TEXTMODE_SCRIPTS
-DPERL_IMPLICIT_CONTEXT -DPERL_IMPLICIT_SYS -fwrapv -fno-strict-aliasing
-mms-bitfields',
optimize='-s -O2',
cppflags='-DWIN32'
ccversion='', gccversion='4.9.2', gccosandvers=''
intsize=4, longsize=4, ptrsize=4, doublesize=8, byteorder=12345678,
doublekind=3
d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=12,
longdblkind=3
ivtype='long long', ivsize=8, nvtype='double', nvsize=8, Off_t='long
long', lseeksize=8
alignbytes=8, prototype=define
Linker and Libraries:
ld='g++', ldflags ='-s -L"C:\Perl\perl\lib\CORE" -L"C:\Perl\c\lib"'
libpth=C:\Perl\c\lib C:\Perl\c\i686-w64-mingw32\lib
C:\Perl\c\lib\gcc\i686-w64-mingw32\4.9.2
libs=-lmoldname -lkernel32 -luser32 -lgdi32 -lwinspool -lcomdlg32
-ladvapi32 -lshell32 -lole32 -loleaut32 -lnetapi32 -luuid -lws2_32 -lmpr
-lwinmm -lversion -lodbc32 -lodbccp32 -lcomctl32
perllibs=-lmoldname -lkernel32 -luser32 -lgdi32 -lwinspool -lcomdlg32
-ladvapi32 -lshell32 -lole32 -loleaut32 -lnetapi32 -luuid -lws2_32 -lmpr
-lwinmm -lversion -lodbc32 -lodbccp32 -lcomctl32
libc=, so=dll, useshrplib=true, libperl=libperl524.a
gnulibc_version=''
Dynamic Linking:
dlsrc=dl_win32.xs, dlext=xs.dll, d_dlsymun=undef, ccdlflags=' '
cccdlflags=' ', lddlflags='-mdll -s -L"C:\Perl\perl\lib\CORE"
-L"C:\Perl\c\lib"'
---
@INC for perl 5.24.1:
C:/Perl/perl/site/lib
C:/Perl/perl/vendor/lib
C:/Perl/perl/lib
---
Environment for perl 5.24.1:
HOME (unset)
LANG (unset)
LANGUAGE (unset)
LD_LIBRARY_PATH (unset)
LOGDIR (unset)
PATH=C:\Documents and Settings\All Users\Application
Data\Oracle\Java\javapath;C:\Program Files\Perl\site\bin;C:\Program
Files\Perl\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\Pr
ogram Files\Windows
Imaging\;C:\WINDOWS\system32\WindowsPowerShell\v1.0;C:\Bin;C:\Program
Files\QuickTime
Alternative\QTSystem;C:\Perl\c\bin;C:\Perl\perl\site\bin;C:\Perl\perl\bin
PERL_BADLANG (unset)
SHELL (unset)
-
[perl #131166] Error in documentation on "perldata"
by Wolf-Dietrich Moeller