1 //===- llvm/Support/YAMLTraits.h --------------------------------*- C++ -*-===//
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #ifndef LLVM_SUPPORT_YAMLTRAITS_H
11 #define LLVM_SUPPORT_YAMLTRAITS_H
14 #include "llvm/ADT/DenseMap.h"
15 #include "llvm/ADT/DenseMapInfo.h"
16 #include "llvm/ADT/Optional.h"
17 #include "llvm/ADT/SmallVector.h"
18 #include "llvm/ADT/StringMap.h"
19 #include "llvm/ADT/StringRef.h"
20 #include "llvm/ADT/StringSwitch.h"
21 #include "llvm/ADT/Twine.h"
22 #include "llvm/Support/Compiler.h"
23 #include "llvm/Support/Regex.h"
24 #include "llvm/Support/SourceMgr.h"
25 #include "llvm/Support/YAMLParser.h"
26 #include "llvm/Support/raw_ostream.h"
27 #include <system_error>
33 /// This class should be specialized by any type that needs to be converted
34 /// to/from a YAML mapping. For example:
36 /// struct MappingTraits<MyStruct> {
37 /// static void mapping(IO &io, MyStruct &s) {
38 /// io.mapRequired("name", s.name);
39 /// io.mapRequired("size", s.size);
40 /// io.mapOptional("age", s.age);
44 struct MappingTraits {
46 // static void mapping(IO &io, T &fields);
47 // Optionally may provide:
48 // static StringRef validate(IO &io, T &fields);
52 /// This class should be specialized by any integral type that converts
53 /// to/from a YAML scalar where there is a one-to-one mapping between
54 /// in-memory values and a string in YAML. For example:
56 /// struct ScalarEnumerationTraits<Colors> {
57 /// static void enumeration(IO &io, Colors &value) {
58 /// io.enumCase(value, "red", cRed);
59 /// io.enumCase(value, "blue", cBlue);
60 /// io.enumCase(value, "green", cGreen);
64 struct ScalarEnumerationTraits {
66 // static void enumeration(IO &io, T &value);
70 /// This class should be specialized by any integer type that is a union
71 /// of bit values and the YAML representation is a flow sequence of
72 /// strings. For example:
74 /// struct ScalarBitSetTraits<MyFlags> {
75 /// static void bitset(IO &io, MyFlags &value) {
76 /// io.bitSetCase(value, "big", flagBig);
77 /// io.bitSetCase(value, "flat", flagFlat);
78 /// io.bitSetCase(value, "round", flagRound);
82 struct ScalarBitSetTraits {
84 // static void bitset(IO &io, T &value);
88 /// This class should be specialized by type that requires custom conversion
89 /// to/from a yaml scalar. For example:
92 /// struct ScalarTraits<MyType> {
93 /// static void output(const MyType &val, void*, llvm::raw_ostream &out) {
94 /// // stream out custom formatting
95 /// out << llvm::format("%x", val);
97 /// static StringRef input(StringRef scalar, void*, MyType &value) {
98 /// // parse scalar and set `value`
99 /// // return empty string on success, or error string
100 /// return StringRef();
102 /// static bool mustQuote(StringRef) { return true; }
105 struct ScalarTraits {
108 // Function to write the value as a string:
109 //static void output(const T &value, void *ctxt, llvm::raw_ostream &out);
111 // Function to convert a string to a value. Returns the empty
112 // StringRef on success or an error string if string is malformed:
113 //static StringRef input(StringRef scalar, void *ctxt, T &value);
115 // Function to determine if the value should be quoted.
116 //static bool mustQuote(StringRef);
120 /// This class should be specialized by any type that needs to be converted
121 /// to/from a YAML sequence. For example:
124 /// struct SequenceTraits< std::vector<MyType> > {
125 /// static size_t size(IO &io, std::vector<MyType> &seq) {
126 /// return seq.size();
128 /// static MyType& element(IO &, std::vector<MyType> &seq, size_t index) {
129 /// if ( index >= seq.size() )
130 /// seq.resize(index+1);
131 /// return seq[index];
135 struct SequenceTraits {
137 // static size_t size(IO &io, T &seq);
138 // static T::value_type& element(IO &io, T &seq, size_t index);
140 // The following is option and will cause generated YAML to use
141 // a flow sequence (e.g. [a,b,c]).
142 // static const bool flow = true;
146 /// This class should be specialized by any type that needs to be converted
147 /// to/from a list of YAML documents.
149 struct DocumentListTraits {
151 // static size_t size(IO &io, T &seq);
152 // static T::value_type& element(IO &io, T &seq, size_t index);
156 // Only used by compiler if both template types are the same
157 template <typename T, T>
160 // Only used for better diagnostics of missing traits
161 template <typename T>
166 // Test if ScalarEnumerationTraits<T> is defined on type T.
