diff options
Diffstat (limited to 'regen/feature.pl')
| -rwxr-xr-x | regen/feature.pl | 29 |
1 files changed, 17 insertions, 12 deletions
diff --git a/regen/feature.pl b/regen/feature.pl index a7b6e5de29..85ab2b034b 100755 --- a/regen/feature.pl +++ b/regen/feature.pl @@ -60,7 +60,7 @@ my %feature_bundle = ( "5.21" => [qw(say state switch unicode_strings unicode_eval evalbytes current_sub fc)], "5.23" => [qw(say state switch unicode_strings unicode_eval - evalbytes current_sub fc postderef postderef_qq)], + evalbytes current_sub fc postderef_qq)], ); # not actually used currently @@ -575,26 +575,31 @@ This feature is available from Perl 5.18 onwards. =head2 The 'postderef' and 'postderef_qq' features -The 'postderef' feature allows the use of L<postfix dereference -syntax|perlref/Postfix Dereference Syntax>. For example, it will make the -following two statements equivalent: +The 'postderef_qq' feature extends the applicability of L<postfix +dereference syntax|perlref/Postfix Dereference Syntax> so that postfix array +and scalar dereference are available in double-quotish interpolations. For +example, it makes the following two statements equivalent: - my @x = @{ $h->{a} }; - my @x = $h->{a}->@*; + my $s = "[@{ $h->{a} }]"; + my $s = "[$h->{a}->@*]"; -The 'postderef_qq' feature extends this, for array and scalar dereference, to -working inside of double-quotish interpolations. - -These features are available from Perl 5.20 onwards. In Perl 5.20 and 5.22, -they were classed as experimental, and Perl emitted a warning for their +This feature is available from Perl 5.20 onwards. In Perl 5.20 and 5.22, it +was classed as experimental, and Perl emitted a warning for its usage, except when explicitly disabled: no warnings "experimental::postderef"; -As of Perl 5.24, use of these features no longer triggers a warning, though +As of Perl 5.24, use of this feature no longer triggers a warning, though the C<experimental::postderef> warning category still exists (for compatibility with code that disables it). +The 'postderef' feature was used in Perl 5.20 and Perl 5.22 to enable +postfix dereference syntax outside double-quotish interpolations. In those +versions, using it triggered the C<experimental::postderef> warning in the +same way as the 'postderef_qq' feature did. As of Perl 5.24, this syntax is +not only no longer experimental, but it is enabled for all Perl code, +regardless of what feature declarations are in scope. + =head2 The 'signatures' feature B<WARNING>: This feature is still experimental and the implementation may |