Refactored parsers to introduce priority

parsers/BnfParser.py

@@ -13,7 +13,7 @@ class UnexpectedEndOfFileError(ErrorNode):
     pass
 
 
-class BnfParser:
+class BnfParser(BaseParser):
     """
     Parser used to transform litteral into ParsingExpression
     example :
@@ -27,10 +27,11 @@ class BnfParser:
 
     """
 
-    def __init__(self):
-        self.has_error = False
-        self.error_sink = []
-        self.name = BaseParser.PREFIX + "Bnf"
+    def __init__(self, **kwargs):
+        super().__init__("Bnf", 50, False)
+        # self.has_error = False
+        # self.error_sink = []
+        # self.name = BaseParser.PREFIX + "Bnf"
 
         self.lexer_iter = None
         self._current = None