168 struct has_ScalarEnumerationTraits
170 typedef void (*Signature_enumeration)(class IO&, T&);
172 template <typename U>
173 static char test(SameType<Signature_enumeration, &U::enumeration>*);
175 template <typename U>
176 static double test(...);
179 static bool const value =
180 (sizeof(test<ScalarEnumerationTraits<T> >(nullptr)) == 1);
184 // Test if ScalarBitSetTraits<T> is defined on type T.
186 struct has_ScalarBitSetTraits
188 typedef void (*Signature_bitset)(class IO&, T&);
190 template <typename U>
191 static char test(SameType<Signature_bitset, &U::bitset>*);
193 template <typename U>
194 static double test(...);
197 static bool const value = (sizeof(test<ScalarBitSetTraits<T> >(nullptr)) == 1);
201 // Test if ScalarTraits<T> is defined on type T.
203 struct has_ScalarTraits
205 typedef StringRef (*Signature_input)(StringRef, void*, T&);
206 typedef void (*Signature_output)(const T&, void*, llvm::raw_ostream&);
207 typedef bool (*Signature_mustQuote)(StringRef);
209 template <typename U>
210 static char test(SameType<Signature_input, &U::input> *,
211 SameType<Signature_output, &U::output> *,
212 SameType<Signature_mustQuote, &U::mustQuote> *);
214 template <typename U>
215 static double test(...);
218 static bool const value =
219 (sizeof(test<ScalarTraits<T>>(nullptr, nullptr, nullptr)) == 1);
223 // Test if MappingTraits<T> is defined on type T.
225 struct has_MappingTraits
227 typedef void (*Signature_mapping)(class IO&, T&);
229 template <typename U>
230 static char test(SameType<Signature_mapping, &U::mapping>*);
232 template <typename U>
233 static double test(...);
236 static bool const value = (sizeof(test<MappingTraits<T> >(nullptr)) == 1);
239 // Test if MappingTraits<T>::validate() is defined on type T.
241 struct has_MappingValidateTraits
243 typedef StringRef (*Signature_validate)(class IO&, T&);
245 template <typename U>
246 static char test(SameType<Signature_validate, &U::validate>*);
248 template <typename U>
249 static double test(...);
252 static bool const value = (sizeof(test<MappingTraits<T> >(nullptr)) == 1);
257 // Test if SequenceTraits<T> is defined on type T.
259 struct has_SequenceMethodTraits
261 typedef size_t (*Signature_size)(class IO&, T&);
263 template <typename U>
264 static char test(SameType<Signature_size, &U::size>*);
266 template <typename U>
267 static double test(...);
270 static bool const value = (sizeof(test<SequenceTraits<T> >(nullptr)) == 1);
274 // has_FlowTraits<int> will cause an error with some compilers because
275 // it subclasses int. Using this wrapper only instantiates the
276 // real has_FlowTraits only if the template type is a class.
277 template <typename T, bool Enabled = std::is_class<T>::value>
281 static const bool value = false;
284 // Some older gcc compilers don't support straight forward tests
285 // for members, so test for ambiguity cause by the base and derived
286 // classes both defining the member.
288 struct has_FlowTraits<T, true>
290 struct Fallback { bool flow; };
291 struct Derived : T, Fallback { };
294 static char (&f(SameType<bool Fallback::*, &C::flow>*))[1];
297 static char (&f(...))[2];
300 static bool const value = sizeof(f<Derived>(nullptr)) == 2;
305 // Test if SequenceTraits<T> is defined on type T
307 struct has_SequenceTraits : public std::integral_constant<bool,
308 has_SequenceMethodTraits<T>::value > { };
311 // Test if DocumentListTraits<T> is defined on type T
313 struct has_DocumentListTraits
315 typedef size_t (*Signature_size)(class IO&, T&);
317 template <typename U>
318 static char test(SameType<Signature_size, &U::size>*);
320 template <typename U>
321 static double test(...);
324 static bool const value = (sizeof(test<DocumentListTraits<T> >(nullptr))==1);
327 inline bool isNumber(StringRef S) {
328 static const char OctalChars[] = "01234567";
329 if (S.startswith("0") &&
330 S.drop_front().find_first_not_of(OctalChars) == StringRef::npos)
333 if (S.startswith("0o") &&
334 S.drop_front(2).find_first_not_of(OctalChars) == StringRef::npos)
337 static const char HexChars[] = "0123456789abcdefABCDEF";
338 if (S.startswith("0x") &&
