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
13 #include "llvm/ADT/Optional.h"
14 #include "llvm/ADT/SmallVector.h"
15 #include "llvm/ADT/StringExtras.h"
16 #include "llvm/ADT/StringMap.h"
17 #include "llvm/ADT/StringRef.h"
18 #include "llvm/ADT/Twine.h"
19 #include "llvm/Support/AlignOf.h"
20 #include "llvm/Support/Allocator.h"
21 #include "llvm/Support/Endian.h"
22 #include "llvm/Support/Regex.h"
23 #include "llvm/Support/SourceMgr.h"
24 #include "llvm/Support/YAMLParser.h"
25 #include "llvm/Support/raw_ostream.h"
34 #include <system_error>
35 #include <type_traits>
41 struct EmptyContext {};
43 /// This class should be specialized by any type that needs to be converted
44 /// to/from a YAML mapping. For example:
46 /// struct MappingTraits<MyStruct> {
47 /// static void mapping(IO &io, MyStruct &s) {
48 /// io.mapRequired("name", s.name);
49 /// io.mapRequired("size", s.size);
50 /// io.mapOptional("age", s.age);
54 struct MappingTraits {
56 // static void mapping(IO &io, T &fields);
57 // Optionally may provide:
58 // static StringRef validate(IO &io, T &fields);
60 // The optional flow flag will cause generated YAML to use a flow mapping
61 // (e.g. { a: 0, b: 1 }):
62 // static const bool flow = true;
65 /// This class is similar to MappingTraits<T> but allows you to pass in
66 /// additional context for each map operation. For example:
68 /// struct MappingContextTraits<MyStruct, MyContext> {
69 /// static void mapping(IO &io, MyStruct &s, MyContext &c) {
70 /// io.mapRequired("name", s.name);
71 /// io.mapRequired("size", s.size);
72 /// io.mapOptional("age", s.age);
76 template <class T, class Context> struct MappingContextTraits {
78 // static void mapping(IO &io, T &fields, Context &Ctx);
79 // Optionally may provide:
80 // static StringRef validate(IO &io, T &fields, Context &Ctx);
82 // The optional flow flag will cause generated YAML to use a flow mapping
83 // (e.g. { a: 0, b: 1 }):
84 // static const bool flow = true;
87 /// This class should be specialized by any integral type that converts
88 /// to/from a YAML scalar where there is a one-to-one mapping between
89 /// in-memory values and a string in YAML. For example:
91 /// struct ScalarEnumerationTraits<Colors> {
92 /// static void enumeration(IO &io, Colors &value) {
93 /// io.enumCase(value, "red", cRed);
94 /// io.enumCase(value, "blue", cBlue);
95 /// io.enumCase(value, "green", cGreen);
99 struct ScalarEnumerationTraits {
101 // static void enumeration(IO &io, T &value);
104 /// This class should be specialized by any integer type that is a union
105 /// of bit values and the YAML representation is a flow sequence of
106 /// strings. For example:
108 /// struct ScalarBitSetTraits<MyFlags> {
109 /// static void bitset(IO &io, MyFlags &value) {
110 /// io.bitSetCase(value, "big", flagBig);
111 /// io.bitSetCase(value, "flat", flagFlat);
112 /// io.bitSetCase(value, "round", flagRound);
116 struct ScalarBitSetTraits {
118 // static void bitset(IO &io, T &value);
121 /// Describe which type of quotes should be used when quoting is necessary.
122 /// Some non-printable characters need to be double-quoted, while some others
123 /// are fine with simple-quoting, and some don't need any quoting.
124 enum class QuotingType { None, Single, Double };
126 /// This class should be specialized by type that requires custom conversion
127 /// to/from a yaml scalar. For example:
130 /// struct ScalarTraits<MyType> {
131 /// static void output(const MyType &val, void*, llvm::raw_ostream &out) {
132 /// // stream out custom formatting
133 /// out << llvm::format("%x", val);
135 /// static StringRef input(StringRef scalar, void*, MyType &value) {
136 /// // parse scalar and set `value`
137 /// // return empty string on success, or error string
138 /// return StringRef();
140 /// static QuotingType mustQuote(StringRef) { return QuotingType::Single; }
143 struct ScalarTraits {
146 // Function to write the value as a string:
147 //static void output(const T &value, void *ctxt, llvm::raw_ostream &out);
149 // Function to convert a string to a value. Returns the empty
150 // StringRef on success or an error string if string is malformed:
151 //static StringRef input(StringRef scalar, void *ctxt, T &value);
153 // Function to determine if the value should be quoted.
154 //static QuotingType mustQuote(StringRef);
157 /// This class should be specialized by type that requires custom conversion
158 /// to/from a YAML literal block scalar. For example:
161 /// struct BlockScalarTraits<MyType> {
162 /// static void output(const MyType &Value, void*, llvm::raw_ostream &Out)
164 /// // stream out custom formatting
167 /// static StringRef input(StringRef Scalar, void*, MyType &Value) {
168 /// // parse scalar and set `value`
169 /// // return empty string on success, or error string
170 /// return StringRef();
173 template <typename T>
174 struct BlockScalarTraits {
177 // Function to write the value as a string:
178 // static void output(const T &Value, void *ctx, llvm::raw_ostream &Out);
180 // Function to convert a string to a value. Returns the empty
181 // StringRef on success or an error string if string is malformed:
182 // static StringRef input(StringRef Scalar, void *ctxt, T &Value);
185 /// This class should be specialized by any type that needs to be converted
186 /// to/from a YAML sequence. For example:
189 /// struct SequenceTraits<MyContainer> {
190 /// static size_t size(IO &io, MyContainer &seq) {
191 /// return seq.size();
193 /// static MyType& element(IO &, MyContainer &seq, size_t index) {
194 /// if ( index >= seq.size() )
195 /// seq.resize(index+1);
196 /// return seq[index];
199 template<typename T, typename EnableIf = void>
200 struct SequenceTraits {
202 // static size_t size(IO &io, T &seq);
203 // static T::value_type& element(IO &io, T &seq, size_t index);
205 // The following is option and will cause generated YAML to use
206 // a flow sequence (e.g. [a,b,c]).
207 // static const bool flow = true;
210 /// This class should be specialized by any type for which vectors of that
211 /// type need to be converted to/from a YAML sequence.
212 template<typename T, typename EnableIf = void>
213 struct SequenceElementTraits {
215 // static const bool flow;
218 /// This class should be specialized by any type that needs to be converted
219 /// to/from a list of YAML documents.
221 struct DocumentListTraits {
223 // static size_t size(IO &io, T &seq);
224 // static T::value_type& element(IO &io, T &seq, size_t index);
227 /// This class should be specialized by any type that needs to be converted
228 /// to/from a YAML mapping in the case where the names of the keys are not known
229 /// in advance, e.g. a string map.
230 template <typename T>
231 struct CustomMappingTraits {
232 // static void inputOne(IO &io, StringRef key, T &elem);
233 // static void output(IO &io, T &elem);
236 // Only used for better diagnostics of missing traits
237 template <typename T>
240 // Test if ScalarEnumerationTraits<T> is defined on type T.
