Method Evaluate

Source/cmGeneratorExpressionNode.cxx:3810–3864

  int NumExpectedParameters() const override { return TwoOrMoreParameters; }

  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_]+$");

    if (parameters.size() > 3) {
      reportError(eval, content->GetOriginalExpression(),
                  "$<SOURCE_PROPERTY:...> expression requires at most three "
                  "parameters.");
      return std::string{};
    }

    std::string sourceName = parameters.front();
    std::string const& propertyName = parameters.back();

    if (sourceName.empty() && propertyName.empty()) {
      reportError(eval, content->GetOriginalExpression(),
                  "$<SOURCE_PROPERTY:src,prop> expression requires a "
                  "non-empty source name and property name.");
      return std::string{};
    }
    if (sourceName.empty()) {
      reportError(eval, content->GetOriginalExpression(),
                  "$<SOURCE_PROPERTY:src,prop> expression requires a "
                  "non-empty source name.");
      return std::string{};
    }
    if (propertyName.empty()) {
      reportError(eval, content->GetOriginalExpression(),
                  "$<SOURCE_PROPERTY:src,prop> expression requires a "
                  "non-empty property name.");
      return std::string{};
    }
    if (!propertyNameValidator.find(propertyName)) {
      reportError(eval, content->GetOriginalExpression(),
                  "Property name not supported.");
      return std::string{};
    }

    cmSourceFile* sourceFile = nullptr;
    if (!GetSourceFile(cmMakeRange(parameters).retreat(1), eval, content,
                       sourceFile)) {
      return std::string{};
    }
    if (!sourceFile) {
      reportError(
        eval, content->GetOriginalExpression(),
        cmStrCat("Source file \"", sourceName, "\" is not known from CMake."));
      return std::string{};
    }

    return sourceFile->GetPropertyForUser(propertyName);
  }
} sourcePropertyNode;

static std::string getLinkedTargetsContent(