WordPress at a glance
action is not described

parse_comment_query action-hook . WP 4.2.0

Fires after the comment query vars have been parsed.

Usage

add_action( 'parse_comment_query', 'action_function_name_3933' );
function action_function_name_3933( $this ){
	// action...
}
$this(WP_Comment_Query)
The WP_Comment_Query instance (passed by reference).

Where the hook is called

WP_Comment_Query::parse_query()
wp-includes/class-wp-comment-query.php 328
do_action_ref_array( 'parse_comment_query', array( &$this ) );

Where the hook is used (in WP core)

Does not used.