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      1 //===--- NSAPI.cpp - NSFoundation APIs ------------------------------------===//
      2 //
      3 //                     The LLVM Compiler Infrastructure
      4 //
      5 // This file is distributed under the University of Illinois Open Source
      6 // License. See LICENSE.TXT for details.
      7 //
      8 //===----------------------------------------------------------------------===//
      9 
     10 #include "clang/AST/NSAPI.h"
     11 #include "clang/AST/ASTContext.h"
     12 #include "clang/AST/DeclObjC.h"
     13 #include "clang/AST/Expr.h"
     14 #include "llvm/ADT/StringSwitch.h"
     15 
     16 using namespace clang;
     17 
     18 NSAPI::NSAPI(ASTContext &ctx)
     19   : Ctx(ctx), ClassIds(), BOOLId(nullptr), NSIntegerId(nullptr),
     20     NSUIntegerId(nullptr), NSASCIIStringEncodingId(nullptr),
     21     NSUTF8StringEncodingId(nullptr) {}
     22 
     23 IdentifierInfo *NSAPI::getNSClassId(NSClassIdKindKind K) const {
     24   static const char *ClassName[NumClassIds] = {
     25     "NSObject",
     26     "NSString",
     27     "NSArray",
     28     "NSMutableArray",
     29     "NSDictionary",
     30     "NSMutableDictionary",
     31     "NSNumber",
     32     "NSMutableSet",
     33     "NSMutableOrderedSet",
     34     "NSValue"
     35   };
     36 
     37   if (!ClassIds[K])
     38     return (ClassIds[K] = &Ctx.Idents.get(ClassName[K]));
     39 
     40   return ClassIds[K];
     41 }
     42 
     43 Selector NSAPI::getNSStringSelector(NSStringMethodKind MK) const {
     44   if (NSStringSelectors[MK].isNull()) {
     45     Selector Sel;
     46     switch (MK) {
     47     case NSStr_stringWithString:
     48       Sel = Ctx.Selectors.getUnarySelector(&Ctx.Idents.get("stringWithString"));
     49       break;
     50     case NSStr_stringWithUTF8String:
     51       Sel = Ctx.Selectors.getUnarySelector(
     52                                        &Ctx.Idents.get("stringWithUTF8String"));
     53       break;
     54     case NSStr_initWithUTF8String:
     55       Sel = Ctx.Selectors.getUnarySelector(
     56                                        &Ctx.Idents.get("initWithUTF8String"));
     57       break;
     58     case NSStr_stringWithCStringEncoding: {
     59       IdentifierInfo *KeyIdents[] = {
     60         &Ctx.Idents.get("stringWithCString"),
     61         &Ctx.Idents.get("encoding")
     62       };
     63       Sel = Ctx.Selectors.getSelector(2, KeyIdents);
     64       break;
     65     }
     66     case NSStr_stringWithCString:
     67       Sel= Ctx.Selectors.getUnarySelector(&Ctx.Idents.get("stringWithCString"));
     68       break;
     69     case NSStr_initWithString:
     70       Sel = Ctx.Selectors.getUnarySelector(&Ctx.Idents.get("initWithString"));
     71       break;
     72     }
     73     return (NSStringSelectors[MK] = Sel);
     74   }
     75 
     76   return NSStringSelectors[MK];
     77 }
     78 
     79 Optional<NSAPI::NSStringMethodKind>
     80 NSAPI::getNSStringMethodKind(Selector Sel) const {
     81   for (unsigned i = 0; i != NumNSStringMethods; ++i) {
     82     NSStringMethodKind MK = NSStringMethodKind(i);
     83     if (Sel == getNSStringSelector(MK))
     84       return MK;
     85   }
     86 
     87   return None;
     88 }
     89 
     90 Selector NSAPI::getNSArraySelector(NSArrayMethodKind MK) const {
     91   if (NSArraySelectors[MK].isNull()) {
     92     Selector Sel;
     93     switch (MK) {
     94     case NSArr_array:
     95       Sel = Ctx.Selectors.getNullarySelector(&Ctx.Idents.get("array"));
     96       break;
     97     case NSArr_arrayWithArray:
     98       Sel = Ctx.Selectors.getUnarySelector(&Ctx.Idents.get("arrayWithArray"));