339 S.drop_front(2).find_first_not_of(HexChars) == StringRef::npos)
342 static const char DecChars[] = "0123456789";
343 if (S.find_first_not_of(DecChars) == StringRef::npos)
346 if (S.equals(".inf") || S.equals(".Inf") || S.equals(".INF"))
349 Regex FloatMatcher("^(\\.[0-9]+|[0-9]+(\\.[0-9]*)?)([eE][-+]?[0-9]+)?$");
350 if (FloatMatcher.match(S))
356 inline bool isNumeric(StringRef S) {
357 if ((S.front() == '-' || S.front() == '+') && isNumber(S.drop_front()))
363 if (S.equals(".nan") || S.equals(".NaN") || S.equals(".NAN"))
369 inline bool isNull(StringRef S) {
370 return S.equals("null") || S.equals("Null") || S.equals("NULL") ||
374 inline bool isBool(StringRef S) {
375 return S.equals("true") || S.equals("True") || S.equals("TRUE") ||
376 S.equals("false") || S.equals("False") || S.equals("FALSE");
379 inline bool needsQuotes(StringRef S) {
382 if (isspace(S.front()) || isspace(S.back()))
384 if (S.front() == ',')
387 static const char ScalarSafeChars[] =
388 "abcdefghijklmnopqrstuvwxyz"
389 "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_-/^., \t";
390 if (S.find_first_not_of(ScalarSafeChars) != StringRef::npos)
405 struct missingTraits : public std::integral_constant<bool,
406 !has_ScalarEnumerationTraits<T>::value
407 && !has_ScalarBitSetTraits<T>::value
408 && !has_ScalarTraits<T>::value
409 && !has_MappingTraits<T>::value
410 && !has_SequenceTraits<T>::value
411 && !has_DocumentListTraits<T>::value > {};
414 struct validatedMappingTraits : public std::integral_constant<bool,
415 has_MappingTraits<T>::value
416 && has_MappingValidateTraits<T>::value> {};
419 struct unvalidatedMappingTraits : public std::integral_constant<bool,
420 has_MappingTraits<T>::value
421 && !has_MappingValidateTraits<T>::value> {};
422 // Base class for Input and Output.
426 IO(void *Ctxt=nullptr);
429 virtual bool outputting() = 0;
431 virtual unsigned beginSequence() = 0;
432 virtual bool preflightElement(unsigned, void *&) = 0;
433 virtual void postflightElement(void*) = 0;
434 virtual void endSequence() = 0;
435 virtual bool canElideEmptySequence() = 0;
437 virtual unsigned beginFlowSequence() = 0;
438 virtual bool preflightFlowElement(unsigned, void *&) = 0;
439 virtual void postflightFlowElement(void*) = 0;
440 virtual void endFlowSequence() = 0;
442 virtual bool mapTag(StringRef Tag, bool Default=false) = 0;
443 virtual void beginMapping() = 0;
444 virtual void endMapping() = 0;
445 virtual bool preflightKey(const char*, bool, bool, bool &, void *&) = 0;
446 virtual void postflightKey(void*) = 0;
448 virtual void beginEnumScalar() = 0;
449 virtual bool matchEnumScalar(const char*, bool) = 0;
450 virtual bool matchEnumFallback() = 0;
451 virtual void endEnumScalar() = 0;
453 virtual bool beginBitSetScalar(bool &) = 0;
454 virtual bool bitSetMatch(const char*, bool) = 0;
455 virtual void endBitSetScalar() = 0;
457 virtual void scalarString(StringRef &, bool) = 0;
459 virtual void setError(const Twine &) = 0;
461 template <typename T>
462 void enumCase(T &Val, const char* Str, const T ConstVal) {
463 if ( matchEnumScalar(Str, outputting() && Val == ConstVal) ) {
468 // allow anonymous enum values to be used with LLVM_YAML_STRONG_TYPEDEF
469 template <typename T>
470 void enumCase(T &Val, const char* Str, const uint32_t ConstVal) {
471 if ( matchEnumScalar(Str, outputting() && Val == static_cast<T>(ConstVal)) ) {
476 template <typename FBT, typename T>
477 void enumFallback(T &Val) {
478 if ( matchEnumFallback() ) {
480 yamlize(*this, Res, true);
485 template <typename T>
486 void bitSetCase(T &Val, const char* Str, const T ConstVal) {
487 if ( bitSetMatch(Str, outputting() && (Val & ConstVal) == ConstVal) ) {
488 Val = Val | ConstVal;
492 // allow anonymous enum values to be used with LLVM_YAML_STRONG_TYPEDEF
493 template <typename T>
494 void bitSetCase(T &Val, const char* Str, const uint32_t ConstVal) {
495 if ( bitSetMatch(Str, outputting() && (Val & ConstVal) == ConstVal) ) {
496 Val = Val | ConstVal;
500 template <typename T>
501 void maskedBitSetCase(T &Val, const char *Str, T ConstVal, T Mask) {
502 if (bitSetMatch(Str, outputting() && (Val & Mask) == ConstVal))
503 Val = Val | ConstVal;
