(F) The modifiers '!', '<' and '>' are allowed in pack() or unpack() only
after certain types. See L<perlfunc/pack>.
+=item alpha->numify() is lossy
+
+(W numeric) An alpha version can not be numified without losing
+information.
+
=item Ambiguous call resolved as CORE::%s(), qualify as such or use &
(W ambiguous) A subroutine you have declared has the same name as a Perl
(W unopened) You tried chdir() on a filehandle that was never opened.
-=item \C no longer supported in regex; marked by S<<-- HERE> in m/%s/
-
-(F) The \C character class used to allow a match of single byte within a
-multi-byte utf-8 character, but was removed in v5.24 as it broke
-encapsulation and its implementation was extremely buggy. If you really
-need to process the individual bytes, you probably want to convert your
-string to one where each underlying byte is stored as a character, with
-utf8::encode().
-
=item "\c%c" is more clearly written simply as "%s"
(W syntax) The C<\cI<X>> construct is intended to be a way to specify
handler is the prototype that is cloned when a new closure is created.
This subroutine cannot be called.
+=item \C no longer supported in regex; marked by S<<-- HERE> in m/%s/
+
+(F) The \C character class used to allow a match of single byte
+within a multi-byte utf-8 character, but was removed in v5.24 as
+it broke encapsulation and its implementation was extremely buggy.
+If you really need to process the individual bytes, you probably
+want to convert your string to one where each underlying byte is
+stored as a character, with utf8::encode().
+
=item Code missing after '/'
(F) You had a (sub-)template that ends with a '/'. There must be
use feature "refaliasing";
\$x = \$y;
+=item Experimental %s on scalar is now forbidden
+
+(F) An experimental feature added in Perl 5.14 allowed C<each>, C<keys>,
+C<push>, C<pop>, C<shift>, C<splice>, C<unshift>, and C<values> to be called with a
+scalar argument. This experiment is considered unsuccessful, and
+has been removed. The C<postderef> feature may meet your needs better.
+
=item Experimental subroutine signatures not enabled
(F) To use subroutine signatures, you must first enable them:
use feature "signatures";
sub foo ($left, $right) { ... }
-=item Experimental %s on scalar is now forbidden
-
-(F) An experimental feature added in Perl 5.14 allowed C<each>, C<keys>,
-C<push>, C<pop>, C<shift>, C<splice>, C<unshift>, and C<values> to be called
-with a scalar argument. This experiment is considered unsuccessful, and has
-been removed. The C<postderef> feature may meet your needs better.
-
=item Experimental "%s" subs not enabled
(F) To use lexical subs, you must first enable them:
if you're expecting only one subscript. When called in list context,
it also returns the key in addition to the value.
-=item Invalid number '%s' for -C option.
-
-(F) You supplied a number to the -C option that either has extra leading
-zeroes or overflows perl's unsigned integer representation.
-
-=item %s() is deprecated on :utf8 handles
-
-(W deprecated) The sysread(), recv(), syswrite() and send() operators
-are deprecated on handles that have the C<:utf8> layer, either
-explicitly, or implicitly, eg., with the C<:encoding(UTF-16LE)> layer.
-
-Both sysread() and recv() currently use only the C<:utf8> flag for the
-stream, ignoring the actual layers. Since sysread() and recv() do no
-UTF-8 validation they can end up creating invalidly encoded scalars.
-
-Similarly, syswrite() and send() use only the C<:utf8> flag, otherwise
-ignoring any layers. If the flag is set, both write the value UTF-8
-encoded, even if the layer is some different encoding, such as the
-example above.
-
-Ideally, all of these operators would completely ignore the C<:utf8>
-state, working only with bytes, but this would result in silently
-breaking existing code. To avoid this a future version of perl will
-throw an exception when any of sysread(), recv(), syswrite() or send()
-are called on handle with the C<:utf8> layer.
