Working on #48 : Added BaseExprParser and BaseNodeParser.py

src/parsers/BnfDefinitionParser.py

@@ -33,6 +33,7 @@ class BnfDefinitionParser(BaseParser):
         self.context = None
         self.source = ""
         self.sheerka = None
+        self.error_sink = []
 
     def __eq__(self, other):
         if not isinstance(other, BnfDefinitionParser):
@@ -60,6 +61,10 @@ class BnfDefinitionParser(BaseParser):
             self.next_token()
         return error
 
+    @property
+    def has_error(self):
+        return len(self.error_sink) > 0
+
     def get_token(self) -> Token:
         return self._current
 
@@ -123,7 +128,7 @@ class BnfDefinitionParser(BaseParser):
                 False,
                 context.sheerka.new(BuiltinConcepts.ERROR, body=[e]))
 
-        value = self.get_return_value_body(context.sheerka, self.source, tree, tree)
+        value = self.get_return_value_body(context.sheerka, self.source, tree, tree, self.error_sink)
 
         ret = self.sheerka.ret(
             self.name,