1 //===--- TypePrinter.cpp - Pretty-Print Clang Types -----------------------===//
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 // This contains code to print types from Clang's type system.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #include "clang/AST/PrettyPrinter.h"
15 #include "clang/AST/ASTContext.h"
16 #include "clang/AST/Decl.h"
17 #include "clang/AST/DeclObjC.h"
18 #include "clang/AST/DeclTemplate.h"
19 #include "clang/AST/Expr.h"
20 #include "clang/AST/Type.h"
21 #include "clang/Basic/LangOptions.h"
22 #include "clang/Basic/SourceManager.h"
23 #include "llvm/ADT/SmallString.h"
24 #include "llvm/ADT/StringExtras.h"
25 #include "llvm/Support/SaveAndRestore.h"
26 #include "llvm/Support/raw_ostream.h"
27 using namespace clang;
28 
29 namespace {
30   /// \brief RAII object that enables printing of the ARC __strong lifetime
31   /// qualifier.
32   class IncludeStrongLifetimeRAII {
33     PrintingPolicy &Policy;
34     bool Old;
35 
36   public:
37     explicit IncludeStrongLifetimeRAII(PrintingPolicy &Policy)
38       : Policy(Policy), Old(Policy.SuppressStrongLifetime) {
39         if (!Policy.SuppressLifetimeQualifiers)
40           Policy.SuppressStrongLifetime = false;
41     }
42 
43     ~IncludeStrongLifetimeRAII() {
44       Policy.SuppressStrongLifetime = Old;
45     }
46   };
47 
48   class ParamPolicyRAII {
49     PrintingPolicy &Policy;
50     bool Old;
51 
52   public:
53     explicit ParamPolicyRAII(PrintingPolicy &Policy)
54       : Policy(Policy), Old(Policy.SuppressSpecifiers) {
55       Policy.SuppressSpecifiers = false;
56     }
57 
58     ~ParamPolicyRAII() {
59       Policy.SuppressSpecifiers = Old;
60     }
61   };
62 
63   class ElaboratedTypePolicyRAII {
64     PrintingPolicy &Policy;
65     bool SuppressTagKeyword;
66     bool SuppressScope;
67 
68   public:
69     explicit ElaboratedTypePolicyRAII(PrintingPolicy &Policy) : Policy(Policy) {
70       SuppressTagKeyword = Policy.SuppressTagKeyword;
71       SuppressScope = Policy.SuppressScope;
72       Policy.SuppressTagKeyword = true;
73       Policy.SuppressScope = true;
74     }
75 
76     ~ElaboratedTypePolicyRAII() {
77       Policy.SuppressTagKeyword = SuppressTagKeyword;
78       Policy.SuppressScope = SuppressScope;
79     }
80   };
81 
82   class TypePrinter {
83     PrintingPolicy Policy;
84     bool HasEmptyPlaceHolder;
85     bool InsideCCAttribute;
86 
87   public:
88     explicit TypePrinter(const PrintingPolicy &Policy)
89       : Policy(Policy), HasEmptyPlaceHolder(false), InsideCCAttribute(false) { }
90 
91     void print(const Type *ty, Qualifiers qs, raw_ostream &OS,
92                StringRef PlaceHolder);
93     void print(QualType T, raw_ostream &OS, StringRef PlaceHolder);
94 
95     static bool canPrefixQualifiers(const Type *T, bool &NeedARCStrongQualifier);
96     void spaceBeforePlaceHolder(raw_ostream &OS);
97     void printTypeSpec(const NamedDecl *D, raw_ostream &OS);
98 
99     void printBefore(const Type *ty, Qualifiers qs, raw_ostream &OS);
100     void printBefore(QualType T, raw_ostream &OS);
101     void printAfter(const Type *ty, Qualifiers qs, raw_ostream &OS);
102     void printAfter(QualType T, raw_ostream &OS);
103     void AppendScope(DeclContext *DC, raw_ostream &OS);
104     void printTag(TagDecl *T, raw_ostream &OS);
105 #define ABSTRACT_TYPE(CLASS, PARENT)
106 #define TYPE(CLASS, PARENT) \
107     void print##CLASS##Before(const CLASS##Type *T, raw_ostream &OS); \
108     void print##CLASS##After(const CLASS##Type *T, raw_ostream &OS);
109 #include "clang/AST/TypeNodes.def"
110   };
111 }
112 
113 static void AppendTypeQualList(raw_ostream &OS, unsigned TypeQuals, bool C99) {
114   bool appendSpace = false;
115   if (TypeQuals & Qualifiers::Const) {
116     OS << "const";
117     appendSpace = true;
118   }
119   if (TypeQuals & Qualifiers::Volatile) {
120     if (appendSpace) OS << ' ';
121     OS << "volatile";
122     appendSpace = true;
123   }
124   if (TypeQuals & Qualifiers::Restrict) {
125     if (appendSpace) OS << ' ';
126     if (C99) {
127       OS << "restrict";
128     } else {
129       OS << "__restrict";
130     }
131   }
132 }
133 
134 void TypePrinter::spaceBeforePlaceHolder(raw_ostream &OS) {
135   if (!HasEmptyPlaceHolder)
136     OS << ' ';
137 }
138 
139 void TypePrinter::print(QualType t, raw_ostream &OS, StringRef PlaceHolder) {
140   SplitQualType split = t.split();
141   print(split.Ty, split.Quals, OS, PlaceHolder);
142 }
143 
144 void TypePrinter::print(const Type *T, Qualifiers Quals, raw_ostream &OS,
145                         StringRef PlaceHolder) {
146   if (!T) {
147     OS << "NULL TYPE";
148     return;
149   }
150 
151   SaveAndRestore<bool> PHVal(HasEmptyPlaceHolder, PlaceHolder.empty());
152 
153   printBefore(T, Quals, OS);
154   OS << PlaceHolder;
155   printAfter(T, Quals, OS);
156 }
157 
158 bool TypePrinter::canPrefixQualifiers(const Type *T,
159                                       bool &NeedARCStrongQualifier) {
160   // CanPrefixQualifiers - We prefer to print type qualifiers before the type,
161   // so that we get "const int" instead of "int const", but we can't do this if
162   // the type is complex.  For example if the type is "int*", we *must* print
163   // "int * const", printing "const int *" is different.  Only do this when the
164   // type expands to a simple string.
165   bool CanPrefixQualifiers = false;
166   NeedARCStrongQualifier = false;
167   Type::TypeClass TC = T->getTypeClass();
168   if (const AutoType *AT = dyn_cast<AutoType>(T))
169     TC = AT->desugar()->getTypeClass();
170   if (const SubstTemplateTypeParmType *Subst
171                                       = dyn_cast<SubstTemplateTypeParmType>(T))
172     TC = Subst->getReplacementType()->getTypeClass();
173 
174   switch (TC) {
175     case Type::Auto:
176     case Type::Builtin:
177     case Type::Complex:
178     case Type::UnresolvedUsing:
179     case Type::Typedef:
180     case Type::TypeOfExpr:
181     case Type::TypeOf:
182     case Type::Decltype:
183     case Type::UnaryTransform:
184     case Type::Record:
185     case Type::Enum:
186     case Type::Elaborated:
187     case Type::TemplateTypeParm:
188     case Type::SubstTemplateTypeParmPack:
189     case Type::TemplateSpecialization:
190     case Type::InjectedClassName:
191     case Type::DependentName:
192     case Type::DependentTemplateSpecialization:
193     case Type::ObjCObject:
194     case Type::ObjCInterface:
195     case Type::Atomic:
196       CanPrefixQualifiers = true;
197       break;
198 
199     case Type::ObjCObjectPointer:
200       CanPrefixQualifiers = T->isObjCIdType() || T->isObjCClassType() ||
201         T->isObjCQualifiedIdType() || T->isObjCQualifiedClassType();
202       break;
203 
204     case Type::ConstantArray:
205     case Type::IncompleteArray:
206     case Type::VariableArray:
207     case Type::DependentSizedArray:
208       NeedARCStrongQualifier = true;
209       // Fall through
210 
211     case Type::Adjusted:
212     case Type::Decayed:
213     case Type::Pointer:
214     case Type::BlockPointer:
215     case Type::LValueReference:
216     case Type::RValueReference:
217     case Type::MemberPointer:
218     case Type::DependentSizedExtVector:
219     case Type::Vector:
220     case Type::ExtVector:
221     case Type::FunctionProto:
222     case Type::FunctionNoProto:
223     case Type::Paren:
224     case Type::Attributed:
225     case Type::PackExpansion:
226     case Type::SubstTemplateTypeParm:
227       CanPrefixQualifiers = false;
228       break;
229   }
230 
231   return CanPrefixQualifiers;
232 }
233 
234 void TypePrinter::printBefore(QualType T, raw_ostream &OS) {
235   SplitQualType Split = T.split();
236 
237   // If we have cv1 T, where T is substituted for cv2 U, only print cv1 - cv2
238   // at this level.
