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49 lines
1.1 KiB
Perl
49 lines
1.1 KiB
Perl
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package vars;
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use 5.006;
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our $VERSION = '1.01';
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use warnings::register;
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use strict qw(vars subs);
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sub import {
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my $callpack = caller;
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my ($pack, @imports) = @_;
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my ($sym, $ch);
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foreach (@imports) {
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if (($ch, $sym) = /^([\$\@\%\*\&])(.+)/) {
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if ($sym =~ /\W/) {
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# time for a more-detailed check-up
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if ($sym =~ /^\w+[[{].*[]}]$/) {
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require Carp;
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Carp::croak("Can't declare individual elements of hash or array");
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} elsif (warnings::enabled() and length($sym) == 1 and $sym !~ tr/a-zA-Z//) {
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warnings::warn("No need to declare built-in vars");
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} elsif (($^H &= strict::bits('vars'))) {
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require Carp;
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Carp::croak("'$_' is not a valid variable name under strict vars");
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}
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}
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$sym = "${callpack}::$sym" unless $sym =~ /::/;
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*$sym =
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( $ch eq "\$" ? \$$sym
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: $ch eq "\@" ? \@$sym
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: $ch eq "\%" ? \%$sym
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: $ch eq "\*" ? \*$sym
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: $ch eq "\&" ? \&$sym
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: do {
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require Carp;
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Carp::croak("'$_' is not a valid variable name");
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});
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} else {
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require Carp;
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Carp::croak("'$_' is not a valid variable name");
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}
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}
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};
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1;
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__END__
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