Add "state" feature

p4raw-id: //depot/perl@28087

diff --git a/lib/feature.pm b/lib/feature.pm
index d4975e4..240d46d 100644 (file)
--- a/lib/feature.pm
+++ b/lib/feature.pm
@@ -1,6 +1,6 @@
 package feature;
 
-our $VERSION = '1.00';
+our $VERSION = '1.01';
 
 # (feature name) => (internal name, used in %^H)
 my %feature = (
@@ -8,10 +8,11 @@ my %feature = (
     "~~"   => "feature_~~",
     say    => "feature_say",
     err    => "feature_err",
+    state  => "feature_state",
 );
 
 my %feature_bundle = (
-    "5.10" => [qw(switch ~~ say err)],
+    "5.10" => [qw(switch ~~ say err state)],
 );
 
 
@@ -81,13 +82,18 @@ operator from here to the end of the enclosing BLOCK.
 C<err> is a low-precedence variant of the C<//> operator:
 see C<perlop> for details.
 
+=head2 the 'state' feature
+
+C<use feature 'state'> tells the compiler to enable C<state>
+variables from here to the end of the enclosing BLOCK.
+
 =head1 FEATURE BUNDLES
 
 It's possible to load a whole slew of features in one go, using
 a I<feature bundle>. The name of a feature bundle is prefixed with
 a colon, to distinguish it from an actual feature. At present, the
 only feature bundle is C<use feature ":5.10">, which is equivalent
-to C<use feature qw(switch ~~ say err)>.
+to C<use feature qw(switch ~~ say err state)>.
 
 =cut
 

diff --git a/perl_keyword.pl b/perl_keyword.pl
index 636f6a9..b2e9e34 100644 (file)
--- a/perl_keyword.pl
+++ b/perl_keyword.pl
@@ -45,6 +45,8 @@ my %feature_kw = (
        say     => 'say',
 
        err     => 'err',
+
+       state   => 'state',
        );
 
 my %pos = map { ($_ => 1) } @pos;

diff --git a/t/op/state.t b/t/op/state.t
index 987cf6e..3b68879 100644 (file)
--- a/t/op/state.t
+++ b/t/op/state.t
@@ -7,6 +7,7 @@ BEGIN {
 }
 
 use strict;
+use feature "state";
 
 plan tests => 19;
 

diff --git a/toke.c b/toke.c
index 3700e34..23f801e 100644 (file)
--- a/toke.c
+++ b/toke.c
@@ -8144,7 +8144,7 @@ Perl_keyword (pTHX_ const char *name, I32 len)
                   if (name[3] == 't' &&
                       name[4] == 'e')
                   {                               /* state      */
-                    return KEY_state;
+                    return (FEATURE_IS_ENABLED("state") ? KEY_state : 0);
                   }
 
                   goto unknown;