Interesting...

So somehow do blocks aren't blocks either?

I'm pretty sure a do BLOCK has its own lexical scope:

$ perl -wMstrict -le 'my $x="A"; do { print $x; my $x="B"; print $x }; print $x' A B A $ perl -wMstrict -le 'do { my $x="A" }; print $x' Global symbol "$x" requires explicit package name (did you forget to d +eclare "my $x"?) at -e line 1. Execution of -e aborted due to compilation errors.

But it seems to me like this might have something to do with a do block being able to return a value:

$ perl -wMstrict -le 'sub Foo::DESTROY {print "BLAM"}; print "A"; do { my $x = bless {}, "Foo" }; print "B"' A B BLAM $ perl -wMstrict -le 'sub Foo::DESTROY {print "BLAM"}; print "A"; do { my $x = bless {}, "Foo"; 1 }; print "B"' A BLAM B

Although I don't know why do { my $x = bless {}, "Foo" } vs. do { bless {}, "Foo" } makes a difference either. Seems strange to me.


In reply to Re^2: File::Temp survival and scope created by "do" by haukex
in thread File::Temp survival and scope created by "do" by vr

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.