Method Evaluate

Source/cmGeneratorExpressionNode.cxx:3933–4179

  }

  std::string Evaluate(
    std::vector<std::string> const& parameters, cm::GenEx::Evaluation* eval,
    GeneratorExpressionContent const* content,
    cmGeneratorExpressionDAGChecker* dagCheckerParent) const override
  {
    static cmsys::RegularExpression propertyNameValidator("^[A-Za-z0-9_]+$");

    cmGeneratorTarget const* target = nullptr;
    std::string targetName;
    std::string propertyName;

    if (parameters.size() == 2) {
      targetName = parameters[0];
      propertyName = parameters[1];

      if (char const* e = GetErrorText(targetName, propertyName)) {
        reportError(eval, content->GetOriginalExpression(), e);
        return std::string();
      }
      if (propertyName == "ALIASED_TARGET"_s) {
        if (eval->Context.LG->GetMakefile()->IsAlias(targetName)) {
          if (cmGeneratorTarget* tgt =
                eval->Context.LG->FindGeneratorTargetToUse(targetName)) {
            return tgt->GetName();
          }
        }
        return std::string();
      }
      if (propertyName == "ALIAS_GLOBAL"_s) {
        if (eval->Context.LG->GetMakefile()->IsAlias(targetName)) {
          return eval->Context.LG->GetGlobalGenerator()->IsAlias(targetName)
            ? "TRUE"
            : "FALSE";
        }
        return std::string();
      }
      cmLocalGenerator const* lg = eval->CurrentTarget
        ? eval->CurrentTarget->GetLocalGenerator()
        : eval->Context.LG;
      target = lg->FindGeneratorTargetToUse(targetName);

      if (!target) {
        std::ostringstream e;
        e << "Target \"" << targetName << "\" not found.";
        reportError(eval, content->GetOriginalExpression(), e.str());
        return std::string();
      }
      eval->AllTargets.insert(target);

    } else if (parameters.size() == 1) {
      target = eval->HeadTarget;
      propertyName = parameters[0];

      // Keep track of the properties seen while processing.
      // The evaluation of the LINK_LIBRARIES generator expressions
      // will check this to ensure that properties have one consistent
      // value for all evaluations.
      eval->SeenTargetProperties.insert(propertyName);