506 template <typename T>
507 void maskedBitSetCase(T &Val, const char *Str, uint32_t ConstVal,
509 if (bitSetMatch(Str, outputting() && (Val & Mask) == ConstVal))
510 Val = Val | ConstVal;
514 void setContext(void *);
516 template <typename T>
517 void mapRequired(const char* Key, T& Val) {
518 this->processKey(Key, Val, true);
521 template <typename T>
522 typename std::enable_if<has_SequenceTraits<T>::value,void>::type
523 mapOptional(const char* Key, T& Val) {
524 // omit key/value instead of outputting empty sequence
525 if ( this->canElideEmptySequence() && !(Val.begin() != Val.end()) )
527 this->processKey(Key, Val, false);
530 template <typename T>
531 void mapOptional(const char* Key, Optional<T> &Val) {
532 processKeyWithDefault(Key, Val, Optional<T>(), /*Required=*/false);
535 template <typename T>
536 typename std::enable_if<!has_SequenceTraits<T>::value,void>::type
537 mapOptional(const char* Key, T& Val) {
538 this->processKey(Key, Val, false);
541 template <typename T>
542 void mapOptional(const char* Key, T& Val, const T& Default) {
543 this->processKeyWithDefault(Key, Val, Default, false);
547 template <typename T>
548 void processKeyWithDefault(const char *Key, Optional<T> &Val,
549 const Optional<T> &DefaultValue, bool Required) {
550 assert(DefaultValue.hasValue() == false &&
551 "Optional<T> shouldn't have a value!");
554 const bool sameAsDefault = outputting() && !Val.hasValue();
555 if (!outputting() && !Val.hasValue())
557 if (this->preflightKey(Key, Required, sameAsDefault, UseDefault,
559 yamlize(*this, Val.getValue(), Required);
560 this->postflightKey(SaveInfo);
567 template <typename T>
568 void processKeyWithDefault(const char *Key, T &Val, const T& DefaultValue,
572 const bool sameAsDefault = outputting() && Val == DefaultValue;
573 if ( this->preflightKey(Key, Required, sameAsDefault, UseDefault,
575 yamlize(*this, Val, Required);
576 this->postflightKey(SaveInfo);
584 template <typename T>
585 void processKey(const char *Key, T &Val, bool Required) {
588 if ( this->preflightKey(Key, Required, false, UseDefault, SaveInfo) ) {
589 yamlize(*this, Val, Required);
590 this->postflightKey(SaveInfo);
601 typename std::enable_if<has_ScalarEnumerationTraits<T>::value,void>::type
602 yamlize(IO &io, T &Val, bool) {
603 io.beginEnumScalar();
604 ScalarEnumerationTraits<T>::enumeration(io, Val);
609 typename std::enable_if<has_ScalarBitSetTraits<T>::value,void>::type
610 yamlize(IO &io, T &Val, bool) {
612 if ( io.beginBitSetScalar(DoClear) ) {
614 Val = static_cast<T>(0);
615 ScalarBitSetTraits<T>::bitset(io, Val);
616 io.endBitSetScalar();
622 typename std::enable_if<has_ScalarTraits<T>::value,void>::type
623 yamlize(IO &io, T &Val, bool) {
624 if ( io.outputting() ) {
626 llvm::raw_string_ostream Buffer(Storage);
627 ScalarTraits<T>::output(Val, io.getContext(), Buffer);
628 StringRef Str = Buffer.str();
629 io.scalarString(Str, ScalarTraits<T>::mustQuote(Str));
633 io.scalarString(Str, ScalarTraits<T>::mustQuote(Str));
634 StringRef Result = ScalarTraits<T>::input(Str, io.getContext(), Val);
635 if ( !Result.empty() ) {
636 io.setError(llvm::Twine(Result));
643 typename std::enable_if<validatedMappingTraits<T>::value, void>::type
644 yamlize(IO &io, T &Val, bool) {
646 if (io.outputting()) {
647 StringRef Err = MappingTraits<T>::validate(io, Val);
649 llvm::errs() << Err << "\n";
650 assert(Err.empty() && "invalid struct trying to be written as yaml");
653 MappingTraits<T>::mapping(io, Val);
654 if (!io.outputting()) {
655 StringRef Err = MappingTraits<T>::validate(io, Val);
663 typename std::enable_if<unvalidatedMappingTraits<T>::value, void>::type
664 yamlize(IO &io, T &Val, bool) {
666 MappingTraits<T>::mapping(io, Val);
671 typename std::enable_if<missingTraits<T>::value, void>::type
672 yamlize(IO &io, T &Val, bool) {
673 char missing_yaml_trait_for_type[sizeof(MissingTrait<T>)];
677 typename std::enable_if<has_SequenceTraits<T>::value,void>::type
678 yamlize(IO &io, T &Seq, bool) {
679 if ( has_FlowTraits< SequenceTraits<T> >::value ) {
680 unsigned incnt = io.beginFlowSequence();
681 unsigned count = io.outputting() ? SequenceTraits<T>::size(io, Seq) : incnt;
