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