239   Qualifiers Quals = Split.Quals;
240   if (const SubstTemplateTypeParmType *Subst =
241         dyn_cast<SubstTemplateTypeParmType>(Split.Ty))
242     Quals -= QualType(Subst, 0).getQualifiers();
243 
244   printBefore(Split.Ty, Quals, OS);
245 }
246 
247 /// \brief Prints the part of the type string before an identifier, e.g. for
248 /// "int foo[10]" it prints "int ".
249 void TypePrinter::printBefore(const Type *T,Qualifiers Quals, raw_ostream &OS) {
250   if (Policy.SuppressSpecifiers && T->isSpecifierType())
251     return;
252 
253   SaveAndRestore<bool> PrevPHIsEmpty(HasEmptyPlaceHolder);
254 
255   // Print qualifiers as appropriate.
256 
257   bool CanPrefixQualifiers = false;
258   bool NeedARCStrongQualifier = false;
259   CanPrefixQualifiers = canPrefixQualifiers(T, NeedARCStrongQualifier);
260 
261   if (CanPrefixQualifiers && !Quals.empty()) {
262     if (NeedARCStrongQualifier) {
263       IncludeStrongLifetimeRAII Strong(Policy);
264       Quals.print(OS, Policy, /*appendSpaceIfNonEmpty=*/true);
265     } else {
266       Quals.print(OS, Policy, /*appendSpaceIfNonEmpty=*/true);
267     }
268   }
269 
270   bool hasAfterQuals = false;
271   if (!CanPrefixQualifiers && !Quals.empty()) {
272     hasAfterQuals = !Quals.isEmptyWhenPrinted(Policy);
273     if (hasAfterQuals)
274       HasEmptyPlaceHolder = false;
275   }
276 
277   switch (T->getTypeClass()) {
278 #define ABSTRACT_TYPE(CLASS, PARENT)
279 #define TYPE(CLASS, PARENT) case Type::CLASS: \
280     print##CLASS##Before(cast<CLASS##Type>(T), OS); \
281     break;
282 #include "clang/AST/TypeNodes.def"
283   }
284 
285   if (hasAfterQuals) {
286     if (NeedARCStrongQualifier) {
287       IncludeStrongLifetimeRAII Strong(Policy);
288       Quals.print(OS, Policy, /*appendSpaceIfNonEmpty=*/!PrevPHIsEmpty.get());
289     } else {
290       Quals.print(OS, Policy, /*appendSpaceIfNonEmpty=*/!PrevPHIsEmpty.get());
291     }
292   }
293 }
294 
295 void TypePrinter::printAfter(QualType t, raw_ostream &OS) {
296   SplitQualType split = t.split();
297   printAfter(split.Ty, split.Quals, OS);
298 }
299 
300 /// \brief Prints the part of the type string after an identifier, e.g. for
301 /// "int foo[10]" it prints "[10]".
302 void TypePrinter::printAfter(const Type *T, Qualifiers Quals, raw_ostream &OS) {
303   switch (T->getTypeClass()) {
304 #define ABSTRACT_TYPE(CLASS, PARENT)
305 #define TYPE(CLASS, PARENT) case Type::CLASS: \
306     print##CLASS##After(cast<CLASS##Type>(T), OS); \
307     break;
308 #include "clang/AST/TypeNodes.def"
309   }
310 }
311 
312 void TypePrinter::printBuiltinBefore(const BuiltinType *T, raw_ostream &OS) {
313   OS << T->getName(Policy);
314   spaceBeforePlaceHolder(OS);
315 }
316 void TypePrinter::printBuiltinAfter(const BuiltinType *T, raw_ostream &OS) { }
317 
318 void TypePrinter::printComplexBefore(const ComplexType *T, raw_ostream &OS) {
319   OS << "_Complex ";
320   printBefore(T->getElementType(), OS);
321 }
322 void TypePrinter::printComplexAfter(const ComplexType *T, raw_ostream &OS) {
323   printAfter(T->getElementType(), OS);
324 }
325 
326 void TypePrinter::printPointerBefore(const PointerType *T, raw_ostream &OS) {
327   IncludeStrongLifetimeRAII Strong(Policy);
328   SaveAndRestore<bool> NonEmptyPH(HasEmptyPlaceHolder, false);
329   printBefore(T->getPointeeType(), OS);
330   // Handle things like 'int (*A)[4];' correctly.
331   // FIXME: this should include vectors, but vectors use attributes I guess.
332   if (isa<ArrayType>(T->getPointeeType()))
333     OS << '(';
334   OS << '*';
335 }
336 void TypePrinter::printPointerAfter(const PointerType *T, raw_ostream &OS) {
337   IncludeStrongLifetimeRAII Strong(Policy);
338   SaveAndRestore<bool> NonEmptyPH(HasEmptyPlaceHolder, false);
339   // Handle things like 'int (*A)[4];' correctly.
340   // FIXME: this should include vectors, but vectors use attributes I guess.
341   if (isa<ArrayType>(T->getPointeeType()))
342     OS << ')';
343   printAfter(T->getPointeeType(), OS);
344 }
345 
346 void TypePrinter::printBlockPointerBefore(const BlockPointerType *T,
347                                           raw_ostream &OS) {
348   SaveAndRestore<bool> NonEmptyPH(HasEmptyPlaceHolder, false);
349   printBefore(T->getPointeeType(), OS);
350   OS << '^';
351 }
352 void TypePrinter::printBlockPointerAfter(const BlockPointerType *T,
353                                           raw_ostream &OS) {
354   SaveAndRestore<bool> NonEmptyPH(HasEmptyPlaceHolder, false);
355   printAfter(T->getPointeeType(), OS);
356 }
357 
358 void TypePrinter::printLValueReferenceBefore(const LValueReferenceType *T,
359                                              raw_ostream &OS) {
360   IncludeStrongLifetimeRAII Strong(Policy);
361   SaveAndRestore<bool> NonEmptyPH(HasEmptyPlaceHolder, false);
362   printBefore(T->getPointeeTypeAsWritten(), OS);
363   // Handle things like 'int (&A)[4];' correctly.
364   // FIXME: this should include vectors, but vectors use attributes I guess.
365   if (isa<ArrayType>(T->getPointeeTypeAsWritten()))
366     OS << '(';
367   OS << '&';
368 }
369 void TypePrinter::printLValueReferenceAfter(const LValueReferenceType *T,
370                                             raw_ostream &OS) {
371   IncludeStrongLifetimeRAII Strong(Policy);
372   SaveAndRestore<bool> NonEmptyPH(HasEmptyPlaceHolder, false);
373   // Handle things like 'int (&A)[4];' correctly.
374   // FIXME: this should include vectors, but vectors use attributes I guess.
375   if (isa<ArrayType>(T->getPointeeTypeAsWritten()))
376     OS << ')';
377   printAfter(T->getPointeeTypeAsWritten(), OS);
378 }
379 
380 void TypePrinter::printRValueReferenceBefore(const RValueReferenceType *T,
381                                              raw_ostream &OS) {
382   IncludeStrongLifetimeRAII Strong(Policy);
383   SaveAndRestore<bool> NonEmptyPH(HasEmptyPlaceHolder, false);
384   printBefore(T->getPointeeTypeAsWritten(), OS);
385   // Handle things like 'int (&&A)[4];' correctly.
386   // FIXME: this should include vectors, but vectors use attributes I guess.
387   if (isa<ArrayType>(T->getPointeeTypeAsWritten()))
388     OS << '(';
389   OS << "&&";
390 }
391 void TypePrinter::printRValueReferenceAfter(const RValueReferenceType *T,
392                                             raw_ostream &OS) {
393   IncludeStrongLifetimeRAII Strong(Policy);
394   SaveAndRestore<bool> NonEmptyPH(HasEmptyPlaceHolder, false);
395   // Handle things like 'int (&&A)[4];' correctly.
396   // FIXME: this should include vectors, but vectors use attributes I guess.
