clang-tools-extra/clang-doc/YAMLGenerator.cpp

   1 //===-- YAMLGenerator.cpp - ClangDoc YAML -----------------------*- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 // Implementation of the YAML generator, converting decl info into YAML output.
   9 //===----------------------------------------------------------------------===//
  10
  11 #include "Generators.h"
  12 #include "Representation.h"
  13 #include "llvm/Support/YAMLTraits.h"
  14 #include "llvm/Support/raw_ostream.h"
  15 #include <optional>
  16
  17 using namespace clang::doc;
  18
  19 // These define YAML traits for decoding the listed values within a vector.
  20 LLVM_YAML_IS_SEQUENCE_VECTOR(FieldTypeInfo)
  21 LLVM_YAML_IS_SEQUENCE_VECTOR(MemberTypeInfo)
  22 LLVM_YAML_IS_SEQUENCE_VECTOR(Reference)
  23 LLVM_YAML_IS_SEQUENCE_VECTOR(Location)
  24 LLVM_YAML_IS_SEQUENCE_VECTOR(CommentInfo)
  25 LLVM_YAML_IS_SEQUENCE_VECTOR(FunctionInfo)
  26 LLVM_YAML_IS_SEQUENCE_VECTOR(EnumInfo)
  27 LLVM_YAML_IS_SEQUENCE_VECTOR(EnumValueInfo)
  28 LLVM_YAML_IS_SEQUENCE_VECTOR(TemplateParamInfo)
  29 LLVM_YAML_IS_SEQUENCE_VECTOR(TypedefInfo)
  30 LLVM_YAML_IS_SEQUENCE_VECTOR(BaseRecordInfo)
  31 LLVM_YAML_IS_SEQUENCE_VECTOR(std::unique_ptr<CommentInfo>)
  32 LLVM_YAML_IS_SEQUENCE_VECTOR(llvm::SmallString<16>)
  33
  34 namespace llvm {
  35 namespace yaml {
  36
  37 // Enumerations to YAML output.
  38
  39 template <> struct ScalarEnumerationTraits<clang::AccessSpecifier> {
  40   static void enumeration(IO &IO, clang::AccessSpecifier &Value) {
  41     IO.enumCase(Value, "Public", clang::AccessSpecifier::AS_public);
  42     IO.enumCase(Value, "Protected", clang::AccessSpecifier::AS_protected);
  43     IO.enumCase(Value, "Private", clang::AccessSpecifier::AS_private);
  44     IO.enumCase(Value, "None", clang::AccessSpecifier::AS_none);
  45   }
  46 };
  47
  48 template <> struct ScalarEnumerationTraits<clang::TagTypeKind> {
  49   static void enumeration(IO &IO, clang::TagTypeKind &Value) {
  50     IO.enumCase(Value, "Struct", clang::TagTypeKind::Struct);
  51     IO.enumCase(Value, "Interface", clang::TagTypeKind::Interface);
  52     IO.enumCase(Value, "Union", clang::TagTypeKind::Union);
  53     IO.enumCase(Value, "Class", clang::TagTypeKind::Class);
  54     IO.enumCase(Value, "Enum", clang::TagTypeKind::Enum);
  55   }
  56 };
  57
  58 template <> struct ScalarEnumerationTraits<InfoType> {
  59   static void enumeration(IO &IO, InfoType &Value) {
  60     IO.enumCase(Value, "Namespace", InfoType::IT_namespace);
  61     IO.enumCase(Value, "Record", InfoType::IT_record);
  62     IO.enumCase(Value, "Function", InfoType::IT_function);
  63     IO.enumCase(Value, "Enum", InfoType::IT_enum);
  64     IO.enumCase(Value, "Default", InfoType::IT_default);
  65   }
  66 };
  67
  68 // Scalars to YAML output.
