Function HandleGetCommand

Source/cmListCommand.cxx:113–153

}

bool HandleGetCommand(std::vector<std::string> const& args,
                      cmExecutionStatus& status)
{
  if (args.size() < 4) {
    status.SetError("sub-command GET requires at least three arguments.");
    return false;
  }

  std::string const& listName = args[1];
  std::string const& variableName = args.back();
  // expand the variable
  auto list = GetList(listName, status.GetMakefile());
  if (!list) {
    status.GetMakefile().AddDefinition(variableName, "NOTFOUND");
    return true;
  }
  // FIXME: Add policy to make non-existing lists an error like empty lists.
  if (list->empty()) {
    status.SetError("GET given empty list");
    return false;
  }

  std::vector<int> indexes;
  for (std::size_t cc = 2; cc < args.size() - 1; cc++) {
    int index;
    if (!GetIndexArg(args[cc], &index, status.GetMakefile())) {
      status.SetError(cmStrCat("index: ", args[cc], " is not a valid index"));
      return false;
    }
    indexes.push_back(index);
  }

  try {
    auto values = list->get_items(indexes.begin(), indexes.end());
    status.GetMakefile().AddDefinition(variableName, values.to_string());
    return true;
  } catch (std::out_of_range& e) {
    status.SetError(e.what());
    return false;
  }
}

bool HandleAppendCommand(std::vector<std::string> const& args,
                         cmExecutionStatus& status)