242 struct has_ScalarEnumerationTraits
244 using Signature_enumeration = void (*)(class IO&, T&);
246 template <typename U>
247 static char test(SameType<Signature_enumeration, &U::enumeration>*);
249 template <typename U>
250 static double test(...);
253 static bool const value =
254 (sizeof(test<ScalarEnumerationTraits<T>>(nullptr)) == 1);
257 // Test if ScalarBitSetTraits<T> is defined on type T.
259 struct has_ScalarBitSetTraits
261 using Signature_bitset = void (*)(class IO&, T&);
263 template <typename U>
264 static char test(SameType<Signature_bitset, &U::bitset>*);
266 template <typename U>
267 static double test(...);
270 static bool const value = (sizeof(test<ScalarBitSetTraits<T>>(nullptr)) == 1);
273 // Test if ScalarTraits<T> is defined on type T.
275 struct has_ScalarTraits
277 using Signature_input = StringRef (*)(StringRef, void*, T&);
278 using Signature_output = void (*)(const T&, void*, raw_ostream&);
279 using Signature_mustQuote = QuotingType (*)(StringRef);
281 template <typename U>
282 static char test(SameType<Signature_input, &U::input> *,
283 SameType<Signature_output, &U::output> *,
284 SameType<Signature_mustQuote, &U::mustQuote> *);
286 template <typename U>
287 static double test(...);
290 static bool const value =
291 (sizeof(test<ScalarTraits<T>>(nullptr, nullptr, nullptr)) == 1);
294 // Test if BlockScalarTraits<T> is defined on type T.
296 struct has_BlockScalarTraits
298 using Signature_input = StringRef (*)(StringRef, void *, T &);
299 using Signature_output = void (*)(const T &, void *, raw_ostream &);
301 template <typename U>
302 static char test(SameType<Signature_input, &U::input> *,
303 SameType<Signature_output, &U::output> *);
305 template <typename U>
306 static double test(...);
309 static bool const value =
310 (sizeof(test<BlockScalarTraits<T>>(nullptr, nullptr)) == 1);
313 // Test if MappingContextTraits<T> is defined on type T.
314 template <class T, class Context> struct has_MappingTraits {
315 using Signature_mapping = void (*)(class IO &, T &, Context &);
317 template <typename U>
318 static char test(SameType<Signature_mapping, &U::mapping>*);
320 template <typename U>
321 static double test(...);
324 static bool const value =
325 (sizeof(test<MappingContextTraits<T, Context>>(nullptr)) == 1);
328 // Test if MappingTraits<T> is defined on type T.
329 template <class T> struct has_MappingTraits<T, EmptyContext> {
330 using Signature_mapping = void (*)(class IO &, T &);
332 template <typename U>
333 static char test(SameType<Signature_mapping, &U::mapping> *);
335 template <typename U> static double test(...);
338 static bool const value = (sizeof(test<MappingTraits<T>>(nullptr)) == 1);
341 // Test if MappingContextTraits<T>::validate() is defined on type T.
342 template <class T, class Context> struct has_MappingValidateTraits {
343 using Signature_validate = StringRef (*)(class IO &, T &, Context &);
345 template <typename U>
346 static char test(SameType<Signature_validate, &U::validate>*);
348 template <typename U>
349 static double test(...);
352 static bool const value =
353 (sizeof(test<MappingContextTraits<T, Context>>(nullptr)) == 1);
356 // Test if MappingTraits<T>::validate() is defined on type T.
357 template <class T> struct has_MappingValidateTraits<T, EmptyContext> {
358 using Signature_validate = StringRef (*)(class IO &, T &);
360 template <typename U>
361 static char test(SameType<Signature_validate, &U::validate> *);
363 template <typename U> static double test(...);
366 static bool const value = (sizeof(test<MappingTraits<T>>(nullptr)) == 1);
369 // Test if SequenceTraits<T> is defined on type T.
371 struct has_SequenceMethodTraits
373 using Signature_size = size_t (*)(class IO&, T&);
375 template <typename U>
376 static char test(SameType<Signature_size, &U::size>*);
378 template <typename U>
379 static double test(...);
382 static bool const value = (sizeof(test<SequenceTraits<T>>(nullptr)) == 1);
385 // Test if CustomMappingTraits<T> is defined on type T.
387 struct has_CustomMappingTraits
389 using Signature_input = void (*)(IO &io, StringRef key, T &v);
391 template <typename U>
392 static char test(SameType<Signature_input, &U::inputOne>*);
394 template <typename U>
395 static double test(...);
398 static bool const value =
399 (sizeof(test<CustomMappingTraits<T>>(nullptr)) == 1);
402 // has_FlowTraits<int> will cause an error with some compilers because
403 // it subclasses int. Using this wrapper only instantiates the
404 // real has_FlowTraits only if the template type is a class.
405 template <typename T, bool Enabled = std::is_class<T>::value>
409 static const bool value = false;
412 // Some older gcc compilers don't support straight forward tests
413 // for members, so test for ambiguity cause by the base and derived
414 // classes both defining the member.
416 struct has_FlowTraits<T, true>
418 struct Fallback { bool flow; };
419 struct Derived : T, Fallback { };
422 static char (&f(SameType<bool Fallback::*, &C::flow>*))[1];
425 static char (&f(...))[2];
428 static bool const value = sizeof(f<Derived>(nullptr)) == 2;
431 // Test if SequenceTraits<T> is defined on type T
433 struct has_SequenceTraits : public std::integral_constant<bool,
434 has_SequenceMethodTraits<T>::value > { };
436 // Test if DocumentListTraits<T> is defined on type T
438 struct has_DocumentListTraits
440 using Signature_size = size_t (*)(class IO &, T &);
442 template <typename U>
443 static char test(SameType<Signature_size, &U::size>*);
445 template <typename U>
446 static double test(...);
449 static bool const value = (sizeof(test<DocumentListTraits<T>>(nullptr))==1);
452 inline bool isNumber(StringRef S) {
453 static const char OctalChars[] = "01234567";
454 if (S.startswith("0") &&
455 S.drop_front().find_first_not_of(OctalChars) == StringRef::npos)
458 if (S.startswith("0o") &&
459 S.drop_front(2).find_first_not_of(OctalChars) == StringRef::npos)
462 static const char HexChars[] = "0123456789abcdefABCDEF";
463 if (S.startswith("0x") &&
464 S.drop_front(2).find_first_not_of(HexChars) == StringRef::npos)
467 static const char DecChars[] = "0123456789";
468 if (S.find_first_not_of(DecChars) == StringRef::npos)
471 if (S.equals(".inf") || S.equals(".Inf") || S.equals(".INF"))
474 Regex FloatMatcher("^(\\.[0-9]+|[0-9]+(\\.[0-9]*)?)([eE][-+]?[0-9]+)?$");
475 if (FloatMatcher.match(S))
481 inline bool isNumeric(StringRef S) {
482 if ((S.front() == '-' || S.front() == '+') && isNumber(S.drop_front()))
488 if (S.equals(".nan") || S.equals(".NaN") || S.equals(".NAN"))
494 inline bool isNull(StringRef S) {
495 return S.equals("null") || S.equals("Null") || S.equals("NULL") ||
499 inline bool isBool(StringRef S) {
500 return S.equals("true") || S.equals("True") || S.equals("TRUE") ||
501 S.equals("false") || S.equals("False") || S.equals("FALSE");
504 // 5.1. Character Set
505 // The allowed character range explicitly excludes the C0 control block #x0-#x1F
506 // (except for TAB #x9, LF #xA, and CR #xD which are allowed), DEL #x7F, the C1
507 // control block #x80-#x9F (except for NEL #x85 which is allowed), the surrogate
508 // block #xD800-#xDFFF, #xFFFE, and #xFFFF.
