Implemented some enhancement requests

src/parsers/BnfDefinitionParser.py

@@ -1,19 +1,12 @@
-from dataclasses import dataclass
-
 import core.utils
 from core.builtin_concepts import BuiltinConcepts
 from core.sheerka.Sheerka import ExecutionContext
 from core.tokenizer import Tokenizer, Token, TokenKind, LexerError
-from parsers.BaseParser import BaseParser, ErrorNode, UnexpectedTokenErrorNode
+from parsers.BaseParser import BaseParser, UnexpectedTokenParsingError, UnexpectedEofParsingError
 from parsers.BnfNodeParser import OrderedChoice, Sequence, Optional, ZeroOrMore, OneOrMore, \
     ConceptExpression, StrMatch
 
 
-@dataclass()
-class UnexpectedEndOfFileError(ErrorNode):
-    pass
-
-
 class BnfDefinitionParser(BaseParser):
     """
     Parser used to transform literal into ParsingExpression
@@ -52,7 +45,7 @@ class BnfDefinitionParser(BaseParser):
         self.context = context
         self.sheerka = context.sheerka
         self.source = ""
-        
+
         self.lexer_iter = iter(Tokenizer(text.strip())) if isinstance(text, str) else iter(text)
         self._current = None
         self.after_current = None
@@ -123,7 +116,7 @@ class BnfDefinitionParser(BaseParser):
 
             token = self.get_token()
             if token and token.type != TokenKind.EOF:
-                self.add_error(UnexpectedTokenErrorNode(f"Unexpected token '{token}'", token, []))
+                self.add_error(UnexpectedTokenParsingError(f"Unexpected token '{token}'", token, []))
         except LexerError as e:
             return self.sheerka.ret(
                 self.name,
@@ -221,7 +214,7 @@ class BnfDefinitionParser(BaseParser):
     def parse_expression(self):
         token = self.get_token()
         if token.type == TokenKind.EOF:
-            self.add_error(UnexpectedEndOfFileError(), False)
+            self.add_error(UnexpectedEofParsingError(), False)
         if token.type == TokenKind.LPAR:
             self.nb_open_par += 1
             self.next_token()
@@ -232,7 +225,7 @@ class BnfDefinitionParser(BaseParser):
                 self.next_token()
                 return self.eat_rule_name_if_needed(expr)
             else:
-                self.add_error(UnexpectedTokenErrorNode(f"Unexpected token '{token}'", token, [TokenKind.RPAR]))
+                self.add_error(UnexpectedTokenParsingError(f"Unexpected token '{token}'", token, [TokenKind.RPAR]))
                 return expr
 
         if token.type == TokenKind.CONCEPT:
@@ -291,7 +284,7 @@ class BnfDefinitionParser(BaseParser):
 
             if token is None or token.type != TokenKind.IDENTIFIER:
                 return self.add_error(
-                    UnexpectedTokenErrorNode(f"Unexpected token '{token}'", token, [TokenKind.IDENTIFIER]))
+                    UnexpectedTokenParsingError(f"Unexpected token '{token}'", token, [TokenKind.IDENTIFIER]))
 
             expression.rule_name = token.value
             self.next_token()