Let's try something new; how about manually deleting/redefining the subroutine in the symbol table?
use feature 'say';
undef &say;
*say = \¬_say;
say 'test';
sub not_say {
print 'not saying';
}
Maybe I'm getting my namespaces all mixed up because that doesn't seem to redefine the sub at all.
The confounding thing is that this works:
use strict;
use warnings;
use 5.012;
#Rule: sub names are entered into the symbol table.
sub abc {
print "abc\n";
}
sub xyz {
print "xyz\n";
}
local *abc; #gets rid of 'redefined main::abc' warning'
*abc = \&xyz;
abc;
--output:--
xyz
But this doesn't work:
use strict;
use warnings;
use 5.012;
sub xyz {
print "xyz\n";
}
local *say;
*say = \&xyz;
say 'hello';
--output:--
hello
Nor does this:
use strict;
use warnings;
use 5.012;
use subs qw( say ); #Supposedly overrides a built in
my $verbose = 1;
sub say {
if ($verbose) {
print shift, " world\n";
}
}
say 'hello';
--output:--
hello
-
Are you posting in the right place? Check out Where do I post X? to know for sure.
-
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
<li> <nbsp> <ol> <p>
<small> <strike> <strong>
<sub> <sup> <table>
<td> <th> <tr> <tt>
<u> <ul>
-
Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
-
Want more info? How to link
or How to display code and escape characters
are good places to start.
|