509 inline QuotingType needsQuotes(StringRef S) {
511 return QuotingType::Single;
512 if (isspace(S.front()) || isspace(S.back()))
513 return QuotingType::Single;
515 return QuotingType::Single;
517 return QuotingType::Single;
519 return QuotingType::Single;
522 // Plain scalars must not begin with most indicators, as this would cause
523 // ambiguity with other YAML constructs.
524 static constexpr char Indicators[] = R"(-?:\,[]{}#&*!|>'"%@`)";
525 if (S.find_first_of(Indicators) == 0)
526 return QuotingType::Single;
528 QuotingType MaxQuotingNeeded = QuotingType::None;
529 for (unsigned char C : S) {
535 // Safe scalar characters.
543 // TAB (0x9) is allowed in unquoted strings.
546 // LF(0xA) and CR(0xD) may delimit values and so require at least single
550 MaxQuotingNeeded = QuotingType::Single;
552 // DEL (0x7F) are excluded from the allowed character range.
554 return QuotingType::Double;
556 // C0 control block (0x0 - 0x1F) is excluded from the allowed character
559 return QuotingType::Double;
561 // Always double quote UTF-8.
563 return QuotingType::Double;
565 // The character is not safe, at least simple quoting needed.
566 MaxQuotingNeeded = QuotingType::Single;
571 return MaxQuotingNeeded;
574 template <typename T, typename Context>
576 : public std::integral_constant<bool,
577 !has_ScalarEnumerationTraits<T>::value &&
578 !has_ScalarBitSetTraits<T>::value &&
579 !has_ScalarTraits<T>::value &&
580 !has_BlockScalarTraits<T>::value &&
581 !has_MappingTraits<T, Context>::value &&
582 !has_SequenceTraits<T>::value &&
583 !has_CustomMappingTraits<T>::value &&
584 !has_DocumentListTraits<T>::value> {};
586 template <typename T, typename Context>
587 struct validatedMappingTraits
588 : public std::integral_constant<
589 bool, has_MappingTraits<T, Context>::value &&
590 has_MappingValidateTraits<T, Context>::value> {};
592 template <typename T, typename Context>
593 struct unvalidatedMappingTraits
594 : public std::integral_constant<
595 bool, has_MappingTraits<T, Context>::value &&
596 !has_MappingValidateTraits<T, Context>::value> {};
598 // Base class for Input and Output.
601 IO(void *Ctxt = nullptr);
604 virtual bool outputting() = 0;
606 virtual unsigned beginSequence() = 0;
607 virtual bool preflightElement(unsigned, void *&) = 0;
608 virtual void postflightElement(void*) = 0;
609 virtual void endSequence() = 0;
610 virtual bool canElideEmptySequence() = 0;
612 virtual unsigned beginFlowSequence() = 0;
613 virtual bool preflightFlowElement(unsigned, void *&) = 0;
614 virtual void postflightFlowElement(void*) = 0;
615 virtual void endFlowSequence() = 0;
617 virtual bool mapTag(StringRef Tag, bool Default=false) = 0;
618 virtual void beginMapping() = 0;
619 virtual void endMapping() = 0;
620 virtual bool preflightKey(const char*, bool, bool, bool &, void *&) = 0;
621 virtual void postflightKey(void*) = 0;
622 virtual std::vector<StringRef> keys() = 0;
624 virtual void beginFlowMapping() = 0;
625 virtual void endFlowMapping() = 0;
627 virtual void beginEnumScalar() = 0;
628 virtual bool matchEnumScalar(const char*, bool) = 0;
629 virtual bool matchEnumFallback() = 0;
630 virtual void endEnumScalar() = 0;
632 virtual bool beginBitSetScalar(bool &) = 0;
633 virtual bool bitSetMatch(const char*, bool) = 0;
634 virtual void endBitSetScalar() = 0;
636 virtual void scalarString(StringRef &, QuotingType) = 0;
637 virtual void blockScalarString(StringRef &) = 0;
639 virtual void setError(const Twine &) = 0;
641 template <typename T>
642 void enumCase(T &Val, const char* Str, const T ConstVal) {
643 if ( matchEnumScalar(Str, outputting() && Val == ConstVal) ) {
648 // allow anonymous enum values to be used with LLVM_YAML_STRONG_TYPEDEF
649 template <typename T>
650 void enumCase(T &Val, const char* Str, const uint32_t ConstVal) {
651 if ( matchEnumScalar(Str, outputting() && Val == static_cast<T>(ConstVal)) ) {
656 template <typename FBT, typename T>
657 void enumFallback(T &Val) {
658 if (matchEnumFallback()) {
659 EmptyContext Context;
660 // FIXME: Force integral conversion to allow strong typedefs to convert.
