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

smnp/ast/node/integer.py

@@ -1,9 +1,31 @@
-from smnp.ast.node.model import Node
+from smnp.ast.node.access import AccessNode
+from smnp.ast.parser import Parser
+from smnp.token.type import TokenType
 
 
-class IntegerLiteralNode(Node):
-    def __init__(self, value, parent, pos):
-        Node.__init__(self, parent, pos)
-        self.children.append(value)
+class IntegerLiteralNode(AccessNode):
+    def __init__(self, pos):
+        super().__init__(pos)
+        del self.children[1]
 
-        self.value = self.children[0]
+    @classmethod
+    def _literalParser(cls):
+        return Parser.oneOf(
+            cls._negativeIntegerParser(),
+            cls._positiveIntegerParser()
+        )
+
+    @classmethod
+    def _negativeIntegerParser(cls):
+        def createNode(minus, integer):
+            return IntegerLiteralNode.withValue(-integer.value, minus.pos)
+
+        return Parser.allOf(
+            Parser.terminalParser(TokenType.MINUS),
+            cls._positiveIntegerParser(),
+            createNode=createNode
+        )
+
+    @classmethod
+    def _positiveIntegerParser(cls):
+        return Parser.terminalParser(TokenType.INTEGER, lambda val, pos: IntegerLiteralNode.withValue(int(val), pos))