Create ast package

smnp/ast/parsers/integer.py

@@ -0,0 +1,26 @@
+from smnp.ast.node.integer import IntegerLiteralNode
+from smnp.ast.node.percent import PercentNode
+from smnp.token.type import TokenType
+
+
+# int -> INTEGER
+def parseInteger(input, parent):
+    if input.current().type == TokenType.INTEGER:
+        integer = IntegerLiteralNode(int(input.current().value), parent, input.current().pos)
+        input.ahead()
+
+        return integer
+    return None
+
+
+# percent -> int '%'
+# int -> int
+def parseIntegerAndPercent(input, parent):
+    integer = parseInteger(input, parent)
+    if integer is not None and input.hasCurrent() and input.current().type == TokenType.PERCENT:
+        percent = PercentNode(integer, parent, input.current().pos)
+        integer.parent = percent
+        input.ahead()
+
+        return percent
+    return integer