661 FBT Res = static_cast<typename FBT::BaseType>(Val);
662 yamlize(*this, Res, true, Context);
663 Val = static_cast<T>(static_cast<typename FBT::BaseType>(Res));
667 template <typename T>
668 void bitSetCase(T &Val, const char* Str, const T ConstVal) {
669 if ( bitSetMatch(Str, outputting() && (Val & ConstVal) == ConstVal) ) {
670 Val = static_cast<T>(Val | ConstVal);
674 // allow anonymous enum values to be used with LLVM_YAML_STRONG_TYPEDEF
675 template <typename T>
676 void bitSetCase(T &Val, const char* Str, const uint32_t ConstVal) {
677 if ( bitSetMatch(Str, outputting() && (Val & ConstVal) == ConstVal) ) {
678 Val = static_cast<T>(Val | ConstVal);
682 template <typename T>
683 void maskedBitSetCase(T &Val, const char *Str, T ConstVal, T Mask) {
684 if (bitSetMatch(Str, outputting() && (Val & Mask) == ConstVal))
685 Val = Val | ConstVal;
688 template <typename T>
689 void maskedBitSetCase(T &Val, const char *Str, uint32_t ConstVal,
691 if (bitSetMatch(Str, outputting() && (Val & Mask) == ConstVal))
692 Val = Val | ConstVal;
696 void setContext(void *);
698 template <typename T> void mapRequired(const char *Key, T &Val) {
700 this->processKey(Key, Val, true, Ctx);
703 template <typename T, typename Context>
704 void mapRequired(const char *Key, T &Val, Context &Ctx) {
705 this->processKey(Key, Val, true, Ctx);
708 template <typename T> void mapOptional(const char *Key, T &Val) {
710 mapOptionalWithContext(Key, Val, Ctx);
713 template <typename T>
714 void mapOptional(const char *Key, T &Val, const T &Default) {
716 mapOptionalWithContext(Key, Val, Default, Ctx);
719 template <typename T, typename Context>
720 typename std::enable_if<has_SequenceTraits<T>::value, void>::type
721 mapOptionalWithContext(const char *Key, T &Val, Context &Ctx) {
722 // omit key/value instead of outputting empty sequence
723 if (this->canElideEmptySequence() && !(Val.begin() != Val.end()))
725 this->processKey(Key, Val, false, Ctx);
728 template <typename T, typename Context>
729 void mapOptionalWithContext(const char *Key, Optional<T> &Val, Context &Ctx) {
730 this->processKeyWithDefault(Key, Val, Optional<T>(), /*Required=*/false,
734 template <typename T, typename Context>
735 typename std::enable_if<!has_SequenceTraits<T>::value, void>::type
736 mapOptionalWithContext(const char *Key, T &Val, Context &Ctx) {
737 this->processKey(Key, Val, false, Ctx);
740 template <typename T, typename Context>
741 void mapOptionalWithContext(const char *Key, T &Val, const T &Default,
743 this->processKeyWithDefault(Key, Val, Default, false, Ctx);
747 template <typename T, typename Context>
748 void processKeyWithDefault(const char *Key, Optional<T> &Val,
749 const Optional<T> &DefaultValue, bool Required,
751 assert(DefaultValue.hasValue() == false &&
752 "Optional<T> shouldn't have a value!");
754 bool UseDefault = true;
755 const bool sameAsDefault = outputting() && !Val.hasValue();
756 if (!outputting() && !Val.hasValue())
758 if (Val.hasValue() &&
759 this->preflightKey(Key, Required, sameAsDefault, UseDefault,
761 yamlize(*this, Val.getValue(), Required, Ctx);
762 this->postflightKey(SaveInfo);
769 template <typename T, typename Context>
770 void processKeyWithDefault(const char *Key, T &Val, const T &DefaultValue,
771 bool Required, Context &Ctx) {
774 const bool sameAsDefault = outputting() && Val == DefaultValue;
775 if ( this->preflightKey(Key, Required, sameAsDefault, UseDefault,
777 yamlize(*this, Val, Required, Ctx);
778 this->postflightKey(SaveInfo);
786 template <typename T, typename Context>
787 void processKey(const char *Key, T &Val, bool Required, Context &Ctx) {
790 if ( this->preflightKey(Key, Required, false, UseDefault, SaveInfo) ) {
791 yamlize(*this, Val, Required, Ctx);
792 this->postflightKey(SaveInfo);
802 template <typename T, typename Context>
803 void doMapping(IO &io, T &Val, Context &Ctx) {
804 MappingContextTraits<T, Context>::mapping(io, Val, Ctx);
807 template <typename T> void doMapping(IO &io, T &Val, EmptyContext &Ctx) {
808 MappingTraits<T>::mapping(io, Val);
811 } // end namespace detail
813 template <typename T>
814 typename std::enable_if<has_ScalarEnumerationTraits<T>::value, void>::type
815 yamlize(IO &io, T &Val, bool, EmptyContext &Ctx) {
816 io.beginEnumScalar();
817 ScalarEnumerationTraits<T>::enumeration(io, Val);
821 template <typename T>
822 typename std::enable_if<has_ScalarBitSetTraits<T>::value, void>::type
823 yamlize(IO &io, T &Val, bool, EmptyContext &Ctx) {
825 if ( io.beginBitSetScalar(DoClear) ) {
827 Val = static_cast<T>(0);
828 ScalarBitSetTraits<T>::bitset(io, Val);
829 io.endBitSetScalar();
833 template <typename T>
834 typename std::enable_if<has_ScalarTraits<T>::value, void>::type
835 yamlize(IO &io, T &Val, bool, EmptyContext &Ctx) {
836 if ( io.outputting() ) {
838 raw_string_ostream Buffer(Storage);
839 ScalarTraits<T>::output(Val, io.getContext(), Buffer);
840 StringRef Str = Buffer.str();
841 io.scalarString(Str, ScalarTraits<T>::mustQuote(Str));
845 io.scalarString(Str, ScalarTraits<T>::mustQuote(Str));
846 StringRef Result = ScalarTraits<T>::input(Str, io.getContext(), Val);
847 if ( !Result.empty() ) {
848 io.setError(Twine(Result));
853 template <typename T>
854 typename std::enable_if<has_BlockScalarTraits<T>::value, void>::type
855 yamlize(IO &YamlIO, T &Val, bool, EmptyContext &Ctx) {
856 if (YamlIO.outputting()) {
858 raw_string_ostream Buffer(Storage);
859 BlockScalarTraits<T>::output(Val, YamlIO.getContext(), Buffer);
860 StringRef Str = Buffer.str();
861 YamlIO.blockScalarString(Str);
864 YamlIO.blockScalarString(Str);
866 BlockScalarTraits<T>::input(Str, YamlIO.getContext(), Val);
868 YamlIO.setError(Twine(Result));
872 template <typename T, typename Context>
873 typename std::enable_if<validatedMappingTraits<T, Context>::value, void>::type
874 yamlize(IO &io, T &Val, bool, Context &Ctx) {
875 if (has_FlowTraits<MappingTraits<T>>::value)
876 io.beginFlowMapping();
879 if (io.outputting()) {
880 StringRef Err = MappingTraits<T>::validate(io, Val);
882 errs() << Err << "\n";
883 assert(Err.empty() && "invalid struct trying to be written as yaml");
886 detail::doMapping(io, Val, Ctx);
887 if (!io.outputting()) {
888 StringRef Err = MappingTraits<T>::validate(io, Val);
892 if (has_FlowTraits<MappingTraits<T>>::value)
898 template <typename T, typename Context>
