Andrew Scull | 5e1ddfa | 2018-08-14 10:06:54 +0100 | [diff] [blame^] | 1 | //===- llvm/Support/CommandLine.h - Command line handler --------*- C++ -*-===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | // |
| 10 | // This class implements a command line argument processor that is useful when |
| 11 | // creating a tool. It provides a simple, minimalistic interface that is easily |
| 12 | // extensible and supports nonlocal (library) command line options. |
| 13 | // |
| 14 | // Note that rather than trying to figure out what this code does, you should |
| 15 | // read the library documentation located in docs/CommandLine.html or looks at |
| 16 | // the many example usages in tools/*/*.cpp |
| 17 | // |
| 18 | //===----------------------------------------------------------------------===// |
| 19 | |
| 20 | #ifndef LLVM_SUPPORT_COMMANDLINE_H |
| 21 | #define LLVM_SUPPORT_COMMANDLINE_H |
| 22 | |
| 23 | #include "llvm/ADT/ArrayRef.h" |
| 24 | #include "llvm/ADT/STLExtras.h" |
| 25 | #include "llvm/ADT/SmallPtrSet.h" |
| 26 | #include "llvm/ADT/SmallVector.h" |
| 27 | #include "llvm/ADT/StringMap.h" |
| 28 | #include "llvm/ADT/StringRef.h" |
| 29 | #include "llvm/ADT/Twine.h" |
| 30 | #include "llvm/ADT/iterator_range.h" |
| 31 | #include "llvm/Support/ErrorHandling.h" |
| 32 | #include "llvm/Support/ManagedStatic.h" |
| 33 | #include <cassert> |
| 34 | #include <climits> |
| 35 | #include <cstddef> |
| 36 | #include <functional> |
| 37 | #include <initializer_list> |
| 38 | #include <string> |
| 39 | #include <type_traits> |
| 40 | #include <vector> |
| 41 | |
| 42 | namespace llvm { |
| 43 | |
| 44 | class StringSaver; |
| 45 | class raw_ostream; |
| 46 | |
| 47 | /// cl Namespace - This namespace contains all of the command line option |
| 48 | /// processing machinery. It is intentionally a short name to make qualified |
| 49 | /// usage concise. |
| 50 | namespace cl { |
| 51 | |
| 52 | //===----------------------------------------------------------------------===// |
| 53 | // ParseCommandLineOptions - Command line option processing entry point. |
| 54 | // |
| 55 | // Returns true on success. Otherwise, this will print the error message to |
| 56 | // stderr and exit if \p Errs is not set (nullptr by default), or print the |
| 57 | // error message to \p Errs and return false if \p Errs is provided. |
| 58 | bool ParseCommandLineOptions(int argc, const char *const *argv, |
| 59 | StringRef Overview = "", |
| 60 | raw_ostream *Errs = nullptr); |
| 61 | |
| 62 | //===----------------------------------------------------------------------===// |
| 63 | // ParseEnvironmentOptions - Environment variable option processing alternate |
| 64 | // entry point. |
| 65 | // |
| 66 | void ParseEnvironmentOptions(const char *progName, const char *envvar, |
| 67 | const char *Overview = ""); |
| 68 | |
| 69 | // Function pointer type for printing version information. |
| 70 | using VersionPrinterTy = std::function<void(raw_ostream &)>; |
| 71 | |
| 72 | ///===---------------------------------------------------------------------===// |
| 73 | /// SetVersionPrinter - Override the default (LLVM specific) version printer |
| 74 | /// used to print out the version when --version is given |
| 75 | /// on the command line. This allows other systems using the |
| 76 | /// CommandLine utilities to print their own version string. |
| 77 | void SetVersionPrinter(VersionPrinterTy func); |
| 78 | |
| 79 | ///===---------------------------------------------------------------------===// |
| 80 | /// AddExtraVersionPrinter - Add an extra printer to use in addition to the |
| 81 | /// default one. This can be called multiple times, |
| 82 | /// and each time it adds a new function to the list |
| 83 | /// which will be called after the basic LLVM version |
| 84 | /// printing is complete. Each can then add additional |
| 85 | /// information specific to the tool. |
| 86 | void AddExtraVersionPrinter(VersionPrinterTy func); |
| 87 | |
| 88 | // PrintOptionValues - Print option values. |
| 89 | // With -print-options print the difference between option values and defaults. |
| 90 | // With -print-all-options print all option values. |
| 91 | // (Currently not perfect, but best-effort.) |
| 92 | void PrintOptionValues(); |
| 93 | |
| 94 | // Forward declaration - AddLiteralOption needs to be up here to make gcc happy. |
| 95 | class Option; |
| 96 | |
| 97 | /// \brief Adds a new option for parsing and provides the option it refers to. |
| 98 | /// |
| 99 | /// \param O pointer to the option |
| 100 | /// \param Name the string name for the option to handle during parsing |
| 101 | /// |
| 102 | /// Literal options are used by some parsers to register special option values. |
| 103 | /// This is how the PassNameParser registers pass names for opt. |
| 104 | void AddLiteralOption(Option &O, StringRef Name); |
| 105 | |
| 106 | //===----------------------------------------------------------------------===// |
| 107 | // Flags permitted to be passed to command line arguments |
| 108 | // |
| 109 | |
| 110 | enum NumOccurrencesFlag { // Flags for the number of occurrences allowed |
| 111 | Optional = 0x00, // Zero or One occurrence |
| 112 | ZeroOrMore = 0x01, // Zero or more occurrences allowed |
| 113 | Required = 0x02, // One occurrence required |
| 114 | OneOrMore = 0x03, // One or more occurrences required |
| 115 | |
| 116 | // ConsumeAfter - Indicates that this option is fed anything that follows the |
| 117 | // last positional argument required by the application (it is an error if |
| 118 | // there are zero positional arguments, and a ConsumeAfter option is used). |
| 119 | // Thus, for example, all arguments to LLI are processed until a filename is |
| 120 | // found. Once a filename is found, all of the succeeding arguments are |
| 121 | // passed, unprocessed, to the ConsumeAfter option. |
| 122 | // |
| 123 | ConsumeAfter = 0x04 |
| 124 | }; |
| 125 | |
| 126 | enum ValueExpected { // Is a value required for the option? |
| 127 | // zero reserved for the unspecified value |
| 128 | ValueOptional = 0x01, // The value can appear... or not |
| 129 | ValueRequired = 0x02, // The value is required to appear! |
| 130 | ValueDisallowed = 0x03 // A value may not be specified (for flags) |
| 131 | }; |
| 132 | |
| 133 | enum OptionHidden { // Control whether -help shows this option |
| 134 | NotHidden = 0x00, // Option included in -help & -help-hidden |
| 135 | Hidden = 0x01, // -help doesn't, but -help-hidden does |
| 136 | ReallyHidden = 0x02 // Neither -help nor -help-hidden show this arg |
| 137 | }; |
| 138 | |
| 139 | // Formatting flags - This controls special features that the option might have |
| 140 | // that cause it to be parsed differently... |
| 141 | // |
| 142 | // Prefix - This option allows arguments that are otherwise unrecognized to be |
| 143 | // matched by options that are a prefix of the actual value. This is useful for |
| 144 | // cases like a linker, where options are typically of the form '-lfoo' or |
| 145 | // '-L../../include' where -l or -L are the actual flags. When prefix is |
| 146 | // enabled, and used, the value for the flag comes from the suffix of the |
| 147 | // argument. |
| 148 | // |
| 149 | // Grouping - With this option enabled, multiple letter options are allowed to |
| 150 | // bunch together with only a single hyphen for the whole group. This allows |
| 151 | // emulation of the behavior that ls uses for example: ls -la === ls -l -a |
| 152 | // |
| 153 | |
| 154 | enum FormattingFlags { |
| 155 | NormalFormatting = 0x00, // Nothing special |
| 156 | Positional = 0x01, // Is a positional argument, no '-' required |
| 157 | Prefix = 0x02, // Can this option directly prefix its value? |
| 158 | Grouping = 0x03 // Can this option group with other options? |
| 159 | }; |
| 160 | |
| 161 | enum MiscFlags { // Miscellaneous flags to adjust argument |
| 162 | CommaSeparated = 0x01, // Should this cl::list split between commas? |
| 163 | PositionalEatsArgs = 0x02, // Should this positional cl::list eat -args? |
| 164 | Sink = 0x04 // Should this cl::list eat all unknown options? |
| 165 | }; |
| 166 | |
| 167 | //===----------------------------------------------------------------------===// |
| 168 | // Option Category class |
| 169 | // |
| 170 | class OptionCategory { |
| 171 | private: |
| 172 | StringRef const Name; |
| 173 | StringRef const Description; |
| 174 | |
| 175 | void registerCategory(); |
| 176 | |
| 177 | public: |
| 178 | OptionCategory(StringRef const Name, |
| 179 | StringRef const Description = "") |
| 180 | : Name(Name), Description(Description) { |
| 181 | registerCategory(); |
| 182 | } |
| 183 | |
| 184 | StringRef getName() const { return Name; } |
| 185 | StringRef getDescription() const { return Description; } |
| 186 | }; |
| 187 | |
| 188 | // The general Option Category (used as default category). |
| 189 | extern OptionCategory GeneralCategory; |
| 190 | |
| 191 | //===----------------------------------------------------------------------===// |
| 192 | // SubCommand class |
| 193 | // |
| 194 | class SubCommand { |
| 195 | private: |
| 196 | StringRef Name; |
| 197 | StringRef Description; |
| 198 | |
| 199 | protected: |
| 200 | void registerSubCommand(); |
| 201 | void unregisterSubCommand(); |
| 202 | |
| 203 | public: |
| 204 | SubCommand(StringRef Name, StringRef Description = "") |
| 205 | : Name(Name), Description(Description) { |
| 206 | registerSubCommand(); |
| 207 | } |
| 208 | SubCommand() = default; |
| 209 | |
| 210 | void reset(); |
| 211 | |
| 212 | explicit operator bool() const; |
| 213 | |
| 214 | StringRef getName() const { return Name; } |
| 215 | StringRef getDescription() const { return Description; } |
| 216 | |
| 217 | SmallVector<Option *, 4> PositionalOpts; |
| 218 | SmallVector<Option *, 4> SinkOpts; |
| 219 | StringMap<Option *> OptionsMap; |
| 220 | |
| 221 | Option *ConsumeAfterOpt = nullptr; // The ConsumeAfter option if it exists. |
| 222 | }; |
| 223 | |
| 224 | // A special subcommand representing no subcommand |
| 225 | extern ManagedStatic<SubCommand> TopLevelSubCommand; |
| 226 | |
| 227 | // A special subcommand that can be used to put an option into all subcommands. |