  69 template <unsigned U> struct ScalarTraits<SmallString<U>> {
  70
  71   static void output(const SmallString<U> &S, void *, llvm::raw_ostream &OS) {
  72     for (const auto &C : S)
  73       OS << C;
  74   }
  75
  76   static StringRef input(StringRef Scalar, void *, SmallString<U> &Value) {
  77     Value.assign(Scalar.begin(), Scalar.end());
  78     return StringRef();
  79   }
  80
  81   static QuotingType mustQuote(StringRef) { return QuotingType::Single; }
  82 };
  83
  84 template <> struct ScalarTraits<std::array<unsigned char, 20>> {
  85
  86   static void output(const std::array<unsigned char, 20> &S, void *,
  87                      llvm::raw_ostream &OS) {
  88     OS << toHex(toStringRef(S));
  89   }
  90
  91   static StringRef input(StringRef Scalar, void *,
  92                          std::array<unsigned char, 20> &Value) {
  93     if (Scalar.size() != 40)
  94       return "Error: Incorrect scalar size for USR.";
  95     Value = StringToSymbol(Scalar);
  96     return StringRef();
  97   }
  98
  99   static SymbolID StringToSymbol(llvm::StringRef Value) {
 100     SymbolID USR;
 101     std::string HexString = fromHex(Value);
 102     std::copy(HexString.begin(), HexString.end(), USR.begin());
 103     return SymbolID(USR);
 104   }
 105
 106   static QuotingType mustQuote(StringRef) { return QuotingType::Single; }
 107 };
 108
 109 // Helper functions to map infos to YAML.
 110
 111 static void TypeInfoMapping(IO &IO, TypeInfo &I) {
 112   IO.mapOptional("Type", I.Type, Reference());
 113 }
 114
 115 static void FieldTypeInfoMapping(IO &IO, FieldTypeInfo &I) {
 116   TypeInfoMapping(IO, I);
 117   IO.mapOptional("Name", I.Name, SmallString<16>());
 118   IO.mapOptional("DefaultValue", I.DefaultValue, SmallString<16>());
 119 }
 120
 121 static void InfoMapping(IO &IO, Info &I) {
 122   IO.mapRequired("USR", I.USR);
 123   IO.mapOptional("Name", I.Name, SmallString<16>());
 124   IO.mapOptional("Path", I.Path, SmallString<128>());
 125   IO.mapOptional("Namespace", I.Namespace, llvm::SmallVector<Reference, 4>());
 126   IO.mapOptional("Description", I.Description);
 127 }
 128
 129 static void SymbolInfoMapping(IO &IO, SymbolInfo &I) {
 130   InfoMapping(IO, I);
 131   IO.mapOptional("DefLocation", I.DefLoc, std::optional<Location>());
 132   IO.mapOptional("Location", I.Loc, llvm::SmallVector<Location, 2>());
 133 }
 134
 135 static void RecordInfoMapping(IO &IO, RecordInfo &I) {
 136   SymbolInfoMapping(IO, I);
 137   IO.mapOptional("TagType", I.TagType);
 138   IO.mapOptional("IsTypeDef", I.IsTypeDef, false);
 139   IO.mapOptional("Members", I.Members);
 140   IO.mapOptional("Bases", I.Bases);
 141   IO.mapOptional("Parents", I.Parents, llvm::SmallVector<Reference, 4>());
 142   IO.mapOptional("VirtualParents", I.VirtualParents,
 143                  llvm::SmallVector<Reference, 4>());
 144   IO.mapOptional("ChildRecords", I.Children.Records, std::vector<Reference>());
 145   IO.mapOptional("ChildFunctions", I.Children.Functions);
 146   IO.mapOptional("ChildEnums", I.Children.Enums);
 147   IO.mapOptional("ChildTypedefs", I.Children.Typedefs);
 148   IO.mapOptional("Template", I.Template);
 149 }
 150
 151 static void CommentInfoMapping(IO &IO, CommentInfo &I) {
 152   IO.mapOptional("Kind", I.Kind, SmallString<16>());
 153   IO.mapOptional("Text", I.Text, SmallString<64>());
 154   IO.mapOptional("Name", I.Name, SmallString<16>());
 155   IO.mapOptional("Direction", I.Direction, SmallString<8>());
 156   IO.mapOptional("ParamName", I.ParamName, SmallString<16>());
 157   IO.mapOptional("CloseName", I.CloseName, SmallString<16>());
 158   IO.mapOptional("SelfClosing", I.SelfClosing, false);
 159   IO.mapOptional("Explicit", I.Explicit, false);
 160   IO.mapOptional("Args", I.Args, llvm::SmallVector<SmallString<16>, 4>());
 161   IO.mapOptional("AttrKeys", I.AttrKeys,
 162                  llvm::SmallVector<SmallString<16>, 4>());
 163   IO.mapOptional("AttrValues", I.AttrValues,
 164                  llvm::SmallVector<SmallString<16>, 4>());
 165   IO.mapOptional("Children", I.Children);
 166 }
 167
 168 // Template specialization to YAML traits for Infos.
