Get custom post type by category in a page template

This is a version of a function I’m using in the framework I’m working on, with example html replacing another function that contains something like it.

// Custom Loop

function arrr_custom_loop( $r_type="post", $r_post_num, $r_tax = 'category', $r_terms="featured" )  {
$args = array( 
    'showposts' => $r_post_num, 
    'tax_query' => array( 
        array( 
            'post_type' => $r_type,
            'taxonomy' => $r_tax, 
            'field' => 'slug', 
            'terms' => array( 
                $r_terms 
            ), 
        )
    )
);
query_posts( $args );
if (have_posts())
while ( have_posts() ) : the_post();
$more = 0;
?>
<article>
                <header class="pagetitle">
<?php if ( is_singular() )  { ?>
                    <h1><?php the_title(); ?></h1>
<?php } else { ?>
                    <h2 class="entry"><a href="https://wordpress.stackexchange.com/questions/23136/<?php the_permalink(); ?>"><?php the_title(); ?></a></h2>
<?php } ?>
                </header>
                <div class="content_wrapper">
                    <div class="content">
<?php the_content(); ?>
                    </div>
                </div>
<?php if ( comments_open() && ! post_password_required() )  { ?>
                <div class="comments_wrapper">
                    <div class="comments">
<?php comments_template(); ?>
                    </div>
                </div>
<?php } ?>
        </article>
<?php endwhile;
wp_reset_query();
}

So you would then just use the function with the arguments created:

arrr_custom_loop( 'portfolio', 10, 'galleries', 'pirates' );