diff options
Diffstat (limited to 'pod/perl5111delta.pod')
| -rw-r--r-- | pod/perl5111delta.pod | 76 |
1 files changed, 28 insertions, 48 deletions
diff --git a/pod/perl5111delta.pod b/pod/perl5111delta.pod index 6eb6d9de79..d6f2f9011d 100644 --- a/pod/perl5111delta.pod +++ b/pod/perl5111delta.pod @@ -22,60 +22,45 @@ the 5.11.1 release. =head2 Add C<package NAME VERSION> syntax - This patch adds support for setting the $VERSION of a namespace - when the namespace is declared with 'package'. It eliminates the - need for 'our $VERSION = ...' and similar constructs. E.g. +This new syntax allows a module author to set the $VERSION of a namespace +when the namespace is declared with 'package'. It eliminates the need +for C<our $VERSION = ...> and similar constructs. E.g. package Foo::Bar 1.23; # $Foo::Bar::VERSION == 1.23 - There are several advantages to this: +There are several advantages to this: - * VERSION is parsed in *exactly* the same way as 'use NAME VERSION' +=item * - * $VERSION is set at compile time +C<$VERSION> is parsed in I<exactly> the same way as C<use NAME VERSION> - * Eliminates '$VERSION = ...' and 'eval $VERSION' clutter +=item * - * As it requires VERSION to be a numeric literal or v-string - literal, it can be statically parsed by toolchain modules - without 'eval' the way MM->parse_version does for '$VERSION = ...' +C<$VERSION> is set at compile time - * Alpha versions with underscores do not need to be quoted; static - parsing will preserve the underscore, but during compilation, Perl - will remove underscores as it does for all numeric literals +=item * - During development of this, there was discussion on #corehackers and - elsewhere that this should also allow other metadata to be set such as - "status" (stable/alpha) or "author/authority". On reflection, those - metadata are not very well defined yet and likely should never be - encoded into Perl core parsing so they can be freely changed in the - future. (They could perhaps be achieved via a comment on the same line - as 'package NAME VERSION'.) +Eliminates C<$VERSION = ...> and C<eval $VERSION> clutter - Version numbers, however, already have a very specific definition and - use defined in the core through 'use NAME VERSION'. This patch merely - provides appropriate symmetry for setting $VERSION with the exact same - parsing and semantics as 'use'. +=item * - It does not break old code with only 'package NAME', but code that - uses 'package NAME VERSION' will need to be restricted to perl 5.11.X. - This is analogous to the change to open() from two-args to three-args. - Users requiring the latest Perl will benefit, and perhaps N years from - now it will become standard practice when Perl 5.12 is targeted the - way that 5.6 is today. +As it requires VERSION to be a numeric literal or v-string +literal, it can be statically parsed by toolchain modules +without 'eval' the way MM->parse_version does for '$VERSION = ...' - The patch does not prevent 'package NAME VERSION' from being used - multiple times for the same package with different version numbers, but - nothing prevents $VERSION from being modified arbitrarily at runtime, - either, so I see no urgen reason to add limitations or warnings so - long as Perl uses a global $VERSION variable for package version - numbers. +=item * - I am posting this patch to the p5p list for discussion and review. If - there seems to be general assent (or lack of dissent), I will go ahead - and commit the patch to blead. +Alpha versions with underscores do not need to be quoted; static +parsing will preserve the underscore, but during compilation, Perl +will remove underscores as it does for all numeric literals +It does not break old code with only 'package NAME', but code that uses +'package NAME VERSION' will need to be restricted to perl 5.11.X or newer +This is analogous to the change to open() from two-args to three-args. +Users requiring the latest Perl will benefit, and perhaps N years from +now it will become standard practice when Perl 5.12 is targeted the way +that 5.6 is today. =head1 Modules and Pragmata @@ -97,11 +82,11 @@ the 5.11.1 release. =item Upgrade to CGI.pm-3.48 -=item Update CPANPLUS to CPAN version 0.89_02 +=item Upgrade CPANPLUS to CPAN version 0.89_02 =item Upgrade to threads::shared 1.32 -=item Update ExtUtils::ParseXS to 2.21 +=item Upgrade ExtUtils::ParseXS to 2.21 =item Upgrade File::Path to 2.08 (and add taint.t test) @@ -135,12 +120,7 @@ the 5.11.1 release. =back -=head1 Installation and Configuration Improvements - -XXX Changes to F<Configure>, F<installperl>, F<installman>, and analogous tools -go here. - -=head2 Platform Specific Changes +=head1 Platform Specific Notes =over 4 @@ -247,7 +227,7 @@ With luck, that'll be sorted out for 5.11.2 =back -=head1 Errata +=head1 Errata for 5.11.0 =over |