Bump copyright year

[perl/modules/Scope-Context.git] / lib / Scope / Context.pm

diff --git a/lib/Scope/Context.pm b/lib/Scope/Context.pm
index 4a45cbb540c61f2b7b60a2d0e2e0d587b07be42d..8fafca8b5a3e8ed92217088cb4f1a0c7de30ccae 100644 (file)
--- a/lib/Scope/Context.pm
+++ b/lib/Scope/Context.pm
@@ -8,7 +8,7 @@ use warnings;
 use Carp         ();
 use Scalar::Util ();
 
-use Scope::Upper 0.18 ();
+use Scope::Upper 0.21 ();
 
 =head1 NAME
 
@@ -92,7 +92,7 @@ will croak when L</reap> is called.
     my $cxt = Scope::Context->new;
     my $cxt = Scope::Context->new($scope_upper_cxt);
 
-Creates a new immutable L<Scope::Context> object from the L<Scope::Upper>-comptabile context C<$context>.
+Creates a new immutable L<Scope::Context> object from the L<Scope::Upper>-comptabile context identifier C<$context>.
 If omitted, C<$context> defaults to the current context.
 
 =cut
@@ -133,13 +133,13 @@ sub _croak {
 
     my $scope_upper_cxt = $cxt->cxt;
 
-Read-only accessor to the L<Scope::Upper> context corresponding to the topic L<Scope::Context> object.
+Read-only accessor to the L<Scope::Upper> context identifier associated with the invocant.
 
 =head2 C<uid>
 
     my $uid = $cxt->uid;
 
-Read-only accessor to the L<Scope::Upper> UID of the topic L<Scope::Context> object.
+Read-only accessor to the L<Scope::Upper> unique identifier representing the L<Scope::Upper> context associated with the invocant.
 
 =cut
 
@@ -171,7 +171,7 @@ use overload (
 
     my $is_valid = $cxt->is_valid;
 
-Returns true if and only if the topic context is still valid (that is, it designates a scope that is higher than the topic context in the call stack).
+Returns true if and only if the invocant is still valid (that is, it designates a scope that is higher on the call stack than the current scope).
 
 =cut
 
@@ -181,7 +181,7 @@ sub is_valid { Scope::Upper::validate_uid($_[0]->uid) }
 
     $cxt->assert_valid;
 
-Throws an exception if the topic context has expired and is no longer valid.
+Throws an exception if the invocant has expired and is no longer valid.
 Returns true otherwise.
 
 =cut
@@ -198,7 +198,7 @@ sub assert_valid {
 
     my $want = $cxt->want;
 
-Returns the Perl context (in the sense of C<wantarray> : C<undef> for void context, C<''> for scalar context, and true for list context) in which is executed the scope corresponding to the topic L<Scope::Context> object.
+Returns the Perl context (in the sense of C<wantarray> : C<undef> for void context, C<''> for scalar context, and true for list context) in which is executed the scope pointed by the invocant.
 
 =cut
 
@@ -216,9 +216,9 @@ sub want {
     my $up_cxt = $cxt->up($frames);
     my $up_cxt = Scope::Context->up;
 
-Returns a new L<Scope::Context> object pointing to the C<$frames>-th upper scope above the topic context.
+Returns a new L<Scope::Context> object pointing to the C<$frames>-th upper scope above the scope pointed by the invocant.
 
-This method can also be invoked as a class method, in which case it is equivalent to calling L</up> on a L<Scope::Context> object for the current context.
+This method can also be invoked as a class method, in which case it is equivalent to calling L</up> on a L<Scope::Context> object representing the current context.
 
 If omitted, C<$frames> defaults to C<1>.
 
@@ -236,15 +236,16 @@ If omitted, C<$frames> defaults to C<1>.
 sub up {
  my ($self, $frames) = @_;
 
+ my $cxt;
  if (Scalar::Util::blessed($self)) {
   $self->assert_valid;
+  $cxt = $self->cxt;
  } else {
-  $self = $self->new(Scope::Upper::UP(Scope::Upper::SUB()));
+  $cxt = Scope::Upper::UP(Scope::Upper::SUB());
  }
 
  $frames = 1 unless defined $frames;
 
- my $cxt = $self->cxt;
  $cxt = Scope::Upper::UP($cxt) for 1 .. $frames;
 
  $self->new($cxt);
@@ -256,11 +257,11 @@ sub up {
     my $sub_cxt = $cxt->sub($frames);
     my $sub_cxt = Scope::Context->sub;
 
-Returns a new L<Scope::Context> object pointing to the C<$frames>-th subroutine scope above the topic context.
+Returns a new L<Scope::Context> object pointing to the C<$frames>-th subroutine scope above the scope pointed by the invocant.
 
 This method can also be invoked as a class method, in which case it is equivalent to calling L</sub> on a L<Scope::Context> object for the current context.
 
