=over 8
-=item $<I<digit>>
+=item $E<lt>I<digit>E<gt>
Contains the subpattern from the corresponding set of parentheses in
the last pattern matched, not counting patterns matched in nested
The string preceding whatever was matched by the last successful
pattern match (not counting any matches hidden within a BLOCK or eval
-enclosed by the current BLOCK). (Mnemonic: ` often precedes a quoted
+enclosed by the current BLOCK). (Mnemonic: C<`> often precedes a quoted
string.) This variable is read-only.
=item $POSTMATCH
The string following whatever was matched by the last successful
pattern match (not counting any matches hidden within a BLOCK or eval()
-enclosed by the current BLOCK). (Mnemonic: ' often follows a quoted
+enclosed by the current BLOCK). (Mnemonic: C<'> often follows a quoted
string.) Example:
$_ = 'abcdefghi';
=item $.
The current input line number for the last file handle from
-which you read (or performed a C<seek> or <tell> on). An
+which you read (or performed a C<seek> or C<tell> on). An
explicit close on a filehandle resets the line number. Since
"C<E<lt>E<gt>>" never does an explicit close, line numbers increase
across ARGV files (but see examples under eof()). Localizing C<$.> has
The input record separator, newline by default. Works like B<awk>'s RS
variable, including treating empty lines as delimiters if set to the
-null string. (Note: An empty line can not contain any spaces or
+null string. (Note: An empty line cannot contain any spaces or
tabs.) You may set it to a multicharacter string to match a
multi-character delimiter. Note that setting it to C<"\n\n"> means
something slightly different than setting it to C<"">, if the file
order to get behavior more like B<awk>, set this variable as you would
set B<awk>'s ORS variable to specify what is printed at the end of the
print. (Mnemonic: you set "C<$\>" instead of adding \n at the end of the
-print. Also, it's just like /, but it's what you get "back" from
+print. Also, it's just like C<$/>, but it's what you get "back" from
Perl.)
=item $LIST_SEPARATOR
if any, the process died from, and whether there was a core dump.
(Mnemonic: similar to B<sh> and B<ksh>.)
+Inside an C<END> subroutine C<$?> contains the value that is going to be
+given to C<exit()>. You can modify C<$?> in an C<END> subroutine to
+change the exit status of the script.
+
=item $OS_ERROR
=item $ERRNO
the syntax error "at"?)
Note that warning messages are not collected in this variable. You can,
-however, set up a routine to process warnings by setting $SIG{__WARN__} below.
+however, set up a routine to process warnings by setting C<$SIG{__WARN__}>
+below.
=item $PROCESS_ID
=item $ARGV
-contains the name of the current file when reading from <>.
+contains the name of the current file when reading from E<lt>E<gt>.
=item @ARGV
The one marked scary is problematic because it's a bareword, which means
sometimes it's a string representing the function, and sometimes it's
going to call the subroutine call right then and there! Best to be sure
-and quote it or take a reference to it. *Plumber works too. See L<perlsubs>.
+and quote it or take a reference to it. *Plumber works too. See L<perlsub>.
Certain internal hooks can be also set using the %SIG hash. The
-routine indicated by $SIG{__WARN__} is called when a warning message is
+routine indicated by C<$SIG{__WARN__}> is called when a warning message is
about to be printed. The warning message is passed as the first
argument. The presence of a __WARN__ hook causes the ordinary printing
of warnings to STDERR to be suppressed. You can use this to save warnings
local $SIG{__WARN__} = sub { die $_[0] };
eval $proggie;
-The routine indicated by $SIG{__DIE__} is called when a fatal exception
+The routine indicated by C<$SIG{__DIE__}> is called when a fatal exception
is about to be thrown. The error message is passed as the first
argument. When a __DIE__ hook routine returns, the exception
processing continues as it would have in the absence of the hook,
projects / p5sagit/p5-mst-13.2.git / commitdiff