Method Evaluate

Source/cmGeneratorExpressionNode.cxx:409–445

  int NumExpectedParameters() const override { return 2; }

  std::string Evaluate(
    std::vector<std::string> const& parameters, cm::GenEx::Evaluation* eval,
    GeneratorExpressionContent const* /*content*/,
    cmGeneratorExpressionDAGChecker* /*dagChecker*/) const override
  {
    cmList values;
    cmList checkValues;
    bool check = false;
    switch (eval->Context.LG->GetPolicyStatus(cmPolicies::CMP0085)) {
      case cmPolicies::WARN:
        if (parameters.front().empty()) {
          check = true;
          checkValues.assign(parameters[1], cmList::EmptyElements::Yes);
        }
        CM_FALLTHROUGH;
      case cmPolicies::OLD:
        values.assign(parameters[1]);
        if (check && values != checkValues) {
          std::ostringstream e;
          e << cmPolicies::GetPolicyWarning(cmPolicies::CMP0085)
            << "\nSearch Item:\n  \"" << parameters.front()
            << "\"\nList:\n  \"" << parameters[1] << "\"\n";
          eval->Context.LG->GetCMakeInstance()->IssueMessage(
            MessageType ::AUTHOR_WARNING, e.str(), eval->Backtrace);
          return "0";
        }
        if (values.empty()) {
          return "0";
        }
        break;
      case cmPolicies::NEW:
        values.assign(parameters[1], cmList::EmptyElements::Yes);
        break;
    }

    return values.find(parameters.front()) != cmList::npos ? "1" : "0";
  }
} inListNode;

static const struct FilterNode : public cmGeneratorExpressionNode