// fills collections with of imported languages and devkits.
// Languages include directly imported and coming immediately through devkits; listed devkits are
// imported directly, without those they extend (why?).
public LangAndDevkits collectLanguagesAndDevkits() {
Set<SLanguage> usedLanguages = new LinkedHashSet<>();
Set<SModuleReference> devkits = new LinkedHashSet<>();
// perhaps, shall introduce ModuleImports similar to ModelImports to accomplish this?
for (SModel m : getModels()) {
final SModelInternal modelInternal = (SModelInternal) m;
usedLanguages.addAll(modelInternal.importedLanguageIds());
devkits.addAll(modelInternal.importedDevkits());
}
// XXX why don't we respect extended devkits here?
final SRepository repository = getRepository();
if (repository != null) {
for (SModuleReference devkitRef : devkits) {
final SModule module = devkitRef.resolve(repository);
if (module instanceof DevKit) {
for (SLanguage l : ((DevKit) module).getAllExportedLanguageIds()) {
usedLanguages.add(l);
}
}
}
}
usedLanguages.add(BootstrapLanguages.getLangCore());
return new LangAndDevkits(usedLanguages, devkits);
}
public static boolean checkCyclicInheritance(Language lang) {
List<Language> frontier = ModuleUtil.refsToLanguages(lang.getExtendedLanguageRefs());
ArrayList<Language> passed = new ArrayList<Language>();
while (!frontier.isEmpty()) {
List<Language> newFrontier = new ArrayList<Language>();
for (Language extendedLang : frontier) {
if (extendedLang == lang && lang != BootstrapLanguages.coreLanguage()) {
return false;
}
if (!passed.contains(extendedLang)) {
newFrontier.addAll(ModuleUtil.refsToLanguages(extendedLang.getExtendedLanguageRefs()));
}
passed.add(extendedLang);
}
frontier = newFrontier;
}
return true;
}
@Override
protected Set<Language> getInitialUsedLanguages() {
HashSet<Language> result = new HashSet<Language>();
for (SLanguage l : AbstractModule.this.getUsedLanguages()) {
SModule langModule = l.getSourceModule();
if (langModule instanceof Language) {
result.add((Language) langModule);
}
}
if (AbstractModule.this instanceof Language) {
result.add((Language) AbstractModule.this);
// XXX why Language(SModule)#getUsedLanguages doesn't care about descriptor language being
// used?
result.add(
ModuleRepositoryFacade.getInstance()
.getModule(BootstrapLanguages.descriptorLanguageRef(), Language.class));
}
if (AbstractModule.this instanceof Generator) {
result.add(((Generator) AbstractModule.this).getSourceLanguage());
}
return result;
}