Create evaluator for power operator

smnp/runtime/evaluators/power.py

@@ -0,0 +1,20 @@
+from smnp.error.runtime import RuntimeException
+from smnp.runtime.evaluator import Evaluator
+from smnp.runtime.evaluators.expression import expressionEvaluator
+from smnp.type.model import Type
+
+
+class PowerEvaluator(Evaluator):
+
+    @classmethod
+    def evaluator(cls, node, environment):
+        left = expressionEvaluator(doAssert=True)(node.left, environment).value
+        right = expressionEvaluator(doAssert=True)(node.right, environment).value
+
+        if left.type != Type.INTEGER:
+            raise RuntimeException( f"Operator '{node.operator.value}' is supported only by {Type.INTEGER.name.lower()} type", node.left.pos)
+
+        if right.type != Type.INTEGER:
+            raise RuntimeException( f"Operator '{node.operator.value}' is supported only by {Type.INTEGER.name.lower()} type", node.right.pos)
+
+        return Type.integer(int(left.value ** right.value))