perl – 有没有办法检查,如果参数是用单引号传递的？

#!/usr/local/bin/perl
use warnings;
use 5.012;

my $uri = shift;
# uri_check
# ...

添加了此示例,以使我的问题更加清晰.

#!/usr/local/bin/perl
use warnings;
use 5.012;
use URI;
use URI::Escape;
use WWW::YouTube::Info::Simple;
use Term::Clui;

my $uri = shift;
# uri check here

$uri = URI->new( $uri );
my %params = $uri->query_form;
die "Malformed URL or missing parameter" if $params{v} eq '';
my $video_id = uri_escape( $params{v} );

my $yt = WWW::YouTube::Info::Simple->new( $video_id );
my $info = $yt->get_info();

my $res = $yt->get_resolution();
my @resolution;
for my $fmt ( sort { $a <=> $b }  keys %$res ) {
    push @resolution,sprintf "%d : %s",$fmt,$res->{$fmt};

}

# with an uri-argument which is not passed in single quotes 
# the script doesn't get this far

my $fmt = choose( 'Resolution',@resolution );
$fmt = ( split /s:s/,$fmt )[0];
say $fmt;