-
=item Insecure dependency in %s
(F) You tried to do something that the tainting mechanism didn't like.
not valid character numbers, so it returns the Unicode replacement
character (U+FFFD).
+=item Invalid number '%s' for -C option.
+
+(F) You supplied a number to the -C option that either has extra leading
+zeroes or overflows perl's unsigned integer representation.
+
=item invalid option -D%c, use -D'' to see choices
(S debugging) Perl was called with invalid debugger flags. Call perl
Perhaps the internals were modified directly in some way or
an arbitrary reference was blessed into the "version" class.
-=item alpha->numify() is lossy
-
-(W numeric) An alpha version can not be numified without losing information.
-
=item In '(*VERB...)', the '(' and '*' must be adjacent in regex;
marked by S<<-- HERE> in m/%s/
Perl. The current valid ones are given in
L<perlrebackslash/\b{}, \b, \B{}, \B>.
+=item %s() is deprecated on :utf8 handles
+
+(W deprecated) The sysread(), recv(), syswrite() and send() operators are
+deprecated on handles that have the C<:utf8> layer, either explicitly, or
+implicitly, eg., with the C<:encoding(UTF-16LE)> layer.
+
+Both sysread() and recv() currently use only the C<:utf8> flag for the stream,
+ignoring the actual layers. Since sysread() and recv() do no UTF-8
+validation they can end up creating invalidly encoded scalars.
+
+Similarly, syswrite() and send() use only the C<:utf8> flag, otherwise ignoring
+any layers. If the flag is set, both write the value UTF-8 encoded, even if
+the layer is some different encoding, such as the example above.
+
+Ideally, all of these operators would completely ignore the C<:utf8> state,
+working only with bytes, but this would result in silently breaking existing
+code. To avoid this a future version of perl will throw an exception when
+any of sysread(), recv(), syswrite() or send() are called on handle with the
+C<:utf8> layer.
+
=item "%s" is more clearly written simply as "%s" in regex; marked by S<<-- HERE> in m/%s/
(W regexp) (only under C<S<use re 'strict'>> or within C<(?[...])>)
(F) The end of the perl code contained within the {...} must be
followed immediately by a ')'.
-=item Sequence ?P=... not terminated in regex; marked by S<<-- HERE> in
-m/%s/
+=item Sequence (?PE<gt>... not terminated in regex; marked by S<<-- HERE> in m/%s/
-(F) A named reference of the form C<(?P=...)> was missing the final
+(F) A named reference of the form C<(?PE<gt>...)> was missing the final
closing parenthesis after the name. The S<<-- HERE> shows whereabouts
in the regular expression the problem was discovered.
closing angle bracket. The S<<-- HERE> shows whereabouts in the
regular expression the problem was discovered.
-=item Sequence (?PE<gt>... not terminated in regex; marked by S<<-- HERE> in m/%s/
+=item Sequence ?P=... not terminated in regex; marked by S<<-- HERE> in
+m/%s/
-(F) A named reference of the form C<(?PE<gt>...)> was missing the final
+(F) A named reference of the form C<(?P=...)> was missing the final
closing parenthesis after the name. The S<<-- HERE> shows whereabouts
in the regular expression the problem was discovered.
with your single-byte locale (or perhaps you thought you had a UTF-8
locale, but Perl disagrees).
-=item %s() with negative argument
-
-(S misc) Certain operations make no sense with negative arguments.
-Warning is given and the operation is not done.
-
=item Within []-length '%c' not allowed
(F) The count in the (un)pack template may be replaced by C<[TEMPLATE]>
it contains any of the codes @, /, U, u, w or a *-length. Redesign
the template.
+=item %s() with negative argument
+
+(S misc) Certain operations make no sense with negative arguments.
+Warning is given and the operation is not done.
+
=item write() on closed filehandle %s
(W closed) The filehandle you're writing to got itself closed sometime
https://perl5.git.perl.org / perl5.git / commitdiff