     99       break;
    100     case NSArr_arrayWithObject:
    101       Sel = Ctx.Selectors.getUnarySelector(&Ctx.Idents.get("arrayWithObject"));
    102       break;
    103     case NSArr_arrayWithObjects:
    104       Sel = Ctx.Selectors.getUnarySelector(&Ctx.Idents.get("arrayWithObjects"));
    105       break;
    106     case NSArr_arrayWithObjectsCount: {
    107       IdentifierInfo *KeyIdents[] = {
    108         &Ctx.Idents.get("arrayWithObjects"),
    109         &Ctx.Idents.get("count")
    110       };
    111       Sel = Ctx.Selectors.getSelector(2, KeyIdents);
    112       break;
    113     }
    114     case NSArr_initWithArray:
    115       Sel = Ctx.Selectors.getUnarySelector(&Ctx.Idents.get("initWithArray"));
    116       break;
    117     case NSArr_initWithObjects:
    118       Sel = Ctx.Selectors.getUnarySelector(&Ctx.Idents.get("initWithObjects"));
    119       break;
    120     case NSArr_objectAtIndex:
    121       Sel = Ctx.Selectors.getUnarySelector(&Ctx.Idents.get("objectAtIndex"));
    122       break;
    123     case NSMutableArr_replaceObjectAtIndex: {
    124       IdentifierInfo *KeyIdents[] = {
    125         &Ctx.Idents.get("replaceObjectAtIndex"),
    126         &Ctx.Idents.get("withObject")
    127       };
    128       Sel = Ctx.Selectors.getSelector(2, KeyIdents);
    129       break;
    130     }
    131     case NSMutableArr_addObject:
    132       Sel = Ctx.Selectors.getUnarySelector(&Ctx.Idents.get("addObject"));
    133       break;
    134     case NSMutableArr_insertObjectAtIndex: {
    135       IdentifierInfo *KeyIdents[] = {
    136         &Ctx.Idents.get("insertObject"),
    137         &Ctx.Idents.get("atIndex")
    138       };
    139       Sel = Ctx.Selectors.getSelector(2, KeyIdents);
    140       break;
    141     }
    142     case NSMutableArr_setObjectAtIndexedSubscript: {
    143       IdentifierInfo *KeyIdents[] = {
    144         &Ctx.Idents.get("setObject"),
    145         &Ctx.Idents.get("atIndexedSubscript")
    146       };
    147       Sel = Ctx.Selectors.getSelector(2, KeyIdents);
    148       break;
    149     }
    150     }
    151     return (NSArraySelectors[MK] = Sel);
    152   }
    153 
    154   return NSArraySelectors[MK];
    155 }
    156 
    157 Optional<NSAPI::NSArrayMethodKind> NSAPI::getNSArrayMethodKind(Selector Sel) {
    158   for (unsigned i = 0; i != NumNSArrayMethods; ++i) {
    159     NSArrayMethodKind MK = NSArrayMethodKind(i);
    160     if (Sel == getNSArraySelector(MK))
    161       return MK;
    162   }
    163 
    164   return None;
    165 }
    166 
    167 Selector NSAPI::getNSDictionarySelector(
    168                                        NSDictionaryMethodKind MK) const {
    169   if (NSDictionarySelectors[MK].isNull()) {
    170     Selector Sel;
    171     switch (MK) {
    172     case NSDict_dictionary:
    173       Sel = Ctx.Selectors.getNullarySelector(&Ctx.Idents.get("dictionary"));
    174       break;
    175     case NSDict_dictionaryWithDictionary:
    176       Sel = Ctx.Selectors.getUnarySelector(
    177                                    &Ctx.Idents.get("dictionaryWithDictionary"));
    178       break;
    179     case NSDict_dictionaryWithObjectForKey: {
    180       IdentifierInfo *KeyIdents[] = {
    181         &Ctx.Idents.get("dictionaryWithObject"),
    182         &Ctx.Idents.get("forKey")
    183       };
    184       Sel = Ctx.Selectors.getSelector(2, KeyIdents);
    185       break;
    186     }
    187     case NSDict_dictionaryWithObjectsForKeys: {
    188       IdentifierInfo *KeyIdents[] = {
    189         &Ctx.Idents.get("dictionaryWithObjects"),
    190         &Ctx.Idents.get("forKeys")
