我想为自己的“默认使用”制作一个模块,例如：
use My::perldefs;
具有以下内容(主要基于tchrist’s帖子)
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;
只需要实现一个使用My :: perldefs来实现
>完整和正确的utf8支持,并与
>所有现代的perl功能开启.
基于recent question,良好的起点是uni :: perl.几乎所有的东西都是我想要的,只需要添加：
use feature qw(unicode_strings); use charnames qw(:full); use Encode qw(encode decode); use Unicode::normalize qw(NFD NFC); use autodie;
我将奖励有利于上述5条线的uni :: perl(inseretd bellow)的使用有效和正确的方法的人.
请帮助为utf8和现代perl使用做一个很好的样板.谢谢.
Bellow是uni :: perl的副本.
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} =
$^H{feature_state} = 1;
# use mro 'c3';
mro::set_mro($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( $caller );
}
}
}
1;
PS：
All of the above is (C): Mons Anderson,C<< <mons at cpan.org> >>
解决方法
使用功能qw(unicode_strings)很简单,只需要设置$^ H {feature_unicode}.其他模块也不是太难,只需要明确地使用require并调用必要的模块功能(例如,Encode和Unicode :: normalize通过导出器定义导出方法,该方法将调用包作为参数).棘手的一个是autodie,它真的严格按照调用者的价值,通常会将其功能注入到My :: perldefs包中.我认为这里唯一很好的解决方案(在My :: perldefs中没有重新实现模块)正在使用goto – 这允许调用所需的方法而不改变调用者,因此这些方法被注入到正确的命名空间中.这是我得到的结局：
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,":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;