682 for(unsigned i=0; i < count; ++i) {
684 if ( io.preflightFlowElement(i, SaveInfo) ) {
685 yamlize(io, SequenceTraits<T>::element(io, Seq, i), true);
686 io.postflightFlowElement(SaveInfo);
689 io.endFlowSequence();
692 unsigned incnt = io.beginSequence();
693 unsigned count = io.outputting() ? SequenceTraits<T>::size(io, Seq) : incnt;
694 for(unsigned i=0; i < count; ++i) {
696 if ( io.preflightElement(i, SaveInfo) ) {
697 yamlize(io, SequenceTraits<T>::element(io, Seq, i), true);
698 io.postflightElement(SaveInfo);
707 struct ScalarTraits<bool> {
708 static void output(const bool &, void*, llvm::raw_ostream &);
709 static StringRef input(StringRef, void*, bool &);
710 static bool mustQuote(StringRef) { return false; }
714 struct ScalarTraits<StringRef> {
715 static void output(const StringRef &, void*, llvm::raw_ostream &);
716 static StringRef input(StringRef, void*, StringRef &);
717 static bool mustQuote(StringRef S) { return needsQuotes(S); }
721 struct ScalarTraits<std::string> {
722 static void output(const std::string &, void*, llvm::raw_ostream &);
723 static StringRef input(StringRef, void*, std::string &);
724 static bool mustQuote(StringRef S) { return needsQuotes(S); }
728 struct ScalarTraits<uint8_t> {
729 static void output(const uint8_t &, void*, llvm::raw_ostream &);
730 static StringRef input(StringRef, void*, uint8_t &);
731 static bool mustQuote(StringRef) { return false; }
735 struct ScalarTraits<uint16_t> {
736 static void output(const uint16_t &, void*, llvm::raw_ostream &);
737 static StringRef input(StringRef, void*, uint16_t &);
738 static bool mustQuote(StringRef) { return false; }
742 struct ScalarTraits<uint32_t> {
743 static void output(const uint32_t &, void*, llvm::raw_ostream &);
744 static StringRef input(StringRef, void*, uint32_t &);
745 static bool mustQuote(StringRef) { return false; }
749 struct ScalarTraits<uint64_t> {
750 static void output(const uint64_t &, void*, llvm::raw_ostream &);
751 static StringRef input(StringRef, void*, uint64_t &);
752 static bool mustQuote(StringRef) { return false; }
756 struct ScalarTraits<int8_t> {
757 static void output(const int8_t &, void*, llvm::raw_ostream &);
758 static StringRef input(StringRef, void*, int8_t &);
759 static bool mustQuote(StringRef) { return false; }
763 struct ScalarTraits<int16_t> {
764 static void output(const int16_t &, void*, llvm::raw_ostream &);
765 static StringRef input(StringRef, void*, int16_t &);
766 static bool mustQuote(StringRef) { return false; }
770 struct ScalarTraits<int32_t> {
771 static void output(const int32_t &, void*, llvm::raw_ostream &);
772 static StringRef input(StringRef, void*, int32_t &);
773 static bool mustQuote(StringRef) { return false; }
777 struct ScalarTraits<int64_t> {
778 static void output(const int64_t &, void*, llvm::raw_ostream &);
779 static StringRef input(StringRef, void*, int64_t &);
780 static bool mustQuote(StringRef) { return false; }
784 struct ScalarTraits<float> {
785 static void output(const float &, void*, llvm::raw_ostream &);
786 static StringRef input(StringRef, void*, float &);
787 static bool mustQuote(StringRef) { return false; }
791 struct ScalarTraits<double> {
792 static void output(const double &, void*, llvm::raw_ostream &);
793 static StringRef input(StringRef, void*, double &);
794 static bool mustQuote(StringRef) { return false; }
799 // Utility for use within MappingTraits<>::mapping() method
800 // to [de]normalize an object for use with YAML conversion.
801 template <typename TNorm, typename TFinal>
802 struct MappingNormalization {
803 MappingNormalization(IO &i_o, TFinal &Obj)
804 : io(i_o), BufPtr(nullptr), Result(Obj) {
805 if ( io.outputting() ) {
806 BufPtr = new (&Buffer) TNorm(io, Obj);
809 BufPtr = new (&Buffer) TNorm(io);
813 ~MappingNormalization() {
814 if ( ! io.outputting() ) {
815 Result = BufPtr->denormalize(io);
820 TNorm* operator->() { return BufPtr; }
823 typedef llvm::AlignedCharArrayUnion<TNorm> Storage;
833 // Utility for use within MappingTraits<>::mapping() method
834 // to [de]normalize an object for use with YAML conversion.
