introduce $^U, a global bit to indicate whether system

[p5sagit/p5-mst-13.2.git] / pod / perltie.pod

diff --git a/pod/perltie.pod b/pod/perltie.pod
index 581b4ab..58e9c43 100644 (file)
--- a/pod/perltie.pod
+++ b/pod/perltie.pod
@@ -185,10 +185,12 @@ methods: TIEARRAY, FETCH, STORE, FETCHSIZE, STORESIZE and perhaps DESTROY.
 FETCHSIZE and STORESIZE are used to provide C<$#array> and
 equivalent C<scalar(@array)> access.
     
-The methods POP, PUSH, SHIFT, UNSHIFT, SPLICE are required if the perl
-operator with the corresponding (but lowercase) name is to operate on the
-tied array. The B<Tie::Array> class can be used as a base class to implement
-these in terms of the basic five methods above.  
+The methods POP, PUSH, SHIFT, UNSHIFT, SPLICE, DELETE, and EXISTS are
+required if the perl operator with the corresponding (but lowercase) name
+is to operate on the tied array. The B<Tie::Array> class can be used as a
+base class to implement the first five of these in terms of the basic
+methods above.  The default implementations of DELETE and EXISTS in
+B<Tie::Array> simply C<croak>.
 
 In addition EXTEND will be called when perl would have pre-extended 
 allocation in a real array.
@@ -834,7 +836,7 @@ destructor (DESTROY) is called, which is normal for objects that have
 no more valid references; and thus the file is closed.
 
 In the second example, however, we have stored another reference to
-the tied object in C<$x>.  That means that when untie() gets called
+the tied object in $x.  That means that when untie() gets called
 there will still be a valid reference to the object in existence, so
 the destructor is not called at that time, and thus the file is not
 closed.  The reason there is no output is because the file buffers