| 228 | extern ManagedStatic<SubCommand> AllSubCommands; |
| 229 | |
| 230 | //===----------------------------------------------------------------------===// |
| 231 | // Option Base class |
| 232 | // |
| 233 | class Option { |
| 234 | friend class alias; |
| 235 | |
| 236 | // handleOccurrences - Overriden by subclasses to handle the value passed into |
| 237 | // an argument. Should return true if there was an error processing the |
| 238 | // argument and the program should exit. |
| 239 | // |
| 240 | virtual bool handleOccurrence(unsigned pos, StringRef ArgName, |
| 241 | StringRef Arg) = 0; |
| 242 | |
| 243 | virtual enum ValueExpected getValueExpectedFlagDefault() const { |
| 244 | return ValueOptional; |
| 245 | } |
| 246 | |
| 247 | // Out of line virtual function to provide home for the class. |
| 248 | virtual void anchor(); |
| 249 | |
| 250 | int NumOccurrences = 0; // The number of times specified |
| 251 | // Occurrences, HiddenFlag, and Formatting are all enum types but to avoid |
| 252 | // problems with signed enums in bitfields. |
| 253 | unsigned Occurrences : 3; // enum NumOccurrencesFlag |
| 254 | // not using the enum type for 'Value' because zero is an implementation |
| 255 | // detail representing the non-value |
| 256 | unsigned Value : 2; |
| 257 | unsigned HiddenFlag : 2; // enum OptionHidden |
| 258 | unsigned Formatting : 2; // enum FormattingFlags |
| 259 | unsigned Misc : 3; |
| 260 | unsigned Position = 0; // Position of last occurrence of the option |
| 261 | unsigned AdditionalVals = 0; // Greater than 0 for multi-valued option. |
| 262 | |
| 263 | public: |
| 264 | StringRef ArgStr; // The argument string itself (ex: "help", "o") |
| 265 | StringRef HelpStr; // The descriptive text message for -help |
| 266 | StringRef ValueStr; // String describing what the value of this option is |
| 267 | OptionCategory *Category; // The Category this option belongs to |
| 268 | SmallPtrSet<SubCommand *, 4> Subs; // The subcommands this option belongs to. |
| 269 | bool FullyInitialized = false; // Has addArgument been called? |
| 270 | |
| 271 | inline enum NumOccurrencesFlag getNumOccurrencesFlag() const { |
| 272 | return (enum NumOccurrencesFlag)Occurrences; |
| 273 | } |
| 274 | |
| 275 | inline enum ValueExpected getValueExpectedFlag() const { |
| 276 | return Value ? ((enum ValueExpected)Value) : getValueExpectedFlagDefault(); |
| 277 | } |
| 278 | |
| 279 | inline enum OptionHidden getOptionHiddenFlag() const { |
| 280 | return (enum OptionHidden)HiddenFlag; |
| 281 | } |
| 282 | |
| 283 | inline enum FormattingFlags getFormattingFlag() const { |
| 284 | return (enum FormattingFlags)Formatting; |
| 285 | } |
| 286 | |
| 287 | inline unsigned getMiscFlags() const { return Misc; } |
| 288 | inline unsigned getPosition() const { return Position; } |
| 289 | inline unsigned getNumAdditionalVals() const { return AdditionalVals; } |
| 290 | |
| 291 | // hasArgStr - Return true if the argstr != "" |
| 292 | bool hasArgStr() const { return !ArgStr.empty(); } |
| 293 | bool isPositional() const { return getFormattingFlag() == cl::Positional; } |
| 294 | bool isSink() const { return getMiscFlags() & cl::Sink; } |
| 295 | |
| 296 | bool isConsumeAfter() const { |
| 297 | return getNumOccurrencesFlag() == cl::ConsumeAfter; |
| 298 | } |
| 299 | |
| 300 | bool isInAllSubCommands() const { |
| 301 | return any_of(Subs, [](const SubCommand *SC) { |
| 302 | return SC == &*AllSubCommands; |
| 303 | }); |
| 304 | } |
| 305 | |
| 306 | //-------------------------------------------------------------------------=== |
| 307 | // Accessor functions set by OptionModifiers |
| 308 | // |
| 309 | void setArgStr(StringRef S); |
| 310 | void setDescription(StringRef S) { HelpStr = S; } |
| 311 | void setValueStr(StringRef S) { ValueStr = S; } |
| 312 | void setNumOccurrencesFlag(enum NumOccurrencesFlag Val) { Occurrences = Val; } |
| 313 | void setValueExpectedFlag(enum ValueExpected Val) { Value = Val; } |
| 314 | void setHiddenFlag(enum OptionHidden Val) { HiddenFlag = Val; } |
| 315 | void setFormattingFlag(enum FormattingFlags V) { Formatting = V; } |
| 316 | void setMiscFlag(enum MiscFlags M) { Misc |= M; } |
| 317 | void setPosition(unsigned pos) { Position = pos; } |
| 318 | void setCategory(OptionCategory &C) { Category = &C; } |
| 319 | void addSubCommand(SubCommand &S) { Subs.insert(&S); } |
| 320 | |
| 321 | protected: |
| 322 | explicit Option(enum NumOccurrencesFlag OccurrencesFlag, |
| 323 | enum OptionHidden Hidden) |
| 324 | : Occurrences(OccurrencesFlag), Value(0), HiddenFlag(Hidden), |
| 325 | Formatting(NormalFormatting), Misc(0), Category(&GeneralCategory) {} |
| 326 | |
| 327 | inline void setNumAdditionalVals(unsigned n) { AdditionalVals = n; } |
| 328 | |
| 329 | public: |
| 330 | virtual ~Option() = default; |
| 331 | |
| 332 | // addArgument - Register this argument with the commandline system. |
| 333 | // |
| 334 | void addArgument(); |
| 335 | |
| 336 | /// Unregisters this option from the CommandLine system. |
| 337 | /// |
| 338 | /// This option must have been the last option registered. |
| 339 | /// For testing purposes only. |
| 340 | void removeArgument(); |
| 341 | |
| 342 | // Return the width of the option tag for printing... |
| 343 | virtual size_t getOptionWidth() const = 0; |
| 344 | |
| 345 | // printOptionInfo - Print out information about this option. The |
| 346 | // to-be-maintained width is specified. |
| 347 | // |
| 348 | virtual void printOptionInfo(size_t GlobalWidth) const = 0; |
| 349 | |
| 350 | virtual void printOptionValue(size_t GlobalWidth, bool Force) const = 0; |
| 351 | |
| 352 | virtual void setDefault() = 0; |
| 353 | |
| 354 | static void printHelpStr(StringRef HelpStr, size_t Indent, |
| 355 | size_t FirstLineIndentedBy); |
| 356 | |
| 357 | virtual void getExtraOptionNames(SmallVectorImpl<StringRef> &) {} |
| 358 | |
| 359 | // addOccurrence - Wrapper around handleOccurrence that enforces Flags. |
| 360 | // |
| 361 | virtual bool addOccurrence(unsigned pos, StringRef ArgName, StringRef Value, |
| 362 | bool MultiArg = false); |
| 363 | |
| 364 | // Prints option name followed by message. Always returns true. |
| 365 | bool error(const Twine &Message, StringRef ArgName = StringRef()); |
| 366 | |
| 367 | inline int getNumOccurrences() const { return NumOccurrences; } |
| 368 | inline void reset() { NumOccurrences = 0; } |
| 369 | }; |
| 370 | |
| 371 | //===----------------------------------------------------------------------===// |
| 372 | // Command line option modifiers that can be used to modify the behavior of |
| 373 | // command line option parsers... |
| 374 | // |
| 375 | |
| 376 | // desc - Modifier to set the description shown in the -help output... |
| 377 | struct desc { |
| 378 | StringRef Desc; |
| 379 | |
| 380 | desc(StringRef Str) : Desc(Str) {} |
| 381 | |
| 382 | void apply(Option &O) const { O.setDescription(Desc); } |
| 383 | }; |
| 384 | |
| 385 | // value_desc - Modifier to set the value description shown in the -help |
| 386 | // output... |
| 387 | struct value_desc { |
| 388 | StringRef Desc; |
| 389 | |
| 390 | value_desc(StringRef Str) : Desc(Str) {} |
| 391 | |
| 392 | void apply(Option &O) const { O.setValueStr(Desc); } |
| 393 | }; |
| 394 | |
| 395 | // init - Specify a default (initial) value for the command line argument, if |
| 396 | // the default constructor for the argument type does not give you what you |
| 397 | // want. This is only valid on "opt" arguments, not on "list" arguments. |
| 398 | // |
| 399 | template <class Ty> struct initializer { |
| 400 | const Ty &Init; |
| 401 | initializer(const Ty &Val) : Init(Val) {} |
| 402 | |
| 403 | template <class Opt> void apply(Opt &O) const { O.setInitialValue(Init); } |
| 404 | }; |
| 405 | |
| 406 | template <class Ty> initializer<Ty> init(const Ty &Val) { |
| 407 | return initializer<Ty>(Val); |
| 408 | } |
| 409 | |
| 410 | // location - Allow the user to specify which external variable they want to |
| 411 | // store the results of the command line argument processing into, if they don't |
| 412 | // want to store it in the option itself. |
| 413 | // |
| 414 | template <class Ty> struct LocationClass { |
| 415 | Ty &Loc; |
| 416 | |
| 417 | LocationClass(Ty &L) : Loc(L) {} |
| 418 | |
| 419 | template <class Opt> void apply(Opt &O) const { O.setLocation(O, Loc); } |
| 420 | }; |
| 421 | |
| 422 | template <class Ty> LocationClass<Ty> location(Ty &L) { |
| 423 | return LocationClass<Ty>(L); |
| 424 | } |
| 425 | |
| 426 | // cat - Specifiy the Option category for the command line argument to belong |
| 427 | // to. |
| 428 | struct cat { |
| 429 | OptionCategory &Category; |
| 430 | |
| 431 | cat(OptionCategory &c) : Category(c) {} |
| 432 | |
| 433 | template <class Opt> void apply(Opt &O) const { O.setCategory(Category); } |
| 434 | }; |
| 435 | |
| 436 | // sub - Specify the subcommand that this option belongs to. |
| 437 | struct sub { |
| 438 | SubCommand ⋐ |
| 439 | |
| 440 | sub(SubCommand &S) : Sub(S) {} |
| 441 | |
| 442 | template <class Opt> void apply(Opt &O) const { O.addSubCommand(Sub); } |
| 443 | }; |
| 444 | |
| 445 | //===----------------------------------------------------------------------===// |
| 446 | // OptionValue class |
| 447 | |
| 448 | // Support value comparison outside the template. |
| 449 | struct GenericOptionValue { |
| 450 | virtual bool compare(const GenericOptionValue &V) const = 0; |
| 451 | |
| 452 | protected: |
| 453 | GenericOptionValue() = default; |
| 454 | GenericOptionValue(const GenericOptionValue&) = default; |
| 455 | GenericOptionValue &operator=(const GenericOptionValue &) = default; |
| 456 | ~GenericOptionValue() = default; |
| 457 | |
| 458 | private: |
| 459 | virtual void anchor(); |
| 460 | }; |
| 461 | |
| 462 | template <class DataType> struct OptionValue; |
| 463 | |
| 464 | // The default value safely does nothing. Option value printing is only |
| 465 | // best-effort. |
| 466 | template <class DataType, bool isClass> |
| 467 | struct OptionValueBase : public GenericOptionValue { |
| 468 | // Temporary storage for argument passing. |
| 469 | using WrapperType = OptionValue<DataType>; |