899 typename std::enable_if<unvalidatedMappingTraits<T, Context>::value, void>::type
900 yamlize(IO &io, T &Val, bool, Context &Ctx) {
901 if (has_FlowTraits<MappingTraits<T>>::value) {
902 io.beginFlowMapping();
903 detail::doMapping(io, Val, Ctx);
907 detail::doMapping(io, Val, Ctx);
912 template <typename T>
913 typename std::enable_if<has_CustomMappingTraits<T>::value, void>::type
914 yamlize(IO &io, T &Val, bool, EmptyContext &Ctx) {
915 if ( io.outputting() ) {
917 CustomMappingTraits<T>::output(io, Val);
921 for (StringRef key : io.keys())
922 CustomMappingTraits<T>::inputOne(io, key, Val);
927 template <typename T>
928 typename std::enable_if<missingTraits<T, EmptyContext>::value, void>::type
929 yamlize(IO &io, T &Val, bool, EmptyContext &Ctx) {
930 char missing_yaml_trait_for_type[sizeof(MissingTrait<T>)];
933 template <typename T, typename Context>
934 typename std::enable_if<has_SequenceTraits<T>::value, void>::type
935 yamlize(IO &io, T &Seq, bool, Context &Ctx) {
936 if ( has_FlowTraits< SequenceTraits<T>>::value ) {
937 unsigned incnt = io.beginFlowSequence();
938 unsigned count = io.outputting() ? SequenceTraits<T>::size(io, Seq) : incnt;
939 for(unsigned i=0; i < count; ++i) {
941 if ( io.preflightFlowElement(i, SaveInfo) ) {
942 yamlize(io, SequenceTraits<T>::element(io, Seq, i), true, Ctx);
943 io.postflightFlowElement(SaveInfo);
946 io.endFlowSequence();
949 unsigned incnt = io.beginSequence();
950 unsigned count = io.outputting() ? SequenceTraits<T>::size(io, Seq) : incnt;
951 for(unsigned i=0; i < count; ++i) {
953 if ( io.preflightElement(i, SaveInfo) ) {
954 yamlize(io, SequenceTraits<T>::element(io, Seq, i), true, Ctx);
955 io.postflightElement(SaveInfo);
963 struct ScalarTraits<bool> {
964 static void output(const bool &, void* , raw_ostream &);
965 static StringRef input(StringRef, void *, bool &);
966 static QuotingType mustQuote(StringRef) { return QuotingType::None; }
970 struct ScalarTraits<StringRef> {
971 static void output(const StringRef &, void *, raw_ostream &);
972 static StringRef input(StringRef, void *, StringRef &);
973 static QuotingType mustQuote(StringRef S) { return needsQuotes(S); }
977 struct ScalarTraits<std::string> {
978 static void output(const std::string &, void *, raw_ostream &);
979 static StringRef input(StringRef, void *, std::string &);
980 static QuotingType mustQuote(StringRef S) { return needsQuotes(S); }
984 struct ScalarTraits<uint8_t> {
985 static void output(const uint8_t &, void *, raw_ostream &);
986 static StringRef input(StringRef, void *, uint8_t &);
987 static QuotingType mustQuote(StringRef) { return QuotingType::None; }
991 struct ScalarTraits<uint16_t> {
992 static void output(const uint16_t &, void *, raw_ostream &);
993 static StringRef input(StringRef, void *, uint16_t &);
994 static QuotingType mustQuote(StringRef) { return QuotingType::None; }
998 struct ScalarTraits<uint32_t> {
999 static void output(const uint32_t &, void *, raw_ostream &);
1000 static StringRef input(StringRef, void *, uint32_t &);
1001 static QuotingType mustQuote(StringRef) { return QuotingType::None; }
1005 struct ScalarTraits<uint64_t> {
1006 static void output(const uint64_t &, void *, raw_ostream &);
1007 static StringRef input(StringRef, void *, uint64_t &);
1008 static QuotingType mustQuote(StringRef) { return QuotingType::None; }
1012 struct ScalarTraits<int8_t> {
1013 static void output(const int8_t &, void *, raw_ostream &);
1014 static StringRef input(StringRef, void *, int8_t &);
1015 static QuotingType mustQuote(StringRef) { return QuotingType::None; }
1019 struct ScalarTraits<int16_t> {
1020 static void output(const int16_t &, void *, raw_ostream &);
1021 static StringRef input(StringRef, void *, int16_t &);
1022 static QuotingType mustQuote(StringRef) { return QuotingType::None; }
1026 struct ScalarTraits<int32_t> {
1027 static void output(const int32_t &, void *, raw_ostream &);
1028 static StringRef input(StringRef, void *, int32_t &);
1029 static QuotingType mustQuote(StringRef) { return QuotingType::None; }
1033 struct ScalarTraits<int64_t> {
1034 static void output(const int64_t &, void *, raw_ostream &);
1035 static StringRef input(StringRef, void *, int64_t &);
1036 static QuotingType mustQuote(StringRef) { return QuotingType::None; }
1040 struct ScalarTraits<float> {
1041 static void output(const float &, void *, raw_ostream &);
1042 static StringRef input(StringRef, void *, float &);
1043 static QuotingType mustQuote(StringRef) { return QuotingType::None; }
1047 struct ScalarTraits<double> {
1048 static void output(const double &, void *, raw_ostream &);
1049 static StringRef input(StringRef, void *, double &);
1050 static QuotingType mustQuote(StringRef) { return QuotingType::None; }
1053 // For endian types, we just use the existing ScalarTraits for the underlying
1054 // type. This way endian aware types are supported whenever a ScalarTraits
1055 // is defined for the underlying type.
1056 template <typename value_type, support::endianness endian, size_t alignment>
1057 struct ScalarTraits<support::detail::packed_endian_specific_integral<
1058 value_type, endian, alignment>> {
1060 support::detail::packed_endian_specific_integral<value_type, endian,
1063 static void output(const endian_type &E, void *Ctx, raw_ostream &Stream) {
1064 ScalarTraits<value_type>::output(static_cast<value_type>(E), Ctx, Stream);
1067 static StringRef input(StringRef Str, void *Ctx, endian_type &E) {
1069 auto R = ScalarTraits<value_type>::input(Str, Ctx, V);
1070 E = static_cast<endian_type>(V);
1074 static QuotingType mustQuote(StringRef Str) {
1075 return ScalarTraits<value_type>::mustQuote(Str);
1079 // Utility for use within MappingTraits<>::mapping() method
1080 // to [de]normalize an object for use with YAML conversion.
1081 template <typename TNorm, typename TFinal>
1082 struct MappingNormalization {
1083 MappingNormalization(IO &i_o, TFinal &Obj)
1084 : io(i_o), BufPtr(nullptr), Result(Obj) {
1085 if ( io.outputting() ) {
1086 BufPtr = new (&Buffer) TNorm(io, Obj);
1089 BufPtr = new (&Buffer) TNorm(io);
1093 ~MappingNormalization() {
1094 if ( ! io.outputting() ) {
1095 Result = BufPtr->denormalize(io);
1100 TNorm* operator->() { return BufPtr; }
1103 using Storage = AlignedCharArrayUnion<TNorm>;
1111 // Utility for use within MappingTraits<>::mapping() method
1112 // to [de]normalize an object for use with YAML conversion.