835 template <typename TNorm, typename TFinal>
836 struct MappingNormalizationHeap {
837 MappingNormalizationHeap(IO &i_o, TFinal &Obj)
838 : io(i_o), BufPtr(NULL), Result(Obj) {
839 if ( io.outputting() ) {
840 BufPtr = new (&Buffer) TNorm(io, Obj);
843 BufPtr = new TNorm(io);
847 ~MappingNormalizationHeap() {
848 if ( io.outputting() ) {
852 Result = BufPtr->denormalize(io);
856 TNorm* operator->() { return BufPtr; }
859 typedef llvm::AlignedCharArrayUnion<TNorm> Storage;
870 /// The Input class is used to parse a yaml document into in-memory structs
873 /// It works by using YAMLParser to do a syntax parse of the entire yaml
874 /// document, then the Input class builds a graph of HNodes which wraps
875 /// each yaml Node. The extra layer is buffering. The low level yaml
876 /// parser only lets you look at each node once. The buffering layer lets
877 /// you search and interate multiple times. This is necessary because
878 /// the mapRequired() method calls may not be in the same order
879 /// as the keys in the document.
881 class Input : public IO {
883 // Construct a yaml Input object from a StringRef and optional
884 // user-data. The DiagHandler can be specified to provide
885 // alternative error reporting.
886 Input(StringRef InputContent,
887 void *Ctxt = nullptr,
888 SourceMgr::DiagHandlerTy DiagHandler = nullptr,
889 void *DiagHandlerCtxt = nullptr);
892 // Check if there was an syntax or semantic error during parsing.
893 std::error_code error();
896 bool outputting() override;
897 bool mapTag(StringRef, bool) override;
898 void beginMapping() override;
899 void endMapping() override;
900 bool preflightKey(const char *, bool, bool, bool &, void *&) override;
901 void postflightKey(void *) override;
902 unsigned beginSequence() override;
903 void endSequence() override;
904 bool preflightElement(unsigned index, void *&) override;
905 void postflightElement(void *) override;
906 unsigned beginFlowSequence() override;
907 bool preflightFlowElement(unsigned , void *&) override;
908 void postflightFlowElement(void *) override;
909 void endFlowSequence() override;
910 void beginEnumScalar() override;
911 bool matchEnumScalar(const char*, bool) override;
912 bool matchEnumFallback() override;
913 void endEnumScalar() override;
914 bool beginBitSetScalar(bool &) override;
915 bool bitSetMatch(const char *, bool ) override;
916 void endBitSetScalar() override;
917 void scalarString(StringRef &, bool) override;
918 void setError(const Twine &message) override;
919 bool canElideEmptySequence() override;
922 virtual void anchor();
924 HNode(Node *n) : _node(n) { }
926 static inline bool classof(const HNode *) { return true; }
931 class EmptyHNode : public HNode {
932 void anchor() override;
934 EmptyHNode(Node *n) : HNode(n) { }
935 static inline bool classof(const HNode *n) {
936 return NullNode::classof(n->_node);
938 static inline bool classof(const EmptyHNode *) { return true; }
941 class ScalarHNode : public HNode {
942 void anchor() override;
944 ScalarHNode(Node *n, StringRef s) : HNode(n), _value(s) { }
946 StringRef value() const { return _value; }
948 static inline bool classof(const HNode *n) {
949 return ScalarNode::classof(n->_node);
951 static inline bool classof(const ScalarHNode *) { return true; }
956 class MapHNode : public HNode {
957 virtual void anchor();
960 MapHNode(Node *n) : HNode(n) { }
962 static inline bool classof(const HNode *n) {
963 return MappingNode::classof(n->_node);
965 static inline bool classof(const MapHNode *) { return true; }
967 typedef llvm::StringMap<std::unique_ptr<HNode>> NameToNode;
969 bool isValidKey(StringRef key);
972 llvm::SmallVector<const char*, 6> ValidKeys;
975 class SequenceHNode : public HNode {
976 virtual void anchor();
979 SequenceHNode(Node *n) : HNode(n) { }
981 static inline bool classof(const HNode *n) {
982 return SequenceNode::classof(n->_node);
984 static inline bool classof(const SequenceHNode *) { return true; }
986 std::vector<std::unique_ptr<HNode>> Entries;
989 std::unique_ptr<Input::HNode> createHNodes(Node *node);
990 void setError(HNode *hnode, const Twine &message);
991 void setError(Node *node, const Twine &message);
995 // These are only used by operator>>. They could be private
996 // if those templated things could be made friends.
