Correct 'map' documentation to reflect operation on a list.

[perl5.git] / pod / perlguts.pod

diff --git a/pod/perlguts.pod b/pod/perlguts.pod
index cd843a0..03e1610 100644 (file)
--- a/pod/perlguts.pod
+++ b/pod/perlguts.pod
@@ -2674,6 +2674,20 @@ whatever the compiler has.
 If you are printing addresses of pointers, use UVxf combined
 with PTR2UV(), do not use %lx or %p.
 
+=head2 Formatted Printing of Size_t and SSize_t
+
+The most general way to do this is to cast them to a UV or IV, and
+print as in the
+L<previous section|/Formatted Printing of IVs, UVs, and NVs>.
+
+But if you're using C<PerlIO_printf()>, it's less typing and visual
+clutter to use the C<"%z"> length modifier (for I<siZe>):
+
+        PerlIO_printf("STRLEN is %zu\n", len);
+
+This modifier is not portable, so its use should be restricted to
+C<PerlIO_printf()>.
+
 =head2 Pointer-To-Integer and Integer-To-Pointer
 
 Because pointer size does not necessarily equal integer size,