Function CheckArityImpl

cpp/src/arrow/compute/function.cc:84–96

const FunctionDoc& FunctionDoc::Empty() { return kEmptyFunctionDoc; }

static Status CheckArityImpl(const Function& func, int num_args) {
  if (func.arity().is_varargs && num_args < func.arity().num_args) {
    return Status::Invalid("VarArgs function '", func.name(), "' needs at least ",
                           func.arity().num_args, " arguments but only ", num_args,
                           " passed");
  }

  if (!func.arity().is_varargs && num_args != func.arity().num_args) {
    return Status::Invalid("Function '", func.name(), "' accepts ", func.arity().num_args,
                           " arguments but ", num_args, " passed");
  }
  return Status::OK();
}

Status Function::CheckArity(size_t num_args) const {
  return CheckArityImpl(*this, static_cast<int>(num_args));