997 bool setCurrentDocument();
1001 llvm::SourceMgr SrcMgr; // must be before Strm
1002 std::unique_ptr<llvm::yaml::Stream> Strm;
1003 std::unique_ptr<HNode> TopNode;
1005 llvm::BumpPtrAllocator StringAllocator;
1006 llvm::yaml::document_iterator DocIterator;
1007 std::vector<bool> BitValuesUsed;
1009 bool ScalarMatchFound;
1016 /// The Output class is used to generate a yaml document from in-memory structs
1019 class Output : public IO {
1021 Output(llvm::raw_ostream &, void *Ctxt=nullptr);
1024 bool outputting() override;
1025 bool mapTag(StringRef, bool) override;
1026 void beginMapping() override;
1027 void endMapping() override;
1028 bool preflightKey(const char *key, bool, bool, bool &, void *&) override;
1029 void postflightKey(void *) override;
1030 unsigned beginSequence() override;
1031 void endSequence() override;
1032 bool preflightElement(unsigned, void *&) override;
1033 void postflightElement(void *) override;
1034 unsigned beginFlowSequence() override;
1035 bool preflightFlowElement(unsigned, void *&) override;
1036 void postflightFlowElement(void *) override;
1037 void endFlowSequence() override;
1038 void beginEnumScalar() override;
1039 bool matchEnumScalar(const char*, bool) override;
1040 bool matchEnumFallback() override;
1041 void endEnumScalar() override;
1042 bool beginBitSetScalar(bool &) override;
1043 bool bitSetMatch(const char *, bool ) override;
1044 void endBitSetScalar() override;
1045 void scalarString(StringRef &, bool) override;
1046 void setError(const Twine &message) override;
1047 bool canElideEmptySequence() override;
1049 // These are only used by operator<<. They could be private
1050 // if that templated operator could be made a friend.
1051 void beginDocuments();
1052 bool preflightDocument(unsigned);
1053 void postflightDocument();
1054 void endDocuments();
1057 void output(StringRef s);
1058 void outputUpToEndOfLine(StringRef s);
1059 void newLineCheck();
1060 void outputNewLine();
1061 void paddedKey(StringRef key);
1063 enum InState { inSeq, inFlowSeq, inMapFirstKey, inMapOtherKey };
1065 llvm::raw_ostream &Out;
1066 SmallVector<InState, 8> StateStack;
1068 int ColumnAtFlowStart;
1069 bool NeedBitValueComma;
1070 bool NeedFlowSequenceComma;
1071 bool EnumerationMatchFound;
1078 /// YAML I/O does conversion based on types. But often native data types
1079 /// are just a typedef of built in intergral types (e.g. int). But the C++
1080 /// type matching system sees through the typedef and all the typedefed types
1081 /// look like a built in type. This will cause the generic YAML I/O conversion
1082 /// to be used. To provide better control over the YAML conversion, you can
1083 /// use this macro instead of typedef. It will create a class with one field
1084 /// and automatic conversion operators to and from the base type.
1085 /// Based on BOOST_STRONG_TYPEDEF
1086 #define LLVM_YAML_STRONG_TYPEDEF(_base, _type) \
1089 _type(const _base v) : value(v) { } \
1090 _type(const _type &v) : value(v.value) {} \
1091 _type &operator=(const _type &rhs) { value = rhs.value; return *this; }\
1092 _type &operator=(const _base &rhs) { value = rhs; return *this; } \
1093 operator const _base & () const { return value; } \
1094 bool operator==(const _type &rhs) const { return value == rhs.value; } \
1095 bool operator==(const _base &rhs) const { return value == rhs; } \
1096 bool operator<(const _type &rhs) const { return value < rhs.value; } \
1103 /// Use these types instead of uintXX_t in any mapping to have
1104 /// its yaml output formatted as hexadecimal.
1106 LLVM_YAML_STRONG_TYPEDEF(uint8_t, Hex8)
1107 LLVM_YAML_STRONG_TYPEDEF(uint16_t, Hex16)
1108 LLVM_YAML_STRONG_TYPEDEF(uint32_t, Hex32)
1109 LLVM_YAML_STRONG_TYPEDEF(uint64_t, Hex64)
1113 struct ScalarTraits<Hex8> {
1114 static void output(const Hex8 &, void*, llvm::raw_ostream &);
1115 static StringRef input(StringRef, void*, Hex8 &);
1116 static bool mustQuote(StringRef) { return false; }
1120 struct ScalarTraits<Hex16> {
1121 static void output(const Hex16 &, void*, llvm::raw_ostream &);
1122 static StringRef input(StringRef, void*, Hex16 &);
1123 static bool mustQuote(StringRef) { return false; }
1127 struct ScalarTraits<Hex32> {
1128 static void output(const Hex32 &, void*, llvm::raw_ostream &);
1129 static StringRef input(StringRef, void*, Hex32 &);
1130 static bool mustQuote(StringRef) { return false; }
1134 struct ScalarTraits<Hex64> {
1135 static void output(const Hex64 &, void*, llvm::raw_ostream &);
1136 static StringRef input(StringRef, void*, Hex64 &);
1137 static bool mustQuote(StringRef) { return false; }
1141 // Define non-member operator>> so that Input can stream in a document list.