1113 template <typename TNorm, typename TFinal>
1114 struct MappingNormalizationHeap {
1115 MappingNormalizationHeap(IO &i_o, TFinal &Obj, BumpPtrAllocator *allocator)
1116 : io(i_o), Result(Obj) {
1117 if ( io.outputting() ) {
1118 BufPtr = new (&Buffer) TNorm(io, Obj);
1120 else if (allocator) {
1121 BufPtr = allocator->Allocate<TNorm>();
1122 new (BufPtr) TNorm(io);
1124 BufPtr = new TNorm(io);
1128 ~MappingNormalizationHeap() {
1129 if ( io.outputting() ) {
1133 Result = BufPtr->denormalize(io);
1137 TNorm* operator->() { return BufPtr; }
1140 using Storage = AlignedCharArrayUnion<TNorm>;
1144 TNorm *BufPtr = nullptr;
1149 /// The Input class is used to parse a yaml document into in-memory structs
1152 /// It works by using YAMLParser to do a syntax parse of the entire yaml
1153 /// document, then the Input class builds a graph of HNodes which wraps
1154 /// each yaml Node. The extra layer is buffering. The low level yaml
1155 /// parser only lets you look at each node once. The buffering layer lets
1156 /// you search and interate multiple times. This is necessary because
1157 /// the mapRequired() method calls may not be in the same order
1158 /// as the keys in the document.
1160 class Input : public IO {
1162 // Construct a yaml Input object from a StringRef and optional
1163 // user-data. The DiagHandler can be specified to provide
1164 // alternative error reporting.
1165 Input(StringRef InputContent,
1166 void *Ctxt = nullptr,
1167 SourceMgr::DiagHandlerTy DiagHandler = nullptr,
1168 void *DiagHandlerCtxt = nullptr);
1169 Input(MemoryBufferRef Input,
1170 void *Ctxt = nullptr,
1171 SourceMgr::DiagHandlerTy DiagHandler = nullptr,
1172 void *DiagHandlerCtxt = nullptr);
1175 // Check if there was an syntax or semantic error during parsing.
1176 std::error_code error();
1179 bool outputting() override;
1180 bool mapTag(StringRef, bool) override;
1181 void beginMapping() override;
1182 void endMapping() override;
1183 bool preflightKey(const char *, bool, bool, bool &, void *&) override;
1184 void postflightKey(void *) override;
1185 std::vector<StringRef> keys() override;
1186 void beginFlowMapping() override;
1187 void endFlowMapping() override;
1188 unsigned beginSequence() override;
1189 void endSequence() override;
1190 bool preflightElement(unsigned index, void *&) override;
1191 void postflightElement(void *) override;
1192 unsigned beginFlowSequence() override;
1193 bool preflightFlowElement(unsigned , void *&) override;
1194 void postflightFlowElement(void *) override;
1195 void endFlowSequence() override;
1196 void beginEnumScalar() override;
1197 bool matchEnumScalar(const char*, bool) override;
1198 bool matchEnumFallback() override;
1199 void endEnumScalar() override;
1200 bool beginBitSetScalar(bool &) override;
1201 bool bitSetMatch(const char *, bool ) override;
1202 void endBitSetScalar() override;
1203 void scalarString(StringRef &, QuotingType) override;
1204 void blockScalarString(StringRef &) override;
1205 void setError(const Twine &message) override;
1206 bool canElideEmptySequence() override;
1209 virtual void anchor();
1212 HNode(Node *n) : _node(n) { }
1213 virtual ~HNode() = default;
1215 static bool classof(const HNode *) { return true; }
1220 class EmptyHNode : public HNode {
1221 void anchor() override;
1224 EmptyHNode(Node *n) : HNode(n) { }
1226 static bool classof(const HNode *n) { return NullNode::classof(n->_node); }
1228 static bool classof(const EmptyHNode *) { return true; }
1231 class ScalarHNode : public HNode {
1232 void anchor() override;
1235 ScalarHNode(Node *n, StringRef s) : HNode(n), _value(s) { }
1237 StringRef value() const { return _value; }
1239 static bool classof(const HNode *n) {
1240 return ScalarNode::classof(n->_node) ||
1241 BlockScalarNode::classof(n->_node);
1244 static bool classof(const ScalarHNode *) { return true; }
1250 class MapHNode : public HNode {
1251 void anchor() override;
1254 MapHNode(Node *n) : HNode(n) { }
1256 static bool classof(const HNode *n) {
1257 return MappingNode::classof(n->_node);
1260 static bool classof(const MapHNode *) { return true; }
1262 using NameToNode = StringMap<std::unique_ptr<HNode>>;
1265 SmallVector<std::string, 6> ValidKeys;
1268 class SequenceHNode : public HNode {
1269 void anchor() override;
1272 SequenceHNode(Node *n) : HNode(n) { }
1274 static bool classof(const HNode *n) {
1275 return SequenceNode::classof(n->_node);
1278 static bool classof(const SequenceHNode *) { return true; }
1280 std::vector<std::unique_ptr<HNode>> Entries;
1283 std::unique_ptr<Input::HNode> createHNodes(Node *node);
1284 void setError(HNode *hnode, const Twine &message);
1285 void setError(Node *node, const Twine &message);
1288 // These are only used by operator>>. They could be private
1289 // if those templated things could be made friends.
1290 bool setCurrentDocument();
1291 bool nextDocument();
1293 /// Returns the current node that's being parsed by the YAML Parser.
1294 const Node *getCurrentNode() const;
1297 SourceMgr SrcMgr; // must be before Strm
1298 std::unique_ptr<llvm::yaml::Stream> Strm;
1299 std::unique_ptr<HNode> TopNode;
1301 BumpPtrAllocator StringAllocator;
1302 document_iterator DocIterator;
1303 std::vector<bool> BitValuesUsed;
1304 HNode *CurrentNode = nullptr;
1305 bool ScalarMatchFound;
1309 /// The Output class is used to generate a yaml document from in-memory structs
1312 class Output : public IO {
1314 Output(raw_ostream &, void *Ctxt = nullptr, int WrapColumn = 70);
1317 /// Set whether or not to output optional values which are equal
1318 /// to the default value. By default, when outputting if you attempt
1319 /// to write a value that is equal to the default, the value gets ignored.
1320 /// Sometimes, it is useful to be able to see these in the resulting YAML
1322 void setWriteDefaultValues(bool Write) { WriteDefaultValues = Write; }
1324 bool outputting() override;
1325 bool mapTag(StringRef, bool) override;
1326 void beginMapping() override;
1327 void endMapping() override;
1328 bool preflightKey(const char *key, bool, bool, bool &, void *&) override;
1329 void postflightKey(void *) override;
1330 std::vector<StringRef> keys() override;
1331 void beginFlowMapping() override;
1332 void endFlowMapping() override;
1333 unsigned beginSequence() override;
1334 void endSequence() override;
1335 bool preflightElement(unsigned, void *&) override;
1336 void postflightElement(void *) override;
1337 unsigned beginFlowSequence() override;
1338 bool preflightFlowElement(unsigned, void *&) override;
1339 void postflightFlowElement(void *) override;
1340 void endFlowSequence() override;
1341 void beginEnumScalar() override;
1342 bool matchEnumScalar(const char*, bool) override;
1343 bool matchEnumFallback() override;
1344 void endEnumScalar() override;
1345 bool beginBitSetScalar(bool &) override;
1346 bool bitSetMatch(const char *, bool ) override;
1347 void endBitSetScalar() override;
1348 void scalarString(StringRef &, QuotingType) override;
1349 void blockScalarString(StringRef &) override;
1350 void setError(const Twine &message) override;
1351 bool canElideEmptySequence() override;
1353 // These are only used by operator<<. They could be private
1354 // if that templated operator could be made a friend.
