That's interesting - I've never used the tie interface before - I remember reading years ago that it is slow, and so just avoided it. Also, I thought that, because the variable is blessed into a package, it would still return it's class name when queried by ref. But you're right, it doesn't.
It is slower, especially tie'ing vs bless'ing, but FETCH'ing vs overload'ed stringification is only about 15% different:
#==============================
package i18n::String;
#==============================
use strict; use warnings;
no warnings 'once';
use overload q{""} =>
sub { $i18n::Current_Lang->maketext( ${ $_[0] } ) };
sub new {
my $class = shift;
my $string = shift;
return bless( \$string, $class );
}
#==============================
package i18n::String2;
#==============================
use strict;
use warnings FATAL => 'all', NONFATAL => 'redefine';
sub TIESCALAR {
my $class = shift;
my $string = shift;
return bless( \$string, $class );
}
sub FETCH {
$i18n::Current_Lang->maketext( ${ $_[0] } )
}
# BENCHMARK INIT ##############
use Benchmark qw(cmpthese);
cmpthese(1000000, {
bless_string => sub { my $s = Burro::i18n::String->new('Januar
+y'); },
tie_string => sub {tie my $s,Burro::i18n::String2,'January'}
});
Rate tie_string bless_string
tie_string 395257/s -- -30%
bless_string 561798/s 42% --
# BENCHMARK FETCH ###########
use Benchmark qw(cmpthese);
my $s = i18n::String->new('January');
tie my $n,i18n::String2,'January';
cmpthese(1000000, {
fetch_blessed => sub {"$s" },
fetch_tied => sub {"$n"}
});
Rate fetch_tied fetch_blessed
fetch_tied 168634/s -- -11%
fetch_blessed 190476/s 13% --
That said, as far as I can see, tie works only on named variables:
my @months = map { tie my $var, i18n::String2, $_ } qw(January Febr
+uary);
print Dumper(\@months);
$VAR1 = [
bless( do{\(my $o = 'January')}, 'i18n::String2' ),
bless( do{\(my $o = 'February')}, 'i18n::String2' )
];
So in the process of solving one issue, I could be introducing many more.
Defensive programming it is!
thanks for the suggestion BrowserUK
Clint
-
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.