Create interpreter.py

Author: BaseMax

interpreter.py

@@ -0,0 +1,26 @@
+from nodes import *
+from values import Number
+
+class Interpreter:
+	def visit(self, node):
+		method_name = f'visit_{type(node).__name__}'
+		method = getattr(self, method_name)
+		return method(node)
+
+	def visit_NumberNode(self, node):
+		return Number(node.value)
+
+	def visit_AddNode(self, node):
+		return Number(self.visit(node.node_a).value + self.visit(node.node_b).value)
+
+	def visit_MinusNode(self, node):
+		return Number(self.visit(node.node_a).value - self.visit(node.node_b).value)
+
+	def visit_MultiplyNode(self, node):
+		return Number(self.visit(node.node_a).value * self.visit(node.node_b).value)
+
+	def visit_DivideNode(self, node):
+		try:
+			return Number(self.visit(node.node_a).value / self.visit(node.node_b).value)
+		except:
+			raise Exception("Runtime math error")