Provided by: libweb-simple-perl_0.031-1_all 
NAME
Web::Simple::AntiquatedPerl - the slides from the talk
WHAT?
Web::Simple was originally introduced in a talk at the Italian Perl Workshop, entitled
Antiquated Perl.
The video is available on the Shadowcat site:
<http://www.shadowcat.co.uk/archive/conference-video/ipw-2009/antiquated>
If you don't particularly want to watch me confusing a bunch of Italian perl mongers, the
slides are reproduced below.
SLIDES
Antiquated
Perl
----
Modern
Perl?
----
Post
Modern
Perl
----
Enlightened
Perl
----
everybody
knows
----
Catalyst
Moose
DBIx::Class
----
Modern
Perl?
----
perl5
v10
----
given ($x) {
when (3) {
...
----
~~
----
what's the
opposite?
----
Old
Perl?
----
if it
works
----
Legacy
Perl?
----
not
interesting
----
Stupid
Perl
----
*$&^*(^
FormMail.PL
----
Antiquated
Perl
----
Antique
----
Old *and*
beautiful
----
Simple
Elegant
----
$|++
----
use IO::Handle;
STDOUT->autoflush(1);
----
it's core.
it's fine.
----
but why
think?
----
select((select(FOO),$|++)[0])
----
(select(FOO),$|++)
->
($old_selected_fh,$|)
----
(select(FOO),$|++)[0]
->
$old_select_fh
----
select((select(FOO),$|++)[0])
->
use IO::Handle;
FOO->autoflush(1)
----
~~
----
~~@x
----
~(~(@x))
----
bitwise
negation
----
so ...
----
~@x
->
~(scalar @x)
----
~~$number
->
$number
----
~~@x
->
scalar @x
----
perl -MMoose -e'print ~~keys %INC'
84
----
overload::constant
----
lets you
affect
parsing
----
numbers
strings
----
q qq qr
t s qw
----
i18n.pm
----
~~"$foo bar"
loc("_[0] bar", $foo)
----
for
----
for ($foo) {
/bar/ and ...
----
for ($foo) {
/bar/ and return do {
<code here>
}
----
/foo/gc
----
/\Gbar/gc
----
sub parse {
my ($self, $str) = @_;
for ($str) {
/match1/gc and return
$self->_subparse_1($_)
----
sub _subparse_1 {
my ($self) = @_;
for ($_[1]) {
/\Gsubmatch1/gc ...
----
prototypes
----
sub foo (&) {
----
foo {
...
};
----
prototype \&foo
----
typeglobs
----
*{"${package}::${name}"}
= sub { ... }
----
local
----
local $_
----
local *Carp::croak
= \&Carp::confess;
----
do {
local (@ARGV, $/) = $file;
<>
}
----
strict
and
warnings
----
strict->import
----
affects
compilation
scope
----
sub strict_and_warnings::import {
strict->import;
warnings->import;
}
----
use strict_and_warnings;
----
$^H
%^H
----
$^H |= 0x20000;
$^H{'foo'}
= bless($foo, 'My::Foo');
----
sub My::Foo::DESTROY {
----
delete ${$package}{myimport}
----
B::Hooks::EndOfScope
----
tie
----
tie $var, 'Foo';
----
sub FETCH
sub STORE
----
Scalar
Array
Hash
Handle
----
now ...
----
mst: destruction
testing technology
since March 1983
----
3 days
old
----
2 weeks
early
----
incubator
----
glass box
plastic tray
heater
----
design
flaw
----
BANG
----
so ...
----
interesting
fact
----
prototypes
only warn
when parsed
----
error when
compiled
----
so ...
----
dispatch [
sub (GET + /) { ... },
sub (GET + /user/*) { ... }
];
----
foreach my $sub (@$dispatch) {
my $proto = prototype $sub;
$parser->parse($proto);
...
----
PARSE: { do {
push @match, $self->_parse_spec_section($spec)
or $self->_blam("Unable to work out what the next section is");
last PARSE if (pos == length);
/\G\+/gc or $self->_blam('Spec sections must be separated by +');
} until (pos == length) };
----
sub _blam {
my ($self, $error) = @_;
my $hat = (' ' x pos).'^';
die "Error parsing dispatch specification: ${error}\n
${_}
${hat} here\n";
}
----
Error parsing ...
GET+/foo
^ here
----
sub (GET + /user/*) {
my ($self, $user) = @_;
----
I hate
fetching
$self
----
*{"${app}::self"}
= \${"${app}::self"};
----
use vars
----
sub _run_with_self {
my ($self, $run, @args) = @_;
my $class = ref($self);
no strict 'refs';
local *{"${class}::self"} = \$self;
$self->$run(@args);
}
----
HTML
output
----
templates
----
HTML is
NOT TEXT
----
<div>,
$text,
</div>;
----
<div>
----
<$fh>
----
tie *{"${app}::${name}"},
'XML::Tags::TIEHANDLE',
"<${name}>";
----
sub TIEHANDLE { my $str = $_[1]; bless \$str, $_[0] }
sub READLINE { ${$_[0]} }
----
sub DESTROY {
my ($into, @names) = @$_[0];
no strict 'refs';
delete ${$into}{$_}
for @names;
}
----
</div>
----
glob('/div');
----
*CORE::GLOBAL::glob
= sub { ... };
----
delete
${CORE::GLOBAL::}{glob};
----
sub foo {
use XML::Tags qw(div);
<div>, "foo!", </div>;
}
----
what about
interpolation
----
my $stuff = 'foo"bar';
<a href="$stuff">
----
hmm ...
----
overload::constant!
----
glob('a href="'.$stuff.'"');
----
glob(
bless(\'a href="', 'MagicTag')
.$stuff
.bless(\'"', 'MagicTag')
)
----
use overload
'.' => 'concat';
sub concat {
----
hooking
it up
----
sub (.html) {
filter_response {
$self->render_html($_[1])
}
}
----
bless(
$_[1],
'Web::Simple::ResponseFilter'
);
----
if ($self->_is_response_filter($result)) {
return $self->_run_with_self(
$result,
$self->_run_dispatch_for($new_env, \@disp)
);
}
----
and the result?
----
goto &demo;
----
questions?
----
thank
you
AUTHOR
Matt S. Trout <mst@shadowcat.co.uk>
COPYRIGHT
Copyright (c) 2011 Matt S. Trout <mst@shadowcat.co.uk>
LICENSE
This text is free documentation under the same license as perl itself.