X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2Ffeature.pm;h=7ffae727fd6cf1e2f5f9c90ea7d1591e60c53f9f;hb=86f0d17ae7d22e132374646440ff37525d8d624b;hp=91e4562ea6f2d09ebd656eb538f1389dd56d55a0;hpb=3e7dd34d07ec3fbcf1e108a3270d6009e068e8eb;p=p5sagit%2Fp5-mst-13.2.git

diff --git a/lib/feature.pm b/lib/feature.pm
index 91e4562..7ffae72 100644
--- a/lib/feature.pm
+++ b/lib/feature.pm
@@ -18,6 +18,8 @@ my %feature_bundle = (
 $feature_bundle{"5.10"} = $feature_bundle{"5.10.0"};
 #$feature_bundle{"5.10"} = $feature_bundle{sprintf("%vd",$^V)};
 
+$feature_bundle{"5.9.5"} = $feature_bundle{"5.10.0"};
+
 # TODO:
 # - think about versioned features (use feature switch => 2)
 
@@ -36,6 +38,8 @@ feature - Perl pragma to enable new syntactic features
 	default		  { say "None of the above" }
     }
 
+    use feature ':5.10'; # loads all features available in perl 5.10
+
 =head1 DESCRIPTION
 
 It is usually impossible to add new syntax to Perl without breaking
@@ -111,6 +115,33 @@ which both are equivalent to C<use feature qw(switch say err state)>.
 In the forthcoming 5.10.X perl releases, C<use feature ":5.10"> will be
 equivalent to the latest C<use feature ":5.10.X">.
 
+=head1 IMPLICIT LOADING
+
+There are two ways to load the C<feature> pragma implicitly :
+
+=over 4
+
+=item *
+
+By using the C<-E> switch on the command-line instead of C<-e>. It enables
+all available features in the main compilation unit (that is, the one-liner.)
+
+=item *
+
+By requiring explicitly a minimal Perl version number for your program, with
+the C<use VERSION> construct, and when the version is higher than or equal to
+5.9.5. That is,
+
+    use 5.9.5;
+
+will do an implicit
+
+    use feature ':5.9.5';
+
+and so on.
+
+=back
+
 =cut
 
 sub import {
@@ -120,11 +151,12 @@ sub import {
     }
     while (@_) {
 	my $name = shift(@_);
-	if ($name =~ /^:(.*)/) {
-	    if (!exists $feature_bundle{$1}) {
-		unknown_feature_bundle($1);
+	if (substr($name, 0, 1) eq ":") {
+	    my $v = substr($name, 1);
+	    if (!exists $feature_bundle{$v}) {
+		unknown_feature_bundle($v);
 	    }
-	    unshift @_, @{$feature_bundle{$1}};
+	    unshift @_, @{$feature_bundle{$v}};
 	    next;
 	}
 	if (!exists $feature{$name}) {
@@ -145,11 +177,12 @@ sub unimport {
 
     while (@_) {
 	my $name = shift;
-	if ($name =~ /^:(.*)/) {
-	    if (!exists $feature_bundle{$1}) {
-		unknown_feature_bundle($1);
+	if (substr($name, 0, 1) eq ":") {
+	    my $v = substr($name, 1);
+	    if (!exists $feature_bundle{$v}) {
+		unknown_feature_bundle($v);
 	    }
-	    unshift @_, @{$feature_bundle{$1}};
+	    unshift @_, @{$feature_bundle{$v}};
 	    next;
 	}
 	if (!exists($feature{$name})) {