Author: lwall
Date: 2009-11-09 19:50:13 +0100 (Mon, 09 Nov 2009)
New Revision: 29037
Modified:
docs/Perl6/Spec/S02-bits.pod
Log:
[S02] clean up ::() semantics to be identical to normal lookup
Modified: docs/Perl6/Spec/S02-bits.pod
===================================================================
--- docs/Perl6/Spec/S02-bits.pod 2009-11-09 18:03:37 UTC (rev 29036)
+++ docs/Perl6/Spec/S02-bits.pod 2009-11-09 18:50:13 UTC (rev 29037)
@@ -13,8 +13,8 @@
Created: 10 Aug 2004
- Last Modified: 27 Oct 2009
- Version: 186
+ Last Modified: 09 Nov 2009
+ Version: 187
This document summarizes Apocalypse 2, which covers small-scale
lexical items and typological issues. (These Synopses also contain
@@ -2140,19 +2140,24 @@
$foo = "Bar";
$foobar = "Foo::Bar";
- $::($foo) # package-scoped $Bar
+ $::($foo) # lexically-scoped $Bar
$::("MY::$foo") # lexically-scoped $Bar
- $::("*::$foo") # global $Bar
+ $::("OUR::$foo") # package-scoped $Bar
+ $::("GLOBAL::$foo") # global $Bar
+ $::("PROCESS::$foo")# process $Bar
+ $::("PARENT::$foo") # current package's parent's $Bar
$::($foobar) # $Foo::Bar
$::($foobar)::baz # $Foo::Bar::baz
$::($foo)::Bar::baz # $Bar::Bar::baz
$::($foobar)baz # ILLEGAL at compile time (no operator baz)
Note that unlike in Perl 5, initial C<::> doesn't imply global.
-Package names are searched for from inner lexical scopes to outer,
-then from inner packages to outer. Variable names are searched
-for from inner lexical scopes to outer, but unlike package names
-are looked for in only the current package.
+Here as part of the interpolation syntax it doesn't even imply package.
+After the interpolation of the C<::()> component, the indirect name
+is looked up exactly as if it had been there in the original source
+code, with priority given first to leading pseudo-package names,
+then to names in the lexical scope (searching scopes outwards, ending
+at C<CORE>). The current package is searched last.
Use the C<MY> pseudopackage to limit the lookup to the current lexical
scope, and C<OUR> to limit the scopes to the current package scope.