-If omitted, C<$frames> defaults to C<0>, which results in the closest sub enclosing the topic context.
+If omitted, C<$frames> defaults to C<0>, which results in the closest sub enclosing the scope pointed by the invocant.
 
     outer();
 
@@ -278,15 +279,17 @@ If omitted, C<$frames> defaults to C<0>, which results in the closest sub enclos
 sub sub {
  my ($self, $frames) = @_;
 
+ my $cxt;
  if (Scalar::Util::blessed($self)) {
   $self->assert_valid;
+  $cxt = $self->cxt;
  } else {
-  $self = $self->new(Scope::Upper::UP(Scope::Upper::SUB()));
+  $cxt = Scope::Upper::UP(Scope::Upper::SUB());
  }
 
  $frames = 0 unless defined $frames;
 
- my $cxt = Scope::Upper::SUB($self->cxt);
+ $cxt = Scope::Upper::SUB($cxt);
  $cxt = Scope::Upper::SUB(Scope::Upper::UP($cxt)) for 1 .. $frames;
 
  $self->new($cxt);
@@ -298,11 +301,11 @@ sub sub {
     my $eval_cxt = $cxt->eval($frames);
     my $eval_cxt = Scope::Context->eval;
 
-Returns a new L<Scope::Context> object pointing to the C<$frames>-th C<eval> scope above the topic context.
+Returns a new L<Scope::Context> object pointing to the C<$frames>-th C<eval> scope above the scope pointed by the invocant.
 
 This method can also be invoked as a class method, in which case it is equivalent to calling L</eval> on a L<Scope::Context> object for the current context.
 
-If omitted, C<$frames> defaults to C<0>, which results in the closest eval enclosing the topic context.
+If omitted, C<$frames> defaults to C<0>, which results in the closest eval enclosing the scope pointed by the invocant.
 
     eval {
      sub {
@@ -316,15 +319,17 @@ If omitted, C<$frames> defaults to C<0>, which results in the closest eval enclo
 sub eval {
  my ($self, $frames) = @_;
 
+ my $cxt;
  if (Scalar::Util::blessed($self)) {
   $self->assert_valid;
+  $cxt = $self->cxt;
  } else {
-  $self = $self->new(Scope::Upper::UP(Scope::Upper::SUB()));
+  $cxt = Scope::Upper::UP(Scope::Upper::SUB());
  }
 
  $frames = 0 unless defined $frames;
 
- my $cxt = Scope::Upper::EVAL($self->cxt);
+ $cxt = Scope::Upper::EVAL($cxt);
  $cxt = Scope::Upper::EVAL(Scope::Upper::UP($cxt)) for 1 .. $frames;
 
  $self->new($cxt);
@@ -334,7 +339,7 @@ sub eval {
 
     $cxt->reap($code);
 
-Execute C<$code> when the topic context ends.
+Execute C<$code> when the scope pointed by the invocant ends.
 
 See L<Scope::Upper/reap> for details.
 
@@ -352,7 +357,7 @@ sub reap {
 
     $cxt->localize($what, $value);
 
-Localize the variable described by C<$what> to the value C<$value> when the control flow returns to the scope pointed by the topic context.
+Localize the variable described by C<$what> to the value C<$value> when the control flow returns to the scope pointed by the invocant.
 
 See L<Scope::Upper/localize> for details.
 
@@ -370,7 +375,7 @@ sub localize {
 
     $cxt->localize_elem($what, $key, $value);
 
-Localize the element C<$key> of the variable C<$what> to the value C<$value> when the control flow returns to the scope pointed by the topic context.
+Localize the element C<$key> of the variable C<$what> to the value C<$value> when the control flow returns to the scope pointed by the invocant.
 
 See L<Scope::Upper/localize_elem> for details.
 
@@ -388,7 +393,7 @@ sub localize_elem {
 
     $cxt->localize_delete($what, $key);
 
-Delete the element C<$key> from the variable C<$what> when the control flow returns to the scope pointed by the topic context.
+Delete the element C<$key> from the variable C<$what> when the control flow returns to the scope pointed by the invocant.
 
 See L<Scope::Upper/localize_delete> for details.
 
@@ -406,7 +411,7 @@ sub localize_delete {
 
     $cxt->unwind(@values);
 
-Immediately returns the scalars listed in C<@values> from the closest subroutine enclosing the topic context.
+Immediately returns the scalars listed in C<@values> from the closest subroutine enclosing the scope pointed by the invocant.
 
 See L<Scope::Upper/unwind> for details.
 
@@ -420,11 +425,29 @@ sub unwind {
  Scope::Upper::unwind(@_ => $self->cxt);
 }
 
+=head2 C<yield>
+
+    $cxt->yield(@values);
+
+Immediately returns the scalars listed in C<@values> from the scope pointed by the invocant, whatever it may be (except a substitution eval context).
+
+See L<Scope::Upper/yield> for details.
+
+=cut
+
+sub yield {
+ my $self = shift;
+
+ $self->assert_valid;
+
+ Scope::Upper::yield(@_ => $self->cxt);
+}
+
 =head2 C<uplevel>
 
     my @ret = $cxt->uplevel($code, @args);
 
-Executes the code reference C<$code> with arguments C<@args> in the same setting as the closest subroutine enclosing the topic context, then returns to the current scope the values returned by C<$code>.
+Executes the code reference C<$code> with arguments C<@args> in the same setting as the closest subroutine enclosing the scope pointed by the invocant, then returns to the current scope the values returned by C<$code>.
 
 See L<Scope::Upper/uplevel> for details.
 
@@ -443,7 +466,7 @@ sub uplevel {
 
 L<Carp> (core module since perl 5), L<Scalar::Util> (since 5.7.3).
 
-L<Scope::Upper> 0.18.
+L<Scope::Upper> 0.21.
 
 =head1 SEE ALSO
 
@@ -470,7 +493,7 @@ You can find documentation for this module with the perldoc command.
 
 =head1 COPYRIGHT & LICENSE
 
-Copyright 2011 Vincent Pit, all rights reserved.
+Copyright 2011,2012,2013 Vincent Pit, all rights reserved.
 
 This program is free software; you can redistribute it and/or modify it
 under the same terms as Perl itself.