| 470 | |
| 471 | bool hasValue() const { return false; } |
| 472 | |
| 473 | const DataType &getValue() const { llvm_unreachable("no default value"); } |
| 474 | |
| 475 | // Some options may take their value from a different data type. |
| 476 | template <class DT> void setValue(const DT & /*V*/) {} |
| 477 | |
| 478 | bool compare(const DataType & /*V*/) const { return false; } |
| 479 | |
| 480 | bool compare(const GenericOptionValue & /*V*/) const override { |
| 481 | return false; |
| 482 | } |
| 483 | |
| 484 | protected: |
| 485 | ~OptionValueBase() = default; |
| 486 | }; |
| 487 | |
| 488 | // Simple copy of the option value. |
| 489 | template <class DataType> class OptionValueCopy : public GenericOptionValue { |
| 490 | DataType Value; |
| 491 | bool Valid = false; |
| 492 | |
| 493 | protected: |
| 494 | OptionValueCopy(const OptionValueCopy&) = default; |
| 495 | OptionValueCopy &operator=(const OptionValueCopy &) = default; |
| 496 | ~OptionValueCopy() = default; |
| 497 | |
| 498 | public: |
| 499 | OptionValueCopy() = default; |
| 500 | |
| 501 | bool hasValue() const { return Valid; } |
| 502 | |
| 503 | const DataType &getValue() const { |
| 504 | assert(Valid && "invalid option value"); |
| 505 | return Value; |
| 506 | } |
| 507 | |
| 508 | void setValue(const DataType &V) { |
| 509 | Valid = true; |
| 510 | Value = V; |
| 511 | } |
| 512 | |
| 513 | bool compare(const DataType &V) const { return Valid && (Value != V); } |
| 514 | |
| 515 | bool compare(const GenericOptionValue &V) const override { |
| 516 | const OptionValueCopy<DataType> &VC = |
| 517 | static_cast<const OptionValueCopy<DataType> &>(V); |
| 518 | if (!VC.hasValue()) |
| 519 | return false; |
| 520 | return compare(VC.getValue()); |
| 521 | } |
| 522 | }; |
| 523 | |
| 524 | // Non-class option values. |
| 525 | template <class DataType> |
| 526 | struct OptionValueBase<DataType, false> : OptionValueCopy<DataType> { |
| 527 | using WrapperType = DataType; |
| 528 | |
| 529 | protected: |
| 530 | OptionValueBase() = default; |
| 531 | OptionValueBase(const OptionValueBase&) = default; |
| 532 | OptionValueBase &operator=(const OptionValueBase &) = default; |
| 533 | ~OptionValueBase() = default; |
| 534 | }; |
| 535 | |
| 536 | // Top-level option class. |
| 537 | template <class DataType> |
| 538 | struct OptionValue final |
| 539 | : OptionValueBase<DataType, std::is_class<DataType>::value> { |
| 540 | OptionValue() = default; |
| 541 | |
| 542 | OptionValue(const DataType &V) { this->setValue(V); } |
| 543 | |
| 544 | // Some options may take their value from a different data type. |
| 545 | template <class DT> OptionValue<DataType> &operator=(const DT &V) { |
| 546 | this->setValue(V); |
| 547 | return *this; |
| 548 | } |
| 549 | }; |
| 550 | |
| 551 | // Other safe-to-copy-by-value common option types. |
| 552 | enum boolOrDefault { BOU_UNSET, BOU_TRUE, BOU_FALSE }; |
| 553 | template <> |
| 554 | struct OptionValue<cl::boolOrDefault> final |
| 555 | : OptionValueCopy<cl::boolOrDefault> { |
| 556 | using WrapperType = cl::boolOrDefault; |
| 557 | |
| 558 | OptionValue() = default; |
| 559 | |
| 560 | OptionValue(const cl::boolOrDefault &V) { this->setValue(V); } |
| 561 | |
| 562 | OptionValue<cl::boolOrDefault> &operator=(const cl::boolOrDefault &V) { |
| 563 | setValue(V); |
| 564 | return *this; |
| 565 | } |
| 566 | |
| 567 | private: |
| 568 | void anchor() override; |
| 569 | }; |
| 570 | |
| 571 | template <> |
| 572 | struct OptionValue<std::string> final : OptionValueCopy<std::string> { |
| 573 | using WrapperType = StringRef; |
| 574 | |
| 575 | OptionValue() = default; |
| 576 | |
| 577 | OptionValue(const std::string &V) { this->setValue(V); } |
| 578 | |
| 579 | OptionValue<std::string> &operator=(const std::string &V) { |
| 580 | setValue(V); |
| 581 | return *this; |
| 582 | } |
| 583 | |
| 584 | private: |
| 585 | void anchor() override; |
| 586 | }; |
| 587 | |
| 588 | //===----------------------------------------------------------------------===// |
| 589 | // Enum valued command line option |
| 590 | // |
| 591 | |
| 592 | // This represents a single enum value, using "int" as the underlying type. |
| 593 | struct OptionEnumValue { |
| 594 | StringRef Name; |
| 595 | int Value; |
| 596 | StringRef Description; |
| 597 | }; |
| 598 | |
| 599 | #define clEnumVal(ENUMVAL, DESC) \ |
| 600 | llvm::cl::OptionEnumValue { #ENUMVAL, int(ENUMVAL), DESC } |
| 601 | #define clEnumValN(ENUMVAL, FLAGNAME, DESC) \ |
| 602 | llvm::cl::OptionEnumValue { FLAGNAME, int(ENUMVAL), DESC } |
| 603 | |
| 604 | // values - For custom data types, allow specifying a group of values together |
| 605 | // as the values that go into the mapping that the option handler uses. |
| 606 | // |
| 607 | class ValuesClass { |
| 608 | // Use a vector instead of a map, because the lists should be short, |
| 609 | // the overhead is less, and most importantly, it keeps them in the order |
| 610 | // inserted so we can print our option out nicely. |
| 611 | SmallVector<OptionEnumValue, 4> Values; |
| 612 | |
| 613 | public: |
| 614 | ValuesClass(std::initializer_list<OptionEnumValue> Options) |
| 615 | : Values(Options) {} |
| 616 | |
| 617 | template <class Opt> void apply(Opt &O) const { |
| 618 | for (auto Value : Values) |
| 619 | O.getParser().addLiteralOption(Value.Name, Value.Value, |
| 620 | Value.Description); |
| 621 | } |
| 622 | }; |
| 623 | |
| 624 | /// Helper to build a ValuesClass by forwarding a variable number of arguments |
| 625 | /// as an initializer list to the ValuesClass constructor. |
| 626 | template <typename... OptsTy> ValuesClass values(OptsTy... Options) { |
| 627 | return ValuesClass({Options...}); |
| 628 | } |
| 629 | |
| 630 | //===----------------------------------------------------------------------===// |
| 631 | // parser class - Parameterizable parser for different data types. By default, |
| 632 | // known data types (string, int, bool) have specialized parsers, that do what |
| 633 | // you would expect. The default parser, used for data types that are not |
| 634 | // built-in, uses a mapping table to map specific options to values, which is |
| 635 | // used, among other things, to handle enum types. |
| 636 | |
| 637 | //-------------------------------------------------- |
| 638 | // generic_parser_base - This class holds all the non-generic code that we do |
| 639 | // not need replicated for every instance of the generic parser. This also |
| 640 | // allows us to put stuff into CommandLine.cpp |
| 641 | // |
| 642 | class generic_parser_base { |
| 643 | protected: |
| 644 | class GenericOptionInfo { |
| 645 | public: |
| 646 | GenericOptionInfo(StringRef name, StringRef helpStr) |
| 647 | : Name(name), HelpStr(helpStr) {} |
| 648 | StringRef Name; |
| 649 | StringRef HelpStr; |
| 650 | }; |
| 651 | |
| 652 | public: |
| 653 | generic_parser_base(Option &O) : Owner(O) {} |
| 654 | |
| 655 | virtual ~generic_parser_base() = default; |
| 656 | // Base class should have virtual-destructor |
| 657 | |
| 658 | // getNumOptions - Virtual function implemented by generic subclass to |
| 659 | // indicate how many entries are in Values. |
| 660 | // |
| 661 | virtual unsigned getNumOptions() const = 0; |
| 662 | |
| 663 | // getOption - Return option name N. |
| 664 | virtual StringRef getOption(unsigned N) const = 0; |
| 665 | |
| 666 | // getDescription - Return description N |
| 667 | virtual StringRef getDescription(unsigned N) const = 0; |
| 668 | |
| 669 | // Return the width of the option tag for printing... |
| 670 | virtual size_t getOptionWidth(const Option &O) const; |
| 671 | |
| 672 | virtual const GenericOptionValue &getOptionValue(unsigned N) const = 0; |
| 673 | |
| 674 | // printOptionInfo - Print out information about this option. The |
| 675 | // to-be-maintained width is specified. |
| 676 | // |
| 677 | virtual void printOptionInfo(const Option &O, size_t GlobalWidth) const; |
| 678 | |
| 679 | void printGenericOptionDiff(const Option &O, const GenericOptionValue &V, |
| 680 | const GenericOptionValue &Default, |
| 681 | size_t GlobalWidth) const; |
| 682 | |
| 683 | // printOptionDiff - print the value of an option and it's default. |
| 684 | // |
| 685 | // Template definition ensures that the option and default have the same |
| 686 | // DataType (via the same AnyOptionValue). |
| 687 | template <class AnyOptionValue> |
| 688 | void printOptionDiff(const Option &O, const AnyOptionValue &V, |
| 689 | const AnyOptionValue &Default, |
| 690 | size_t GlobalWidth) const { |
| 691 | printGenericOptionDiff(O, V, Default, GlobalWidth); |
| 692 | } |
| 693 | |
| 694 | void initialize() {} |
| 695 | |
| 696 | void getExtraOptionNames(SmallVectorImpl<StringRef> &OptionNames) { |
| 697 | // If there has been no argstr specified, that means that we need to add an |
| 698 | // argument for every possible option. This ensures that our options are |
| 699 | // vectored to us. |
| 700 | if (!Owner.hasArgStr()) |
| 701 | for (unsigned i = 0, e = getNumOptions(); i != e; ++i) |
| 702 | OptionNames.push_back(getOption(i)); |
| 703 | } |
| 704 | |
| 705 | enum ValueExpected getValueExpectedFlagDefault() const { |
| 706 | // If there is an ArgStr specified, then we are of the form: |
| 707 | // |
| 708 | // -opt=O2 or -opt O2 or -optO2 |
| 709 | // |
| 710 | // In which case, the value is required. Otherwise if an arg str has not |
| 711 | // been specified, we are of the form: |
| 712 | // |
| 713 | // -O2 or O2 or -la (where -l and -a are separate options) |
| 714 | // |
| 715 | // If this is the case, we cannot allow a value. |
| 716 | // |
| 717 | if (Owner.hasArgStr()) |
| 718 | return ValueRequired; |
| 719 | else |
| 720 | return ValueDisallowed; |
| 721 | } |
| 722 | |
| 723 | // findOption - Return the option number corresponding to the specified |
| 724 | // argument string. If the option is not found, getNumOptions() is returned. |
| 725 | // |
| 726 | unsigned findOption(StringRef Name); |
| 727 | |
| 728 | protected: |
| 729 | Option &Owner; |
| 730 | }; |
| 731 | |
| 732 | // Default parser implementation - This implementation depends on having a |
| 733 | // mapping of recognized options to values of some sort. In addition to this, |
| 734 | // each entry in the mapping also tracks a help message that is printed with the |
| 735 | // command line option for -help. Because this is a simple mapping parser, the |
| 736 | // data type can be any unsupported type. |
| 737 | // |
| 738 | template <class DataType> class parser : public generic_parser_base { |
| 739 | protected: |
| 740 | class OptionInfo : public GenericOptionInfo { |
| 741 | public: |
| 742 | OptionInfo(StringRef name, DataType v, StringRef helpStr) |
| 743 | : GenericOptionInfo(name, helpStr), V(v) {} |
| 744 | |
| 745 | OptionValue<DataType> V; |
| 746 | }; |
| 747 | SmallVector<OptionInfo, 8> Values; |
| 748 | |
| 749 | public: |
| 750 | parser(Option &O) : generic_parser_base(O) {} |
| 751 | |
| 752 | using parser_data_type = DataType; |
| 753 | |
| 754 | // Implement virtual functions needed by generic_parser_base |
| 755 | unsigned getNumOptions() const override { return unsigned(Values.size()); } |
| 756 | StringRef getOption(unsigned N) const override { return Values[N].Name; } |
| 757 | StringRef getDescription(unsigned N) const override { |
| 758 | return Values[N].HelpStr; |
| 759 | } |
| 760 | |
| 761 | // getOptionValue - Return the value of option name N. |
| 762 | const GenericOptionValue &getOptionValue(unsigned N) const override { |
| 763 | return Values[N].V; |
| 764 | } |
| 765 | |
| 766 | // parse - Return true on error. |
| 767 | bool parse(Option &O, StringRef ArgName, StringRef Arg, DataType &V) { |
| 768 | StringRef ArgVal; |
| 769 | if (Owner.hasArgStr()) |
| 770 | ArgVal = Arg; |
| 771 | else |
| 772 | ArgVal = ArgName; |
| 773 | |
| 774 | for (size_t i = 0, e = Values.size(); i != e; ++i) |
| 775 | if (Values[i].Name == ArgVal) { |
| 776 | V = Values[i].V.getValue(); |
| 777 | return false; |
| 778 | } |
| 779 | |
| 780 | return O.error("Cannot find option named '" + ArgVal + "'!"); |
| 781 | } |
| 782 | |
| 783 | /// addLiteralOption - Add an entry to the mapping table. |
| 784 | /// |
| 785 | template <class DT> |
| 786 | void addLiteralOption(StringRef Name, const DT &V, StringRef HelpStr) { |
| 787 | assert(findOption(Name) == Values.size() && "Option already exists!"); |
| 788 | OptionInfo X(Name, static_cast<DataType>(V), HelpStr); |
| 789 | Values.push_back(X); |
| 790 | AddLiteralOption(Owner, Name); |
| 791 | } |
| 792 | |
| 793 | /// removeLiteralOption - Remove the specified option. |
| 794 | /// |
| 795 | void removeLiteralOption(StringRef Name) { |
| 796 | unsigned N = findOption(Name); |
| 797 | assert(N != Values.size() && "Option not found!"); |
| 798 | Values.erase(Values.begin() + N); |
| 799 | } |
| 800 | }; |
| 801 | |
| 802 | //-------------------------------------------------- |
| 803 | // basic_parser - Super class of parsers to provide boilerplate code |
| 804 | // |
| 805 | class basic_parser_impl { // non-template implementation of basic_parser<t> |
| 806 | public: |
| 807 | basic_parser_impl(Option &) {} |
| 808 | |
| 809 | enum ValueExpected getValueExpectedFlagDefault() const { |
| 810 | return ValueRequired; |
| 811 | } |
| 812 | |
| 813 | void getExtraOptionNames(SmallVectorImpl<StringRef> &) {} |
| 814 | |
| 815 | void initialize() {} |
| 816 | |
| 817 | // Return the width of the option tag for printing... |
| 818 | size_t getOptionWidth(const Option &O) const; |
| 819 | |
| 820 | // printOptionInfo - Print out information about this option. The |
| 821 | // to-be-maintained width is specified. |
| 822 | // |
| 823 | void printOptionInfo(const Option &O, size_t GlobalWidth) const; |
| 824 | |
| 825 | // printOptionNoValue - Print a placeholder for options that don't yet support |
| 826 | // printOptionDiff(). |
| 827 | void printOptionNoValue(const Option &O, size_t GlobalWidth) const; |
| 828 | |
| 829 | // getValueName - Overload in subclass to provide a better default value. |
| 830 | virtual StringRef getValueName() const { return "value"; } |
| 831 | |
| 832 | // An out-of-line virtual method to provide a 'home' for this class. |
| 833 | virtual void anchor(); |
| 834 | |
| 835 | protected: |
| 836 | ~basic_parser_impl() = default; |
| 837 | |
| 838 | // A helper for basic_parser::printOptionDiff. |
| 839 | void printOptionName(const Option &O, size_t GlobalWidth) const; |
| 840 | }; |
| 841 | |
| 842 | // basic_parser - The real basic parser is just a template wrapper that provides |
| 843 | // a typedef for the provided data type. |
| 844 | // |
| 845 | template <class DataType> class basic_parser : public basic_parser_impl { |
| 846 | public: |
| 847 | using parser_data_type = DataType; |
| 848 | using OptVal = OptionValue<DataType>; |
| 849 | |
| 850 | basic_parser(Option &O) : basic_parser_impl(O) {} |
| 851 | |
| 852 | protected: |
| 853 | ~basic_parser() = default; |
| 854 | }; |
| 855 | |
| 856 | //-------------------------------------------------- |
| 857 | // parser<bool> |
| 858 | // |
| 859 | template <> class parser<bool> final : public basic_parser<bool> { |
| 860 | public: |
| 861 | parser(Option &O) : basic_parser(O) {} |
| 862 | |
| 863 | // parse - Return true on error. |
| 864 | bool parse(Option &O, StringRef ArgName, StringRef Arg, bool &Val); |
| 865 | |
| 866 | void initialize() {} |
| 867 | |
| 868 | enum ValueExpected getValueExpectedFlagDefault() const { |
| 869 | return ValueOptional; |
| 870 | } |
| 871 | |
| 872 | // getValueName - Do not print =<value> at all. |
| 873 | StringRef getValueName() const override { return StringRef(); } |
| 874 | |
| 875 | void printOptionDiff(const Option &O, bool V, OptVal Default, |
| 876 | size_t GlobalWidth) const; |
| 877 | |
| 878 | // An out-of-line virtual method to provide a 'home' for this class. |
| 879 | void anchor() override; |
| 880 | }; |
| 881 | |
| 882 | extern template class basic_parser<bool>; |
| 883 | |
| 884 | //-------------------------------------------------- |
| 885 | // parser<boolOrDefault> |
| 886 | template <> |
| 887 | class parser<boolOrDefault> final : public basic_parser<boolOrDefault> { |
| 888 | public: |
| 889 | parser(Option &O) : basic_parser(O) {} |
| 890 | |
| 891 | // parse - Return true on error. |
| 892 | bool parse(Option &O, StringRef ArgName, StringRef Arg, boolOrDefault &Val); |
| 893 | |
| 894 | enum ValueExpected getValueExpectedFlagDefault() const { |
| 895 | return ValueOptional; |
| 896 | } |
| 897 | |
| 898 | // getValueName - Do not print =<value> at all. |
| 899 | StringRef getValueName() const override { return StringRef(); } |
| 900 | |
| 901 | void printOptionDiff(const Option &O, boolOrDefault V, OptVal Default, |
| 902 | size_t GlobalWidth) const; |
| 903 | |
| 904 | // An out-of-line virtual method to provide a 'home' for this class. |
| 905 | void anchor() override; |
| 906 | }; |
| 907 | |
| 908 | extern template class basic_parser<boolOrDefault>; |
| 909 | |
| 910 | //-------------------------------------------------- |
| 911 | // parser<int> |
| 912 | // |
| 913 | template <> class parser<int> final : public basic_parser<int> { |
| 914 | public: |
| 915 | parser(Option &O) : basic_parser(O) {} |
| 916 | |
| 917 | // parse - Return true on error. |
| 918 | bool parse(Option &O, StringRef ArgName, StringRef Arg, int &Val); |
| 919 | |
| 920 | // getValueName - Overload in subclass to provide a better default value. |
| 921 | StringRef getValueName() const override { return "int"; } |
| 922 | |
| 923 | void printOptionDiff(const Option &O, int V, OptVal Default, |
| 924 | size_t GlobalWidth) const; |
| 925 | |
| 926 | // An out-of-line virtual method to provide a 'home' for this class. |
| 927 | void anchor() override; |
| 928 | }; |
| 929 | |
| 930 | extern template class basic_parser<int>; |
| 931 | |
| 932 | //-------------------------------------------------- |
| 933 | // parser<unsigned> |
| 934 | // |
| 935 | template <> class parser<unsigned> final : public basic_parser<unsigned> { |
| 936 | public: |
| 937 | parser(Option &O) : basic_parser(O) {} |
| 938 | |
| 939 | // parse - Return true on error. |
| 940 | bool parse(Option &O, StringRef ArgName, StringRef Arg, unsigned &Val); |
| 941 | |
| 942 | // getValueName - Overload in subclass to provide a better default value. |
| 943 | StringRef getValueName() const override { return "uint"; } |
| 944 | |
| 945 | void printOptionDiff(const Option &O, unsigned V, OptVal Default, |
| 946 | size_t GlobalWidth) const; |
| 947 | |
| 948 | // An out-of-line virtual method to provide a 'home' for this class. |
| 949 | void anchor() override; |
| 950 | }; |
| 951 | |
| 952 | extern template class basic_parser<unsigned>; |
| 953 | |
| 954 | //-------------------------------------------------- |
| 955 | // parser<unsigned long long> |
| 956 | // |
| 957 | template <> |
| 958 | class parser<unsigned long long> final |
| 959 | : public basic_parser<unsigned long long> { |
| 960 | public: |
| 961 | parser(Option &O) : basic_parser(O) {} |
| 962 | |
| 963 | // parse - Return true on error. |
| 964 | bool parse(Option &O, StringRef ArgName, StringRef Arg, |
| 965 | unsigned long long &Val); |
| 966 | |
| 967 | // getValueName - Overload in subclass to provide a better default value. |
| 968 | StringRef getValueName() const override { return "uint"; } |
| 969 | |
| 970 | void printOptionDiff(const Option &O, unsigned long long V, OptVal Default, |
| 971 | size_t GlobalWidth) const; |
| 972 | |
| 973 | // An out-of-line virtual method to provide a 'home' for this class. |
| 974 | void anchor() override; |
| 975 | }; |
| 976 | |
| 977 | extern template class basic_parser<unsigned long long>; |
| 978 | |
| 979 | //-------------------------------------------------- |
| 980 | // parser<double> |
| 981 | // |
| 982 | template <> class parser<double> final : public basic_parser<double> { |
| 983 | public: |
| 984 | parser(Option &O) : basic_parser(O) {} |
| 985 | |
| 986 | // parse - Return true on error. |
| 987 | bool parse(Option &O, StringRef ArgName, StringRef Arg, double &Val); |
| 988 | |
| 989 | // getValueName - Overload in subclass to provide a better default value. |
| 990 | StringRef getValueName() const override { return "number"; } |
| 991 | |
| 992 | void printOptionDiff(const Option &O, double V, OptVal Default, |
