> Remember that %{{ A => 1, B => 2, C => 3 }} use the %BLOCK syntax and BLOCK contains a sequence of statements.

I had problems to see why dereferencing should be implemented with a block syntax, but indeed one is free to include any statement inside %{...} as long as it can't be confused with a variable

for instance 

  DB<2> print %{ ( do{ {A=>1} } ) }
A1

[download]

Actually the problem is not restricted to dereferencing. other block syntax is having the same impact of messing up "nextstate".

Like this 

   print_calling_line( __LINE__,
                       do { A => 1, B => 2, C => 3 }
                     );

[download]

will report the line of the do statement.

Cheers Rolf
(addicted to the Perl Programming Language and ☆☆☆☆ :)
Je suis Charlie!

update

actually the line of the last block will be reported

   print_calling_line( __LINE__,
                       do { A => 1, B => 2, C => 3 },
                       do { A => 1, B => 2, C => 3 },
                       do { A => 1, B => 2, C => 3 }
                     );
...
Called from line 27; caller() reports line 30

[download]

looks like the line number is stored inside a localized variable in C and overwritten while parsing following blocks.

In reply to Re^2: caller() returns wrong line on multi-line function call (blocks) by LanX
in thread caller() returns wrong line on multi-line function call by jh

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.