1355 void beginDocuments();
1356 bool preflightDocument(unsigned);
1357 void postflightDocument();
1358 void endDocuments();
1361 void output(StringRef s);
1362 void outputUpToEndOfLine(StringRef s);
1363 void newLineCheck();
1364 void outputNewLine();
1365 void paddedKey(StringRef key);
1366 void flowKey(StringRef Key);
1379 SmallVector<InState, 8> StateStack;
1381 int ColumnAtFlowStart = 0;
1382 int ColumnAtMapFlowStart = 0;
1383 bool NeedBitValueComma = false;
1384 bool NeedFlowSequenceComma = false;
1385 bool EnumerationMatchFound = false;
1386 bool NeedsNewLine = false;
1387 bool WriteDefaultValues = false;
1390 /// YAML I/O does conversion based on types. But often native data types
1391 /// are just a typedef of built in intergral types (e.g. int). But the C++
1392 /// type matching system sees through the typedef and all the typedefed types
1393 /// look like a built in type. This will cause the generic YAML I/O conversion
1394 /// to be used. To provide better control over the YAML conversion, you can
1395 /// use this macro instead of typedef. It will create a class with one field
1396 /// and automatic conversion operators to and from the base type.
1397 /// Based on BOOST_STRONG_TYPEDEF
1398 #define LLVM_YAML_STRONG_TYPEDEF(_base, _type) \
1400 _type() = default; \
1401 _type(const _base v) : value(v) {} \
1402 _type(const _type &v) = default; \
1403 _type &operator=(const _type &rhs) = default; \
1404 _type &operator=(const _base &rhs) { value = rhs; return *this; } \
1405 operator const _base & () const { return value; } \
1406 bool operator==(const _type &rhs) const { return value == rhs.value; } \
1407 bool operator==(const _base &rhs) const { return value == rhs; } \
1408 bool operator<(const _type &rhs) const { return value < rhs.value; } \
1410 using BaseType = _base; \
1414 /// Use these types instead of uintXX_t in any mapping to have
1415 /// its yaml output formatted as hexadecimal.
1417 LLVM_YAML_STRONG_TYPEDEF(uint8_t, Hex8)
1418 LLVM_YAML_STRONG_TYPEDEF(uint16_t, Hex16)
1419 LLVM_YAML_STRONG_TYPEDEF(uint32_t, Hex32)
1420 LLVM_YAML_STRONG_TYPEDEF(uint64_t, Hex64)
1423 struct ScalarTraits<Hex8> {
1424 static void output(const Hex8 &, void *, raw_ostream &);
1425 static StringRef input(StringRef, void *, Hex8 &);
1426 static QuotingType mustQuote(StringRef) { return QuotingType::None; }
1430 struct ScalarTraits<Hex16> {
1431 static void output(const Hex16 &, void *, raw_ostream &);
1432 static StringRef input(StringRef, void *, Hex16 &);
1433 static QuotingType mustQuote(StringRef) { return QuotingType::None; }
1437 struct ScalarTraits<Hex32> {
1438 static void output(const Hex32 &, void *, raw_ostream &);
1439 static StringRef input(StringRef, void *, Hex32 &);
1440 static QuotingType mustQuote(StringRef) { return QuotingType::None; }
1444 struct ScalarTraits<Hex64> {
1445 static void output(const Hex64 &, void *, raw_ostream &);
1446 static StringRef input(StringRef, void *, Hex64 &);
1447 static QuotingType mustQuote(StringRef) { return QuotingType::None; }
1450 // Define non-member operator>> so that Input can stream in a document list.
1451 template <typename T>
1453 typename std::enable_if<has_DocumentListTraits<T>::value, Input &>::type
1454 operator>>(Input &yin, T &docList) {
1457 while ( yin.setCurrentDocument() ) {
1458 yamlize(yin, DocumentListTraits<T>::element(yin, docList, i), true, Ctx);
1467 // Define non-member operator>> so that Input can stream in a map as a document.
1468 template <typename T>
1469 inline typename std::enable_if<has_MappingTraits<T, EmptyContext>::value,
1471 operator>>(Input &yin, T &docMap) {
1473 yin.setCurrentDocument();
1474 yamlize(yin, docMap, true, Ctx);
1478 // Define non-member operator>> so that Input can stream in a sequence as
1480 template <typename T>
1482 typename std::enable_if<has_SequenceTraits<T>::value, Input &>::type
1483 operator>>(Input &yin, T &docSeq) {
1485 if (yin.setCurrentDocument())
1486 yamlize(yin, docSeq, true, Ctx);
1490 // Define non-member operator>> so that Input can stream in a block scalar.
1491 template <typename T>
1493 typename std::enable_if<has_BlockScalarTraits<T>::value, Input &>::type
1494 operator>>(Input &In, T &Val) {
1496 if (In.setCurrentDocument())
1497 yamlize(In, Val, true, Ctx);
1501 // Define non-member operator>> so that Input can stream in a string map.
1502 template <typename T>
1504 typename std::enable_if<has_CustomMappingTraits<T>::value, Input &>::type
1505 operator>>(Input &In, T &Val) {
1507 if (In.setCurrentDocument())
1508 yamlize(In, Val, true, Ctx);
1512 // Provide better error message about types missing a trait specialization
1513 template <typename T>
1514 inline typename std::enable_if<missingTraits<T, EmptyContext>::value,
1516 operator>>(Input &yin, T &docSeq) {
1517 char missing_yaml_trait_for_type[sizeof(MissingTrait<T>)];
1521 // Define non-member operator<< so that Output can stream out document list.
1522 template <typename T>
1524 typename std::enable_if<has_DocumentListTraits<T>::value, Output &>::type
1525 operator<<(Output &yout, T &docList) {
1527 yout.beginDocuments();
1528 const size_t count = DocumentListTraits<T>::size(yout, docList);
1529 for(size_t i=0; i < count; ++i) {
1530 if ( yout.preflightDocument(i) ) {
1531 yamlize(yout, DocumentListTraits<T>::element(yout, docList, i), true,
1533 yout.postflightDocument();
1536 yout.endDocuments();
1540 // Define non-member operator<< so that Output can stream out a map.
1541 template <typename T>
1542 inline typename std::enable_if<has_MappingTraits<T, EmptyContext>::value,
1544 operator<<(Output &yout, T &map) {
1546 yout.beginDocuments();
1547 if ( yout.preflightDocument(0) ) {
1548 yamlize(yout, map, true, Ctx);
1549 yout.postflightDocument();
1551 yout.endDocuments();
1555 // Define non-member operator<< so that Output can stream out a sequence.
