+
+ # Values for each element
+ fun values: RES is abstract
+
+ # Collect metric values on elements
+ fun collect(elements: Set[ELM]) is abstract
+
+ # The value calculated for the element
+ fun [](element: ELM): VAL do return values[element]
+
+ # Does the element have a value for this metric?
+ fun has_element(element: ELM): Bool do return values.has_key(element)
+
+ # The values average
+ fun avg: Float is abstract
+
+ # Pretty print the metric results in console
+ fun to_console(indent: Int, colors: Bool) do
+ if values.is_empty then
+ if colors then
+ print "{"\t" * indent}{name}: {desc} -- nothing".green
+ else
+ print "{"\t" * indent}{name}: {desc} -- nothing"
+ end
+ return
+ end
+
+ var max = self.max
+ var min = self.min
+ if colors then
+ print "{"\t" * indent}{name}: {desc}".green
+ print "{"\t" * indent} avg: {avg}".light_gray
+ print "{"\t" * indent} max: {max} ({self[max]})".light_gray
+ print "{"\t" * indent} min: {min} ({self[min]})".light_gray
+ print "{"\t" * indent} std: {std_dev}".light_gray
+ else
+ print "{"\t" * indent}{name}: {desc}"
+ print "{"\t" * indent} avg: {avg}"
+ print "{"\t" * indent} max: {max} ({self[max]})"
+ print "{"\t" * indent} min: {min} ({self[min]})"
+ print "{"\t" * indent} std: {std_dev}"
+ end
+ end
+
+ # The sum of all the values.
+ fun sum: VAL is abstract
+
+ # The values standard derivation
+ fun std_dev: Float is abstract
+
+ # The element with the highest value
+ fun max: ELM is abstract
+
+ # The element with the lowest value
+ fun min: ELM is abstract
+
+ # The value threshold above what elements are considered as 'interesting'
+ fun threshold: Float do return avg + std_dev
+
+ # The set of element above the threshold
+ fun above_threshold: Set[ELM] is abstract
+
+ # Sort the metric keys by values
+ fun sort: Array[ELM] do
+ return values.keys_sorted_by_values(default_reverse_comparator)
+ end