X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=pod%2Fperlvar.pod;h=c3adfa0a1008f4f8c41bbc904e797f556ac82828;hb=53ae2428795d0b9d42a1657c22c5f1b557784379;hp=b4db654178842ec08e17154e26335770b567a55b;hpb=cde0cee5716418bb58782f073048ee9685ed2368;p=p5sagit%2Fp5-mst-13.2.git

diff --git a/pod/perlvar.pod b/pod/perlvar.pod
index b4db654..c3adfa0 100644
--- a/pod/perlvar.pod
+++ b/pod/perlvar.pod
@@ -234,7 +234,7 @@ X<${^MATCH}>
 This is similar to C<$&> (C<$POSTMATCH>) except that it does not incur the
 performance penalty associated with that variable, and is only guaranteed
 to return a defined value when the pattern was compiled or executed with
-the C</k> modifier.
+the C</p> modifier.
 
 =item $PREMATCH
 
@@ -257,7 +257,7 @@ X<${^PREMATCH}>
 This is similar to C<$`> ($PREMATCH) except that it does not incur the
 performance penalty associated with that variable, and is only guaranteed
 to return a defined value when the pattern was compiled or executed with
-the C</k> modifier.
+the C</p> modifier.
 
 =item $POSTMATCH
 
@@ -286,7 +286,7 @@ X<${^POSTMATCH}>
 This is similar to C<$'> (C<$POSTMATCH>) except that it does not incur the
 performance penalty associated with that variable, and is only guaranteed
 to return a defined value when the pattern was compiled or executed with
-the C</k> modifier.
+the C</p> modifier.
 
 =item $LAST_PAREN_MATCH
 
@@ -344,17 +344,20 @@ Similar to C<@+>, the C<%+> hash allows access to the named capture
 buffers, should they exist, in the last successful match in the
 currently active dynamic scope.
 
-C<$+{foo}> is equivalent to C<$1> after the following match:
+For example, C<$+{foo}> is equivalent to C<$1> after the following match:
 
-  'foo'=~/(?<foo>foo)/;
+  'foo' =~ /(?<foo>foo)/;
 
-The underlying behaviour of %+ is provided by the L<re::Tie::Hash::NamedCapture>
-module.
+The keys of the C<%+> hash list only the names of buffers that have
+captured (and that are thus associated to defined values).
 
-B<Note:> As C<%-> and C<%+> are tied views into a common internal hash
+The underlying behaviour of C<%+> is provided by the
+L<Tie::Hash::NamedCapture> module.
+
+B<Note:> C<%-> and C<%+> are tied views into a common internal hash
 associated with the last successful regular expression. Therefore mixing
 iterative access to them via C<each> may have unpredictable results.
-Likewise, if the last successful match changes then the results may be
+Likewise, if the last successful match changes, then the results may be
 surprising.
 
 =item HANDLE->input_line_number(EXPR)
@@ -615,16 +618,20 @@ After a match against some variable $var:
 =item %-
 X<%->
 
-Similar to %+, this variable allows access to the named capture
-buffers that were defined in the last successful match. It returns
-a reference to an array containing one value per buffer of a given
-name in the pattern.
+Similar to C<%+>, this variable allows access to the named capture buffers
+in the last successful match in the currently active dynamic scope. To
+each capture buffer name found in the regular expression, it associates a
+reference to an array containing the list of values captured by all
+buffers with that name (should there be several of them), in the order
+where they appear.
+
+Here's an example:
 
-    if ('1234'=~/(?<A>1)(?<B>2)(?<A>3)(?<B>4)/) {
-        foreach my $name (sort keys(%-)) {
-            my $ary = $-{$name};
+    if ('1234' =~ /(?<A>1)(?<B>2)(?<A>3)(?<B>4)/) {
+        foreach my $bufname (sort keys %-) {
+            my $ary = $-{$bufname};
             foreach my $idx (0..$#$ary) {
-                print "\$-{$name}[$idx] : ",
+                print "\$-{$bufname}[$idx] : ",
                       (defined($ary->[$idx]) ? "'$ary->[$idx]'" : "undef"),
                       "\n";
             }
@@ -638,12 +645,16 @@ would print out:
     $-{B}[0] : '2'
     $-{B}[1] : '4'
 
-The behaviour of %- is implemented via the L<re::Tie::Hash::NamedCapture> module.
+The keys of the C<%-> hash correspond to all buffer names found in
+the regular expression.
+
+The behaviour of C<%-> is implemented via the
+L<Tie::Hash::NamedCapture> module.
 
-Note that C<%-> and C<%+> are tied views into a common internal hash
+B<Note:> C<%-> and C<%+> are tied views into a common internal hash
 associated with the last successful regular expression. Therefore mixing
 iterative access to them via C<each> may have unpredictable results.
-Likewise, if the last successful match changes then the results may be
+Likewise, if the last successful match changes, then the results may be
 surprising.
 
 =item HANDLE->format_name(EXPR)
@@ -1036,7 +1047,7 @@ X<$^C> X<$COMPILING>
 The current value of the flag associated with the B<-c> switch.
 Mainly of use with B<-MO=...> to allow code to alter its behavior
 when being compiled, such as for example to AUTOLOAD at compile
-time rather than normal, deferred loading.  See L<perlcc>.  Setting
+time rather than normal, deferred loading.  Setting
 C<$^C = 1> is similar to calling C<B::minus_c>.
 
 =item $DEBUGGING
@@ -1299,7 +1310,7 @@ The revision, version, and subversion of the Perl interpreter, represented
 as a string composed of characters with those ordinals.  Thus in Perl v5.6.0
 it equals C<chr(5) . chr(6) . chr(0)> and will return true for
 C<$^V eq v5.6.0>.  Note that the characters in this string value can
-potentially be in Unicode range.
+potentially be greater than 255.
 
 This variable first appeared in perl 5.6.0; earlier versions of perl will
 see an undefined value.