Method maybe_note_concatenate_pos_args

mypy/messages.py:855–885

(
        self,
        original_caller_type: ProperType,
        callee_type: ProperType,
        context: Context,
        code: ErrorCode | None = None,
    )

        )

    def maybe_note_concatenate_pos_args(
        self,
        original_caller_type: ProperType,
        callee_type: ProperType,
        context: Context,
        code: ErrorCode | None = None,
    ) -> None:
        # pos-only vs positional can be confusing, with Concatenate
        if (
            isinstance(callee_type, CallableType)
            and isinstance(original_caller_type, CallableType)
            and (original_caller_type.from_concatenate or callee_type.from_concatenate)
        ):
            names: list[str] = []
            for c, o in zip(
                callee_type.formal_arguments(), original_caller_type.formal_arguments()
            ):
                if None in (c.pos, o.pos):
                    # non-positional
                    continue
                if c.name != o.name and c.name is None and o.name is not None:
                    names.append(o.name)

            if names:
                missing_arguments = '"' + '", "'.join(names) + '"'
                self.note(
                    f'This is likely because "{original_caller_type.name}" has named arguments: '
                    f"{missing_arguments}. Consider marking them positional-only",
                    context,
                    code=code,
                )

    def invalid_index_type(
        self,