1556 template <typename T>
1558 typename std::enable_if<has_SequenceTraits<T>::value, Output &>::type
1559 operator<<(Output &yout, T &seq) {
1561 yout.beginDocuments();
1562 if ( yout.preflightDocument(0) ) {
1563 yamlize(yout, seq, true, Ctx);
1564 yout.postflightDocument();
1566 yout.endDocuments();
1570 // Define non-member operator<< so that Output can stream out a block scalar.
1571 template <typename T>
1573 typename std::enable_if<has_BlockScalarTraits<T>::value, Output &>::type
1574 operator<<(Output &Out, T &Val) {
1576 Out.beginDocuments();
1577 if (Out.preflightDocument(0)) {
1578 yamlize(Out, Val, true, Ctx);
1579 Out.postflightDocument();
1585 // Define non-member operator<< so that Output can stream out a string map.
1586 template <typename T>
1588 typename std::enable_if<has_CustomMappingTraits<T>::value, Output &>::type
1589 operator<<(Output &Out, T &Val) {
1591 Out.beginDocuments();
1592 if (Out.preflightDocument(0)) {
1593 yamlize(Out, Val, true, Ctx);
1594 Out.postflightDocument();
1600 // Provide better error message about types missing a trait specialization
1601 template <typename T>
1602 inline typename std::enable_if<missingTraits<T, EmptyContext>::value,
1604 operator<<(Output &yout, T &seq) {
1605 char missing_yaml_trait_for_type[sizeof(MissingTrait<T>)];
1609 template <bool B> struct IsFlowSequenceBase {};
1610 template <> struct IsFlowSequenceBase<true> { static const bool flow = true; };
1612 template <typename T, bool Flow>
1613 struct SequenceTraitsImpl : IsFlowSequenceBase<Flow> {
1615 using type = typename T::value_type;
1618 static size_t size(IO &io, T &seq) { return seq.size(); }
1620 static type &element(IO &io, T &seq, size_t index) {
1621 if (index >= seq.size())
1622 seq.resize(index + 1);
1627 // Simple helper to check an expression can be used as a bool-valued template
1629 template <bool> struct CheckIsBool { static const bool value = true; };
1631 // If T has SequenceElementTraits, then vector<T> and SmallVector<T, N> have
1632 // SequenceTraits that do the obvious thing.
1633 template <typename T>
1634 struct SequenceTraits<std::vector<T>,
1635 typename std::enable_if<CheckIsBool<
1636 SequenceElementTraits<T>::flow>::value>::type>
1637 : SequenceTraitsImpl<std::vector<T>, SequenceElementTraits<T>::flow> {};
1638 template <typename T, unsigned N>
1639 struct SequenceTraits<SmallVector<T, N>,
1640 typename std::enable_if<CheckIsBool<
1641 SequenceElementTraits<T>::flow>::value>::type>
1642 : SequenceTraitsImpl<SmallVector<T, N>, SequenceElementTraits<T>::flow> {};
1644 // Sequences of fundamental types use flow formatting.
1645 template <typename T>
1646 struct SequenceElementTraits<
1647 T, typename std::enable_if<std::is_fundamental<T>::value>::type> {
1648 static const bool flow = true;
1651 // Sequences of strings use block formatting.
1652 template<> struct SequenceElementTraits<std::string> {
1653 static const bool flow = false;
1655 template<> struct SequenceElementTraits<StringRef> {
1656 static const bool flow = false;
1658 template<> struct SequenceElementTraits<std::pair<std::string, std::string>> {
1659 static const bool flow = false;
1662 /// Implementation of CustomMappingTraits for std::map<std::string, T>.
1663 template <typename T> struct StdMapStringCustomMappingTraitsImpl {
1664 using map_type = std::map<std::string, T>;
1666 static void inputOne(IO &io, StringRef key, map_type &v) {
1667 io.mapRequired(key.str().c_str(), v[key]);
1670 static void output(IO &io, map_type &v) {
1672 io.mapRequired(p.first.c_str(), p.second);
1676 } // end namespace yaml
1677 } // end namespace llvm
1679 #define LLVM_YAML_IS_SEQUENCE_VECTOR_IMPL(TYPE, FLOW) \
1683 !std::is_fundamental<TYPE>::value && \
1684 !std::is_same<TYPE, std::string>::value && \
1685 !std::is_same<TYPE, llvm::StringRef>::value, \
1686 "only use LLVM_YAML_IS_SEQUENCE_VECTOR for types you control"); \
1687 template <> struct SequenceElementTraits<TYPE> { \
1688 static const bool flow = FLOW; \
1693 /// Utility for declaring that a std::vector of a particular type
1694 /// should be considered a YAML sequence.
1695 #define LLVM_YAML_IS_SEQUENCE_VECTOR(type) \
1696 LLVM_YAML_IS_SEQUENCE_VECTOR_IMPL(type, false)
1698 /// Utility for declaring that a std::vector of a particular type
1699 /// should be considered a YAML flow sequence.
1700 #define LLVM_YAML_IS_FLOW_SEQUENCE_VECTOR(type) \
1701 LLVM_YAML_IS_SEQUENCE_VECTOR_IMPL(type, true)
1703 #define LLVM_YAML_DECLARE_MAPPING_TRAITS(Type) \
1706 template <> struct MappingTraits<Type> { \
1707 static void mapping(IO &IO, Type &Obj); \
1712 #define LLVM_YAML_DECLARE_ENUM_TRAITS(Type) \
1715 template <> struct ScalarEnumerationTraits<Type> { \
1716 static void enumeration(IO &io, Type &Value); \
1721 #define LLVM_YAML_DECLARE_BITSET_TRAITS(Type) \
1724 template <> struct ScalarBitSetTraits<Type> { \
1725 static void bitset(IO &IO, Type &Options); \
1730 #define LLVM_YAML_DECLARE_SCALAR_TRAITS(Type, MustQuote) \
1733 template <> struct ScalarTraits<Type> { \
1734 static void output(const Type &Value, void *ctx, raw_ostream &Out); \
1735 static StringRef input(StringRef Scalar, void *ctxt, Type &Value); \
1736 static QuotingType mustQuote(StringRef) { return MustQuote; } \
1741 /// Utility for declaring that a std::vector of a particular type
1742 /// should be considered a YAML document list.
1743 #define LLVM_YAML_IS_DOCUMENT_LIST_VECTOR(_type) \
1746 template <unsigned N> \
1747 struct DocumentListTraits<SmallVector<_type, N>> \
1748 : public SequenceTraitsImpl<SmallVector<_type, N>, false> {}; \
1750 struct DocumentListTraits<std::vector<_type>> \
1751 : public SequenceTraitsImpl<std::vector<_type>, false> {}; \
1755 /// Utility for declaring that std::map<std::string, _type> should be considered
1757 #define LLVM_YAML_IS_STRING_MAP(_type) \
1761 struct CustomMappingTraits<std::map<std::string, _type>> \
1762 : public StdMapStringCustomMappingTraitsImpl<_type> {}; \
1766 #endif // LLVM_SUPPORT_YAMLTRAITS_H