    191       };
    192       Sel = Ctx.Selectors.getSelector(2, KeyIdents);
    193       break;
    194     }
    195     case NSDict_dictionaryWithObjectsForKeysCount: {
    196       IdentifierInfo *KeyIdents[] = {
    197         &Ctx.Idents.get("dictionaryWithObjects"),
    198         &Ctx.Idents.get("forKeys"),
    199         &Ctx.Idents.get("count")
    200       };
    201       Sel = Ctx.Selectors.getSelector(3, KeyIdents);
    202       break;
    203     }
    204     case NSDict_dictionaryWithObjectsAndKeys:
    205       Sel = Ctx.Selectors.getUnarySelector(
    206                                &Ctx.Idents.get("dictionaryWithObjectsAndKeys"));
    207       break;
    208     case NSDict_initWithDictionary:
    209       Sel = Ctx.Selectors.getUnarySelector(
    210                                          &Ctx.Idents.get("initWithDictionary"));
    211       break;
    212     case NSDict_initWithObjectsAndKeys:
    213       Sel = Ctx.Selectors.getUnarySelector(
    214                                      &Ctx.Idents.get("initWithObjectsAndKeys"));
    215       break;
    216     case NSDict_initWithObjectsForKeys: {
    217       IdentifierInfo *KeyIdents[] = {
    218         &Ctx.Idents.get("initWithObjects"),
    219         &Ctx.Idents.get("forKeys")
    220       };
    221       Sel = Ctx.Selectors.getSelector(2, KeyIdents);
    222       break;
    223     }
    224     case NSDict_objectForKey:
    225       Sel = Ctx.Selectors.getUnarySelector(&Ctx.Idents.get("objectForKey"));
    226       break;
    227     case NSMutableDict_setObjectForKey: {
    228       IdentifierInfo *KeyIdents[] = {
    229         &Ctx.Idents.get("setObject"),
    230         &Ctx.Idents.get("forKey")
    231       };
    232       Sel = Ctx.Selectors.getSelector(2, KeyIdents);
    233       break;
    234     }
    235     case NSMutableDict_setObjectForKeyedSubscript: {
    236       IdentifierInfo *KeyIdents[] = {
    237         &Ctx.Idents.get("setObject"),
    238         &Ctx.Idents.get("forKeyedSubscript")
    239       };
    240       Sel = Ctx.Selectors.getSelector(2, KeyIdents);
    241       break;
    242     }
    243     case NSMutableDict_setValueForKey: {
    244       IdentifierInfo *KeyIdents[] = {
    245         &Ctx.Idents.get("setValue"),
    246         &Ctx.Idents.get("forKey")
    247       };
    248       Sel = Ctx.Selectors.getSelector(2, KeyIdents);
    249       break;
    250     }
    251     }
    252     return (NSDictionarySelectors[MK] = Sel);
    253   }
    254 
    255   return NSDictionarySelectors[MK];
    256 }
    257 
    258 Optional<NSAPI::NSDictionaryMethodKind>
    259 NSAPI::getNSDictionaryMethodKind(Selector Sel) {
    260   for (unsigned i = 0; i != NumNSDictionaryMethods; ++i) {
    261     NSDictionaryMethodKind MK = NSDictionaryMethodKind(i);
    262     if (Sel == getNSDictionarySelector(MK))
    263       return MK;
    264   }
    265 
    266   return None;
    267 }
    268 
    269 Selector NSAPI::getNSSetSelector(NSSetMethodKind MK) const {
    270   if (NSSetSelectors[MK].isNull()) {
    271     Selector Sel;
    272     switch (MK) {
    273     case NSMutableSet_addObject:
    274       Sel = Ctx.Selectors.getUnarySelector(&Ctx.Idents.get("addObject"));
    275       break;
    276     case NSOrderedSet_insertObjectAtIndex: {
    277       IdentifierInfo *KeyIdents[] = {
    278         &Ctx.Idents.get("insertObject"),
    279         &Ctx.Idents.get("atIndex")
    280       };
    281       Sel = Ctx.Selectors.getSelector(2, KeyIdents);
    282       break;
    283     }
    284     case NSOrderedSet_setObjectAtIndex: {
    285       IdentifierInfo *KeyIdents[] = {
    286         &Ctx.Idents.get("setObject"),
