use strict;
use warnings;
-use Carp qw/croak/;
-use Symbol qw/gensym/;
-
-use Variable::Magic qw/wizard cast dispell getdata/;
-
=head1 NAME
subs::auto - Read barewords as subroutine names.
=cut
-our $VERSION = '0.05';
+our $VERSION;
+BEGIN {
+ $VERSION = '0.05';
+}
=head1 SYNOPSIS
=cut
+use B;
+
+use B::Keywords;
+
+use Variable::Magic qw/wizard cast dispell getdata/;
+
BEGIN {
- croak 'uvar magic not available' unless Variable::Magic::VMG_UVAR;
+ unless (Variable::Magic::VMG_UVAR) {
+ require Carp;
+ Carp::croak('uvar magic not available');
+ }
+ require XSLoader;
+ XSLoader::load(__PACKAGE__, $VERSION);
}
-my @core = qw/abs accept alarm atan2 bind binmode bless break caller chdir
- chmod chomp chop chown chr chroot close closedir connect
- continue cos crypt dbmclose dbmopen default defined delete die
- do dump each endgrent endhostent endnetent endprotoent endpwent
- endservent eof eval exec exists exit exp fcntl fileno flock fork
- format formline getc getgrent getgrgid getgrnam gethostbyaddr
- gethostbyname gethostent getlogin getnetbyaddr getnetbyname
- getnetent getpeername getpgrp getppid getpriority getprotobyname
- getprotobynumber getprotoent getpwent getpwnam getpwuid
- getservbyname getservbyport getservent getsockname getsockopt
- given glob gmtime goto grep hex index int ioctl join keys kill
- last lc lcfirst length link listen local localtime lock log
- lstat map mkdir msgctl msgget msgrcv msgsnd my next no oct open
- opendir ord our pack package pipe pop pos print printf prototype
- push quotemeta rand read readdir readline readlink readpipe recv
- redo ref rename require reset return reverse rewinddir rindex
- rmdir say scalar seek seekdir select semctl semget semop send
- setgrent sethostent setnetent setpgrp setpriority setprotoent
- setpwent setservent setsockopt shift shmctl shmget shmread
- shmwrite shutdown sin sleep socket socketpair sort splice split
- sprintf sqrt srand stat state study sub substr symlink syscall
- sysopen sysread sysseek system syswrite tell telldir tie tied
- time times truncate uc ucfirst umask undef unlink unpack unshift
- untie use utime values vec wait waitpid wantarray warn when
- write/;
-push @core,qw/not __LINE__ __FILE__ DATA/;
-
my %core;
-@core{@core} = ();
+@core{
+ @B::Keywords::Barewords,
+ @B::Keywords::Functions,
+ 'DATA',
+} = ();
delete @core{qw/my local/};
-undef @core;
BEGIN {
*_REFCNT_PLACEHOLDERS = eval 'sub () { ' . ($] < 5.011002 ? 0 : 1) . '}'
my $tag = wizard data => sub { \(my $data = _REFCNT_PLACEHOLDERS ? 2 : 1) };
sub _reset {
- my ($pkg, $func) = @_;
my $fqn = join '::', @_;
+
my $cb = do {
no strict 'refs';
no warnings 'once';
*$fqn{CODE};
};
+
if ($cb and defined(my $data = getdata(&$cb, $tag))) {
$$data--;
return if $$data > 0;
- no strict 'refs';
- my $sym = gensym;
- for (qw/SCALAR ARRAY HASH IO FORMAT/) {
- no warnings 'once';
- *$sym = *$fqn{$_} if defined *$fqn{$_}
- }
- undef *$fqn;
- *$fqn = *$sym;
+
+ _delete_sub($fqn);
}
}
sub _fetch {
(undef, my $data, my $func) = @_;
+
return if $data->{guard} or $func =~ /::/ or exists $core{$func};
local $data->{guard} = 1;
+
my $hints = (caller 0)[10];
- if ($hints and $hints->{subs__auto}) {