1142 template <typename T>
1144 typename std::enable_if<has_DocumentListTraits<T>::value, Input &>::type
1145 operator>>(Input &yin, T &docList) {
1147 while ( yin.setCurrentDocument() ) {
1148 yamlize(yin, DocumentListTraits<T>::element(yin, docList, i), true);
1157 // Define non-member operator>> so that Input can stream in a map as a document.
1158 template <typename T>
1160 typename std::enable_if<has_MappingTraits<T>::value, Input &>::type
1161 operator>>(Input &yin, T &docMap) {
1162 yin.setCurrentDocument();
1163 yamlize(yin, docMap, true);
1167 // Define non-member operator>> so that Input can stream in a sequence as
1169 template <typename T>
1171 typename std::enable_if<has_SequenceTraits<T>::value, Input &>::type
1172 operator>>(Input &yin, T &docSeq) {
1173 if (yin.setCurrentDocument())
1174 yamlize(yin, docSeq, true);
1178 // Provide better error message about types missing a trait specialization
1179 template <typename T>
1181 typename std::enable_if<missingTraits<T>::value, Input &>::type
1182 operator>>(Input &yin, T &docSeq) {
1183 char missing_yaml_trait_for_type[sizeof(MissingTrait<T>)];
1188 // Define non-member operator<< so that Output can stream out document list.
1189 template <typename T>
1191 typename std::enable_if<has_DocumentListTraits<T>::value, Output &>::type
1192 operator<<(Output &yout, T &docList) {
1193 yout.beginDocuments();
1194 const size_t count = DocumentListTraits<T>::size(yout, docList);
1195 for(size_t i=0; i < count; ++i) {
1196 if ( yout.preflightDocument(i) ) {
1197 yamlize(yout, DocumentListTraits<T>::element(yout, docList, i), true);
1198 yout.postflightDocument();
1201 yout.endDocuments();
1205 // Define non-member operator<< so that Output can stream out a map.
1206 template <typename T>
1208 typename std::enable_if<has_MappingTraits<T>::value, Output &>::type
1209 operator<<(Output &yout, T &map) {
1210 yout.beginDocuments();
1211 if ( yout.preflightDocument(0) ) {
1212 yamlize(yout, map, true);
1213 yout.postflightDocument();
1215 yout.endDocuments();
1219 // Define non-member operator<< so that Output can stream out a sequence.
1220 template <typename T>
1222 typename std::enable_if<has_SequenceTraits<T>::value, Output &>::type
1223 operator<<(Output &yout, T &seq) {
1224 yout.beginDocuments();
1225 if ( yout.preflightDocument(0) ) {
1226 yamlize(yout, seq, true);
1227 yout.postflightDocument();
1229 yout.endDocuments();
1233 // Provide better error message about types missing a trait specialization
1234 template <typename T>
1236 typename std::enable_if<missingTraits<T>::value, Output &>::type
1237 operator<<(Output &yout, T &seq) {
1238 char missing_yaml_trait_for_type[sizeof(MissingTrait<T>)];
1247 /// Utility for declaring that a std::vector of a particular type
1248 /// should be considered a YAML sequence.
1249 #define LLVM_YAML_IS_SEQUENCE_VECTOR(_type) \
1253 struct SequenceTraits< std::vector<_type> > { \
1254 static size_t size(IO &io, std::vector<_type> &seq) { \
1255 return seq.size(); \
1257 static _type& element(IO &io, std::vector<_type> &seq, size_t index) {\
1258 if ( index >= seq.size() ) \
1259 seq.resize(index+1); \
1260 return seq[index]; \
1266 /// Utility for declaring that a std::vector of a particular type
1267 /// should be considered a YAML flow sequence.
1268 #define LLVM_YAML_IS_FLOW_SEQUENCE_VECTOR(_type) \
1272 struct SequenceTraits< std::vector<_type> > { \
1273 static size_t size(IO &io, std::vector<_type> &seq) { \
1274 return seq.size(); \
1276 static _type& element(IO &io, std::vector<_type> &seq, size_t index) {\
1277 (void)flow; /* Remove this workaround after PR17897 is fixed */ \
1278 if ( index >= seq.size() ) \
1279 seq.resize(index+1); \
1280 return seq[index]; \
1282 static const bool flow = true; \
1287 /// Utility for declaring that a std::vector of a particular type
1288 /// should be considered a YAML document list.
1289 #define LLVM_YAML_IS_DOCUMENT_LIST_VECTOR(_type) \
1293 struct DocumentListTraits< std::vector<_type> > { \
1294 static size_t size(IO &io, std::vector<_type> &seq) { \
1295 return seq.size(); \
1297 static _type& element(IO &io, std::vector<_type> &seq, size_t index) {\
1298 if ( index >= seq.size() ) \
1299 seq.resize(index+1); \
1300 return seq[index]; \
1308 #endif // LLVM_SUPPORT_YAMLTRAITS_H