    287         &Ctx.Idents.get("atIndex")
    288       };
    289       Sel = Ctx.Selectors.getSelector(2, KeyIdents);
    290       break;
    291     }
    292     case NSOrderedSet_setObjectAtIndexedSubscript: {
    293       IdentifierInfo *KeyIdents[] = {
    294         &Ctx.Idents.get("setObject"),
    295         &Ctx.Idents.get("atIndexedSubscript")
    296       };
    297       Sel = Ctx.Selectors.getSelector(2, KeyIdents);
    298       break;
    299     }
    300     case NSOrderedSet_replaceObjectAtIndexWithObject: {
    301       IdentifierInfo *KeyIdents[] = {
    302         &Ctx.Idents.get("replaceObjectAtIndex"),
    303         &Ctx.Idents.get("withObject")
    304       };
    305       Sel = Ctx.Selectors.getSelector(2, KeyIdents);
    306       break;
    307     }
    308     }
    309     return (NSSetSelectors[MK] = Sel);
    310   }
    311 
    312   return NSSetSelectors[MK];
    313 }
    314 
    315 Optional<NSAPI::NSSetMethodKind>
    316 NSAPI::getNSSetMethodKind(Selector Sel) {
    317   for (unsigned i = 0; i != NumNSSetMethods; ++i) {
    318     NSSetMethodKind MK = NSSetMethodKind(i);
    319     if (Sel == getNSSetSelector(MK))
    320       return MK;
    321   }
    322 
    323   return None;
    324 }
    325 
    326 Selector NSAPI::getNSNumberLiteralSelector(NSNumberLiteralMethodKind MK,
    327                                            bool Instance) const {
    328   static const char *ClassSelectorName[NumNSNumberLiteralMethods] = {
    329     "numberWithChar",
    330     "numberWithUnsignedChar",
    331     "numberWithShort",
    332     "numberWithUnsignedShort",
    333     "numberWithInt",
    334     "numberWithUnsignedInt",
    335     "numberWithLong",
    336     "numberWithUnsignedLong",
    337     "numberWithLongLong",
    338     "numberWithUnsignedLongLong",
    339     "numberWithFloat",
    340     "numberWithDouble",
    341     "numberWithBool",
    342     "numberWithInteger",
    343     "numberWithUnsignedInteger"
    344   };
    345   static const char *InstanceSelectorName[NumNSNumberLiteralMethods] = {
    346     "initWithChar",
    347     "initWithUnsignedChar",
    348     "initWithShort",
    349     "initWithUnsignedShort",
    350     "initWithInt",
    351     "initWithUnsignedInt",
    352     "initWithLong",
    353     "initWithUnsignedLong",
    354     "initWithLongLong",
    355     "initWithUnsignedLongLong",
    356     "initWithFloat",
    357     "initWithDouble",
    358     "initWithBool",
    359     "initWithInteger",
    360     "initWithUnsignedInteger"
    361   };
    362 
    363   Selector *Sels;
    364   const char **Names;
    365   if (Instance) {
    366     Sels = NSNumberInstanceSelectors;
    367     Names = InstanceSelectorName;
    368   } else {
    369     Sels = NSNumberClassSelectors;
    370     Names = ClassSelectorName;
    371   }
    372 
    373   if (Sels[MK].isNull())
    374     Sels[MK] = Ctx.Selectors.getUnarySelector(&Ctx.Idents.get(Names[MK]));
    375   return Sels[MK];
    376 }
    377 
    378 Optional<NSAPI::NSNumberLiteralMethodKind>
    379 NSAPI::getNSNumberLiteralMethodKind(Selector Sel) const {
    380   for (unsigned i = 0; i != NumNSNumberLiteralMethods; ++i) {
    381     NSNumberLiteralMethodKind MK = NSNumberLiteralMethodKind(i);
    382     if (isNSNumberLiteralSelector(MK, Sel))
    383       return MK;
    384   }
    385 
    386   return None;
    387 }
    388 
    389 Optional<NSAPI::NSNumberLiteralMethodKind>
    390 NSAPI::getNSNumberFactoryMethodKind(QualType T) const {
    391   const BuiltinType *BT = T->getAs<BuiltinType>();
    392   if (!BT)
    393     return None;
    394 
    395   const TypedefType *TDT = T->getAs<TypedefType>();