397   if (isa<ArrayType>(T->getPointeeTypeAsWritten()))
398     OS << ')';
399   printAfter(T->getPointeeTypeAsWritten(), OS);
400 }
401 
402 void TypePrinter::printMemberPointerBefore(const MemberPointerType *T,
403                                            raw_ostream &OS) {
404   IncludeStrongLifetimeRAII Strong(Policy);
405   SaveAndRestore<bool> NonEmptyPH(HasEmptyPlaceHolder, false);
406   printBefore(T->getPointeeType(), OS);
407   // Handle things like 'int (Cls::*A)[4];' correctly.
408   // FIXME: this should include vectors, but vectors use attributes I guess.
409   if (isa<ArrayType>(T->getPointeeType()))
410     OS << '(';
411 
412   PrintingPolicy InnerPolicy(Policy);
413   InnerPolicy.SuppressTag = false;
414   TypePrinter(InnerPolicy).print(QualType(T->getClass(), 0), OS, StringRef());
415 
416   OS << "::*";
417 }
418 void TypePrinter::printMemberPointerAfter(const MemberPointerType *T,
419                                           raw_ostream &OS) {
420   IncludeStrongLifetimeRAII Strong(Policy);
421   SaveAndRestore<bool> NonEmptyPH(HasEmptyPlaceHolder, false);
422   // Handle things like 'int (Cls::*A)[4];' correctly.
423   // FIXME: this should include vectors, but vectors use attributes I guess.
424   if (isa<ArrayType>(T->getPointeeType()))
425     OS << ')';
426   printAfter(T->getPointeeType(), OS);
427 }
428 
429 void TypePrinter::printConstantArrayBefore(const ConstantArrayType *T,
430                                            raw_ostream &OS) {
431   IncludeStrongLifetimeRAII Strong(Policy);
432   SaveAndRestore<bool> NonEmptyPH(HasEmptyPlaceHolder, false);
433   printBefore(T->getElementType(), OS);
434 }
435 void TypePrinter::printConstantArrayAfter(const ConstantArrayType *T,
436                                           raw_ostream &OS) {
437   OS << '[';
438   if (T->getIndexTypeQualifiers().hasQualifiers()) {
439     AppendTypeQualList(OS, T->getIndexTypeCVRQualifiers(), Policy.LangOpts.C99);
440     OS << ' ';
441   }
442 
443   if (T->getSizeModifier() == ArrayType::Static)
444     OS << "static ";
445 
446   OS << T->getSize().getZExtValue() << ']';
447   printAfter(T->getElementType(), OS);
448 }
449 
450 void TypePrinter::printIncompleteArrayBefore(const IncompleteArrayType *T,
451                                              raw_ostream &OS) {
452   IncludeStrongLifetimeRAII Strong(Policy);
453   SaveAndRestore<bool> NonEmptyPH(HasEmptyPlaceHolder, false);
454   printBefore(T->getElementType(), OS);
455 }
456 void TypePrinter::printIncompleteArrayAfter(const IncompleteArrayType *T,
457                                             raw_ostream &OS) {
458   OS << "[]";
459   printAfter(T->getElementType(), OS);
460 }
461 
462 void TypePrinter::printVariableArrayBefore(const VariableArrayType *T,
463                                            raw_ostream &OS) {
464   IncludeStrongLifetimeRAII Strong(Policy);
465   SaveAndRestore<bool> NonEmptyPH(HasEmptyPlaceHolder, false);
466   printBefore(T->getElementType(), OS);
467 }
468 void TypePrinter::printVariableArrayAfter(const VariableArrayType *T,
469                                           raw_ostream &OS) {
470   OS << '[';
471   if (T->getIndexTypeQualifiers().hasQualifiers()) {
472     AppendTypeQualList(OS, T->getIndexTypeCVRQualifiers(), Policy.LangOpts.C99);
473     OS << ' ';
474   }
475 
476   if (T->getSizeModifier() == VariableArrayType::Static)
477     OS << "static ";
478   else if (T->getSizeModifier() == VariableArrayType::Star)
479     OS << '*';
480 
481   if (T->getSizeExpr())
482     T->getSizeExpr()->printPretty(OS, nullptr, Policy);
483   OS << ']';
484 
485   printAfter(T->getElementType(), OS);
486 }
487 
488 void TypePrinter::printAdjustedBefore(const AdjustedType *T, raw_ostream &OS) {
489   // Print the adjusted representation, otherwise the adjustment will be
490   // invisible.
491   printBefore(T->getAdjustedType(), OS);
492 }
493 void TypePrinter::printAdjustedAfter(const AdjustedType *T, raw_ostream &OS) {
494   printAfter(T->getAdjustedType(), OS);
495 }
496 
497 void TypePrinter::printDecayedBefore(const DecayedType *T, raw_ostream &OS) {
498   // Print as though it's a pointer.
499   printAdjustedBefore(T, OS);
500 }
501 void TypePrinter::printDecayedAfter(const DecayedType *T, raw_ostream &OS) {
502   printAdjustedAfter(T, OS);
503 }
504 
505 void TypePrinter::printDependentSizedArrayBefore(
506                                                const DependentSizedArrayType *T,
507                                                raw_ostream &OS) {
508   IncludeStrongLifetimeRAII Strong(Policy);
509   SaveAndRestore<bool> NonEmptyPH(HasEmptyPlaceHolder, false);
510   printBefore(T->getElementType(), OS);
511 }
512 void TypePrinter::printDependentSizedArrayAfter(
513                                                const DependentSizedArrayType *T,
514                                                raw_ostream &OS) {
515   OS << '[';
516   if (T->getSizeExpr())
517     T->getSizeExpr()->printPretty(OS, nullptr, Policy);
518   OS << ']';
519   printAfter(T->getElementType(), OS);
520 }
521 
522 void TypePrinter::printDependentSizedExtVectorBefore(
523                                           const DependentSizedExtVectorType *T,
524                                           raw_ostream &OS) {
525   printBefore(T->getElementType(), OS);
526 }
527 void TypePrinter::printDependentSizedExtVectorAfter(
528                                           const DependentSizedExtVectorType *T,
529                                           raw_ostream &OS) {
530   OS << " __attribute__((ext_vector_type(";
531   if (T->getSizeExpr())
532     T->getSizeExpr()->printPretty(OS, nullptr, Policy);
533   OS << ")))";
534   printAfter(T->getElementType(), OS);
535 }
536 
537 void TypePrinter::printVectorBefore(const VectorType *T, raw_ostream &OS) {
538   switch (T->getVectorKind()) {
539   case VectorType::AltiVecPixel:
540     OS << "__vector __pixel ";
541     break;
542   case VectorType::AltiVecBool:
543     OS << "__vector __bool ";
544     printBefore(T->getElementType(), OS);
545     break;
546   case VectorType::AltiVecVector:
547     OS << "__vector ";
548     printBefore(T->getElementType(), OS);
549     break;
550   case VectorType::NeonVector:
551     OS << "__attribute__((neon_vector_type("
552        << T->getNumElements() << "))) ";
553     printBefore(T->getElementType(), OS);
554     break;
555   case VectorType::NeonPolyVector:
556     OS << "__attribute__((neon_polyvector_type(" <<
557           T->getNumElements() << "))) ";
558     printBefore(T->getElementType(), OS);
559     break;
560   case VectorType::GenericVector: {
561     // FIXME: We prefer to print the size directly here, but have no way
562     // to get the size of the type.
563     OS << "__attribute__((__vector_size__("
564        << T->getNumElements()
565        << " * sizeof(";
566     print(T->getElementType(), OS, StringRef());
567     OS << ")))) ";
568     printBefore(T->getElementType(), OS);
569     break;
570   }
571   }
572 }
573 void TypePrinter::printVectorAfter(const VectorType *T, raw_ostream &OS) {
574   printAfter(T->getElementType(), OS);
575 }
576 
577 void TypePrinter::printExtVectorBefore(const ExtVectorType *T,
578                                        raw_ostream &OS) {
579   printBefore(T->getElementType(), OS);
580 }
581 void TypePrinter::printExtVectorAfter(const ExtVectorType *T, raw_ostream &OS) {
582   printAfter(T->getElementType(), OS);
583   OS << " __attribute__((ext_vector_type(";
584   OS << T->getNumElements();
585   OS << ")))";
586 }
587 
588 void
589 FunctionProtoType::printExceptionSpecification(raw_ostream &OS,
590                                                const PrintingPolicy &Policy)
591                                                                          const {
592 
593   if (hasDynamicExceptionSpec()) {
594     OS << " throw(";
595     if (getExceptionSpecType() == EST_MSAny)
596       OS << "...";
597     else
598       for (unsigned I = 0, N = getNumExceptions(); I != N; ++I) {
599         if (I)
600           OS << ", ";
601 
602         OS << getExceptionType(I).stream(Policy);
603       }
604     OS << ')';
605   } else if (isNoexceptExceptionSpec(getExceptionSpecType())) {
606     OS << " noexcept";
607     if (getExceptionSpecType() == EST_ComputedNoexcept) {
608       OS << '(';
609       if (getNoexceptExpr())
610         getNoexceptExpr()->printPretty(OS, nullptr, Policy);
611       OS << ')';
612     }
613   }
614 }
615 
616 void TypePrinter::printFunctionProtoBefore(const FunctionProtoType *T,
617                                            raw_ostream &OS) {
618   if (T->hasTrailingReturn()) {
619     OS << "auto ";
620     if (!HasEmptyPlaceHolder)
621       OS << '(';
622   } else {
623     // If needed for precedence reasons, wrap the inner part in grouping parens.