 169
 170 template <> struct MappingTraits<Location> {
 171   static void mapping(IO &IO, Location &Loc) {
 172     IO.mapOptional("LineNumber", Loc.LineNumber, 0);
 173     IO.mapOptional("Filename", Loc.Filename, SmallString<32>());
 174   }
 175 };
 176
 177 template <> struct MappingTraits<Reference> {
 178   static void mapping(IO &IO, Reference &Ref) {
 179     IO.mapOptional("Type", Ref.RefType, InfoType::IT_default);
 180     IO.mapOptional("Name", Ref.Name, SmallString<16>());
 181     IO.mapOptional("QualName", Ref.QualName, SmallString<16>());
 182     IO.mapOptional("USR", Ref.USR, SymbolID());
 183     IO.mapOptional("Path", Ref.Path, SmallString<128>());
 184   }
 185 };
 186
 187 template <> struct MappingTraits<TypeInfo> {
 188   static void mapping(IO &IO, TypeInfo &I) { TypeInfoMapping(IO, I); }
 189 };
 190
 191 template <> struct MappingTraits<FieldTypeInfo> {
 192   static void mapping(IO &IO, FieldTypeInfo &I) {
 193     TypeInfoMapping(IO, I);
 194     IO.mapOptional("Name", I.Name, SmallString<16>());
 195     IO.mapOptional("DefaultValue", I.DefaultValue, SmallString<16>());
 196   }
 197 };
 198
 199 template <> struct MappingTraits<MemberTypeInfo> {
 200   static void mapping(IO &IO, MemberTypeInfo &I) {
 201     FieldTypeInfoMapping(IO, I);
 202     // clang::AccessSpecifier::AS_none is used as the default here because it's
 203     // the AS that shouldn't be part of the output. Even though AS_public is the
 204     // default in the struct, it should be displayed in the YAML output.
 205     IO.mapOptional("Access", I.Access, clang::AccessSpecifier::AS_none);
 206     IO.mapOptional("Description", I.Description);
 207   }
 208 };
 209
 210 template <> struct MappingTraits<NamespaceInfo> {
 211   static void mapping(IO &IO, NamespaceInfo &I) {
 212     InfoMapping(IO, I);
 213     IO.mapOptional("ChildNamespaces", I.Children.Namespaces,
 214                    std::vector<Reference>());
 215     IO.mapOptional("ChildRecords", I.Children.Records,
 216                    std::vector<Reference>());
 217     IO.mapOptional("ChildFunctions", I.Children.Functions);
 218     IO.mapOptional("ChildEnums", I.Children.Enums);
 219     IO.mapOptional("ChildTypedefs", I.Children.Typedefs);
 220   }
 221 };
 222
 223 template <> struct MappingTraits<RecordInfo> {
 224   static void mapping(IO &IO, RecordInfo &I) { RecordInfoMapping(IO, I); }
 225 };
 226
 227 template <> struct MappingTraits<BaseRecordInfo> {
 228   static void mapping(IO &IO, BaseRecordInfo &I) {
 229     RecordInfoMapping(IO, I);
 230     IO.mapOptional("IsVirtual", I.IsVirtual, false);
 231     // clang::AccessSpecifier::AS_none is used as the default here because it's
 232     // the AS that shouldn't be part of the output. Even though AS_public is the
 233     // default in the struct, it should be displayed in the YAML output.
