Create new parser (works for lists so far)

smnp/newast/node/expression.py

@@ -0,0 +1,37 @@
+from smnp.newast.node.model import Node
+from smnp.newast.node.none import NoneNode
+from smnp.newast.parser import Parser
+
+
+class ExpressionNode(Node):
+    def __init__(self, pos):
+        super().__init__(pos, [NoneNode()])
+
+    @property
+    def value(self):
+        return self[0]
+
+
+    @value.setter
+    def value(self, v):
+        self[0] = v
+
+
+    @classmethod
+    def withValue(cls, pos, v):
+        node = cls(pos)
+        node.value = v
+        return node
+
+
+    @classmethod
+    def _parse(cls, input):
+        from smnp.newast.node.integer import IntegerLiteralNode
+        from smnp.newast.node.string import StringLiteralNode
+        from smnp.newast.node.list import ListNode
+
+        return Parser.oneOf(
+            IntegerLiteralNode.parse,
+            StringLiteralNode.parse,
+            ListNode.parse
+        )(input)