Add equal ('==') operator to strings

smnp/ast/node/string.py

@@ -1,17 +1,30 @@
+from smnp.ast.node.access import AccessNode
 from smnp.ast.node.literal import LiteralNode
+from smnp.ast.node.relation import RelationOperatorNode
+from smnp.ast.parser import Parser
 from smnp.token.type import TokenType
 
 
-class StringLiteralNode(LiteralNode):
+class StringLiteralNode(AccessNode, RelationOperatorNode, LiteralNode):
     def __init__(self, pos):
         super().__init__(pos)
-        #TODO del self.children[1]
+        del self.children[1]
 
-
-    # TODO: To Remove
     @classmethod
     def _parse(cls, input):
-        return cls.literalParser()(input)
+        return Parser.oneOf(
+            cls.accessParser(),
+            cls.relationParser(),
+            cls.literalParser()
+        )(input)
+
+    @classmethod
+    def _accessLhs(cls):
+        return cls.literalParser()
+
+    @classmethod
+    def _relationLhs(cls):
+        return cls.literalParser()
 
     @classmethod
     def _getTokenType(cls):