Defines interface of class/object that defines an evaluator_value_logic.
A class|object implementing this interface is called before evaluation and transforms leaf values in syntax tree.
AND
/ \
< <
/ \ / \
A 5 B -4
if you define an evaluator_value_logic defined for int values and returns absolute value then evaluation will be on
the following tree
Defines interface of class/object that defines an evaluator_value_logic. A class|object implementing this interface is called before evaluation and transforms leaf values in syntax tree.
AND / \ < < / \ / \ A 5 B -4
if you define an evaluator_value_logic defined for int values and returns absolute value then evaluation will be on the following tree
AND / \ < < / \ / \ A 5 B 4