@imports = @exports;
last;
}
+ # We need a way to emulate 'use Foo ()' but still
+ # allow an easy version check: "use Foo 1.23, ''";
+ if (@imports == 2 and !$imports[1]) {
+ @imports = ();
+ last;
+ }
} elsif ($sym !~ s/^&// || !$exports{$sym}) {
warn qq["$sym" is not exported by the $pkg module];
$oops++;
sub require_version {
my($self, $wanted) = @_;
my $pkg = ref $self || $self;
- my $version = ${"${pkg}::VERSION"} || "(undef)";
- Carp::croak("$pkg $wanted required--this is only version $version")
- if $version < $wanted;
+ my $version = ${"${pkg}::VERSION"};
+ if (!$version or $version < $wanted) {
+ $version ||= "(undef)";
+ my $file = $INC{"$pkg.pm"};
+ $file &&= " ($file)";
+ Carp::croak("$pkg $wanted required--this is only version $version$file")
+ }
$version;
}
checks the value of $VERSION in the exporting module.
Since the default require_version method treats the $VERSION number as
-a simple numeric value it will regard version 1.10 and being lower
-than 1.9. For this reason it is strongly recommended that you use
-numbers with at least two decimal places, e.g., 1.09.
+a simple numeric value it will regard version 1.10 as lower than
+1.9. For this reason it is strongly recommended that you use numbers
+with at least two decimal places, e.g., 1.09.
=head2 Managing Unknown Symbols
Exporter::export_ok_tags('bar'); # add aa, cc and dd to @EXPORT_OK
Any names which are not tags are added to @EXPORT or @EXPORT_OK
-unchanged but will trigger a warning (with -w) to avoid misspelt tags
+unchanged but will trigger a warning (with C<-w>) to avoid misspelt tags
names being silently added to @EXPORT or @EXPORT_OK. Future versions
may make this a fatal error.