624     SaveAndRestore<bool> PrevPHIsEmpty(HasEmptyPlaceHolder, false);
625     printBefore(T->getReturnType(), OS);
626     if (!PrevPHIsEmpty.get())
627       OS << '(';
628   }
629 }
630 
631 void TypePrinter::printFunctionProtoAfter(const FunctionProtoType *T,
632                                           raw_ostream &OS) {
633   // If needed for precedence reasons, wrap the inner part in grouping parens.
634   if (!HasEmptyPlaceHolder)
635     OS << ')';
636   SaveAndRestore<bool> NonEmptyPH(HasEmptyPlaceHolder, false);
637 
638   OS << '(';
639   {
640     ParamPolicyRAII ParamPolicy(Policy);
641     for (unsigned i = 0, e = T->getNumParams(); i != e; ++i) {
642       if (i) OS << ", ";
643       print(T->getParamType(i), OS, StringRef());
644     }
645   }
646 
647   if (T->isVariadic()) {
648     if (T->getNumParams())
649       OS << ", ";
650     OS << "...";
651   } else if (T->getNumParams() == 0 && !Policy.LangOpts.CPlusPlus) {
652     // Do not emit int() if we have a proto, emit 'int(void)'.
653     OS << "void";
654   }
655 
656   OS << ')';
657 
658   FunctionType::ExtInfo Info = T->getExtInfo();
659 
660   if (!InsideCCAttribute) {
661     switch (Info.getCC()) {
662     case CC_C:
663       // The C calling convention is the default on the vast majority of platforms
664       // we support.  If the user wrote it explicitly, it will usually be printed
665       // while traversing the AttributedType.  If the type has been desugared, let
666       // the canonical spelling be the implicit calling convention.
667       // FIXME: It would be better to be explicit in certain contexts, such as a
668       // cdecl function typedef used to declare a member function with the
669       // Microsoft C++ ABI.
670       break;
671     case CC_X86StdCall:
672       OS << " __attribute__((stdcall))";
673       break;
674     case CC_X86FastCall:
675       OS << " __attribute__((fastcall))";
676       break;
677     case CC_X86ThisCall:
678       OS << " __attribute__((thiscall))";
679       break;
680     case CC_X86VectorCall:
681       OS << " __attribute__((vectorcall))";
682       break;
683     case CC_X86Pascal:
684       OS << " __attribute__((pascal))";
685       break;
686     case CC_AAPCS:
687       OS << " __attribute__((pcs(\"aapcs\")))";
688       break;
689     case CC_AAPCS_VFP:
690       OS << " __attribute__((pcs(\"aapcs-vfp\")))";
691       break;
692     case CC_IntelOclBicc:
693       OS << " __attribute__((intel_ocl_bicc))";
694       break;
695     case CC_X86_64Win64:
696       OS << " __attribute__((ms_abi))";
697       break;
698     case CC_X86_64SysV:
699       OS << " __attribute__((sysv_abi))";
700       break;
701     case CC_SpirFunction:
702     case CC_SpirKernel:
703       // Do nothing. These CCs are not available as attributes.
704       break;
705     }
706   }
707 
708   if (Info.getNoReturn())
709     OS << " __attribute__((noreturn))";
710   if (Info.getRegParm())
711     OS << " __attribute__((regparm ("
712        << Info.getRegParm() << ")))";
713 
714   if (unsigned quals = T->getTypeQuals()) {
715     OS << ' ';
716     AppendTypeQualList(OS, quals, Policy.LangOpts.C99);
717   }
718 
719   switch (T->getRefQualifier()) {
720   case RQ_None:
721     break;
722 
723   case RQ_LValue:
724     OS << " &";
725     break;
726 
727   case RQ_RValue:
728     OS << " &&";
729     break;
730   }
731   T->printExceptionSpecification(OS, Policy);
732 
733   if (T->hasTrailingReturn()) {
734     OS << " -> ";
735     print(T->getReturnType(), OS, StringRef());
736   } else
737     printAfter(T->getReturnType(), OS);
738 }
739 
740 void TypePrinter::printFunctionNoProtoBefore(const FunctionNoProtoType *T,
741                                              raw_ostream &OS) {
742   // If needed for precedence reasons, wrap the inner part in grouping parens.
743   SaveAndRestore<bool> PrevPHIsEmpty(HasEmptyPlaceHolder, false);
744   printBefore(T->getReturnType(), OS);
745   if (!PrevPHIsEmpty.get())
746     OS << '(';
747 }
748 void TypePrinter::printFunctionNoProtoAfter(const FunctionNoProtoType *T,
749                                             raw_ostream &OS) {
750   // If needed for precedence reasons, wrap the inner part in grouping parens.
751   if (!HasEmptyPlaceHolder)
752     OS << ')';
753   SaveAndRestore<bool> NonEmptyPH(HasEmptyPlaceHolder, false);
754 
755   OS << "()";
756   if (T->getNoReturnAttr())
757     OS << " __attribute__((noreturn))";
758   printAfter(T->getReturnType(), OS);
759 }
760 
761 void TypePrinter::printTypeSpec(const NamedDecl *D, raw_ostream &OS) {
762   IdentifierInfo *II = D->getIdentifier();
763   OS << II->getName();
764   spaceBeforePlaceHolder(OS);
765 }
766 
767 void TypePrinter::printUnresolvedUsingBefore(const UnresolvedUsingType *T,
768                                              raw_ostream &OS) {
769   printTypeSpec(T->getDecl(), OS);
770 }
771 void TypePrinter::printUnresolvedUsingAfter(const UnresolvedUsingType *T,
772                                              raw_ostream &OS) { }
773 
774 void TypePrinter::printTypedefBefore(const TypedefType *T, raw_ostream &OS) {
775   printTypeSpec(T->getDecl(), OS);
776 }
777 void TypePrinter::printTypedefAfter(const TypedefType *T, raw_ostream &OS) { }
778 
779 void TypePrinter::printTypeOfExprBefore(const TypeOfExprType *T,
780                                         raw_ostream &OS) {
781   OS << "typeof ";
782   if (T->getUnderlyingExpr())
783     T->getUnderlyingExpr()->printPretty(OS, nullptr, Policy);
784   spaceBeforePlaceHolder(OS);
785 }
786 void TypePrinter::printTypeOfExprAfter(const TypeOfExprType *T,
787                                        raw_ostream &OS) { }
788 
789 void TypePrinter::printTypeOfBefore(const TypeOfType *T, raw_ostream &OS) {
790   OS << "typeof(";
791   print(T->getUnderlyingType(), OS, StringRef());
792   OS << ')';
793   spaceBeforePlaceHolder(OS);
794 }
795 void TypePrinter::printTypeOfAfter(const TypeOfType *T, raw_ostream &OS) { }
796 
797 void TypePrinter::printDecltypeBefore(const DecltypeType *T, raw_ostream &OS) {
798   OS << "decltype(";
799   if (T->getUnderlyingExpr())
800     T->getUnderlyingExpr()->printPretty(OS, nullptr, Policy);
801   OS << ')';
802   spaceBeforePlaceHolder(OS);
803 }
804 void TypePrinter::printDecltypeAfter(const DecltypeType *T, raw_ostream &OS) { }
805 
806 void TypePrinter::printUnaryTransformBefore(const UnaryTransformType *T,
807                                             raw_ostream &OS) {
808   IncludeStrongLifetimeRAII Strong(Policy);
809 
810   switch (T->getUTTKind()) {
811     case UnaryTransformType::EnumUnderlyingType:
812       OS << "__underlying_type(";
813       print(T->getBaseType(), OS, StringRef());
814       OS << ')';
815       spaceBeforePlaceHolder(OS);
816       return;
817   }
818 
819   printBefore(T->getBaseType(), OS);
820 }
821 void TypePrinter::printUnaryTransformAfter(const UnaryTransformType *T,
822                                            raw_ostream &OS) {
823   IncludeStrongLifetimeRAII Strong(Policy);
824 
825   switch (T->getUTTKind()) {
826     case UnaryTransformType::EnumUnderlyingType:
827       return;
828   }
829 
830   printAfter(T->getBaseType(), OS);
831 }
832 
833 void TypePrinter::printAutoBefore(const AutoType *T, raw_ostream &OS) {
834   // If the type has been deduced, do not print 'auto'.
