Method Evaluate

Source/cmGeneratorExpressionNode.cxx:3551–3579

  int NumExpectedParameters() const override { return ZeroOrMoreParameters; }

  std::string Evaluate(
    std::vector<std::string> const& parameters, cm::GenEx::Evaluation* eval,
    GeneratorExpressionContent const* content,
    cmGeneratorExpressionDAGChecker* dagChecker) const override
  {
    if (!eval->HeadTarget || !dagChecker ||
        !dagChecker->EvaluatingLinkOptionsExpression()) {
      reportError(eval, content->GetOriginalExpression(),
                  "$<DEVICE_LINK:...> may only be used with binary targets "
                  "to specify link options.");
      return std::string();
    }

    if (eval->HeadTarget->IsDeviceLink()) {
      cmList list{ parameters.begin(), parameters.end() };
      auto const DL_BEGIN = "<DEVICE_LINK>"_s;
      auto const DL_END = "</DEVICE_LINK>"_s;
      cm::erase_if(list, [&](std::string const& item) {
        return item == DL_BEGIN || item == DL_END;
      });

      list.insert(list.begin(), static_cast<std::string>(DL_BEGIN));
      list.push_back(static_cast<std::string>(DL_END));

      return list.to_string();
    }

    return std::string();
  }
} deviceLinkNode;

namespace {