 234     IO.mapOptional("Access", I.Access, clang::AccessSpecifier::AS_none);
 235     IO.mapOptional("IsParent", I.IsParent, false);
 236   }
 237 };
 238
 239 template <> struct MappingTraits<EnumValueInfo> {
 240   static void mapping(IO &IO, EnumValueInfo &I) {
 241     IO.mapOptional("Name", I.Name);
 242     IO.mapOptional("Value", I.Value);
 243     IO.mapOptional("Expr", I.ValueExpr, SmallString<16>());
 244   }
 245 };
 246
 247 template <> struct MappingTraits<EnumInfo> {
 248   static void mapping(IO &IO, EnumInfo &I) {
 249     SymbolInfoMapping(IO, I);
 250     IO.mapOptional("Scoped", I.Scoped, false);
 251     IO.mapOptional("BaseType", I.BaseType);
 252     IO.mapOptional("Members", I.Members);
 253   }
 254 };
 255
 256 template <> struct MappingTraits<TypedefInfo> {
 257   static void mapping(IO &IO, TypedefInfo &I) {
 258     SymbolInfoMapping(IO, I);
 259     IO.mapOptional("Underlying", I.Underlying.Type);
 260     IO.mapOptional("IsUsing", I.IsUsing, false);
 261   }
 262 };
 263
 264 template <> struct MappingTraits<FunctionInfo> {
 265   static void mapping(IO &IO, FunctionInfo &I) {
 266     SymbolInfoMapping(IO, I);
 267     IO.mapOptional("IsMethod", I.IsMethod, false);
 268     IO.mapOptional("Parent", I.Parent, Reference());
 269     IO.mapOptional("Params", I.Params);
 270     IO.mapOptional("ReturnType", I.ReturnType);
 271     // clang::AccessSpecifier::AS_none is used as the default here because it's
 272     // the AS that shouldn't be part of the output. Even though AS_public is the
 273     // default in the struct, it should be displayed in the YAML output.
 274     IO.mapOptional("Access", I.Access, clang::AccessSpecifier::AS_none);
 275     IO.mapOptional("Template", I.Template);
 276   }
 277 };
 278
 279 template <> struct MappingTraits<TemplateParamInfo> {
 280   static void mapping(IO &IO, TemplateParamInfo &I) {
 281     IO.mapOptional("Contents", I.Contents);
 282   }
 283 };
 284
 285 template <> struct MappingTraits<TemplateSpecializationInfo> {
 286   static void mapping(IO &IO, TemplateSpecializationInfo &I) {
 287     IO.mapOptional("SpecializationOf", I.SpecializationOf);
 288     IO.mapOptional("Params", I.Params);
 289   }
 290 };
 291
 292 template <> struct MappingTraits<TemplateInfo> {
 293   static void mapping(IO &IO, TemplateInfo &I) {
 294     IO.mapOptional("Params", I.Params);
 295     IO.mapOptional("Specialization", I.Specialization,
 296                    std::optional<TemplateSpecializationInfo>());
 297   }
 298 };
 299
 300 template <> struct MappingTraits<CommentInfo> {
 301   static void mapping(IO &IO, CommentInfo &I) { CommentInfoMapping(IO, I); }
 302 };
 303
 304 template <> struct MappingTraits<std::unique_ptr<CommentInfo>> {
 305   static void mapping(IO &IO, std::unique_ptr<CommentInfo> &I) {
 306     if (I)
 307       CommentInfoMapping(IO, *I);
 308   }
 309 };
 310
 311 } // end namespace yaml
 312 } // end namespace llvm
 313
 314 namespace clang {
 315 namespace doc {
 316
 317 /// Generator for YAML documentation.