835   if (!T->getDeducedType().isNull()) {
836     printBefore(T->getDeducedType(), OS);
837   } else {
838     OS << (T->isDecltypeAuto() ? "decltype(auto)" : "auto");
839     spaceBeforePlaceHolder(OS);
840   }
841 }
842 void TypePrinter::printAutoAfter(const AutoType *T, raw_ostream &OS) {
843   // If the type has been deduced, do not print 'auto'.
844   if (!T->getDeducedType().isNull())
845     printAfter(T->getDeducedType(), OS);
846 }
847 
848 void TypePrinter::printAtomicBefore(const AtomicType *T, raw_ostream &OS) {
849   IncludeStrongLifetimeRAII Strong(Policy);
850 
851   OS << "_Atomic(";
852   print(T->getValueType(), OS, StringRef());
853   OS << ')';
854   spaceBeforePlaceHolder(OS);
855 }
856 void TypePrinter::printAtomicAfter(const AtomicType *T, raw_ostream &OS) { }
857 
858 /// Appends the given scope to the end of a string.
859 void TypePrinter::AppendScope(DeclContext *DC, raw_ostream &OS) {
860   if (DC->isTranslationUnit()) return;
861   if (DC->isFunctionOrMethod()) return;
862   AppendScope(DC->getParent(), OS);
863 
864   if (NamespaceDecl *NS = dyn_cast<NamespaceDecl>(DC)) {
865     if (Policy.SuppressUnwrittenScope &&
866         (NS->isAnonymousNamespace() || NS->isInline()))
867       return;
868     if (NS->getIdentifier())
869       OS << NS->getName() << "::";
870     else
871       OS << "(anonymous namespace)::";
872   } else if (ClassTemplateSpecializationDecl *Spec
873                = dyn_cast<ClassTemplateSpecializationDecl>(DC)) {
874     IncludeStrongLifetimeRAII Strong(Policy);
875     OS << Spec->getIdentifier()->getName();
876     const TemplateArgumentList &TemplateArgs = Spec->getTemplateArgs();
877     TemplateSpecializationType::PrintTemplateArgumentList(OS,
878                                             TemplateArgs.data(),
879                                             TemplateArgs.size(),
880                                             Policy);
881     OS << "::";
882   } else if (TagDecl *Tag = dyn_cast<TagDecl>(DC)) {
883     if (TypedefNameDecl *Typedef = Tag->getTypedefNameForAnonDecl())
884       OS << Typedef->getIdentifier()->getName() << "::";
885     else if (Tag->getIdentifier())
886       OS << Tag->getIdentifier()->getName() << "::";
887     else
888       return;
889   }
890 }
891 
892 void TypePrinter::printTag(TagDecl *D, raw_ostream &OS) {
893   if (Policy.SuppressTag)
894     return;
895 
896   bool HasKindDecoration = false;
897 
898   // bool SuppressTagKeyword
899   //   = Policy.LangOpts.CPlusPlus || Policy.SuppressTagKeyword;
900 
901   // We don't print tags unless this is an elaborated type.
902   // In C, we just assume every RecordType is an elaborated type.
903   if (!(Policy.LangOpts.CPlusPlus || Policy.SuppressTagKeyword ||
904         D->getTypedefNameForAnonDecl())) {
905     HasKindDecoration = true;
906     OS << D->getKindName();
907     OS << ' ';
908   }
909 
910   // Compute the full nested-name-specifier for this type.
911   // In C, this will always be empty except when the type
912   // being printed is anonymous within other Record.
913   if (!Policy.SuppressScope)
914     AppendScope(D->getDeclContext(), OS);
915 
916   if (const IdentifierInfo *II = D->getIdentifier())
917     OS << II->getName();
918   else if (TypedefNameDecl *Typedef = D->getTypedefNameForAnonDecl()) {
919     assert(Typedef->getIdentifier() && "Typedef without identifier?");
920     OS << Typedef->getIdentifier()->getName();
921   } else {
922     // Make an unambiguous representation for anonymous types, e.g.
923     //   (anonymous enum at /usr/include/string.h:120:9)
924 
925     if (isa<CXXRecordDecl>(D) && cast<CXXRecordDecl>(D)->isLambda()) {
926       OS << "(lambda";
927       HasKindDecoration = true;
928     } else {
929       OS << "(anonymous";
930     }
931 
932     if (Policy.AnonymousTagLocations) {
933       // Suppress the redundant tag keyword if we just printed one.
934       // We don't have to worry about ElaboratedTypes here because you can't
935       // refer to an anonymous type with one.
936       if (!HasKindDecoration)
937         OS << " " << D->getKindName();
938 
939       PresumedLoc PLoc = D->getASTContext().getSourceManager().getPresumedLoc(
940           D->getLocation());
941       if (PLoc.isValid()) {
942         OS << " at " << PLoc.getFilename()
943            << ':' << PLoc.getLine()
944            << ':' << PLoc.getColumn();
945       }
946     }
947 
948     OS << ')';
949   }
950 
951   // If this is a class template specialization, print the template
952   // arguments.
953   if (ClassTemplateSpecializationDecl *Spec
954         = dyn_cast<ClassTemplateSpecializationDecl>(D)) {
955     const TemplateArgument *Args;
956     unsigned NumArgs;
957     if (TypeSourceInfo *TAW = Spec->getTypeAsWritten()) {
958       const TemplateSpecializationType *TST =
959         cast<TemplateSpecializationType>(TAW->getType());
960       Args = TST->getArgs();
961       NumArgs = TST->getNumArgs();
962     } else {
963       const TemplateArgumentList &TemplateArgs = Spec->getTemplateArgs();
964       Args = TemplateArgs.data();
965       NumArgs = TemplateArgs.size();
966     }
967     IncludeStrongLifetimeRAII Strong(Policy);
968     TemplateSpecializationType::PrintTemplateArgumentList(OS,
969                                                           Args, NumArgs,
970                                                           Policy);
971   }
972 
973   spaceBeforePlaceHolder(OS);
974 }
975 
976 void TypePrinter::printRecordBefore(const RecordType *T, raw_ostream &OS) {
977   printTag(T->getDecl(), OS);
978 }
979 void TypePrinter::printRecordAfter(const RecordType *T, raw_ostream &OS) { }
980 
981 void TypePrinter::printEnumBefore(const EnumType *T, raw_ostream &OS) {
982   printTag(T->getDecl(), OS);
983 }
984 void TypePrinter::printEnumAfter(const EnumType *T, raw_ostream &OS) { }
985 
986 void TypePrinter::printTemplateTypeParmBefore(const TemplateTypeParmType *T,
987                                               raw_ostream &OS) {
988   if (IdentifierInfo *Id = T->getIdentifier())
989     OS << Id->getName();
990   else
991     OS << "type-parameter-" << T->getDepth() << '-' << T->getIndex();
992   spaceBeforePlaceHolder(OS);
993 }
994 void TypePrinter::printTemplateTypeParmAfter(const TemplateTypeParmType *T,
995                                              raw_ostream &OS) { }
996 
997 void TypePrinter::printSubstTemplateTypeParmBefore(
998                                              const SubstTemplateTypeParmType *T,
999                                              raw_ostream &OS) {
1000   IncludeStrongLifetimeRAII Strong(Policy);
1001   printBefore(T->getReplacementType(), OS);
1002 }
1003 void TypePrinter::printSubstTemplateTypeParmAfter(
1004                                              const SubstTemplateTypeParmType *T,
1005                                              raw_ostream &OS) {
1006   IncludeStrongLifetimeRAII Strong(Policy);
1007   printAfter(T->getReplacementType(), OS);
1008 }
1009 
1010 void TypePrinter::printSubstTemplateTypeParmPackBefore(
1011                                         const SubstTemplateTypeParmPackType *T,
1012                                         raw_ostream &OS) {
1013   IncludeStrongLifetimeRAII Strong(Policy);
1014   printTemplateTypeParmBefore(T->getReplacedParameter(), OS);
1015 }
1016 void TypePrinter::printSubstTemplateTypeParmPackAfter(
