[commands] Pass failed argument's value to BadLiteralArgument

discord/ext/commands/converter.py

@@ -1321,7 +1321,7 @@ async def run_converters(ctx: Context[BotT], converter: Any, argument: str, para
                 return value
 
         # if we're here, then we failed to match all the literals
-        raise BadLiteralArgument(param, literal_args, errors)
+        raise BadLiteralArgument(param, literal_args, errors, argument)
 
     # This must be the last if-clause in the chain of origin checking
     # Nearly every type is a generic type within the typing library

discord/ext/commands/errors.py

@@ -918,12 +918,17 @@ class BadLiteralArgument(UserInputError):
         A tuple of values compared against in conversion, in order of failure.
     errors: List[:class:`CommandError`]
         A list of errors that were caught from failing the conversion.
+    argument: :class:`str`
+        The argument's value that failed to be converted. Defaults to an empty string.
+
+        .. versionadded:: 2.3
     """
 
-    def __init__(self, param: Parameter, literals: Tuple[Any, ...], errors: List[CommandError]) -> None:
+    def __init__(self, param: Parameter, literals: Tuple[Any, ...], errors: List[CommandError], argument: str = "") -> None:
         self.param: Parameter = param
         self.literals: Tuple[Any, ...] = literals
         self.errors: List[CommandError] = errors
+        self.argument: str = argument
 
         to_string = [repr(l) for l in literals]
         if len(to_string) > 2: