CommandLine.h revision e8b64106ecf1057c7506d44ec8f64b5c83ee51c7
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/Support/type_traits.h" 24#include "llvm/Support/DataTypes.h" 25#include "llvm/Support/Compiler.h" 26#include "llvm/ADT/SmallVector.h" 27#include <cassert> 28#include <cstdarg> 29#include <string> 30#include <utility> 31#include <vector> 32 33namespace llvm { 34 35/// cl Namespace - This namespace contains all of the command line option 36/// processing machinery. It is intentionally a short name to make qualified 37/// usage concise. 38namespace cl { 39 40//===----------------------------------------------------------------------===// 41// ParseCommandLineOptions - Command line option processing entry point. 42// 43void ParseCommandLineOptions(int argc, char **argv, 44 const char *Overview = 0, 45 bool ReadResponseFiles = false); 46 47//===----------------------------------------------------------------------===// 48// ParseEnvironmentOptions - Environment variable option processing alternate 49// entry point. 50// 51void ParseEnvironmentOptions(const char *progName, const char *envvar, 52 const char *Overview = 0, 53 bool ReadResponseFiles = false); 54 55///===---------------------------------------------------------------------===// 56/// SetVersionPrinter - Override the default (LLVM specific) version printer 57/// used to print out the version when --version is given 58/// on the command line. This allows other systems using the 59/// CommandLine utilities to print their own version string. 60void SetVersionPrinter(void (*func)()); 61 62 63// MarkOptionsChanged - Internal helper function. 64void MarkOptionsChanged(); 65 66//===----------------------------------------------------------------------===// 67// Flags permitted to be passed to command line arguments 68// 69 70enum NumOccurrences { // Flags for the number of occurrences allowed 71 Optional = 0x01, // Zero or One occurrence 72 ZeroOrMore = 0x02, // Zero or more occurrences allowed 73 Required = 0x03, // One occurrence required 74 OneOrMore = 0x04, // One or more occurrences required 75 76 // ConsumeAfter - Indicates that this option is fed anything that follows the 77 // last positional argument required by the application (it is an error if 78 // there are zero positional arguments, and a ConsumeAfter option is used). 79 // Thus, for example, all arguments to LLI are processed until a filename is 80 // found. Once a filename is found, all of the succeeding arguments are 81 // passed, unprocessed, to the ConsumeAfter option. 82 // 83 ConsumeAfter = 0x05, 84 85 OccurrencesMask = 0x07 86}; 87 88enum ValueExpected { // Is a value required for the option? 89 ValueOptional = 0x08, // The value can appear... or not 90 ValueRequired = 0x10, // The value is required to appear! 91 ValueDisallowed = 0x18, // A value may not be specified (for flags) 92 ValueMask = 0x18 93}; 94 95enum OptionHidden { // Control whether -help shows this option 96 NotHidden = 0x20, // Option included in --help & --help-hidden 97 Hidden = 0x40, // -help doesn't, but --help-hidden does 98 ReallyHidden = 0x60, // Neither --help nor --help-hidden show this arg 99 HiddenMask = 0x60 100}; 101 102// Formatting flags - This controls special features that the option might have 103// that cause it to be parsed differently... 104// 105// Prefix - This option allows arguments that are otherwise unrecognized to be 106// matched by options that are a prefix of the actual value. This is useful for 107// cases like a linker, where options are typically of the form '-lfoo' or 108// '-L../../include' where -l or -L are the actual flags. When prefix is 109// enabled, and used, the value for the flag comes from the suffix of the 110// argument. 111// 112// Grouping - With this option enabled, multiple letter options are allowed to 113// bunch together with only a single hyphen for the whole group. This allows 114// emulation of the behavior that ls uses for example: ls -la === ls -l -a 115// 116 117enum FormattingFlags { 118 NormalFormatting = 0x000, // Nothing special 119 Positional = 0x080, // Is a positional argument, no '-' required 120 Prefix = 0x100, // Can this option directly prefix its value? 121 Grouping = 0x180, // Can this option group with other options? 122 FormattingMask = 0x180 // Union of the above flags. 123}; 124 125enum MiscFlags { // Miscellaneous flags to adjust argument 126 CommaSeparated = 0x200, // Should this cl::list split between commas? 127 PositionalEatsArgs = 0x400, // Should this positional cl::list eat -args? 128 Sink = 0x800, // Should this cl::list eat all unknown options? 129 AllowInverse = 0x1000, // Can this option take a -Xno- form? 130 MiscMask = 0x1E00 // Union of the above flags. 131}; 132 133 134 135//===----------------------------------------------------------------------===// 136// Option Base class 137// 138class alias; 139class Option { 140 friend class alias; 141 142 // handleOccurrences - Overriden by subclasses to handle the value passed into 143 // an argument. Should return true if there was an error processing the 144 // argument and the program should exit. 145 // 146 virtual bool handleOccurrence(unsigned pos, const char *ArgName, 147 const std::string &Arg) = 0; 148 149 virtual enum ValueExpected getValueExpectedFlagDefault() const { 150 return ValueOptional; 151 } 152 153 // Out of line virtual function to provide home for the class. 154 virtual void anchor(); 155 156 int NumOccurrences; // The number of times specified 157 int Flags; // Flags for the argument 158 unsigned Position; // Position of last occurrence of the option 159 unsigned AdditionalVals;// Greater than 0 for multi-valued option. 160 Option *NextRegistered; // Singly linked list of registered options. 161public: 162 const char *ArgStr; // The argument string itself (ex: "help", "o") 163 const char *HelpStr; // The descriptive text message for --help 164 const char *ValueStr; // String describing what the value of this option is 165 166 inline enum NumOccurrences getNumOccurrencesFlag() const { 167 return static_cast<enum NumOccurrences>(Flags & OccurrencesMask); 168 } 169 inline enum ValueExpected getValueExpectedFlag() const { 170 int VE = Flags & ValueMask; 171 return VE ? static_cast<enum ValueExpected>(VE) 172 : getValueExpectedFlagDefault(); 173 } 174 inline enum OptionHidden getOptionHiddenFlag() const { 175 return static_cast<enum OptionHidden>(Flags & HiddenMask); 176 } 177 inline enum FormattingFlags getFormattingFlag() const { 178 return static_cast<enum FormattingFlags>(Flags & FormattingMask); 179 } 180 inline unsigned getMiscFlags() const { 181 return Flags & MiscMask; 182 } 183 inline unsigned getPosition() const { return Position; } 184 inline unsigned getNumAdditionalVals() const { return AdditionalVals; } 185 186 // hasArgStr - Return true if the argstr != "" 187 bool hasArgStr() const { return ArgStr[0] != 0; } 188 189 //-------------------------------------------------------------------------=== 190 // Accessor functions set by OptionModifiers 191 // 192 void setArgStr(const char *S) { ArgStr = S; } 193 void setDescription(const char *S) { HelpStr = S; } 194 void setValueStr(const char *S) { ValueStr = S; } 195 196 void setFlag(unsigned Flag, unsigned FlagMask) { 197 Flags &= ~FlagMask; 198 Flags |= Flag; 199 } 200 201 void setNumOccurrencesFlag(enum NumOccurrences Val) { 202 setFlag(Val, OccurrencesMask); 203 } 204 void setValueExpectedFlag(enum ValueExpected Val) { setFlag(Val, ValueMask); } 205 void setHiddenFlag(enum OptionHidden Val) { setFlag(Val, HiddenMask); } 206 void setFormattingFlag(enum FormattingFlags V) { setFlag(V, FormattingMask); } 207 void setMiscFlag(enum MiscFlags M) { setFlag(M, M); } 208 void setPosition(unsigned pos) { Position = pos; } 209protected: 210 explicit Option(unsigned DefaultFlags) 211 : NumOccurrences(0), Flags(DefaultFlags | NormalFormatting), Position(0), 212 AdditionalVals(0), NextRegistered(0), 213 ArgStr(""), HelpStr(""), ValueStr("") { 214 assert(getNumOccurrencesFlag() != 0 && 215 getOptionHiddenFlag() != 0 && "Not all default flags specified!"); 216 } 217 218 inline void setNumAdditionalVals(unsigned n) 219 { AdditionalVals = n; } 220public: 221 // addArgument - Register this argument with the commandline system. 222 // 223 void addArgument(); 224 225 Option *getNextRegisteredOption() const { return NextRegistered; } 226 227 // Return the width of the option tag for printing... 228 virtual size_t getOptionWidth() const = 0; 229 230 // printOptionInfo - Print out information about this option. The 231 // to-be-maintained width is specified. 232 // 233 virtual void printOptionInfo(size_t GlobalWidth) const = 0; 234 235 virtual void getExtraOptionNames(std::vector<const char*> &) {} 236 237 // addOccurrence - Wrapper around handleOccurrence that enforces Flags 238 // 239 bool addOccurrence(unsigned pos, const char *ArgName, 240 const std::string &Value, bool MultiArg = false); 241 242 // Prints option name followed by message. Always returns true. 243 bool error(std::string Message, const char *ArgName = 0); 244 245public: 246 inline int getNumOccurrences() const { return NumOccurrences; } 247 virtual ~Option() {} 248}; 249 250 251//===----------------------------------------------------------------------===// 252// Command line option modifiers that can be used to modify the behavior of 253// command line option parsers... 254// 255 256// desc - Modifier to set the description shown in the --help output... 257struct desc { 258 const char *Desc; 259 desc(const char *Str) : Desc(Str) {} 260 void apply(Option &O) const { O.setDescription(Desc); } 261}; 262 263// value_desc - Modifier to set the value description shown in the --help 264// output... 265struct value_desc { 266 const char *Desc; 267 value_desc(const char *Str) : Desc(Str) {} 268 void apply(Option &O) const { O.setValueStr(Desc); } 269}; 270 271// init - Specify a default (initial) value for the command line argument, if 272// the default constructor for the argument type does not give you what you 273// want. This is only valid on "opt" arguments, not on "list" arguments. 274// 275template<class Ty> 276struct initializer { 277 const Ty &Init; 278 initializer(const Ty &Val) : Init(Val) {} 279 280 template<class Opt> 281 void apply(Opt &O) const { O.setInitialValue(Init); } 282}; 283 284template<class Ty> 285initializer<Ty> init(const Ty &Val) { 286 return initializer<Ty>(Val); 287} 288 289 290// location - Allow the user to specify which external variable they want to 291// store the results of the command line argument processing into, if they don't 292// want to store it in the option itself. 293// 294template<class Ty> 295struct LocationClass { 296 Ty &Loc; 297 LocationClass(Ty &L) : Loc(L) {} 298 299 template<class Opt> 300 void apply(Opt &O) const { O.setLocation(O, Loc); } 301}; 302 303template<class Ty> 304LocationClass<Ty> location(Ty &L) { return LocationClass<Ty>(L); } 305 306 307//===----------------------------------------------------------------------===// 308// Enum valued command line option 309// 310#define clEnumVal(ENUMVAL, DESC) #ENUMVAL, int(ENUMVAL), DESC 311#define clEnumValN(ENUMVAL, FLAGNAME, DESC) FLAGNAME, int(ENUMVAL), DESC 312#define clEnumValEnd (reinterpret_cast<void*>(0)) 313 314// values - For custom data types, allow specifying a group of values together 315// as the values that go into the mapping that the option handler uses. Note 316// that the values list must always have a 0 at the end of the list to indicate 317// that the list has ended. 318// 319template<class DataType> 320class ValuesClass { 321 // Use a vector instead of a map, because the lists should be short, 322 // the overhead is less, and most importantly, it keeps them in the order 323 // inserted so we can print our option out nicely. 324 SmallVector<std::pair<const char *, std::pair<int, const char *> >,4> Values; 325 void processValues(va_list Vals); 326public: 327 ValuesClass(const char *EnumName, DataType Val, const char *Desc, 328 va_list ValueArgs) { 329 // Insert the first value, which is required. 330 Values.push_back(std::make_pair(EnumName, std::make_pair(Val, Desc))); 331 332 // Process the varargs portion of the values... 333 while (const char *enumName = va_arg(ValueArgs, const char *)) { 334 DataType EnumVal = static_cast<DataType>(va_arg(ValueArgs, int)); 335 const char *EnumDesc = va_arg(ValueArgs, const char *); 336 Values.push_back(std::make_pair(enumName, // Add value to value map 337 std::make_pair(EnumVal, EnumDesc))); 338 } 339 } 340 341 template<class Opt> 342 void apply(Opt &O) const { 343 for (unsigned i = 0, e = static_cast<unsigned>(Values.size()); 344 i != e; ++i) 345 O.getParser().addLiteralOption(Values[i].first, Values[i].second.first, 346 Values[i].second.second); 347 } 348}; 349 350template<class DataType> 351ValuesClass<DataType> END_WITH_NULL values(const char *Arg, DataType Val, 352 const char *Desc, ...) { 353 va_list ValueArgs; 354 va_start(ValueArgs, Desc); 355 ValuesClass<DataType> Vals(Arg, Val, Desc, ValueArgs); 356 va_end(ValueArgs); 357 return Vals; 358} 359 360 361//===----------------------------------------------------------------------===// 362// parser class - Parameterizable parser for different data types. By default, 363// known data types (string, int, bool) have specialized parsers, that do what 364// you would expect. The default parser, used for data types that are not 365// built-in, uses a mapping table to map specific options to values, which is 366// used, among other things, to handle enum types. 367 368//-------------------------------------------------- 369// generic_parser_base - This class holds all the non-generic code that we do 370// not need replicated for every instance of the generic parser. This also 371// allows us to put stuff into CommandLine.cpp 372// 373struct generic_parser_base { 374 virtual ~generic_parser_base() {} // Base class should have virtual-dtor 375 376 // getNumOptions - Virtual function implemented by generic subclass to 377 // indicate how many entries are in Values. 378 // 379 virtual unsigned getNumOptions() const = 0; 380 381 // getOption - Return option name N. 382 virtual const char *getOption(unsigned N) const = 0; 383 384 // getDescription - Return description N 385 virtual const char *getDescription(unsigned N) const = 0; 386 387 // Return the width of the option tag for printing... 388 virtual size_t getOptionWidth(const Option &O) const; 389 390 // printOptionInfo - Print out information about this option. The 391 // to-be-maintained width is specified. 392 // 393 virtual void printOptionInfo(const Option &O, size_t GlobalWidth) const; 394 395 void initialize(Option &O) { 396 // All of the modifiers for the option have been processed by now, so the 397 // argstr field should be stable, copy it down now. 398 // 399 hasArgStr = O.hasArgStr(); 400 } 401 402 void getExtraOptionNames(std::vector<const char*> &OptionNames) { 403 // If there has been no argstr specified, that means that we need to add an 404 // argument for every possible option. This ensures that our options are 405 // vectored to us. 406 if (!hasArgStr) 407 for (unsigned i = 0, e = getNumOptions(); i != e; ++i) 408 OptionNames.push_back(getOption(i)); 409 } 410 411 412 enum ValueExpected getValueExpectedFlagDefault() const { 413 // If there is an ArgStr specified, then we are of the form: 414 // 415 // -opt=O2 or -opt O2 or -optO2 416 // 417 // In which case, the value is required. Otherwise if an arg str has not 418 // been specified, we are of the form: 419 // 420 // -O2 or O2 or -la (where -l and -a are separate options) 421 // 422 // If this is the case, we cannot allow a value. 423 // 424 if (hasArgStr) 425 return ValueRequired; 426 else 427 return ValueDisallowed; 428 } 429 430 // findOption - Return the option number corresponding to the specified 431 // argument string. If the option is not found, getNumOptions() is returned. 432 // 433 unsigned findOption(const char *Name); 434 435protected: 436 bool hasArgStr; 437}; 438 439// Default parser implementation - This implementation depends on having a 440// mapping of recognized options to values of some sort. In addition to this, 441// each entry in the mapping also tracks a help message that is printed with the 442// command line option for --help. Because this is a simple mapping parser, the 443// data type can be any unsupported type. 444// 445template <class DataType> 446class parser : public generic_parser_base { 447protected: 448 SmallVector<std::pair<const char *, 449 std::pair<DataType, const char *> >, 8> Values; 450public: 451 typedef DataType parser_data_type; 452 453 // Implement virtual functions needed by generic_parser_base 454 unsigned getNumOptions() const { return unsigned(Values.size()); } 455 const char *getOption(unsigned N) const { return Values[N].first; } 456 const char *getDescription(unsigned N) const { 457 return Values[N].second.second; 458 } 459 460 // parse - Return true on error. 461 bool parse(Option &O, const char *ArgName, const std::string &Arg, 462 DataType &V) { 463 std::string ArgVal; 464 if (hasArgStr) 465 ArgVal = Arg; 466 else 467 ArgVal = ArgName; 468 469 for (unsigned i = 0, e = static_cast<unsigned>(Values.size()); 470 i != e; ++i) 471 if (ArgVal == Values[i].first) { 472 V = Values[i].second.first; 473 return false; 474 } 475 476 return O.error(": Cannot find option named '" + ArgVal + "'!"); 477 } 478 479 /// addLiteralOption - Add an entry to the mapping table. 480 /// 481 template <class DT> 482 void addLiteralOption(const char *Name, const DT &V, const char *HelpStr) { 483 assert(findOption(Name) == Values.size() && "Option already exists!"); 484 Values.push_back(std::make_pair(Name, 485 std::make_pair(static_cast<DataType>(V),HelpStr))); 486 MarkOptionsChanged(); 487 } 488 489 /// removeLiteralOption - Remove the specified option. 490 /// 491 void removeLiteralOption(const char *Name) { 492 unsigned N = findOption(Name); 493 assert(N != Values.size() && "Option not found!"); 494 Values.erase(Values.begin()+N); 495 } 496}; 497 498//-------------------------------------------------- 499// basic_parser - Super class of parsers to provide boilerplate code 500// 501struct basic_parser_impl { // non-template implementation of basic_parser<t> 502 virtual ~basic_parser_impl() {} 503 504 enum ValueExpected getValueExpectedFlagDefault() const { 505 return ValueRequired; 506 } 507 508 void getExtraOptionNames(std::vector<const char*> &) {} 509 510 void initialize(Option &) {} 511 512 // Return the width of the option tag for printing... 513 size_t getOptionWidth(const Option &O) const; 514 515 // printOptionInfo - Print out information about this option. The 516 // to-be-maintained width is specified. 517 // 518 void printOptionInfo(const Option &O, size_t GlobalWidth) const; 519 520 // getValueName - Overload in subclass to provide a better default value. 521 virtual const char *getValueName() const { return "value"; } 522 523 // An out-of-line virtual method to provide a 'home' for this class. 524 virtual void anchor(); 525}; 526 527// basic_parser - The real basic parser is just a template wrapper that provides 528// a typedef for the provided data type. 529// 530template<class DataType> 531struct basic_parser : public basic_parser_impl { 532 typedef DataType parser_data_type; 533}; 534 535//-------------------------------------------------- 536// parser<bool> 537// 538template<> 539class parser<bool> : public basic_parser<bool> { 540 bool IsInvertable; // Should we synthezise a -xno- style option? 541 const char *ArgStr; 542public: 543 void getExtraOptionNames(std::vector<const char*> &OptionNames); 544 545 // parse - Return true on error. 546 bool parse(Option &O, const char *ArgName, const std::string &Arg, bool &Val); 547 548 template <class Opt> 549 void initialize(Opt &O) { 550 if (O.getMiscFlags() & llvm::cl::AllowInverse) 551 IsInvertable = true; 552 else 553 IsInvertable = false; 554 ArgStr = O.ArgStr; 555 } 556 557 enum ValueExpected getValueExpectedFlagDefault() const { 558 return ValueOptional; 559 } 560 561 // getValueName - Do not print =<value> at all. 562 virtual const char *getValueName() const { return 0; } 563 564 // An out-of-line virtual method to provide a 'home' for this class. 565 virtual void anchor(); 566}; 567 568EXTERN_TEMPLATE_INSTANTIATION(class basic_parser<bool>); 569 570//-------------------------------------------------- 571// parser<boolOrDefault> 572enum boolOrDefault { BOU_UNSET, BOU_TRUE, BOU_FALSE }; 573template<> 574class parser<boolOrDefault> : public basic_parser<boolOrDefault> { 575public: 576 // parse - Return true on error. 577 bool parse(Option &O, const char *ArgName, const std::string &Arg, 578 boolOrDefault &Val); 579 580 enum ValueExpected getValueExpectedFlagDefault() const { 581 return ValueOptional; 582 } 583 584 // getValueName - Do not print =<value> at all. 585 virtual const char *getValueName() const { return 0; } 586 587 // An out-of-line virtual method to provide a 'home' for this class. 588 virtual void anchor(); 589}; 590 591EXTERN_TEMPLATE_INSTANTIATION(class basic_parser<boolOrDefault>); 592 593//-------------------------------------------------- 594// parser<int> 595// 596template<> 597class parser<int> : public basic_parser<int> { 598public: 599 // parse - Return true on error. 600 bool parse(Option &O, const char *ArgName, const std::string &Arg, int &Val); 601 602 // getValueName - Overload in subclass to provide a better default value. 603 virtual const char *getValueName() const { return "int"; } 604 605 // An out-of-line virtual method to provide a 'home' for this class. 606 virtual void anchor(); 607}; 608 609EXTERN_TEMPLATE_INSTANTIATION(class basic_parser<int>); 610 611 612//-------------------------------------------------- 613// parser<unsigned> 614// 615template<> 616class parser<unsigned> : public basic_parser<unsigned> { 617public: 618 // parse - Return true on error. 619 bool parse(Option &O, const char *AN, const std::string &Arg, unsigned &Val); 620 621 // getValueName - Overload in subclass to provide a better default value. 622 virtual const char *getValueName() const { return "uint"; } 623 624 // An out-of-line virtual method to provide a 'home' for this class. 625 virtual void anchor(); 626}; 627 628EXTERN_TEMPLATE_INSTANTIATION(class basic_parser<unsigned>); 629 630//-------------------------------------------------- 631// parser<double> 632// 633template<> 634class parser<double> : public basic_parser<double> { 635public: 636 // parse - Return true on error. 637 bool parse(Option &O, const char *AN, const std::string &Arg, double &Val); 638 639 // getValueName - Overload in subclass to provide a better default value. 640 virtual const char *getValueName() const { return "number"; } 641 642 // An out-of-line virtual method to provide a 'home' for this class. 643 virtual void anchor(); 644}; 645 646EXTERN_TEMPLATE_INSTANTIATION(class basic_parser<double>); 647 648//-------------------------------------------------- 649// parser<float> 650// 651template<> 652class parser<float> : public basic_parser<float> { 653public: 654 // parse - Return true on error. 655 bool parse(Option &O, const char *AN, const std::string &Arg, float &Val); 656 657 // getValueName - Overload in subclass to provide a better default value. 658 virtual const char *getValueName() const { return "number"; } 659 660 // An out-of-line virtual method to provide a 'home' for this class. 661 virtual void anchor(); 662}; 663 664EXTERN_TEMPLATE_INSTANTIATION(class basic_parser<float>); 665 666//-------------------------------------------------- 667// parser<std::string> 668// 669template<> 670class parser<std::string> : public basic_parser<std::string> { 671public: 672 // parse - Return true on error. 673 bool parse(Option &, const char *, const std::string &Arg, 674 std::string &Value) { 675 Value = Arg; 676 return false; 677 } 678 679 // getValueName - Overload in subclass to provide a better default value. 680 virtual const char *getValueName() const { return "string"; } 681 682 // An out-of-line virtual method to provide a 'home' for this class. 683 virtual void anchor(); 684}; 685 686EXTERN_TEMPLATE_INSTANTIATION(class basic_parser<std::string>); 687 688//===----------------------------------------------------------------------===// 689// applicator class - This class is used because we must use partial 690// specialization to handle literal string arguments specially (const char* does 691// not correctly respond to the apply method). Because the syntax to use this 692// is a pain, we have the 'apply' method below to handle the nastiness... 693// 694template<class Mod> struct applicator { 695 template<class Opt> 696 static void opt(const Mod &M, Opt &O) { M.apply(O); } 697}; 698 699// Handle const char* as a special case... 700template<unsigned n> struct applicator<char[n]> { 701 template<class Opt> 702 static void opt(const char *Str, Opt &O) { O.setArgStr(Str); } 703}; 704template<unsigned n> struct applicator<const char[n]> { 705 template<class Opt> 706 static void opt(const char *Str, Opt &O) { O.setArgStr(Str); } 707}; 708template<> struct applicator<const char*> { 709 template<class Opt> 710 static void opt(const char *Str, Opt &O) { O.setArgStr(Str); } 711}; 712 713template<> struct applicator<NumOccurrences> { 714 static void opt(NumOccurrences NO, Option &O) { O.setNumOccurrencesFlag(NO); } 715}; 716template<> struct applicator<ValueExpected> { 717 static void opt(ValueExpected VE, Option &O) { O.setValueExpectedFlag(VE); } 718}; 719template<> struct applicator<OptionHidden> { 720 static void opt(OptionHidden OH, Option &O) { O.setHiddenFlag(OH); } 721}; 722template<> struct applicator<FormattingFlags> { 723 static void opt(FormattingFlags FF, Option &O) { O.setFormattingFlag(FF); } 724}; 725template<> struct applicator<MiscFlags> { 726 static void opt(MiscFlags MF, Option &O) { O.setMiscFlag(MF); } 727}; 728 729// apply method - Apply a modifier to an option in a type safe way. 730template<class Mod, class Opt> 731void apply(const Mod &M, Opt *O) { 732 applicator<Mod>::opt(M, *O); 733} 734 735 736//===----------------------------------------------------------------------===// 737// opt_storage class 738 739// Default storage class definition: external storage. This implementation 740// assumes the user will specify a variable to store the data into with the 741// cl::location(x) modifier. 742// 743template<class DataType, bool ExternalStorage, bool isClass> 744class opt_storage { 745 DataType *Location; // Where to store the object... 746 747 void check() { 748 assert(Location != 0 && "cl::location(...) not specified for a command " 749 "line option with external storage, " 750 "or cl::init specified before cl::location()!!"); 751 } 752public: 753 opt_storage() : Location(0) {} 754 755 bool setLocation(Option &O, DataType &L) { 756 if (Location) 757 return O.error(": cl::location(x) specified more than once!"); 758 Location = &L; 759 return false; 760 } 761 762 template<class T> 763 void setValue(const T &V) { 764 check(); 765 *Location = V; 766 } 767 768 DataType &getValue() { check(); return *Location; } 769 const DataType &getValue() const { check(); return *Location; } 770}; 771 772 773// Define how to hold a class type object, such as a string. Since we can 774// inherit from a class, we do so. This makes us exactly compatible with the 775// object in all cases that it is used. 776// 777template<class DataType> 778class opt_storage<DataType,false,true> : public DataType { 779public: 780 template<class T> 781 void setValue(const T &V) { DataType::operator=(V); } 782 783 DataType &getValue() { return *this; } 784 const DataType &getValue() const { return *this; } 785}; 786 787// Define a partial specialization to handle things we cannot inherit from. In 788// this case, we store an instance through containment, and overload operators 789// to get at the value. 790// 791template<class DataType> 792class opt_storage<DataType, false, false> { 793public: 794 DataType Value; 795 796 // Make sure we initialize the value with the default constructor for the 797 // type. 798 opt_storage() : Value(DataType()) {} 799 800 template<class T> 801 void setValue(const T &V) { Value = V; } 802 DataType &getValue() { return Value; } 803 DataType getValue() const { return Value; } 804 805 // If the datatype is a pointer, support -> on it. 806 DataType operator->() const { return Value; } 807}; 808 809 810//===----------------------------------------------------------------------===// 811// opt - A scalar command line option. 812// 813template <class DataType, bool ExternalStorage = false, 814 class ParserClass = parser<DataType> > 815class opt : public Option, 816 public opt_storage<DataType, ExternalStorage, 817 is_class<DataType>::value> { 818 ParserClass Parser; 819 820 virtual bool handleOccurrence(unsigned pos, const char *ArgName, 821 const std::string &Arg) { 822 typename ParserClass::parser_data_type Val = 823 typename ParserClass::parser_data_type(); 824 if (Parser.parse(*this, ArgName, Arg, Val)) 825 return true; // Parse error! 826 this->setValue(Val); 827 this->setPosition(pos); 828 return false; 829 } 830 831 virtual enum ValueExpected getValueExpectedFlagDefault() const { 832 return Parser.getValueExpectedFlagDefault(); 833 } 834 virtual void getExtraOptionNames(std::vector<const char*> &OptionNames) { 835 return Parser.getExtraOptionNames(OptionNames); 836 } 837 838 // Forward printing stuff to the parser... 839 virtual size_t getOptionWidth() const {return Parser.getOptionWidth(*this);} 840 virtual void printOptionInfo(size_t GlobalWidth) const { 841 Parser.printOptionInfo(*this, GlobalWidth); 842 } 843 844 void done() { 845 addArgument(); 846 Parser.initialize(*this); 847 } 848public: 849 // setInitialValue - Used by the cl::init modifier... 850 void setInitialValue(const DataType &V) { this->setValue(V); } 851 852 ParserClass &getParser() { return Parser; } 853 854 operator DataType() const { return this->getValue(); } 855 856 template<class T> 857 DataType &operator=(const T &Val) { 858 this->setValue(Val); 859 return this->getValue(); 860 } 861 862 // One option... 863 template<class M0t> 864 explicit opt(const M0t &M0) : Option(Optional | NotHidden) { 865 apply(M0, this); 866 done(); 867 } 868 869 // Two options... 870 template<class M0t, class M1t> 871 opt(const M0t &M0, const M1t &M1) : Option(Optional | NotHidden) { 872 apply(M0, this); apply(M1, this); 873 done(); 874 } 875 876 // Three options... 877 template<class M0t, class M1t, class M2t> 878 opt(const M0t &M0, const M1t &M1, 879 const M2t &M2) : Option(Optional | NotHidden) { 880 apply(M0, this); apply(M1, this); apply(M2, this); 881 done(); 882 } 883 // Four options... 884 template<class M0t, class M1t, class M2t, class M3t> 885 opt(const M0t &M0, const M1t &M1, const M2t &M2, 886 const M3t &M3) : Option(Optional | NotHidden) { 887 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this); 888 done(); 889 } 890 // Five options... 891 template<class M0t, class M1t, class M2t, class M3t, class M4t> 892 opt(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3, 893 const M4t &M4) : Option(Optional | NotHidden) { 894 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this); 895 apply(M4, this); 896 done(); 897 } 898 // Six options... 899 template<class M0t, class M1t, class M2t, class M3t, 900 class M4t, class M5t> 901 opt(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3, 902 const M4t &M4, const M5t &M5) : Option(Optional | NotHidden) { 903 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this); 904 apply(M4, this); apply(M5, this); 905 done(); 906 } 907 // Seven options... 908 template<class M0t, class M1t, class M2t, class M3t, 909 class M4t, class M5t, class M6t> 910 opt(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3, 911 const M4t &M4, const M5t &M5, 912 const M6t &M6) : Option(Optional | NotHidden) { 913 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this); 914 apply(M4, this); apply(M5, this); apply(M6, this); 915 done(); 916 } 917 // Eight options... 918 template<class M0t, class M1t, class M2t, class M3t, 919 class M4t, class M5t, class M6t, class M7t> 920 opt(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3, 921 const M4t &M4, const M5t &M5, const M6t &M6, 922 const M7t &M7) : Option(Optional | NotHidden) { 923 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this); 924 apply(M4, this); apply(M5, this); apply(M6, this); apply(M7, this); 925 done(); 926 } 927}; 928 929EXTERN_TEMPLATE_INSTANTIATION(class opt<unsigned>); 930EXTERN_TEMPLATE_INSTANTIATION(class opt<int>); 931EXTERN_TEMPLATE_INSTANTIATION(class opt<std::string>); 932EXTERN_TEMPLATE_INSTANTIATION(class opt<bool>); 933 934//===----------------------------------------------------------------------===// 935// list_storage class 936 937// Default storage class definition: external storage. This implementation 938// assumes the user will specify a variable to store the data into with the 939// cl::location(x) modifier. 940// 941template<class DataType, class StorageClass> 942class list_storage { 943 StorageClass *Location; // Where to store the object... 944 945public: 946 list_storage() : Location(0) {} 947 948 bool setLocation(Option &O, StorageClass &L) { 949 if (Location) 950 return O.error(": cl::location(x) specified more than once!"); 951 Location = &L; 952 return false; 953 } 954 955 template<class T> 956 void addValue(const T &V) { 957 assert(Location != 0 && "cl::location(...) not specified for a command " 958 "line option with external storage!"); 959 Location->push_back(V); 960 } 961}; 962 963 964// Define how to hold a class type object, such as a string. Since we can 965// inherit from a class, we do so. This makes us exactly compatible with the 966// object in all cases that it is used. 967// 968template<class DataType> 969class list_storage<DataType, bool> : public std::vector<DataType> { 970public: 971 template<class T> 972 void addValue(const T &V) { push_back(V); } 973}; 974 975 976//===----------------------------------------------------------------------===// 977// list - A list of command line options. 978// 979template <class DataType, class Storage = bool, 980 class ParserClass = parser<DataType> > 981class list : public Option, public list_storage<DataType, Storage> { 982 std::vector<unsigned> Positions; 983 ParserClass Parser; 984 985 virtual enum ValueExpected getValueExpectedFlagDefault() const { 986 return Parser.getValueExpectedFlagDefault(); 987 } 988 virtual void getExtraOptionNames(std::vector<const char*> &OptionNames) { 989 return Parser.getExtraOptionNames(OptionNames); 990 } 991 992 virtual bool handleOccurrence(unsigned pos, const char *ArgName, 993 const std::string &Arg) { 994 typename ParserClass::parser_data_type Val = 995 typename ParserClass::parser_data_type(); 996 if (Parser.parse(*this, ArgName, Arg, Val)) 997 return true; // Parse Error! 998 addValue(Val); 999 setPosition(pos); 1000 Positions.push_back(pos); 1001 return false; 1002 } 1003 1004 // Forward printing stuff to the parser... 1005 virtual size_t getOptionWidth() const {return Parser.getOptionWidth(*this);} 1006 virtual void printOptionInfo(size_t GlobalWidth) const { 1007 Parser.printOptionInfo(*this, GlobalWidth); 1008 } 1009 1010 void done() { 1011 addArgument(); 1012 Parser.initialize(*this); 1013 } 1014public: 1015 ParserClass &getParser() { return Parser; } 1016 1017 unsigned getPosition(unsigned optnum) const { 1018 assert(optnum < this->size() && "Invalid option index"); 1019 return Positions[optnum]; 1020 } 1021 1022 void setNumAdditionalVals(unsigned n) { 1023 Option::setNumAdditionalVals(n); 1024 } 1025 1026 // One option... 1027 template<class M0t> 1028 explicit list(const M0t &M0) : Option(ZeroOrMore | NotHidden) { 1029 apply(M0, this); 1030 done(); 1031 } 1032 // Two options... 1033 template<class M0t, class M1t> 1034 list(const M0t &M0, const M1t &M1) : Option(ZeroOrMore | NotHidden) { 1035 apply(M0, this); apply(M1, this); 1036 done(); 1037 } 1038 // Three options... 1039 template<class M0t, class M1t, class M2t> 1040 list(const M0t &M0, const M1t &M1, const M2t &M2) 1041 : Option(ZeroOrMore | NotHidden) { 1042 apply(M0, this); apply(M1, this); apply(M2, this); 1043 done(); 1044 } 1045 // Four options... 1046 template<class M0t, class M1t, class M2t, class M3t> 1047 list(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3) 1048 : Option(ZeroOrMore | NotHidden) { 1049 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this); 1050 done(); 1051 } 1052 // Five options... 1053 template<class M0t, class M1t, class M2t, class M3t, class M4t> 1054 list(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3, 1055 const M4t &M4) : Option(ZeroOrMore | NotHidden) { 1056 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this); 1057 apply(M4, this); 1058 done(); 1059 } 1060 // Six options... 1061 template<class M0t, class M1t, class M2t, class M3t, 1062 class M4t, class M5t> 1063 list(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3, 1064 const M4t &M4, const M5t &M5) : Option(ZeroOrMore | NotHidden) { 1065 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this); 1066 apply(M4, this); apply(M5, this); 1067 done(); 1068 } 1069 // Seven options... 1070 template<class M0t, class M1t, class M2t, class M3t, 1071 class M4t, class M5t, class M6t> 1072 list(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3, 1073 const M4t &M4, const M5t &M5, const M6t &M6) 1074 : Option(ZeroOrMore | NotHidden) { 1075 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this); 1076 apply(M4, this); apply(M5, this); apply(M6, this); 1077 done(); 1078 } 1079 // Eight options... 1080 template<class M0t, class M1t, class M2t, class M3t, 1081 class M4t, class M5t, class M6t, class M7t> 1082 list(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3, 1083 const M4t &M4, const M5t &M5, const M6t &M6, 1084 const M7t &M7) : Option(ZeroOrMore | NotHidden) { 1085 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this); 1086 apply(M4, this); apply(M5, this); apply(M6, this); apply(M7, this); 1087 done(); 1088 } 1089}; 1090 1091// multi_arg - Modifier to set the number of additional values. 1092struct multi_val { 1093 unsigned AdditionalVals; 1094 explicit multi_val(unsigned N) : AdditionalVals(N) {} 1095 1096 template <typename D, typename S, typename P> 1097 void apply(list<D, S, P> &L) const { L.setNumAdditionalVals(AdditionalVals); } 1098}; 1099 1100 1101//===----------------------------------------------------------------------===// 1102// bits_storage class 1103 1104// Default storage class definition: external storage. This implementation 1105// assumes the user will specify a variable to store the data into with the 1106// cl::location(x) modifier. 1107// 1108template<class DataType, class StorageClass> 1109class bits_storage { 1110 unsigned *Location; // Where to store the bits... 1111 1112 template<class T> 1113 static unsigned Bit(const T &V) { 1114 unsigned BitPos = reinterpret_cast<unsigned>(V); 1115 assert(BitPos < sizeof(unsigned) * 8 && 1116 "enum exceeds width of bit vector!"); 1117 return 1 << BitPos; 1118 } 1119 1120public: 1121 bits_storage() : Location(0) {} 1122 1123 bool setLocation(Option &O, unsigned &L) { 1124 if (Location) 1125 return O.error(": cl::location(x) specified more than once!"); 1126 Location = &L; 1127 return false; 1128 } 1129 1130 template<class T> 1131 void addValue(const T &V) { 1132 assert(Location != 0 && "cl::location(...) not specified for a command " 1133 "line option with external storage!"); 1134 *Location |= Bit(V); 1135 } 1136 1137 unsigned getBits() { return *Location; } 1138 1139 template<class T> 1140 bool isSet(const T &V) { 1141 return (*Location & Bit(V)) != 0; 1142 } 1143}; 1144 1145 1146// Define how to hold bits. Since we can inherit from a class, we do so. 1147// This makes us exactly compatible with the bits in all cases that it is used. 1148// 1149template<class DataType> 1150class bits_storage<DataType, bool> { 1151 unsigned Bits; // Where to store the bits... 1152 1153 template<class T> 1154 static unsigned Bit(const T &V) { 1155 unsigned BitPos = reinterpret_cast<unsigned>(V); 1156 assert(BitPos < sizeof(unsigned) * 8 && 1157 "enum exceeds width of bit vector!"); 1158 return 1 << BitPos; 1159 } 1160 1161public: 1162 template<class T> 1163 void addValue(const T &V) { 1164 Bits |= Bit(V); 1165 } 1166 1167 unsigned getBits() { return Bits; } 1168 1169 template<class T> 1170 bool isSet(const T &V) { 1171 return (Bits & Bit(V)) != 0; 1172 } 1173}; 1174 1175 1176//===----------------------------------------------------------------------===// 1177// bits - A bit vector of command options. 1178// 1179template <class DataType, class Storage = bool, 1180 class ParserClass = parser<DataType> > 1181class bits : public Option, public bits_storage<DataType, Storage> { 1182 std::vector<unsigned> Positions; 1183 ParserClass Parser; 1184 1185 virtual enum ValueExpected getValueExpectedFlagDefault() const { 1186 return Parser.getValueExpectedFlagDefault(); 1187 } 1188 virtual void getExtraOptionNames(std::vector<const char*> &OptionNames) { 1189 return Parser.getExtraOptionNames(OptionNames); 1190 } 1191 1192 virtual bool handleOccurrence(unsigned pos, const char *ArgName, 1193 const std::string &Arg) { 1194 typename ParserClass::parser_data_type Val = 1195 typename ParserClass::parser_data_type(); 1196 if (Parser.parse(*this, ArgName, Arg, Val)) 1197 return true; // Parse Error! 