 318 class YAMLGenerator : public Generator {
 319 public:
 320   static const char *Format;
 321
 322   llvm::Error generateDocs(StringRef RootDir,
 323                            llvm::StringMap<std::unique_ptr<doc::Info>> Infos,
 324                            const ClangDocContext &CDCtx) override;
 325   llvm::Error generateDocForInfo(Info *I, llvm::raw_ostream &OS,
 326                                  const ClangDocContext &CDCtx) override;
 327 };
 328
 329 const char *YAMLGenerator::Format = "yaml";
 330
 331 llvm::Error
 332 YAMLGenerator::generateDocs(StringRef RootDir,
 333                             llvm::StringMap<std::unique_ptr<doc::Info>> Infos,
 334                             const ClangDocContext &CDCtx) {
 335   for (const auto &Group : Infos) {
 336     doc::Info *Info = Group.getValue().get();
 337
 338     // Output file names according to the USR except the global namesapce.
 339     // Anonymous namespaces are taken care of in serialization, so here we can
 340     // safely assume an unnamed namespace is the global one.
 341     llvm::SmallString<128> Path;
 342     llvm::sys::path::native(RootDir, Path);
 343     if (Info->IT == InfoType::IT_namespace && Info->Name.empty()) {
 344       llvm::sys::path::append(Path, "index.yaml");
 345     } else {
 346       llvm::sys::path::append(Path, Group.getKey() + ".yaml");
 347     }
 348
 349     std::error_code FileErr;
 350     llvm::raw_fd_ostream InfoOS(Path, FileErr, llvm::sys::fs::OF_None);
 351     if (FileErr) {
 352       return llvm::createStringError(FileErr, "Error opening file '%s'",
 353                                      Path.c_str());
 354     }
 355
 356     if (llvm::Error Err = generateDocForInfo(Info, InfoOS, CDCtx)) {
 357       return Err;
 358     }
 359   }
 360
 361   return llvm::Error::success();
 362 }
 363
 364 llvm::Error YAMLGenerator::generateDocForInfo(Info *I, llvm::raw_ostream &OS,
 365                                               const ClangDocContext &CDCtx) {
 366   llvm::yaml::Output InfoYAML(OS);
 367   switch (I->IT) {
 368   case InfoType::IT_namespace:
 369     InfoYAML << *static_cast<clang::doc::NamespaceInfo *>(I);
 370     break;
 371   case InfoType::IT_record:
 372     InfoYAML << *static_cast<clang::doc::RecordInfo *>(I);
 373     break;
 374   case InfoType::IT_enum:
 375     InfoYAML << *static_cast<clang::doc::EnumInfo *>(I);
 376     break;
 377   case InfoType::IT_function:
 378     InfoYAML << *static_cast<clang::doc::FunctionInfo *>(I);
 379     break;
 380   case InfoType::IT_typedef:
 381     InfoYAML << *static_cast<clang::doc::TypedefInfo *>(I);
 382     break;
 383   case InfoType::IT_default:
 384     return llvm::createStringError(llvm::inconvertibleErrorCode(),
 385                                    "unexpected InfoType");
 386   }
 387   return llvm::Error::success();
 388 }
 389
 390 static GeneratorRegistry::Add<YAMLGenerator> YAML(YAMLGenerator::Format,
 391                                                   "Generator for YAML output.");
 392
 393 // This anchor is used to force the linker to link in the generated object file
 394 // and thus register the generator.
 395 volatile int YAMLGeneratorAnchorSource = 0;
 396
 397 } // namespace doc
 398 } // namespace clang