| 993 | size_t GlobalWidth) const; |
| 994 | |
| 995 | // An out-of-line virtual method to provide a 'home' for this class. |
| 996 | void anchor() override; |
| 997 | }; |
| 998 | |
| 999 | extern template class basic_parser<double>; |
| 1000 | |
| 1001 | //-------------------------------------------------- |
| 1002 | // parser<float> |
| 1003 | // |
| 1004 | template <> class parser<float> final : public basic_parser<float> { |
| 1005 | public: |
| 1006 | parser(Option &O) : basic_parser(O) {} |
| 1007 | |
| 1008 | // parse - Return true on error. |
| 1009 | bool parse(Option &O, StringRef ArgName, StringRef Arg, float &Val); |
| 1010 | |
| 1011 | // getValueName - Overload in subclass to provide a better default value. |
| 1012 | StringRef getValueName() const override { return "number"; } |
| 1013 | |
| 1014 | void printOptionDiff(const Option &O, float V, OptVal Default, |
| 1015 | size_t GlobalWidth) const; |
| 1016 | |
| 1017 | // An out-of-line virtual method to provide a 'home' for this class. |
| 1018 | void anchor() override; |
| 1019 | }; |
| 1020 | |
| 1021 | extern template class basic_parser<float>; |
| 1022 | |
| 1023 | //-------------------------------------------------- |
| 1024 | // parser<std::string> |
| 1025 | // |
| 1026 | template <> class parser<std::string> final : public basic_parser<std::string> { |
| 1027 | public: |
| 1028 | parser(Option &O) : basic_parser(O) {} |
| 1029 | |
| 1030 | // parse - Return true on error. |
| 1031 | bool parse(Option &, StringRef, StringRef Arg, std::string &Value) { |
| 1032 | Value = Arg.str(); |
| 1033 | return false; |
| 1034 | } |
| 1035 | |
| 1036 | // getValueName - Overload in subclass to provide a better default value. |
| 1037 | StringRef getValueName() const override { return "string"; } |
| 1038 | |
| 1039 | void printOptionDiff(const Option &O, StringRef V, const OptVal &Default, |
| 1040 | size_t GlobalWidth) const; |
| 1041 | |
| 1042 | // An out-of-line virtual method to provide a 'home' for this class. |
| 1043 | void anchor() override; |
| 1044 | }; |
| 1045 | |
| 1046 | extern template class basic_parser<std::string>; |
| 1047 | |
| 1048 | //-------------------------------------------------- |
| 1049 | // parser<char> |
| 1050 | // |
| 1051 | template <> class parser<char> final : public basic_parser<char> { |
| 1052 | public: |
| 1053 | parser(Option &O) : basic_parser(O) {} |
| 1054 | |
| 1055 | // parse - Return true on error. |
| 1056 | bool parse(Option &, StringRef, StringRef Arg, char &Value) { |
| 1057 | Value = Arg[0]; |
| 1058 | return false; |
| 1059 | } |
| 1060 | |
| 1061 | // getValueName - Overload in subclass to provide a better default value. |
| 1062 | StringRef getValueName() const override { return "char"; } |
| 1063 | |
| 1064 | void printOptionDiff(const Option &O, char V, OptVal Default, |
| 1065 | size_t GlobalWidth) const; |
| 1066 | |
| 1067 | // An out-of-line virtual method to provide a 'home' for this class. |
| 1068 | void anchor() override; |
| 1069 | }; |
| 1070 | |
| 1071 | extern template class basic_parser<char>; |
| 1072 | |
| 1073 | //-------------------------------------------------- |
| 1074 | // PrintOptionDiff |
| 1075 | // |
| 1076 | // This collection of wrappers is the intermediary between class opt and class |
| 1077 | // parser to handle all the template nastiness. |
| 1078 | |
| 1079 | // This overloaded function is selected by the generic parser. |
| 1080 | template <class ParserClass, class DT> |
| 1081 | void printOptionDiff(const Option &O, const generic_parser_base &P, const DT &V, |
| 1082 | const OptionValue<DT> &Default, size_t GlobalWidth) { |
| 1083 | OptionValue<DT> OV = V; |
| 1084 | P.printOptionDiff(O, OV, Default, GlobalWidth); |
| 1085 | } |
| 1086 | |
| 1087 | // This is instantiated for basic parsers when the parsed value has a different |
| 1088 | // type than the option value. e.g. HelpPrinter. |
| 1089 | template <class ParserDT, class ValDT> struct OptionDiffPrinter { |
| 1090 | void print(const Option &O, const parser<ParserDT> &P, const ValDT & /*V*/, |
| 1091 | const OptionValue<ValDT> & /*Default*/, size_t GlobalWidth) { |
| 1092 | P.printOptionNoValue(O, GlobalWidth); |
| 1093 | } |
| 1094 | }; |
| 1095 | |
| 1096 | // This is instantiated for basic parsers when the parsed value has the same |
| 1097 | // type as the option value. |
| 1098 | template <class DT> struct OptionDiffPrinter<DT, DT> { |
| 1099 | void print(const Option &O, const parser<DT> &P, const DT &V, |
| 1100 | const OptionValue<DT> &Default, size_t GlobalWidth) { |
| 1101 | P.printOptionDiff(O, V, Default, GlobalWidth); |
| 1102 | } |
| 1103 | }; |
| 1104 | |
| 1105 | // This overloaded function is selected by the basic parser, which may parse a |
| 1106 | // different type than the option type. |
| 1107 | template <class ParserClass, class ValDT> |
| 1108 | void printOptionDiff( |
| 1109 | const Option &O, |
| 1110 | const basic_parser<typename ParserClass::parser_data_type> &P, |
| 1111 | const ValDT &V, const OptionValue<ValDT> &Default, size_t GlobalWidth) { |
| 1112 | |
| 1113 | OptionDiffPrinter<typename ParserClass::parser_data_type, ValDT> printer; |
| 1114 | printer.print(O, static_cast<const ParserClass &>(P), V, Default, |
| 1115 | GlobalWidth); |
| 1116 | } |
| 1117 | |
| 1118 | //===----------------------------------------------------------------------===// |
| 1119 | // applicator class - This class is used because we must use partial |
| 1120 | // specialization to handle literal string arguments specially (const char* does |
| 1121 | // not correctly respond to the apply method). Because the syntax to use this |
| 1122 | // is a pain, we have the 'apply' method below to handle the nastiness... |
| 1123 | // |
| 1124 | template <class Mod> struct applicator { |
| 1125 | template <class Opt> static void opt(const Mod &M, Opt &O) { M.apply(O); } |
| 1126 | }; |
| 1127 | |
| 1128 | // Handle const char* as a special case... |
| 1129 | template <unsigned n> struct applicator<char[n]> { |
| 1130 | template <class Opt> static void opt(StringRef Str, Opt &O) { |
| 1131 | O.setArgStr(Str); |
| 1132 | } |
| 1133 | }; |
| 1134 | template <unsigned n> struct applicator<const char[n]> { |
| 1135 | template <class Opt> static void opt(StringRef Str, Opt &O) { |
| 1136 | O.setArgStr(Str); |
| 1137 | } |
| 1138 | }; |
| 1139 | template <> struct applicator<StringRef > { |
| 1140 | template <class Opt> static void opt(StringRef Str, Opt &O) { |
| 1141 | O.setArgStr(Str); |
| 1142 | } |
| 1143 | }; |
| 1144 | |
| 1145 | template <> struct applicator<NumOccurrencesFlag> { |
| 1146 | static void opt(NumOccurrencesFlag N, Option &O) { |
| 1147 | O.setNumOccurrencesFlag(N); |
| 1148 | } |
| 1149 | }; |
| 1150 | |
| 1151 | template <> struct applicator<ValueExpected> { |
| 1152 | static void opt(ValueExpected VE, Option &O) { O.setValueExpectedFlag(VE); } |
| 1153 | }; |
| 1154 | |
| 1155 | template <> struct applicator<OptionHidden> { |
| 1156 | static void opt(OptionHidden OH, Option &O) { O.setHiddenFlag(OH); } |
| 1157 | }; |
| 1158 | |
| 1159 | template <> struct applicator<FormattingFlags> { |
| 1160 | static void opt(FormattingFlags FF, Option &O) { O.setFormattingFlag(FF); } |
| 1161 | }; |
| 1162 | |
| 1163 | template <> struct applicator<MiscFlags> { |
| 1164 | static void opt(MiscFlags MF, Option &O) { O.setMiscFlag(MF); } |
| 1165 | }; |
| 1166 | |
| 1167 | // apply method - Apply modifiers to an option in a type safe way. |
| 1168 | template <class Opt, class Mod, class... Mods> |
| 1169 | void apply(Opt *O, const Mod &M, const Mods &... Ms) { |
| 1170 | applicator<Mod>::opt(M, *O); |
| 1171 | apply(O, Ms...); |
| 1172 | } |
| 1173 | |
| 1174 | template <class Opt, class Mod> void apply(Opt *O, const Mod &M) { |
| 1175 | applicator<Mod>::opt(M, *O); |
| 1176 | } |
| 1177 | |
| 1178 | //===----------------------------------------------------------------------===// |
| 1179 | // opt_storage class |
| 1180 | |
| 1181 | // Default storage class definition: external storage. This implementation |
| 1182 | // assumes the user will specify a variable to store the data into with the |
| 1183 | // cl::location(x) modifier. |
| 1184 | // |
| 1185 | template <class DataType, bool ExternalStorage, bool isClass> |
| 1186 | class opt_storage { |
| 1187 | DataType *Location = nullptr; // Where to store the object... |
| 1188 | OptionValue<DataType> Default; |
| 1189 | |
| 1190 | void check_location() const { |
| 1191 | assert(Location && "cl::location(...) not specified for a command " |
| 1192 | "line option with external storage, " |
| 1193 | "or cl::init specified before cl::location()!!"); |
| 1194 | } |
| 1195 | |
| 1196 | public: |
| 1197 | opt_storage() = default; |
| 1198 | |
| 1199 | bool setLocation(Option &O, DataType &L) { |
| 1200 | if (Location) |
| 1201 | return O.error("cl::location(x) specified more than once!"); |
| 1202 | Location = &L; |
| 1203 | Default = L; |
| 1204 | return false; |
| 1205 | } |
| 1206 | |
| 1207 | template <class T> void setValue(const T &V, bool initial = false) { |
| 1208 | check_location(); |
| 1209 | *Location = V; |
| 1210 | if (initial) |
| 1211 | Default = V; |
| 1212 | } |
| 1213 | |
| 1214 | DataType &getValue() { |
| 1215 | check_location(); |
| 1216 | return *Location; |
| 1217 | } |
| 1218 | const DataType &getValue() const { |
| 1219 | check_location(); |
| 1220 | return *Location; |
| 1221 | } |
| 1222 | |
| 1223 | operator DataType() const { return this->getValue(); } |
| 1224 | |
| 1225 | const OptionValue<DataType> &getDefault() const { return Default; } |
| 1226 | }; |
| 1227 | |
| 1228 | // Define how to hold a class type object, such as a string. Since we can |
| 1229 | // inherit from a class, we do so. This makes us exactly compatible with the |
| 1230 | // object in all cases that it is used. |
| 1231 | // |
| 1232 | template <class DataType> |
| 1233 | class opt_storage<DataType, false, true> : public DataType { |
| 1234 | public: |
| 1235 | OptionValue<DataType> Default; |
| 1236 | |
| 1237 | template <class T> void setValue(const T &V, bool initial = false) { |
| 1238 | DataType::operator=(V); |
| 1239 | if (initial) |
| 1240 | Default = V; |
| 1241 | } |
| 1242 | |
