Remove old parser and move new parser to 'ast' package

smnp/ast/node/statement.py

@@ -0,0 +1,17 @@
+from smnp.ast.node.model import Node
+from smnp.ast.parser import Parser
+
+
+class StatementNode(Node):
+
+    @classmethod
+    def _parse(cls, input):
+        from smnp.ast.node.block import BlockNode
+        from smnp.ast.node.expression import ExpressionNode
+        from smnp.ast.node.ret import ReturnNode
+
+        return Parser.oneOf(
+            BlockNode.parse,
+            ReturnNode.parse,
+            ExpressionNode.parse
+        )(input)