    396   if (TDT) {
    397     QualType TDTTy = QualType(TDT, 0);
    398     if (isObjCBOOLType(TDTTy))
    399       return NSAPI::NSNumberWithBool;
    400     if (isObjCNSIntegerType(TDTTy))
    401       return NSAPI::NSNumberWithInteger;
    402     if (isObjCNSUIntegerType(TDTTy))
    403       return NSAPI::NSNumberWithUnsignedInteger;
    404   }
    405 
    406   switch (BT->getKind()) {
    407   case BuiltinType::Char_S:
    408   case BuiltinType::SChar:
    409     return NSAPI::NSNumberWithChar;
    410   case BuiltinType::Char_U:
    411   case BuiltinType::UChar:
    412     return NSAPI::NSNumberWithUnsignedChar;
    413   case BuiltinType::Short:
    414     return NSAPI::NSNumberWithShort;
    415   case BuiltinType::UShort:
    416     return NSAPI::NSNumberWithUnsignedShort;
    417   case BuiltinType::Int:
    418     return NSAPI::NSNumberWithInt;
    419   case BuiltinType::UInt:
    420     return NSAPI::NSNumberWithUnsignedInt;
    421   case BuiltinType::Long:
    422     return NSAPI::NSNumberWithLong;
    423   case BuiltinType::ULong:
    424     return NSAPI::NSNumberWithUnsignedLong;
    425   case BuiltinType::LongLong:
    426     return NSAPI::NSNumberWithLongLong;
    427   case BuiltinType::ULongLong:
    428     return NSAPI::NSNumberWithUnsignedLongLong;
    429   case BuiltinType::Float:
    430     return NSAPI::NSNumberWithFloat;
    431   case BuiltinType::Double:
    432     return NSAPI::NSNumberWithDouble;
    433   case BuiltinType::Bool:
    434     return NSAPI::NSNumberWithBool;
    435 
    436   case BuiltinType::Void:
    437   case BuiltinType::WChar_U:
    438   case BuiltinType::WChar_S:
    439   case BuiltinType::Char16:
    440   case BuiltinType::Char32:
    441   case BuiltinType::Int128:
    442   case BuiltinType::LongDouble:
    443   case BuiltinType::UInt128:
    444   case BuiltinType::NullPtr:
    445   case BuiltinType::ObjCClass:
    446   case BuiltinType::ObjCId:
    447   case BuiltinType::ObjCSel:
    448   case BuiltinType::OCLImage1d:
    449   case BuiltinType::OCLImage1dArray:
    450   case BuiltinType::OCLImage1dBuffer:
    451   case BuiltinType::OCLImage2d:
    452   case BuiltinType::OCLImage2dArray:
    453   case BuiltinType::OCLImage2dDepth:
    454   case BuiltinType::OCLImage2dArrayDepth:
    455   case BuiltinType::OCLImage2dMSAA:
    456   case BuiltinType::OCLImage2dArrayMSAA:
    457   case BuiltinType::OCLImage2dMSAADepth:
    458   case BuiltinType::OCLImage2dArrayMSAADepth:
    459   case BuiltinType::OCLImage3d:
    460   case BuiltinType::OCLSampler:
    461   case BuiltinType::OCLEvent:
    462   case BuiltinType::OCLClkEvent:
    463   case BuiltinType::OCLQueue:
    464   case BuiltinType::OCLNDRange:
    465   case BuiltinType::OCLReserveID:
    466   case BuiltinType::BoundMember:
    467   case BuiltinType::Dependent:
    468   case BuiltinType::Overload:
    469   case BuiltinType::UnknownAny:
    470   case BuiltinType::ARCUnbridgedCast:
    471   case BuiltinType::Half:
    472   case BuiltinType::PseudoObject:
    473   case BuiltinType::BuiltinFn:
    474   case BuiltinType::OMPArraySection:
    475     break;
    476   }
    477 
    478   return None;
    479 }
    480 
    481 /// \brief Returns true if \param T is a typedef of "BOOL" in objective-c.
    482 bool NSAPI::isObjCBOOLType(QualType T) const {
    483   return isObjCTypedef(T, "BOOL", BOOLId);
    484 }
    485 /// \brief Returns true if \param T is a typedef of "NSInteger" in objective-c.
    486 bool NSAPI::isObjCNSIntegerType(QualType T) const {
    487   return isObjCTypedef(T, "NSInteger", NSIntegerId);
    488 }
    489 /// \brief Returns true if \param T is a typedef of "NSUInteger" in objective-c.
