How to make "use My::defaults" with modern perl & utf8 defaults?
I want make a module for my own "default use", e.g.:
use My::perldefs;
with the following content (mostly based on tchrist's post.)
use 5.014;
use strict;
use features qw(switch say state);
no warnings;
use warnings qw(FATAL closed threads internal debugging pack substr malloc
unopened portable prototype inplace io pipe unpack regexp
deprecated exiting glob digit printf utf8 layer
reserved parenthesis taint closure semicolon);
no warnings qw(exec newline);
use utf8;
use open qw(:std :utf8);
use charnames qw(:full);
use feature qw(unicode_strings);
use Encode qw(encode decode);
use Unicode::Normalize qw(NFD NFC);
use Carp qw(carp croak confess cluck);
use autodie;
Simply, want achieve one use My::perldefs
for achieving
- full and correct utf8 support, and with
- all modern perl features turned on.
Based on recent question the good start-point is uni::perl. It is do nearly all things what I want, only need add:
use feature qw(unicode_strings);
use charnames qw(:full);
use Encode qw(encode decode);
use Unicode::Normalize qw(NFD NFC);
use autodie;
I will award with the bounty someone who will extend the uni::perl (inseretd bellow) with the above 5 lines, using an effective and correct way.
Please, HELP make an good boilerplate for utf8 and modern perl use. Thanks.
Bellow is the copy of uni::perl.
package My::perldefs;
use 5.014;
BEGIN {
${^WARNING_BITS} ^= ${^WARNING_BITS} ^ "\xfc\x3f\xf3\x00\x0f\xf3\xcf\xc0\xf3\xfc\x33\x03";
$^H |= 0x00000602;
}
m{
use strict;
use warnings;
}x;
use mro ();
BEGIN {
for my $sub (qw(carp croak confess)) {
no strict 'refs';
*$sub = sub {
my $caller = caller;
local *__ANON__ = $caller .'::'. $sub;
require Carp;
*{ $caller.'::'.$sub } = \&{ 'Carp::'.$sub };
goto &{ 'Carp::'.$sub };
};
开发者_StackOverflow }
}
sub import {
my $me = shift;
my $caller = caller;
${^WARNING_BITS} ^= ${^WARNING_BITS} ^ "\xfc\x3f\xf3\x00\x0f\xf3\xcf\xc0\xf3\xfc\x33\x03";
$^H |=
0x00000602 # strict
| 0x00800000 # utf8
;
# use feature
$^H{feature_switch} =
$^H{feature_say} =
$^H{feature_state} = 1;
# use mro 'c3';
mro::set_mro($caller, 'c3');
#use open (:utf8 :std);
${^OPEN} = ":utf8\0:utf8";
binmode(STDIN, ":utf8");
binmode(STDOUT, ":utf8");
binmode(STDERR, ":utf8");
for my $sub (qw(carp croak confess)) {
no strict 'refs';
*{ $caller .'::'. $sub } = \&$sub;
}
while (@_) {
my $feature = shift;
if ($feature =~ s/^://) {
my $package = $me. '::'. $feature;
eval "require $package; 1" or croak( "$@" );
$package->load( $caller );
}
}
}
1;
Ps:
All of the above is (C): Mons Anderson, C<< <mons at cpan.org> >>
use feature qw(unicode_strings)
is easy, $^H{feature_unicode}
simply needs to be set. The other modules aren't too hard as well, one simply needs to use require
and call the necessary module functions explicitly (e.g. Encode
and Unicode::Normalize
define an export
method via Exporter
that takes the calling package as a parameter). The tricky one is autodie
, it really goes strictly by the value of caller
and will normally inject its functions into My::perldefs
package. I think the only good solution here (short of reimplementing the module in My::perldefs
) is using goto
- this allows calling the required method without changing caller
, so the methods are injected into the correct namespace. Here is what I got in the end:
package My::perldefs;
use 5.014;
BEGIN {
${^WARNING_BITS} ^= ${^WARNING_BITS} ^ "\xfc\x3f\xf3\x00\x0f\xf3\xcf\xc0\xf3\xfc\x33\x03";
$^H |= 0x00000602;
}
m{
use strict;
use warnings;
}x;
use mro ();
BEGIN {
for my $sub (qw(carp croak confess)) {
no strict 'refs';
*$sub = sub {
my $caller = caller;
local *__ANON__ = $caller .'::'. $sub;
require Carp;
*{ $caller.'::'.$sub } = \&{ 'Carp::'.$sub };
goto &{ 'Carp::'.$sub };
};
}
}
sub import {
my $me = shift;
my $caller = caller;
${^WARNING_BITS} ^= ${^WARNING_BITS} ^ "\xfc\x3f\xf3\x00\x0f\xf3\xcf\xc0\xf3\xfc\x33\x03";
$^H |=
0x00000602 # strict
| 0x00800000 # utf8
;
# use feature
$^H{feature_switch} =
$^H{feature_say} =
$^H{feature_state} =
$^H{feature_unicode}= 1;
# use mro 'c3';
mro::set_mro($caller, 'c3');
#use open (:utf8 :std);
${^OPEN} = ":utf8\0:utf8";
binmode(STDIN, ":utf8");
binmode(STDOUT, ":utf8");
binmode(STDERR, ":utf8");
#use charnames qw(:full)
require charnames;
charnames->import(":full");
#use Encode qw(encode decode)
require Encode;
Encode->export($caller, "encode", "decode");
#use Unicode::Normalize qw(NFC NFD)
require Unicode::Normalize;
Unicode::Normalize->export($caller, "NFC", "NFD");
for my $sub (qw(carp croak confess)) {
no strict 'refs';
*{ $caller .'::'. $sub } = \&$sub;
}
while (@_) {
my $feature = shift;
if ($feature =~ s/^://) {
my $package = $me. '::'. $feature;
eval "require $package; 1" or croak( "$@" );
$package->load( $caller );
}
}
#use autodie qw(:default)
#goto needs to be used here to make sure that caller doesn't change
require autodie;
@_ = ("autodie", ":default");
goto &autodie::import;
}
1;
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