class Rouge::Lexers::Prometheus

def self.functions
  @functions ||= Set.new %w(
    abs absent ceil changes clamp_max clamp_min count_scalar day_of_month
    day_of_week days_in_month delta deriv drop_common_labels exp floor
    histogram_quantile holt_winters hour idelta increase irate label_replace
    ln log2 log10 month predict_linear rate resets round scalar sort
    sort_desc sqrt time vector year avg_over_time min_over_time
    max_over_time sum_over_time count_over_time quantile_over_time
    stddev_over_time stdvar_over_time
  )
end