    490 bool NSAPI::isObjCNSUIntegerType(QualType T) const {
    491   return isObjCTypedef(T, "NSUInteger", NSUIntegerId);
    492 }
    493 
    494 StringRef NSAPI::GetNSIntegralKind(QualType T) const {
    495   if (!Ctx.getLangOpts().ObjC1 || T.isNull())
    496     return StringRef();
    497 
    498   while (const TypedefType *TDT = T->getAs<TypedefType>()) {
    499     StringRef NSIntegralResust =
    500       llvm::StringSwitch<StringRef>(
    501         TDT->getDecl()->getDeclName().getAsIdentifierInfo()->getName())
    502     .Case("int8_t", "int8_t")
    503     .Case("int16_t", "int16_t")
    504     .Case("int32_t", "int32_t")
    505     .Case("NSInteger", "NSInteger")
    506     .Case("int64_t", "int64_t")
    507     .Case("uint8_t", "uint8_t")
    508     .Case("uint16_t", "uint16_t")
    509     .Case("uint32_t", "uint32_t")
    510     .Case("NSUInteger", "NSUInteger")
    511     .Case("uint64_t", "uint64_t")
    512     .Default(StringRef());
    513     if (!NSIntegralResust.empty())
    514       return NSIntegralResust;
    515     T = TDT->desugar();
    516   }
    517   return StringRef();
    518 }
    519 
    520 bool NSAPI::isMacroDefined(StringRef Id) const {
    521   // FIXME: Check whether the relevant module macros are visible.
    522   return Ctx.Idents.get(Id).hasMacroDefinition();
    523 }
    524 
    525 bool NSAPI::isSubclassOfNSClass(ObjCInterfaceDecl *InterfaceDecl,
    526                                 NSClassIdKindKind NSClassKind) const {
    527   if (!InterfaceDecl) {
    528     return false;
    529   }
    530 
    531   IdentifierInfo *NSClassID = getNSClassId(NSClassKind);
    532 
    533   bool IsSubclass = false;
    534   do {
    535     IsSubclass = NSClassID == InterfaceDecl->getIdentifier();
    536 
    537     if (IsSubclass) {
    538       break;
    539     }
    540   } while ((InterfaceDecl = InterfaceDecl->getSuperClass()));
    541 
    542   return IsSubclass;
    543 }
    544 
    545 bool NSAPI::isObjCTypedef(QualType T,
    546                           StringRef name, IdentifierInfo *&II) const {
    547   if (!Ctx.getLangOpts().ObjC1)
    548     return false;
    549   if (T.isNull())
    550     return false;
    551 
    552   if (!II)
    553     II = &Ctx.Idents.get(name);
    554 
    555   while (const TypedefType *TDT = T->getAs<TypedefType>()) {
    556     if (TDT->getDecl()->getDeclName().getAsIdentifierInfo() == II)
    557       return true;
    558     T = TDT->desugar();
    559   }
    560 
    561   return false;
    562 }
    563 
    564 bool NSAPI::isObjCEnumerator(const Expr *E,
    565                              StringRef name, IdentifierInfo *&II) const {
    566   if (!Ctx.getLangOpts().ObjC1)
    567     return false;
    568   if (!E)
    569     return false;
    570 
    571   if (!II)
    572     II = &Ctx.Idents.get(name);
    573 
    574   if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E->IgnoreParenImpCasts()))
    575     if (const EnumConstantDecl *
    576           EnumD = dyn_cast_or_null<EnumConstantDecl>(DRE->getDecl()))
    577       return EnumD->getIdentifier() == II;
    578 
    579   return false;
    580 }
    581 
    582 Selector NSAPI::getOrInitSelector(ArrayRef<StringRef> Ids,
    583                                   Selector &Sel) const {
    584   if (Sel.isNull()) {
    585     SmallVector<IdentifierInfo *, 4> Idents;
    586     for (ArrayRef<StringRef>::const_iterator
    587            I = Ids.begin(), E = Ids.end(); I != E; ++I)
    588       Idents.push_back(&Ctx.Idents.get(*I));
    589     Sel = Ctx.Selectors.getSelector(Idents.size(), Idents.data());
    590   }
    591   return Sel;
    592 }
    593