WordPress at a glance
filter is not described

post_comments_feed_link filter-hook . WP 1.5.1

Filters the post comments feed permalink.

Usage

add_filter( 'post_comments_feed_link', 'filter_function_name_3647' );
function filter_function_name_3647( $url ){
	// filter...

	return $url;
}
$url(string)
Post comments feed permalink.

Where the hook is called

get_post_comments_feed_link()
wp-includes/link-template.php 680
return apply_filters( 'post_comments_feed_link', $url );

Where the hook is used (in WP core)

Does not used.