| 1243 | DataType &getValue() { return *this; } |
| 1244 | const DataType &getValue() const { return *this; } |
| 1245 | |
| 1246 | const OptionValue<DataType> &getDefault() const { return Default; } |
| 1247 | }; |
| 1248 | |
| 1249 | // Define a partial specialization to handle things we cannot inherit from. In |
| 1250 | // this case, we store an instance through containment, and overload operators |
| 1251 | // to get at the value. |
| 1252 | // |
| 1253 | template <class DataType> class opt_storage<DataType, false, false> { |
| 1254 | public: |
| 1255 | DataType Value; |
| 1256 | OptionValue<DataType> Default; |
| 1257 | |
| 1258 | // Make sure we initialize the value with the default constructor for the |
| 1259 | // type. |
| 1260 | opt_storage() : Value(DataType()), Default(DataType()) {} |
| 1261 | |
| 1262 | template <class T> void setValue(const T &V, bool initial = false) { |
| 1263 | Value = V; |
| 1264 | if (initial) |
| 1265 | Default = V; |
| 1266 | } |
| 1267 | DataType &getValue() { return Value; } |
| 1268 | DataType getValue() const { return Value; } |
| 1269 | |
| 1270 | const OptionValue<DataType> &getDefault() const { return Default; } |
| 1271 | |
| 1272 | operator DataType() const { return getValue(); } |
| 1273 | |
| 1274 | // If the datatype is a pointer, support -> on it. |
| 1275 | DataType operator->() const { return Value; } |
| 1276 | }; |
| 1277 | |
| 1278 | //===----------------------------------------------------------------------===// |
| 1279 | // opt - A scalar command line option. |
| 1280 | // |
| 1281 | template <class DataType, bool ExternalStorage = false, |
| 1282 | class ParserClass = parser<DataType>> |
| 1283 | class opt : public Option, |
| 1284 | public opt_storage<DataType, ExternalStorage, |
| 1285 | std::is_class<DataType>::value> { |
| 1286 | ParserClass Parser; |
| 1287 | |
| 1288 | bool handleOccurrence(unsigned pos, StringRef ArgName, |
| 1289 | StringRef Arg) override { |
| 1290 | typename ParserClass::parser_data_type Val = |
| 1291 | typename ParserClass::parser_data_type(); |
| 1292 | if (Parser.parse(*this, ArgName, Arg, Val)) |
| 1293 | return true; // Parse error! |
| 1294 | this->setValue(Val); |
| 1295 | this->setPosition(pos); |
| 1296 | return false; |
| 1297 | } |
| 1298 | |
| 1299 | enum ValueExpected getValueExpectedFlagDefault() const override { |
| 1300 | return Parser.getValueExpectedFlagDefault(); |
| 1301 | } |
| 1302 | |
| 1303 | void getExtraOptionNames(SmallVectorImpl<StringRef> &OptionNames) override { |
| 1304 | return Parser.getExtraOptionNames(OptionNames); |
| 1305 | } |
| 1306 | |
| 1307 | // Forward printing stuff to the parser... |
| 1308 | size_t getOptionWidth() const override { |
| 1309 | return Parser.getOptionWidth(*this); |
| 1310 | } |
| 1311 | |
| 1312 | void printOptionInfo(size_t GlobalWidth) const override { |
| 1313 | Parser.printOptionInfo(*this, GlobalWidth); |
| 1314 | } |
| 1315 | |
| 1316 | void printOptionValue(size_t GlobalWidth, bool Force) const override { |
| 1317 | if (Force || this->getDefault().compare(this->getValue())) { |
| 1318 | cl::printOptionDiff<ParserClass>(*this, Parser, this->getValue(), |
| 1319 | this->getDefault(), GlobalWidth); |
| 1320 | } |
| 1321 | } |
| 1322 | |
| 1323 | template <class T, class = typename std::enable_if< |
| 1324 | std::is_assignable<T&, T>::value>::type> |
| 1325 | void setDefaultImpl() { |
| 1326 | const OptionValue<DataType> &V = this->getDefault(); |
| 1327 | if (V.hasValue()) |
| 1328 | this->setValue(V.getValue()); |
| 1329 | } |
| 1330 | |
| 1331 | template <class T, class = typename std::enable_if< |
| 1332 | !std::is_assignable<T&, T>::value>::type> |
| 1333 | void setDefaultImpl(...) {} |
| 1334 | |
| 1335 | void setDefault() override { setDefaultImpl<DataType>(); } |
| 1336 | |
| 1337 | void done() { |
| 1338 | addArgument(); |
| 1339 | Parser.initialize(); |
| 1340 | } |
| 1341 | |
| 1342 | public: |
| 1343 | // Command line options should not be copyable |
| 1344 | opt(const opt &) = delete; |
| 1345 | opt &operator=(const opt &) = delete; |
| 1346 | |
| 1347 | // setInitialValue - Used by the cl::init modifier... |
| 1348 | void setInitialValue(const DataType &V) { this->setValue(V, true); } |
| 1349 | |
| 1350 | ParserClass &getParser() { return Parser; } |
| 1351 | |
| 1352 | template <class T> DataType &operator=(const T &Val) { |
| 1353 | this->setValue(Val); |
| 1354 | return this->getValue(); |
| 1355 | } |
| 1356 | |
| 1357 | template <class... Mods> |
| 1358 | explicit opt(const Mods &... Ms) |
| 1359 | : Option(Optional, NotHidden), Parser(*this) { |
| 1360 | apply(this, Ms...); |
| 1361 | done(); |
| 1362 | } |
| 1363 | }; |
| 1364 | |
| 1365 | extern template class opt<unsigned>; |
| 1366 | extern template class opt<int>; |
| 1367 | extern template class opt<std::string>; |
| 1368 | extern template class opt<char>; |
| 1369 | extern template class opt<bool>; |
| 1370 | |
| 1371 | //===----------------------------------------------------------------------===// |
| 1372 | // list_storage class |
| 1373 | |
| 1374 | // Default storage class definition: external storage. This implementation |
| 1375 | // assumes the user will specify a variable to store the data into with the |
| 1376 | // cl::location(x) modifier. |
| 1377 | // |
| 1378 | template <class DataType, class StorageClass> class list_storage { |
| 1379 | StorageClass *Location = nullptr; // Where to store the object... |
| 1380 | |
| 1381 | public: |
| 1382 | list_storage() = default; |
| 1383 | |
| 1384 | bool setLocation(Option &O, StorageClass &L) { |
| 1385 | if (Location) |
| 1386 | return O.error("cl::location(x) specified more than once!"); |
| 1387 | Location = &L; |
| 1388 | return false; |
| 1389 | } |
| 1390 | |
| 1391 | template <class T> void addValue(const T &V) { |
| 1392 | assert(Location != 0 && "cl::location(...) not specified for a command " |
| 1393 | "line option with external storage!"); |
| 1394 | Location->push_back(V); |
| 1395 | } |
| 1396 | }; |
| 1397 | |
| 1398 | // Define how to hold a class type object, such as a string. |
| 1399 | // Originally this code inherited from std::vector. In transitioning to a new |
| 1400 | // API for command line options we should change this. The new implementation |
| 1401 | // of this list_storage specialization implements the minimum subset of the |
| 1402 | // std::vector API required for all the current clients. |
| 1403 | // |
| 1404 | // FIXME: Reduce this API to a more narrow subset of std::vector |
| 1405 | // |
| 1406 | template <class DataType> class list_storage<DataType, bool> { |
| 1407 | std::vector<DataType> Storage; |
| 1408 | |
| 1409 | public: |
| 1410 | using iterator = typename std::vector<DataType>::iterator; |
| 1411 | |
| 1412 | iterator begin() { return Storage.begin(); } |
| 1413 | iterator end() { return Storage.end(); } |
| 1414 | |
| 1415 | using const_iterator = typename std::vector<DataType>::const_iterator; |
| 1416 | |
| 1417 | const_iterator begin() const { return Storage.begin(); } |
| 1418 | const_iterator end() const { return Storage.end(); } |
| 1419 | |
| 1420 | using size_type = typename std::vector<DataType>::size_type; |
| 1421 | |
| 1422 | size_type size() const { return Storage.size(); } |
| 1423 | |
| 1424 | bool empty() const { return Storage.empty(); } |
| 1425 | |
| 1426 | void push_back(const DataType &value) { Storage.push_back(value); } |
| 1427 | void push_back(DataType &&value) { Storage.push_back(value); } |
| 1428 | |
| 1429 | using reference = typename std::vector<DataType>::reference; |
| 1430 | using const_reference = typename std::vector<DataType>::const_reference; |
| 1431 | |
| 1432 | reference operator[](size_type pos) { return Storage[pos]; } |
| 1433 | const_reference operator[](size_type pos) const { return Storage[pos]; } |
| 1434 | |
| 1435 | iterator erase(const_iterator pos) { return Storage.erase(pos); } |
| 1436 | iterator erase(const_iterator first, const_iterator last) { |
| 1437 | return Storage.erase(first, last); |
| 1438 | } |
| 1439 | |
| 1440 | iterator erase(iterator pos) { return Storage.erase(pos); } |
| 1441 | iterator erase(iterator first, iterator last) { |
| 1442 | return Storage.erase(first, last); |
| 1443 | } |
| 1444 | |
| 1445 | iterator insert(const_iterator pos, const DataType &value) { |
| 1446 | return Storage.insert(pos, value); |
| 1447 | } |
| 1448 | iterator insert(const_iterator pos, DataType &&value) { |
| 1449 | return Storage.insert(pos, value); |
| 1450 | } |
| 1451 | |
| 1452 | iterator insert(iterator pos, const DataType &value) { |
| 1453 | return Storage.insert(pos, value); |
| 1454 | } |
| 1455 | iterator insert(iterator pos, DataType &&value) { |
| 1456 | return Storage.insert(pos, value); |
| 1457 | } |
| 1458 | |
| 1459 | reference front() { return Storage.front(); } |
| 1460 | const_reference front() const { return Storage.front(); } |
| 1461 | |
| 1462 | operator std::vector<DataType>&() { return Storage; } |
| 1463 | operator ArrayRef<DataType>() { return Storage; } |
| 1464 | std::vector<DataType> *operator&() { return &Storage; } |
| 1465 | const std::vector<DataType> *operator&() const { return &Storage; } |
| 1466 | |
| 1467 | template <class T> void addValue(const T &V) { Storage.push_back(V); } |
| 1468 | }; |
| 1469 | |
| 1470 | //===----------------------------------------------------------------------===// |
| 1471 | // list - A list of command line options. |
| 1472 | // |
| 1473 | template <class DataType, class StorageClass = bool, |
| 1474 | class ParserClass = parser<DataType>> |
| 1475 | class list : public Option, public list_storage<DataType, StorageClass> { |
| 1476 | std::vector<unsigned> Positions; |
| 1477 | ParserClass Parser; |
| 1478 | |
| 1479 | enum ValueExpected getValueExpectedFlagDefault() const override { |
| 1480 | return Parser.getValueExpectedFlagDefault(); |
| 1481 | } |
| 1482 | |
| 1483 | void getExtraOptionNames(SmallVectorImpl<StringRef> &OptionNames) override { |
| 1484 | return Parser.getExtraOptionNames(OptionNames); |
| 1485 | } |
| 1486 | |
| 1487 | bool handleOccurrence(unsigned pos, StringRef ArgName, |
| 1488 | StringRef Arg) override { |
| 1489 | typename ParserClass::parser_data_type Val = |
