Method isReadOnly

Source/cmTarget.cxx:2007–2045

  }

  bool isReadOnly(std::string const& prop, cmMakefile* context,
                  cmTarget* target) const
  {
    auto importedTarget = target->IsImported();
    bool matchingCondition = true;
    if ((!importedTarget && this->Condition == ReadOnlyCondition::Imported) ||
        (importedTarget &&
         this->Condition == ReadOnlyCondition::NonImported)) {
      matchingCondition = false;
    }
    if (!matchingCondition) {
      // Not read-only in this scenario
      return false;
    }

    bool readOnly = true;
    if (!this->Policy) {
      // No policy associated, so is always read-only
      context->IssueMessage(MessageType::FATAL_ERROR,
                            this->message(prop, target));
    } else {
      switch (target->GetPolicyStatus(*this->Policy)) {
        case cmPolicies::WARN:
          context->IssueMessage(
            MessageType::AUTHOR_WARNING,
            cmPolicies::GetPolicyWarning(cmPolicies::CMP0160) + "\n" +
              this->message(prop, target));
          CM_FALLTHROUGH;
        case cmPolicies::OLD:
          readOnly = false;
          break;
        case cmPolicies::NEW:
          context->IssueMessage(MessageType::FATAL_ERROR,
                                this->message(prop, target));
          break;
      }
    }
    return readOnly;
  }
};

bool IsSettableProperty(cmMakefile* context, cmTarget* target,