result

Template----
1-122
2-
3-123
Xslate/TTerse----
Text::Xslate: Can't locate object method "moge" via package "Hash::MultiValue" at test.pl line 25.
 (/home/chiba/tmp/tmpl/test.tt:1:&main[3]) at test.pl line 25
        eval {...} called at test.pl line 25
----------------------------------------------------------------------------
1-[% req.moge %]
2-[% req.get %]
----------------------------------------------------------------------------

        ... exception cought on accessor        ... (/home/chiba/tmp/tmpl/test.tt:1:&main[3]) at test.pl line 25
----------------------------------------------------------------------------
1-[% req.moge %]
2-[% req.get %]
----------------------------------------------------------------------------
1-
2-
3-123

Xslate/Kolon----
Text::Xslate: Can't locate object method "moge" via package "Hash::MultiValue" at test.pl line 27.
 ("<string>":1:&main[3]) at test.pl line 27
        eval {...} called at test.pl line 27

        ... exception cought on accessor        ... ("<string>":1:&main[3]) at test.pl line 27
1-
2-
3-123

test.pl

use 5.12.1;
use warnings;
use utf8;

use Text::Xslate;
use Template;
use Hash::MultiValue;

my $var = { req => Hash::MultiValue->new(get => '123', 'moge' => '122') };
my $tt = Template->new({
    INCLUDE_PATH => 'tmpl',
});

my $tx_tt = Text::Xslate->new(
    path   => 'tmpl',
    syntax => 'TTerse',
);
my $tx_kolon = Text::Xslate->new(
    path   => 'tmpl',
);

say 'Template----';
$tt->process('test.tt', $var);
say 'Xslate/TTerse----';
say $tx_tt->render('test.tt', $var);
say 'Xslate/Kolon----';
say $tx_kolon->render('test.tx', $var);

test.tt

1-[% req.moge %]
2-[% req.get %]
3-[% req.get('get') %]

test.tx

1-<: $req.moge :>
2-<: $req.get :>
3-<: $req.get('get') :>