| 1490 | typename ParserClass::parser_data_type(); |
| 1491 | if (Parser.parse(*this, ArgName, Arg, Val)) |
| 1492 | return true; // Parse Error! |
| 1493 | list_storage<DataType, StorageClass>::addValue(Val); |
| 1494 | setPosition(pos); |
| 1495 | Positions.push_back(pos); |
| 1496 | return false; |
| 1497 | } |
| 1498 | |
| 1499 | // Forward printing stuff to the parser... |
| 1500 | size_t getOptionWidth() const override { |
| 1501 | return Parser.getOptionWidth(*this); |
| 1502 | } |
| 1503 | |
| 1504 | void printOptionInfo(size_t GlobalWidth) const override { |
| 1505 | Parser.printOptionInfo(*this, GlobalWidth); |
| 1506 | } |
| 1507 | |
| 1508 | // Unimplemented: list options don't currently store their default value. |
| 1509 | void printOptionValue(size_t /*GlobalWidth*/, bool /*Force*/) const override { |
| 1510 | } |
| 1511 | |
| 1512 | void setDefault() override {} |
| 1513 | |
| 1514 | void done() { |
| 1515 | addArgument(); |
| 1516 | Parser.initialize(); |
| 1517 | } |
| 1518 | |
| 1519 | public: |
| 1520 | // Command line options should not be copyable |
| 1521 | list(const list &) = delete; |
| 1522 | list &operator=(const list &) = delete; |
| 1523 | |
| 1524 | ParserClass &getParser() { return Parser; } |
| 1525 | |
| 1526 | unsigned getPosition(unsigned optnum) const { |
| 1527 | assert(optnum < this->size() && "Invalid option index"); |
| 1528 | return Positions[optnum]; |
| 1529 | } |
| 1530 | |
| 1531 | void setNumAdditionalVals(unsigned n) { Option::setNumAdditionalVals(n); } |
| 1532 | |
| 1533 | template <class... Mods> |
| 1534 | explicit list(const Mods &... Ms) |
| 1535 | : Option(ZeroOrMore, NotHidden), Parser(*this) { |
| 1536 | apply(this, Ms...); |
| 1537 | done(); |
| 1538 | } |
| 1539 | }; |
| 1540 | |
| 1541 | // multi_val - Modifier to set the number of additional values. |
| 1542 | struct multi_val { |
| 1543 | unsigned AdditionalVals; |
| 1544 | explicit multi_val(unsigned N) : AdditionalVals(N) {} |
| 1545 | |
| 1546 | template <typename D, typename S, typename P> |
| 1547 | void apply(list<D, S, P> &L) const { |
| 1548 | L.setNumAdditionalVals(AdditionalVals); |
| 1549 | } |
| 1550 | }; |
| 1551 | |
| 1552 | //===----------------------------------------------------------------------===// |
| 1553 | // bits_storage class |
| 1554 | |
| 1555 | // Default storage class definition: external storage. This implementation |
| 1556 | // assumes the user will specify a variable to store the data into with the |
| 1557 | // cl::location(x) modifier. |
| 1558 | // |
| 1559 | template <class DataType, class StorageClass> class bits_storage { |
| 1560 | unsigned *Location = nullptr; // Where to store the bits... |
| 1561 | |
| 1562 | template <class T> static unsigned Bit(const T &V) { |
| 1563 | unsigned BitPos = reinterpret_cast<unsigned>(V); |
| 1564 | assert(BitPos < sizeof(unsigned) * CHAR_BIT && |
| 1565 | "enum exceeds width of bit vector!"); |
| 1566 | return 1 << BitPos; |
| 1567 | } |
| 1568 | |
| 1569 | public: |
| 1570 | bits_storage() = default; |
| 1571 | |
| 1572 | bool setLocation(Option &O, unsigned &L) { |
| 1573 | if (Location) |
| 1574 | return O.error("cl::location(x) specified more than once!"); |
| 1575 | Location = &L; |
| 1576 | return false; |
| 1577 | } |
| 1578 | |
| 1579 | template <class T> void addValue(const T &V) { |
| 1580 | assert(Location != 0 && "cl::location(...) not specified for a command " |
| 1581 | "line option with external storage!"); |
| 1582 | *Location |= Bit(V); |
| 1583 | } |
| 1584 | |
| 1585 | unsigned getBits() { return *Location; } |
| 1586 | |
| 1587 | template <class T> bool isSet(const T &V) { |
| 1588 | return (*Location & Bit(V)) != 0; |
| 1589 | } |
| 1590 | }; |
| 1591 | |
| 1592 | // Define how to hold bits. Since we can inherit from a class, we do so. |
| 1593 | // This makes us exactly compatible with the bits in all cases that it is used. |
| 1594 | // |
| 1595 | template <class DataType> class bits_storage<DataType, bool> { |
| 1596 | unsigned Bits; // Where to store the bits... |
| 1597 | |
| 1598 | template <class T> static unsigned Bit(const T &V) { |
| 1599 | unsigned BitPos = (unsigned)V; |
| 1600 | assert(BitPos < sizeof(unsigned) * CHAR_BIT && |
| 1601 | "enum exceeds width of bit vector!"); |
| 1602 | return 1 << BitPos; |
| 1603 | } |
| 1604 | |
| 1605 | public: |
| 1606 | template <class T> void addValue(const T &V) { Bits |= Bit(V); } |
| 1607 | |
| 1608 | unsigned getBits() { return Bits; } |
| 1609 | |
| 1610 | template <class T> bool isSet(const T &V) { return (Bits & Bit(V)) != 0; } |
| 1611 | }; |
| 1612 | |
| 1613 | //===----------------------------------------------------------------------===// |
| 1614 | // bits - A bit vector of command options. |
| 1615 | // |
| 1616 | template <class DataType, class Storage = bool, |
| 1617 | class ParserClass = parser<DataType>> |
| 1618 | class bits : public Option, public bits_storage<DataType, Storage> { |
| 1619 | std::vector<unsigned> Positions; |
| 1620 | ParserClass Parser; |
| 1621 | |
| 1622 | enum ValueExpected getValueExpectedFlagDefault() const override { |
| 1623 | return Parser.getValueExpectedFlagDefault(); |
| 1624 | } |
| 1625 | |
| 1626 | void getExtraOptionNames(SmallVectorImpl<StringRef> &OptionNames) override { |
| 1627 | return Parser.getExtraOptionNames(OptionNames); |
| 1628 | } |
| 1629 | |
| 1630 | bool handleOccurrence(unsigned pos, StringRef ArgName, |
| 1631 | StringRef Arg) override { |
| 1632 | typename ParserClass::parser_data_type Val = |
| 1633 | typename ParserClass::parser_data_type(); |
| 1634 | if (Parser.parse(*this, ArgName, Arg, Val)) |
| 1635 | return true; // Parse Error! |
| 1636 | this->addValue(Val); |
| 1637 | setPosition(pos); |
| 1638 | Positions.push_back(pos); |
| 1639 | return false; |
| 1640 | } |
| 1641 | |
| 1642 | // Forward printing stuff to the parser... |
| 1643 | size_t getOptionWidth() const override { |
| 1644 | return Parser.getOptionWidth(*this); |
| 1645 | } |
| 1646 | |
| 1647 | void printOptionInfo(size_t GlobalWidth) const override { |
| 1648 | Parser.printOptionInfo(*this, GlobalWidth); |
| 1649 | } |
| 1650 | |
| 1651 | // Unimplemented: bits options don't currently store their default values. |
| 1652 | void printOptionValue(size_t /*GlobalWidth*/, bool /*Force*/) const override { |
| 1653 | } |
| 1654 | |
| 1655 | void setDefault() override {} |
| 1656 | |
| 1657 | void done() { |
| 1658 | addArgument(); |
| 1659 | Parser.initialize(); |
| 1660 | } |
| 1661 | |
| 1662 | public: |
| 1663 | // Command line options should not be copyable |
| 1664 | bits(const bits &) = delete; |
| 1665 | bits &operator=(const bits &) = delete; |
| 1666 | |
| 1667 | ParserClass &getParser() { return Parser; } |
| 1668 | |
| 1669 | unsigned getPosition(unsigned optnum) const { |
| 1670 | assert(optnum < this->size() && "Invalid option index"); |
| 1671 | return Positions[optnum]; |
| 1672 | } |
| 1673 | |
| 1674 | template <class... Mods> |
| 1675 | explicit bits(const Mods &... Ms) |
| 1676 | : Option(ZeroOrMore, NotHidden), Parser(*this) { |
| 1677 | apply(this, Ms...); |
| 1678 | done(); |
| 1679 | } |
| 1680 | }; |
| 1681 | |
| 1682 | //===----------------------------------------------------------------------===// |
| 1683 | // Aliased command line option (alias this name to a preexisting name) |
| 1684 | // |
| 1685 | |
| 1686 | class alias : public Option { |
| 1687 | Option *AliasFor; |
| 1688 | |
| 1689 | bool handleOccurrence(unsigned pos, StringRef /*ArgName*/, |
| 1690 | StringRef Arg) override { |
| 1691 | return AliasFor->handleOccurrence(pos, AliasFor->ArgStr, Arg); |
| 1692 | } |
| 1693 | |
| 1694 | bool addOccurrence(unsigned pos, StringRef /*ArgName*/, StringRef Value, |
| 1695 | bool MultiArg = false) override { |
| 1696 | return AliasFor->addOccurrence(pos, AliasFor->ArgStr, Value, MultiArg); |
| 1697 | } |
| 1698 | |
| 1699 | // Handle printing stuff... |
| 1700 | size_t getOptionWidth() const override; |
| 1701 | void printOptionInfo(size_t GlobalWidth) const override; |
| 1702 | |
| 1703 | // Aliases do not need to print their values. |
| 1704 | void printOptionValue(size_t /*GlobalWidth*/, bool /*Force*/) const override { |
| 1705 | } |
| 1706 | |
| 1707 | void setDefault() override { AliasFor->setDefault(); } |
| 1708 | |
| 1709 | ValueExpected getValueExpectedFlagDefault() const override { |
| 1710 | return AliasFor->getValueExpectedFlag(); |
| 1711 | } |
| 1712 | |
| 1713 | void done() { |
| 1714 | if (!hasArgStr()) |
| 1715 | error("cl::alias must have argument name specified!"); |
| 1716 | if (!AliasFor) |
| 1717 | error("cl::alias must have an cl::aliasopt(option) specified!"); |
| 1718 | Subs = AliasFor->Subs; |
| 1719 | addArgument(); |
| 1720 | } |
| 1721 | |
| 1722 | public: |
| 1723 | // Command line options should not be copyable |
| 1724 | alias(const alias &) = delete; |
| 1725 | alias &operator=(const alias &) = delete; |
| 1726 | |
| 1727 | void setAliasFor(Option &O) { |
| 1728 | if (AliasFor) |
| 1729 | error("cl::alias must only have one cl::aliasopt(...) specified!"); |
| 1730 | AliasFor = &O; |
| 1731 | } |
| 1732 | |
| 1733 | template <class... Mods> |
| 1734 | explicit alias(const Mods &... Ms) |
| 1735 | : Option(Optional, Hidden), AliasFor(nullptr) { |
| 1736 | apply(this, Ms...); |
| 1737 | done(); |
| 1738 | } |
| 1739 | }; |
| 1740 | |
| 1741 | // aliasfor - Modifier to set the option an alias aliases. |
| 1742 | struct aliasopt { |
| 1743 | Option &Opt; |
| 1744 | |
| 1745 | explicit aliasopt(Option &O) : Opt(O) {} |
| 1746 | |
| 1747 | void apply(alias &A) const { A.setAliasFor(Opt); } |
| 1748 | }; |
| 1749 | |
| 1750 | // extrahelp - provide additional help at the end of the normal help |
| 1751 | // output. All occurrences of cl::extrahelp will be accumulated and |
| 1752 | // printed to stderr at the end of the regular help, just before |
| 1753 | // exit is called. |
| 1754 | struct extrahelp { |
| 1755 | StringRef morehelp; |
| 1756 | |
| 1757 | explicit extrahelp(StringRef help); |
| 1758 | }; |
| 1759 | |
| 1760 | void PrintVersionMessage(); |
| 1761 | |
| 1762 | /// This function just prints the help message, exactly the same way as if the |