- my $mod = $func . '.pm';
- if (not exists $INC{$mod}) {
- my $fqn = $data->{pkg} . '::' . $func;
- my $cb = do { no strict 'refs'; *$fqn{CODE} };
- if ($cb) {
- if (_REFCNT_PLACEHOLDERS and defined(my $data = getdata(&$cb, $tag))) {
- ++$$data;
- }
- return;
+ if ($hints and $hints->{+(__PACKAGE__)}) {
+ my $pm = $func . '.pm';
+ return if exists $INC{$pm};
+
+ my $fqn = $data->{pkg} . '::' . $func;
+ my $cb = do { no strict 'refs'; *$fqn{CODE} };
+ if ($cb) {
+ if (_REFCNT_PLACEHOLDERS and defined(my $data = getdata(&$cb, $tag))) {
+ ++$$data;
}
- return if do { no strict 'refs'; *$fqn{IO} };
- $cb = sub {
- my ($file, $line) = (caller 0)[1, 2];
- ($file, $line) = ('(eval 0)', 0) unless $file && $line;
- die "Undefined subroutine &$fqn called at $file line $line\n";
- };
- cast &$cb, $tag;
- no strict 'refs';
- *$fqn = $cb;
+ return;
}
+ return if do { no strict 'refs'; *$fqn{IO} };
+
+ $cb = sub {
+ my ($file, $line) = (caller 0)[1, 2];
+ ($file, $line) = ('(eval 0)', 0) unless $file && $line;
+ die "Undefined subroutine &$fqn called at $file line $line\n";
+ };
+ cast &$cb, $tag;
+
+ no strict 'refs';
+ *$fqn = $cb;
} else {
_reset($data->{pkg}, $func);
}
+
return;
}
sub _store {
(undef, my $data, my $func) = @_;
+
return if $data->{guard};
local $data->{guard} = 1;
+
_reset($data->{pkg}, $func);
+
return;
}
my %pkgs;
+my $pkg_rx = qr/
+ ^(?:
+ ::
+ |
+ (?:::)?
+ [A-Za-z_][A-Za-z0-9_]*
+ (?:::[A-Za-z_][A-Za-z0-9_]*)*
+ (?:::)?
+ )$
+/x;
+
sub _validate_pkg {
my ($pkg, $cur) = @_;
- return $cur unless $pkg;
- croak 'Invalid package name' if ref $pkg
- or $pkg =~ /(?:-|[^\w:])/
- or $pkg =~ /(?:\A\d|\b:(?::\d|(?:::+)?\b))/;
+
+ return $cur unless defined $pkg;
+
+ if (ref $pkg or $pkg !~ $pkg_rx) {
+ require Carp;
+ Carp::croak('Invalid package name');
+ }
+
$pkg =~ s/::$//;
$pkg = $cur . $pkg if $pkg eq '' or $pkg =~ /^::/;
$pkg;
sub import {
shift;
- croak 'Optional arguments must be passed as keys/values pairs' if @_ % 2;
+ if (@_ % 2) {
+ require Carp;
+ Carp::croak('Optional arguments must be passed as keys/values pairs');
+ }
my %args = @_;
- my $cur = (caller 1)[0];
- my $in = _validate_pkg $args{in}, $cur;
- $^H{subs__auto} = 1;
+
+ my $cur = (caller 1)[0];
+ my $in = _validate_pkg $args{in}, $cur;
++$pkgs{$in};
- no strict 'refs';
- cast %{$in . '::'}, $wiz, $in;
+ {
+ no strict 'refs';
+ cast %{$in . '::'}, $wiz, $in;
+ }
+
+ $^H{+(__PACKAGE__)} = 1;
+ $^H |= 0x020000;
+
+ return;
}
sub unimport {
- $^H{subs__auto} = 0;
+ $^H{+(__PACKAGE__)} = 0;
}
{
You have to open global filehandles outside of the scope of this pragma if you want them not to be treated as function calls. Or just use lexical filehandles and default ones as you should be.
+This pragma doesn't propagate into C<eval STRING>.
+
=head1 DEPENDENCIES
L<perl> 5.10.0.
-L<Carp> (standard since perl 5), L<Symbol> (since 5.002).
-
L<Variable::Magic> with C<uvar> magic enabled (this should be assured by the required perl version).
+L<B::Keywords>.
+
+L<Carp> (standard since perl 5), L<XSLoader> (since 5.006).
+
=head1 AUTHOR
Vincent Pit, C<< <perl at profvince.com> >>, L<http://www.profvince.com>.
projects / perl / modules / subs-auto.git / blobdiff