1198 addValue(Val); 1199 setPosition(pos); 1200 Positions.push_back(pos); 1201 return false; 1202 } 1203 1204 // Forward printing stuff to the parser... 1205 virtual size_t getOptionWidth() const {return Parser.getOptionWidth(*this);} 1206 virtual void printOptionInfo(size_t GlobalWidth) const { 1207 Parser.printOptionInfo(*this, GlobalWidth); 1208 } 1209 1210 void done() { 1211 addArgument(); 1212 Parser.initialize(*this); 1213 } 1214public: 1215 ParserClass &getParser() { return Parser; } 1216 1217 unsigned getPosition(unsigned optnum) const { 1218 assert(optnum < this->size() && "Invalid option index"); 1219 return Positions[optnum]; 1220 } 1221 1222 // One option... 1223 template<class M0t> 1224 explicit bits(const M0t &M0) : Option(ZeroOrMore | NotHidden) { 1225 apply(M0, this); 1226 done(); 1227 } 1228 // Two options... 1229 template<class M0t, class M1t> 1230 bits(const M0t &M0, const M1t &M1) : Option(ZeroOrMore | NotHidden) { 1231 apply(M0, this); apply(M1, this); 1232 done(); 1233 } 1234 // Three options... 1235 template<class M0t, class M1t, class M2t> 1236 bits(const M0t &M0, const M1t &M1, const M2t &M2) 1237 : Option(ZeroOrMore | NotHidden) { 1238 apply(M0, this); apply(M1, this); apply(M2, this); 1239 done(); 1240 } 1241 // Four options... 1242 template<class M0t, class M1t, class M2t, class M3t> 1243 bits(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3) 1244 : Option(ZeroOrMore | NotHidden) { 1245 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this); 1246 done(); 1247 } 1248 // Five options... 1249 template<class M0t, class M1t, class M2t, class M3t, class M4t> 1250 bits(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3, 1251 const M4t &M4) : Option(ZeroOrMore | NotHidden) { 1252 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this); 1253 apply(M4, this); 1254 done(); 1255 } 1256 // Six options... 1257 template<class M0t, class M1t, class M2t, class M3t, 1258 class M4t, class M5t> 1259 bits(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3, 1260 const M4t &M4, const M5t &M5) : Option(ZeroOrMore | NotHidden) { 1261 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this); 1262 apply(M4, this); apply(M5, this); 1263 done(); 1264 } 1265 // Seven options... 1266 template<class M0t, class M1t, class M2t, class M3t, 1267 class M4t, class M5t, class M6t> 1268 bits(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3, 1269 const M4t &M4, const M5t &M5, const M6t &M6) 1270 : Option(ZeroOrMore | NotHidden) { 1271 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this); 1272 apply(M4, this); apply(M5, this); apply(M6, this); 1273 done(); 1274 } 1275 // Eight options... 1276 template<class M0t, class M1t, class M2t, class M3t, 1277 class M4t, class M5t, class M6t, class M7t> 1278 bits(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3, 1279 const M4t &M4, const M5t &M5, const M6t &M6, 1280 const M7t &M7) : Option(ZeroOrMore | NotHidden) { 1281 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this); 1282 apply(M4, this); apply(M5, this); apply(M6, this); apply(M7, this); 1283 done(); 1284 } 1285}; 1286 1287//===----------------------------------------------------------------------===// 1288// Aliased command line option (alias this name to a preexisting name) 1289// 1290 1291class alias : public Option { 1292 Option *AliasFor; 1293 virtual bool handleOccurrence(unsigned pos, const char * /*ArgName*/, 1294 const std::string &Arg) { 1295 return AliasFor->handleOccurrence(pos, AliasFor->ArgStr, Arg); 1296 } 1297 // Handle printing stuff... 1298 virtual size_t getOptionWidth() const; 1299 virtual void printOptionInfo(size_t GlobalWidth) const; 1300 1301 void done() { 1302 if (!hasArgStr()) 1303 error(": cl::alias must have argument name specified!"); 1304 if (AliasFor == 0) 1305 error(": cl::alias must have an cl::aliasopt(option) specified!"); 1306 addArgument(); 1307 } 1308public: 1309 void setAliasFor(Option &O) { 1310 if (AliasFor) 1311 error(": cl::alias must only have one cl::aliasopt(...) specified!"); 1312 AliasFor = &O; 1313 } 1314 1315 // One option... 1316 template<class M0t> 1317 explicit alias(const M0t &M0) : Option(Optional | Hidden), AliasFor(0) { 1318 apply(M0, this); 1319 done(); 1320 } 1321 // Two options... 1322 template<class M0t, class M1t> 1323 alias(const M0t &M0, const M1t &M1) : Option(Optional | Hidden), AliasFor(0) { 1324 apply(M0, this); apply(M1, this); 1325 done(); 1326 } 1327 // Three options... 1328 template<class M0t, class M1t, class M2t> 1329 alias(const M0t &M0, const M1t &M1, const M2t &M2) 1330 : Option(Optional | Hidden), AliasFor(0) { 1331 apply(M0, this); apply(M1, this); apply(M2, this); 1332 done(); 1333 } 1334 // Four options... 1335 template<class M0t, class M1t, class M2t, class M3t> 1336 alias(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3) 1337 : Option(Optional | Hidden), AliasFor(0) { 1338 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this); 1339 done(); 1340 } 1341}; 1342 1343// aliasfor - Modifier to set the option an alias aliases. 1344struct aliasopt { 1345 Option &Opt; 1346 explicit aliasopt(Option &O) : Opt(O) {} 1347 void apply(alias &A) const { A.setAliasFor(Opt); } 1348}; 1349 1350// extrahelp - provide additional help at the end of the normal help 1351// output. All occurrences of cl::extrahelp will be accumulated and 1352// printed to std::cerr at the end of the regular help, just before 1353// exit is called. 1354struct extrahelp { 1355 const char * morehelp; 1356 explicit extrahelp(const char* help); 1357}; 1358 1359void PrintVersionMessage(); 1360// This function just prints the help message, exactly the same way as if the 1361// --help option had been given on the command line. 1362// NOTE: THIS FUNCTION TERMINATES THE PROGRAM! 1363void PrintHelpMessage(); 1364 1365} // End namespace cl 1366 1367} // End namespace llvm 1368 1369#endif 1370