1017                                         const SubstTemplateTypeParmPackType *T,
1018                                         raw_ostream &OS) {
1019   IncludeStrongLifetimeRAII Strong(Policy);
1020   printTemplateTypeParmAfter(T->getReplacedParameter(), OS);
1021 }
1022 
1023 void TypePrinter::printTemplateSpecializationBefore(
1024                                             const TemplateSpecializationType *T,
1025                                             raw_ostream &OS) {
1026   IncludeStrongLifetimeRAII Strong(Policy);
1027   T->getTemplateName().print(OS, Policy);
1028 
1029   TemplateSpecializationType::PrintTemplateArgumentList(OS,
1030                                                         T->getArgs(),
1031                                                         T->getNumArgs(),
1032                                                         Policy);
1033   spaceBeforePlaceHolder(OS);
1034 }
1035 void TypePrinter::printTemplateSpecializationAfter(
1036                                             const TemplateSpecializationType *T,
1037                                             raw_ostream &OS) { }
1038 
1039 void TypePrinter::printInjectedClassNameBefore(const InjectedClassNameType *T,
1040                                                raw_ostream &OS) {
1041   printTemplateSpecializationBefore(T->getInjectedTST(), OS);
1042 }
1043 void TypePrinter::printInjectedClassNameAfter(const InjectedClassNameType *T,
1044                                                raw_ostream &OS) { }
1045 
1046 void TypePrinter::printElaboratedBefore(const ElaboratedType *T,
1047                                         raw_ostream &OS) {
1048   if (Policy.SuppressTag && isa<TagType>(T->getNamedType()))
1049     return;
1050   OS << TypeWithKeyword::getKeywordName(T->getKeyword());
1051   if (T->getKeyword() != ETK_None)
1052     OS << " ";
1053   NestedNameSpecifier* Qualifier = T->getQualifier();
1054   if (Qualifier)
1055     Qualifier->print(OS, Policy);
1056 
1057   ElaboratedTypePolicyRAII PolicyRAII(Policy);
1058   printBefore(T->getNamedType(), OS);
1059 }
1060 void TypePrinter::printElaboratedAfter(const ElaboratedType *T,
1061                                         raw_ostream &OS) {
1062   ElaboratedTypePolicyRAII PolicyRAII(Policy);
1063   printAfter(T->getNamedType(), OS);
1064 }
1065 
1066 void TypePrinter::printParenBefore(const ParenType *T, raw_ostream &OS) {
1067   if (!HasEmptyPlaceHolder && !isa<FunctionType>(T->getInnerType())) {
1068     printBefore(T->getInnerType(), OS);
1069     OS << '(';
1070   } else
1071     printBefore(T->getInnerType(), OS);
1072 }
1073 void TypePrinter::printParenAfter(const ParenType *T, raw_ostream &OS) {
1074   if (!HasEmptyPlaceHolder && !isa<FunctionType>(T->getInnerType())) {
1075     OS << ')';
1076     printAfter(T->getInnerType(), OS);
1077   } else
1078     printAfter(T->getInnerType(), OS);
1079 }
1080 
1081 void TypePrinter::printDependentNameBefore(const DependentNameType *T,
1082                                            raw_ostream &OS) {
1083   OS << TypeWithKeyword::getKeywordName(T->getKeyword());
1084   if (T->getKeyword() != ETK_None)
1085     OS << " ";
1086 
1087   T->getQualifier()->print(OS, Policy);
1088 
1089   OS << T->getIdentifier()->getName();
1090   spaceBeforePlaceHolder(OS);
1091 }
1092 void TypePrinter::printDependentNameAfter(const DependentNameType *T,
1093                                           raw_ostream &OS) { }
1094 
1095 void TypePrinter::printDependentTemplateSpecializationBefore(
1096         const DependentTemplateSpecializationType *T, raw_ostream &OS) {
1097   IncludeStrongLifetimeRAII Strong(Policy);
1098 
1099   OS << TypeWithKeyword::getKeywordName(T->getKeyword());
1100   if (T->getKeyword() != ETK_None)
1101     OS << " ";
1102 
1103   if (T->getQualifier())
1104     T->getQualifier()->print(OS, Policy);
1105   OS << T->getIdentifier()->getName();
1106   TemplateSpecializationType::PrintTemplateArgumentList(OS,
1107                                                         T->getArgs(),
1108                                                         T->getNumArgs(),
1109                                                         Policy);
1110   spaceBeforePlaceHolder(OS);
1111 }
1112 void TypePrinter::printDependentTemplateSpecializationAfter(
1113         const DependentTemplateSpecializationType *T, raw_ostream &OS) { }
1114 
1115 void TypePrinter::printPackExpansionBefore(const PackExpansionType *T,
1116                                            raw_ostream &OS) {
1117   printBefore(T->getPattern(), OS);
1118 }
1119 void TypePrinter::printPackExpansionAfter(const PackExpansionType *T,
1120                                           raw_ostream &OS) {
1121   printAfter(T->getPattern(), OS);
1122   OS << "...";
1123 }
1124 
1125 void TypePrinter::printAttributedBefore(const AttributedType *T,
1126                                         raw_ostream &OS) {
1127   // Prefer the macro forms of the GC and ownership qualifiers.
1128   if (T->getAttrKind() == AttributedType::attr_objc_gc ||
1129       T->getAttrKind() == AttributedType::attr_objc_ownership)
1130     return printBefore(T->getEquivalentType(), OS);
1131 
1132   if (T->getAttrKind() == AttributedType::attr_objc_kindof)
1133     OS << "__kindof ";
1134 
1135   printBefore(T->getModifiedType(), OS);
1136 
1137   if (T->isMSTypeSpec()) {
1138     switch (T->getAttrKind()) {
1139     default: return;
1140     case AttributedType::attr_ptr32: OS << " __ptr32"; break;
1141     case AttributedType::attr_ptr64: OS << " __ptr64"; break;
1142     case AttributedType::attr_sptr: OS << " __sptr"; break;
1143     case AttributedType::attr_uptr: OS << " __uptr"; break;
1144     }
1145     spaceBeforePlaceHolder(OS);
1146   }
1147 
1148   // Print nullability type specifiers.
1149   if (T->getAttrKind() == AttributedType::attr_nonnull ||
1150       T->getAttrKind() == AttributedType::attr_nullable ||
1151       T->getAttrKind() == AttributedType::attr_null_unspecified) {
1152     if (T->getAttrKind() == AttributedType::attr_nonnull)
1153       OS << " _Nonnull";
1154     else if (T->getAttrKind() == AttributedType::attr_nullable)
1155       OS << " _Nullable";
1156     else if (T->getAttrKind() == AttributedType::attr_null_unspecified)
1157       OS << " _Null_unspecified";
1158     else
1159       llvm_unreachable("unhandled nullability");
1160     spaceBeforePlaceHolder(OS);
1161   }
1162 }
1163 
1164 void TypePrinter::printAttributedAfter(const AttributedType *T,
1165                                        raw_ostream &OS) {
1166   // Prefer the macro forms of the GC and ownership qualifiers.
1167   if (T->getAttrKind() == AttributedType::attr_objc_gc ||
1168       T->getAttrKind() == AttributedType::attr_objc_ownership)
1169     return printAfter(T->getEquivalentType(), OS);
1170 
1171   if (T->getAttrKind() == AttributedType::attr_objc_kindof)
1172     return;
1173 
1174   // TODO: not all attributes are GCC-style attributes.
1175   if (T->isMSTypeSpec())
1176     return;
1177 
1178   // Nothing to print after.
1179   if (T->getAttrKind() == AttributedType::attr_nonnull ||
1180       T->getAttrKind() == AttributedType::attr_nullable ||
1181       T->getAttrKind() == AttributedType::attr_null_unspecified)
1182     return printAfter(T->getModifiedType(), OS);
1183 
1184   // If this is a calling convention attribute, don't print the implicit CC from
1185   // the modified type.
