use re 'debug'; 
use re 'debug';
$_="abc def";
#$_= qq!"abc def$"!;

if (/"^abc[A\b]def$"/ ){
    print "\ntrue\n";
}
else
{
    print "\nfalse\n";
}
__END__
Compiling REx `"^abc[A\b]def '
size 19 Got 156 bytes for offset annotations.
first at 1
   1: EXACT <">(3)
   3: BOL(4)
   4: EXACT <abc>(6)
   6: ANYOF[\10A](17)
  17: EXACT <def >(19)
  19: END(0)
anchored ""abc" at 0 (checking anchored) minlen 9
Offsets: [19]
        1[1] 0[0] 2[1] 3[3] 0[0] 6[5] 0[0] 0[0] 0[0] 0[0] 0[0] 0[0] 0[
+0] 0[0] 0[0] 0[0] 11[4] 0[0] 15[0]

false
Freeing REx: `"\"^abc[A\\b]def "'

[download]
use re 'debug';
#$_="abc def";
$_= qq!"abc def$"!;

if (/"^abc[A\b]def$"/ ){
    print "\ntrue\n";
}
else
{
    print "\nfalse\n";
}
__END__
Compiling REx `"^abc[A\b]def '
size 19 Got 156 bytes for offset annotations.
first at 1
   1: EXACT <">(3)
   3: BOL(4)
   4: EXACT <abc>(6)
   6: ANYOF[\10A](17)
  17: EXACT <def >(19)
  19: END(0)
anchored ""abc" at 0 (checking anchored) minlen 9
Offsets: [19]
        1[1] 0[0] 2[1] 3[3] 0[0] 6[5] 0[0] 0[0] 0[0] 0[0] 0[0] 0[0] 0[
+0] 0[0] 0[0] 0[0] 11[4] 0[0] 15[0]
Guessing start of match, REx ""^abc[A\b]def " against ""abc def "...
Found anchored substr ""abc" at offset 0...
Guessed: match at offset 0
Matching REx ""^abc[A\b]def " against ""abc def "
  Setting an EVAL scope, savestack=3
   0 <> <"abc def >       |  1:  EXACT <">
   1 <"> <abc def >       |  3:  BOL
                            failed...
Match failed

false
Freeing REx: `"\"^abc[A\\b]def "'

[download]

In reply to Re: What it mathches` by Anonymous Monk
in thread What it mathches` by abubacker

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.