I don't really know how to explain ["next" cannot be used to exit a block which returns a value such as "eval {}", "sub {}" or "do {}"...]

It means next, last and redo ignore do blocks, eval blocks, etc. They will only cause loop blocks and bare blocks to repeat, exit, etc. It makes more sense when you read that same line in the documentation for last, since next doesn't cause a loop to exit. 

foreach my $var (1, 2, 3, "skip", 4) {
   eval {                     # This block is ignored.
      if ($var eq "skip") {
         next;
      }
   };
   print $var;
}

print("\n");

foreach my $var (1, 2, 3, "skip", 4) {
   {                          # This block exits.
      if ($var eq "skip") {
         next;
      }
   }
   print $var;
}

print("\n");

[download]

outputs 

1234
123skip4

[download]

In reply to Re^2: Exiting subroutine via next by ikegami
in thread Exiting subroutine via next by InfiniteLoop

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.