1186   SaveAndRestore<bool> MaybeSuppressCC(InsideCCAttribute, T->isCallingConv());
1187 
1188   printAfter(T->getModifiedType(), OS);
1189 
1190   // Print nullability type specifiers that occur after
1191   if (T->getAttrKind() == AttributedType::attr_nonnull ||
1192       T->getAttrKind() == AttributedType::attr_nullable ||
1193       T->getAttrKind() == AttributedType::attr_null_unspecified) {
1194     if (T->getAttrKind() == AttributedType::attr_nonnull)
1195       OS << " _Nonnull";
1196     else if (T->getAttrKind() == AttributedType::attr_nullable)
1197       OS << " _Nullable";
1198     else if (T->getAttrKind() == AttributedType::attr_null_unspecified)
1199       OS << " _Null_unspecified";
1200     else
1201       llvm_unreachable("unhandled nullability");
1202 
1203     return;
1204   }
1205 
1206   OS << " __attribute__((";
1207   switch (T->getAttrKind()) {
1208   default: llvm_unreachable("This attribute should have been handled already");
1209   case AttributedType::attr_address_space:
1210     OS << "address_space(";
1211     OS << T->getEquivalentType().getAddressSpace();
1212     OS << ')';
1213     break;
1214 
1215   case AttributedType::attr_vector_size: {
1216     OS << "__vector_size__(";
1217     if (const VectorType *vector =T->getEquivalentType()->getAs<VectorType>()) {
1218       OS << vector->getNumElements();
1219       OS << " * sizeof(";
1220       print(vector->getElementType(), OS, StringRef());
1221       OS << ')';
1222     }
1223     OS << ')';
1224     break;
1225   }
1226 
1227   case AttributedType::attr_neon_vector_type:
1228   case AttributedType::attr_neon_polyvector_type: {
1229     if (T->getAttrKind() == AttributedType::attr_neon_vector_type)
1230       OS << "neon_vector_type(";
1231     else
1232       OS << "neon_polyvector_type(";
1233     const VectorType *vector = T->getEquivalentType()->getAs<VectorType>();
1234     OS << vector->getNumElements();
1235     OS << ')';
1236     break;
1237   }
1238 
1239   case AttributedType::attr_regparm: {
1240     // FIXME: When Sema learns to form this AttributedType, avoid printing the
1241     // attribute again in printFunctionProtoAfter.
1242     OS << "regparm(";
1243     QualType t = T->getEquivalentType();
1244     while (!t->isFunctionType())
1245       t = t->getPointeeType();
1246     OS << t->getAs<FunctionType>()->getRegParmType();
1247     OS << ')';
1248     break;
1249   }
1250 
1251   case AttributedType::attr_objc_gc: {
1252     OS << "objc_gc(";
1253 
1254     QualType tmp = T->getEquivalentType();
1255     while (tmp.getObjCGCAttr() == Qualifiers::GCNone) {
1256       QualType next = tmp->getPointeeType();
1257       if (next == tmp) break;
1258       tmp = next;
1259     }
1260 
1261     if (tmp.isObjCGCWeak())
1262       OS << "weak";
1263     else
1264       OS << "strong";
1265     OS << ')';
1266     break;
1267   }
1268 
1269   case AttributedType::attr_objc_ownership:
1270     OS << "objc_ownership(";
1271     switch (T->getEquivalentType().getObjCLifetime()) {
1272     case Qualifiers::OCL_None: llvm_unreachable("no ownership!");
1273     case Qualifiers::OCL_ExplicitNone: OS << "none"; break;
1274     case Qualifiers::OCL_Strong: OS << "strong"; break;
1275     case Qualifiers::OCL_Weak: OS << "weak"; break;
1276     case Qualifiers::OCL_Autoreleasing: OS << "autoreleasing"; break;
1277     }
1278     OS << ')';
1279     break;
1280 
1281   // FIXME: When Sema learns to form this AttributedType, avoid printing the
1282   // attribute again in printFunctionProtoAfter.
1283   case AttributedType::attr_noreturn: OS << "noreturn"; break;
1284 
1285   case AttributedType::attr_cdecl: OS << "cdecl"; break;
1286   case AttributedType::attr_fastcall: OS << "fastcall"; break;
1287   case AttributedType::attr_stdcall: OS << "stdcall"; break;
1288   case AttributedType::attr_thiscall: OS << "thiscall"; break;
1289   case AttributedType::attr_vectorcall: OS << "vectorcall"; break;
1290   case AttributedType::attr_pascal: OS << "pascal"; break;
1291   case AttributedType::attr_ms_abi: OS << "ms_abi"; break;
1292   case AttributedType::attr_sysv_abi: OS << "sysv_abi"; break;
1293   case AttributedType::attr_pcs:
1294   case AttributedType::attr_pcs_vfp: {
1295     OS << "pcs(";
1296    QualType t = T->getEquivalentType();
1297    while (!t->isFunctionType())
1298      t = t->getPointeeType();
1299    OS << (t->getAs<FunctionType>()->getCallConv() == CC_AAPCS ?
1300          "\"aapcs\"" : "\"aapcs-vfp\"");
1301    OS << ')';
1302    break;
1303   }
1304   case AttributedType::attr_inteloclbicc: OS << "inteloclbicc"; break;
1305   }
1306   OS << "))";
1307 }
1308 
1309 void TypePrinter::printObjCInterfaceBefore(const ObjCInterfaceType *T,
1310                                            raw_ostream &OS) {
1311   OS << T->getDecl()->getName();
1312   spaceBeforePlaceHolder(OS);
1313 }
1314 void TypePrinter::printObjCInterfaceAfter(const ObjCInterfaceType *T,
1315                                           raw_ostream &OS) { }
1316 
1317 void TypePrinter::printObjCObjectBefore(const ObjCObjectType *T,
1318                                         raw_ostream &OS) {
1319   if (T->qual_empty() && T->isUnspecializedAsWritten() &&
1320       !T->isKindOfTypeAsWritten())
1321     return printBefore(T->getBaseType(), OS);
1322 
1323   if (T->isKindOfTypeAsWritten())
1324     OS << "__kindof ";
1325 
1326   print(T->getBaseType(), OS, StringRef());
1327 
1328   if (T->isSpecializedAsWritten()) {
1329     bool isFirst = true;
1330     OS << '<';
1331     for (auto typeArg : T->getTypeArgsAsWritten()) {
1332       if (isFirst)
1333         isFirst = false;
1334       else
1335         OS << ",";
1336 
1337       print(typeArg, OS, StringRef());
1338     }
1339     OS << '>';
1340   }
1341 
1342   if (!T->qual_empty()) {
1343     bool isFirst = true;
1344     OS << '<';
1345     for (const auto *I : T->quals()) {
1346       if (isFirst)
1347         isFirst = false;
1348       else
1349         OS << ',';
1350       OS << I->getName();
1351     }
1352     OS << '>';
1353   }
1354 
1355   spaceBeforePlaceHolder(OS);
1356 }
1357 void TypePrinter::printObjCObjectAfter(const ObjCObjectType *T,
1358                                         raw_ostream &OS) {
1359   if (T->qual_empty() && T->isUnspecializedAsWritten() &&
1360       !T->isKindOfTypeAsWritten())
1361     return printAfter(T->getBaseType(), OS);
1362 }
1363 
1364 void TypePrinter::printObjCObjectPointerBefore(const ObjCObjectPointerType *T,
1365                                                raw_ostream &OS) {
1366   printBefore(T->getPointeeType(), OS);
1367 
1368   // If we need to print the pointer, print it now.
1369   if (!T->isObjCIdType() && !T->isObjCQualifiedIdType() &&
1370       !T->isObjCClassType() && !T->isObjCQualifiedClassType()) {
1371     if (HasEmptyPlaceHolder)
1372       OS << ' ';
1373     OS << '*';
1374   }
1375 }
1376 void TypePrinter::printObjCObjectPointerAfter(const ObjCObjectPointerType *T,
1377                                               raw_ostream &OS) { }
1378 
1379 void TemplateSpecializationType::
1380   PrintTemplateArgumentList(raw_ostream &OS,
1381                             const TemplateArgumentListInfo &Args,
1382                             const PrintingPolicy &Policy) {
1383   return PrintTemplateArgumentList(OS,
1384                                    Args.getArgumentArray(),
1385                                    Args.size(),
1386                                    Policy);
1387 }
1388 
1389 void
1390 TemplateSpecializationType::PrintTemplateArgumentList(
1391                                                 raw_ostream &OS,
1392                                                 const TemplateArgument *Args,
1393                                                 unsigned NumArgs,
1394                                                   const PrintingPolicy &Policy,
1395                                                       bool SkipBrackets) {
1396   if (!SkipBrackets)
1397     OS << '<';
1398 
1399   bool needSpace = false;
1400   for (unsigned Arg = 0; Arg < NumArgs; ++Arg) {
1401     // Print the argument into a string.