| 1763 | /// -help or -help-hidden option had been given on the command line. |
| 1764 | /// |
| 1765 | /// \param Hidden if true will print hidden options |
| 1766 | /// \param Categorized if true print options in categories |
| 1767 | void PrintHelpMessage(bool Hidden = false, bool Categorized = false); |
| 1768 | |
| 1769 | //===----------------------------------------------------------------------===// |
| 1770 | // Public interface for accessing registered options. |
| 1771 | // |
| 1772 | |
| 1773 | /// \brief Use this to get a StringMap to all registered named options |
| 1774 | /// (e.g. -help). Note \p Map Should be an empty StringMap. |
| 1775 | /// |
| 1776 | /// \return A reference to the StringMap used by the cl APIs to parse options. |
| 1777 | /// |
| 1778 | /// Access to unnamed arguments (i.e. positional) are not provided because |
| 1779 | /// it is expected that the client already has access to these. |
| 1780 | /// |
| 1781 | /// Typical usage: |
| 1782 | /// \code |
| 1783 | /// main(int argc,char* argv[]) { |
| 1784 | /// StringMap<llvm::cl::Option*> &opts = llvm::cl::getRegisteredOptions(); |
| 1785 | /// assert(opts.count("help") == 1) |
| 1786 | /// opts["help"]->setDescription("Show alphabetical help information") |
| 1787 | /// // More code |
| 1788 | /// llvm::cl::ParseCommandLineOptions(argc,argv); |
| 1789 | /// //More code |
| 1790 | /// } |
| 1791 | /// \endcode |
| 1792 | /// |
| 1793 | /// This interface is useful for modifying options in libraries that are out of |
| 1794 | /// the control of the client. The options should be modified before calling |
| 1795 | /// llvm::cl::ParseCommandLineOptions(). |
| 1796 | /// |
| 1797 | /// Hopefully this API can be deprecated soon. Any situation where options need |
| 1798 | /// to be modified by tools or libraries should be handled by sane APIs rather |
| 1799 | /// than just handing around a global list. |
| 1800 | StringMap<Option *> &getRegisteredOptions(SubCommand &Sub = *TopLevelSubCommand); |
| 1801 | |
| 1802 | /// \brief Use this to get all registered SubCommands from the provided parser. |
| 1803 | /// |
| 1804 | /// \return A range of all SubCommand pointers registered with the parser. |
| 1805 | /// |
| 1806 | /// Typical usage: |
| 1807 | /// \code |
| 1808 | /// main(int argc, char* argv[]) { |
| 1809 | /// llvm::cl::ParseCommandLineOptions(argc, argv); |
| 1810 | /// for (auto* S : llvm::cl::getRegisteredSubcommands()) { |
| 1811 | /// if (*S) { |
| 1812 | /// std::cout << "Executing subcommand: " << S->getName() << std::endl; |
| 1813 | /// // Execute some function based on the name... |
| 1814 | /// } |
| 1815 | /// } |
| 1816 | /// } |
| 1817 | /// \endcode |
| 1818 | /// |
| 1819 | /// This interface is useful for defining subcommands in libraries and |
| 1820 | /// the dispatch from a single point (like in the main function). |
| 1821 | iterator_range<typename SmallPtrSet<SubCommand *, 4>::iterator> |
| 1822 | getRegisteredSubcommands(); |
| 1823 | |
| 1824 | //===----------------------------------------------------------------------===// |
| 1825 | // Standalone command line processing utilities. |
| 1826 | // |
| 1827 | |
| 1828 | /// \brief Tokenizes a command line that can contain escapes and quotes. |
| 1829 | // |
| 1830 | /// The quoting rules match those used by GCC and other tools that use |
| 1831 | /// libiberty's buildargv() or expandargv() utilities, and do not match bash. |
| 1832 | /// They differ from buildargv() on treatment of backslashes that do not escape |
| 1833 | /// a special character to make it possible to accept most Windows file paths. |
| 1834 | /// |
| 1835 | /// \param [in] Source The string to be split on whitespace with quotes. |
| 1836 | /// \param [in] Saver Delegates back to the caller for saving parsed strings. |
| 1837 | /// \param [in] MarkEOLs true if tokenizing a response file and you want end of |
| 1838 | /// lines and end of the response file to be marked with a nullptr string. |
| 1839 | /// \param [out] NewArgv All parsed strings are appended to NewArgv. |
| 1840 | void TokenizeGNUCommandLine(StringRef Source, StringSaver &Saver, |
| 1841 | SmallVectorImpl<const char *> &NewArgv, |
| 1842 | bool MarkEOLs = false); |
| 1843 | |
| 1844 | /// \brief Tokenizes a Windows command line which may contain quotes and escaped |
| 1845 | /// quotes. |
| 1846 | /// |
| 1847 | /// See MSDN docs for CommandLineToArgvW for information on the quoting rules. |
| 1848 | /// http://msdn.microsoft.com/en-us/library/windows/desktop/17w5ykft(v=vs.85).aspx |
| 1849 | /// |
| 1850 | /// \param [in] Source The string to be split on whitespace with quotes. |
| 1851 | /// \param [in] Saver Delegates back to the caller for saving parsed strings. |
| 1852 | /// \param [in] MarkEOLs true if tokenizing a response file and you want end of |
| 1853 | /// lines and end of the response file to be marked with a nullptr string. |
| 1854 | /// \param [out] NewArgv All parsed strings are appended to NewArgv. |
| 1855 | void TokenizeWindowsCommandLine(StringRef Source, StringSaver &Saver, |
| 1856 | SmallVectorImpl<const char *> &NewArgv, |
| 1857 | bool MarkEOLs = false); |
| 1858 | |
| 1859 | /// \brief String tokenization function type. Should be compatible with either |
| 1860 | /// Windows or Unix command line tokenizers. |
| 1861 | using TokenizerCallback = void (*)(StringRef Source, StringSaver &Saver, |
| 1862 | SmallVectorImpl<const char *> &NewArgv, |
| 1863 | bool MarkEOLs); |
| 1864 | |
| 1865 | /// Tokenizes content of configuration file. |
| 1866 | /// |
| 1867 | /// \param [in] Source The string representing content of config file. |
| 1868 | /// \param [in] Saver Delegates back to the caller for saving parsed strings. |
| 1869 | /// \param [out] NewArgv All parsed strings are appended to NewArgv. |
| 1870 | /// \param [in] MarkEOLs Added for compatibility with TokenizerCallback. |
| 1871 | /// |
| 1872 | /// It works like TokenizeGNUCommandLine with ability to skip comment lines. |
| 1873 | /// |
| 1874 | void tokenizeConfigFile(StringRef Source, StringSaver &Saver, |
| 1875 | SmallVectorImpl<const char *> &NewArgv, |
| 1876 | bool MarkEOLs = false); |
| 1877 | |
| 1878 | /// Reads command line options from the given configuration file. |
| 1879 | /// |
| 1880 | /// \param [in] CfgFileName Path to configuration file. |
| 1881 | /// \param [in] Saver Objects that saves allocated strings. |
| 1882 | /// \param [out] Argv Array to which the read options are added. |
| 1883 | /// \return true if the file was successfully read. |
| 1884 | /// |
| 1885 | /// It reads content of the specified file, tokenizes it and expands "@file" |
| 1886 | /// commands resolving file names in them relative to the directory where |
| 1887 | /// CfgFilename resides. |
| 1888 | /// |
| 1889 | bool readConfigFile(StringRef CfgFileName, StringSaver &Saver, |
| 1890 | SmallVectorImpl<const char *> &Argv); |
| 1891 | |
| 1892 | /// \brief Expand response files on a command line recursively using the given |
| 1893 | /// StringSaver and tokenization strategy. Argv should contain the command line |
| 1894 | /// before expansion and will be modified in place. If requested, Argv will |
| 1895 | /// also be populated with nullptrs indicating where each response file line |
| 1896 | /// ends, which is useful for the "/link" argument that needs to consume all |
| 1897 | /// remaining arguments only until the next end of line, when in a response |
| 1898 | /// file. |
| 1899 | /// |
| 1900 | /// \param [in] Saver Delegates back to the caller for saving parsed strings. |
| 1901 | /// \param [in] Tokenizer Tokenization strategy. Typically Unix or Windows. |
| 1902 | /// \param [in,out] Argv Command line into which to expand response files. |
| 1903 | /// \param [in] MarkEOLs Mark end of lines and the end of the response file |
| 1904 | /// with nullptrs in the Argv vector. |
| 1905 | /// \param [in] RelativeNames true if names of nested response files must be |
| 1906 | /// resolved relative to including file. |
| 1907 | /// \return true if all @files were expanded successfully or there were none. |
| 1908 | bool ExpandResponseFiles(StringSaver &Saver, TokenizerCallback Tokenizer, |
| 1909 | SmallVectorImpl<const char *> &Argv, |
| 1910 | bool MarkEOLs = false, bool RelativeNames = false); |
| 1911 | |
| 1912 | /// \brief Mark all options not part of this category as cl::ReallyHidden. |
| 1913 | /// |
| 1914 | /// \param Category the category of options to keep displaying |
| 1915 | /// |
| 1916 | /// Some tools (like clang-format) like to be able to hide all options that are |
| 1917 | /// not specific to the tool. This function allows a tool to specify a single |
| 1918 | /// option category to display in the -help output. |
| 1919 | void HideUnrelatedOptions(cl::OptionCategory &Category, |
| 1920 | SubCommand &Sub = *TopLevelSubCommand); |
| 1921 | |
| 1922 | /// \brief Mark all options not part of the categories as cl::ReallyHidden. |
| 1923 | /// |
| 1924 | /// \param Categories the categories of options to keep displaying. |
| 1925 | /// |
| 1926 | /// Some tools (like clang-format) like to be able to hide all options that are |
| 1927 | /// not specific to the tool. This function allows a tool to specify a single |
| 1928 | /// option category to display in the -help output. |
| 1929 | void HideUnrelatedOptions(ArrayRef<const cl::OptionCategory *> Categories, |
| 1930 | SubCommand &Sub = *TopLevelSubCommand); |
| 1931 | |
| 1932 | /// \brief Reset all command line options to a state that looks as if they have |
| 1933 | /// never appeared on the command line. This is useful for being able to parse |
| 1934 | /// a command line multiple times (especially useful for writing tests). |
| 1935 | void ResetAllOptionOccurrences(); |
| 1936 | |
| 1937 | /// \brief Reset the command line parser back to its initial state. This |
| 1938 | /// removes |
| 1939 | /// all options, categories, and subcommands and returns the parser to a state |
| 1940 | /// where no options are supported. |
| 1941 | void ResetCommandLineParser(); |
| 1942 | |
| 1943 | } // end namespace cl |
| 1944 | |
| 1945 | } // end namespace llvm |
| 1946 | |
| 1947 | #endif // LLVM_SUPPORT_COMMANDLINE_H |