Create almost working proof of concept with new parsers

smnp/ast/node/chain.py

@@ -1,21 +1,31 @@
-from smnp.ast.node.atom import AtomParser
-from smnp.ast.node.list import ListParser
-from smnp.ast.node.map import MapParser
 from smnp.ast.node.operator import BinaryOperator
 from smnp.ast.node.valuable import Valuable
-from smnp.ast.parser import Parser
+from smnp.ast.parser import Parsers
 from smnp.token.type import TokenType
+from smnp.util.singleton import SingletonParser
 
 
 class Chain(Valuable):
     pass
 
-itemParser = Parser.oneOf(
-    ListParser,
-    MapParser,
-    AtomParser,
-)
 
-ChainParser = Parser.leftAssociativeOperatorParser(itemParser, [TokenType.DOT], itemParser,
-                                                   lambda left, op, right: Chain.withValue(BinaryOperator.withValues(left, op, right)))
+
+@SingletonParser
+def ChainParser():
+    from smnp.ast.node.atom import AtomParser
+
+    itemParser = Parsers.oneOf(
+        #ListParser,
+        #MapParser,
+        AtomParser,
+        name="chainItem"
+    )
+
+    return Parsers.leftAssociativeOperatorParser(
+        itemParser,
+        [TokenType.DOT],
+        itemParser,
+        lambda left, op, right: Chain.withValue(BinaryOperator.withValues(left, op, right)),
+        name="chain"
+    )