1402     SmallString<128> Buf;
1403     llvm::raw_svector_ostream ArgOS(Buf);
1404     if (Args[Arg].getKind() == TemplateArgument::Pack) {
1405       if (Args[Arg].pack_size() && Arg > 0)
1406         OS << ", ";
1407       PrintTemplateArgumentList(ArgOS,
1408                                 Args[Arg].pack_begin(),
1409                                 Args[Arg].pack_size(),
1410                                 Policy, true);
1411     } else {
1412       if (Arg > 0)
1413         OS << ", ";
1414       Args[Arg].print(Policy, ArgOS);
1415     }
1416     StringRef ArgString = ArgOS.str();
1417 
1418     // If this is the first argument and its string representation
1419     // begins with the global scope specifier ('::foo'), add a space
1420     // to avoid printing the diagraph '<:'.
1421     if (!Arg && !ArgString.empty() && ArgString[0] == ':')
1422       OS << ' ';
1423 
1424     OS << ArgString;
1425 
1426     needSpace = (!ArgString.empty() && ArgString.back() == '>');
1427   }
1428 
1429   // If the last character of our string is '>', add another space to
1430   // keep the two '>''s separate tokens. We don't *have* to do this in
1431   // C++0x, but it's still good hygiene.
1432   if (needSpace)
1433     OS << ' ';
1434 
1435   if (!SkipBrackets)
1436     OS << '>';
1437 }
1438 
1439 // Sadly, repeat all that with TemplateArgLoc.
1440 void TemplateSpecializationType::
1441 PrintTemplateArgumentList(raw_ostream &OS,
1442                           const TemplateArgumentLoc *Args, unsigned NumArgs,
1443                           const PrintingPolicy &Policy) {
1444   OS << '<';
1445 
1446   bool needSpace = false;
1447   for (unsigned Arg = 0; Arg < NumArgs; ++Arg) {
1448     if (Arg > 0)
1449       OS << ", ";
1450 
1451     // Print the argument into a string.
1452     SmallString<128> Buf;
1453     llvm::raw_svector_ostream ArgOS(Buf);
1454     if (Args[Arg].getArgument().getKind() == TemplateArgument::Pack) {
1455       PrintTemplateArgumentList(ArgOS,
1456                                 Args[Arg].getArgument().pack_begin(),
1457                                 Args[Arg].getArgument().pack_size(),
1458                                 Policy, true);
1459     } else {
1460       Args[Arg].getArgument().print(Policy, ArgOS);
1461     }
1462     StringRef ArgString = ArgOS.str();
1463 
1464     // If this is the first argument and its string representation
1465     // begins with the global scope specifier ('::foo'), add a space
1466     // to avoid printing the diagraph '<:'.
1467     if (!Arg && !ArgString.empty() && ArgString[0] == ':')
1468       OS << ' ';
1469 
1470     OS << ArgString;
1471 
1472     needSpace = (!ArgString.empty() && ArgString.back() == '>');
1473   }
1474 
1475   // If the last character of our string is '>', add another space to
1476   // keep the two '>''s separate tokens. We don't *have* to do this in
1477   // C++0x, but it's still good hygiene.
1478   if (needSpace)
1479     OS << ' ';
1480 
1481   OS << '>';
1482 }
1483 
1484 std::string Qualifiers::getAsString() const {
1485   LangOptions LO;
1486   return getAsString(PrintingPolicy(LO));
1487 }
1488 
1489 // Appends qualifiers to the given string, separated by spaces.  Will
1490 // prefix a space if the string is non-empty.  Will not append a final
1491 // space.
1492 std::string Qualifiers::getAsString(const PrintingPolicy &Policy) const {
1493   SmallString<64> Buf;
1494   llvm::raw_svector_ostream StrOS(Buf);
1495   print(StrOS, Policy);
1496   return StrOS.str();
1497 }
1498 
1499 bool Qualifiers::isEmptyWhenPrinted(const PrintingPolicy &Policy) const {
1500   if (getCVRQualifiers())
1501     return false;
1502 
1503   if (getAddressSpace())
1504     return false;
1505 
1506   if (getObjCGCAttr())
1507     return false;
1508 
1509   if (Qualifiers::ObjCLifetime lifetime = getObjCLifetime())
1510     if (!(lifetime == Qualifiers::OCL_Strong && Policy.SuppressStrongLifetime))
1511       return false;
1512 
1513   return true;
1514 }
1515 
1516 // Appends qualifiers to the given string, separated by spaces.  Will
1517 // prefix a space if the string is non-empty.  Will not append a final
1518 // space.
1519 void Qualifiers::print(raw_ostream &OS, const PrintingPolicy& Policy,
1520                        bool appendSpaceIfNonEmpty) const {
1521   bool addSpace = false;
1522 
1523   unsigned quals = getCVRQualifiers();
1524   if (quals) {
1525     AppendTypeQualList(OS, quals, Policy.LangOpts.C99);
1526     addSpace = true;
1527   }
1528   if (unsigned addrspace = getAddressSpace()) {
1529     if (addSpace)
1530       OS << ' ';
1531     addSpace = true;
1532     switch (addrspace) {
1533       case LangAS::opencl_global:
1534         OS << "__global";
1535         break;
1536       case LangAS::opencl_local:
1537         OS << "__local";
1538         break;
1539       case LangAS::opencl_constant:
1540         OS << "__constant";
1541         break;
1542       case LangAS::opencl_generic:
1543         OS << "__generic";
1544         break;
1545       default:
1546         OS << "__attribute__((address_space(";
1547         OS << addrspace;
1548         OS << ")))";
1549     }
1550   }
1551   if (Qualifiers::GC gc = getObjCGCAttr()) {
1552     if (addSpace)
1553       OS << ' ';
1554     addSpace = true;
1555     if (gc == Qualifiers::Weak)
1556       OS << "__weak";
1557     else
1558       OS << "__strong";
1559   }
1560   if (Qualifiers::ObjCLifetime lifetime = getObjCLifetime()) {
1561     if (!(lifetime == Qualifiers::OCL_Strong && Policy.SuppressStrongLifetime)){
1562       if (addSpace)
1563         OS << ' ';
1564       addSpace = true;
1565     }
1566 
1567     switch (lifetime) {
1568     case Qualifiers::OCL_None: llvm_unreachable("none but true");
1569     case Qualifiers::OCL_ExplicitNone: OS << "__unsafe_unretained"; break;
1570     case Qualifiers::OCL_Strong:
1571       if (!Policy.SuppressStrongLifetime)
1572         OS << "__strong";
1573       break;
1574 
1575     case Qualifiers::OCL_Weak: OS << "__weak"; break;
1576     case Qualifiers::OCL_Autoreleasing: OS << "__autoreleasing"; break;
1577     }
1578   }
1579 
1580   if (appendSpaceIfNonEmpty && addSpace)
1581     OS << ' ';
1582 }
1583 
1584 std::string QualType::getAsString(const PrintingPolicy &Policy) const {
1585   std::string S;
1586   getAsStringInternal(S, Policy);
1587   return S;
1588 }
1589 
1590 std::string QualType::getAsString(const Type *ty, Qualifiers qs) {
1591   std::string buffer;
1592   LangOptions options;
1593   getAsStringInternal(ty, qs, buffer, PrintingPolicy(options));
1594   return buffer;
1595 }
1596 
1597 void QualType::print(const Type *ty, Qualifiers qs,
1598                      raw_ostream &OS, const PrintingPolicy &policy,
1599                      const Twine &PlaceHolder) {
1600   SmallString<128> PHBuf;
1601   StringRef PH = PlaceHolder.toStringRef(PHBuf);
1602 
1603   TypePrinter(policy).print(ty, qs, OS, PH);
1604 }
1605 
1606 void QualType::getAsStringInternal(const Type *ty, Qualifiers qs,
1607                                    std::string &buffer,
1608                                    const PrintingPolicy &policy) {
1609   SmallString<256> Buf;
1610   llvm::raw_svector_ostream StrOS(Buf);
1611   TypePrinter(policy).print(ty, qs, StrOS, buffer);
1612   std::string str = StrOS.str();
1613   buffer.swap(str);
1614 }
1615