What's the best way to tell if your perl's running on -e?

my $process_info = `ps $$ | tail -1`;
my $is_oneliner
    = $process_info =~ m/perl.*?s+-[^P{IsLower}e]*e[^P{IsLower}e]*s+/m
    ;

package MMN;
use My::Module::Name '/./';
use Exporter ();
@ISA = 'Exporter';
@EXPORT = @My::Module::Name::EXPORT_OK;
1;

perl -MMy::Module::Name=/./ -e ...