1 //===-- CommandLine.cpp - Command line parser implementation --------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
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.
14 // Note that rather than trying to figure out what this code does, you could try
15 // reading the library documentation located in docs/CommandLine.html
17 //===----------------------------------------------------------------------===//
19 #include "llvm/Support/CommandLine.h"
20 #include "llvm/ADT/OwningPtr.h"
21 #include "llvm/ADT/SmallPtrSet.h"
22 #include "llvm/ADT/SmallString.h"
23 #include "llvm/ADT/StringMap.h"
24 #include "llvm/ADT/Twine.h"
25 #include "llvm/Config/config.h"
26 #include "llvm/Support/Debug.h"
27 #include "llvm/Support/ErrorHandling.h"
28 #include "llvm/Support/Host.h"
29 #include "llvm/Support/ManagedStatic.h"
30 #include "llvm/Support/MemoryBuffer.h"
31 #include "llvm/Support/Path.h"
32 #include "llvm/Support/PathV1.h"
33 #include "llvm/Support/raw_ostream.h"
34 #include "llvm/Support/system_error.h"
41 //===----------------------------------------------------------------------===//
42 // Template instantiations and anchors.
44 namespace llvm { namespace cl {
45 TEMPLATE_INSTANTIATION(class basic_parser<bool>);
46 TEMPLATE_INSTANTIATION(class basic_parser<boolOrDefault>);
47 TEMPLATE_INSTANTIATION(class basic_parser<int>);
48 TEMPLATE_INSTANTIATION(class basic_parser<unsigned>);
49 TEMPLATE_INSTANTIATION(class basic_parser<unsigned long long>);
50 TEMPLATE_INSTANTIATION(class basic_parser<double>);
51 TEMPLATE_INSTANTIATION(class basic_parser<float>);
52 TEMPLATE_INSTANTIATION(class basic_parser<std::string>);
53 TEMPLATE_INSTANTIATION(class basic_parser<char>);
55 TEMPLATE_INSTANTIATION(class opt<unsigned>);
56 TEMPLATE_INSTANTIATION(class opt<int>);
57 TEMPLATE_INSTANTIATION(class opt<std::string>);
58 TEMPLATE_INSTANTIATION(class opt<char>);
59 TEMPLATE_INSTANTIATION(class opt<bool>);
60 } } // end namespace llvm::cl
62 void GenericOptionValue::anchor() {}
63 void OptionValue<boolOrDefault>::anchor() {}
64 void OptionValue<std::string>::anchor() {}
65 void Option::anchor() {}
66 void basic_parser_impl::anchor() {}
67 void parser<bool>::anchor() {}
68 void parser<boolOrDefault>::anchor() {}
69 void parser<int>::anchor() {}
70 void parser<unsigned>::anchor() {}
71 void parser<unsigned long long>::anchor() {}
72 void parser<double>::anchor() {}
73 void parser<float>::anchor() {}
74 void parser<std::string>::anchor() {}
75 void parser<char>::anchor() {}
77 //===----------------------------------------------------------------------===//
79 // Globals for name and overview of program. Program name is not a string to
80 // avoid static ctor/dtor issues.
81 static char ProgramName[80] = "<premain>";
82 static const char *ProgramOverview = 0;
84 // This collects additional help to be printed.
85 static ManagedStatic<std::vector<const char*> > MoreHelp;
87 extrahelp::extrahelp(const char *Help)
89 MoreHelp->push_back(Help);
92 static bool OptionListChanged = false;
94 // MarkOptionsChanged - Internal helper function.
95 void cl::MarkOptionsChanged() {
96 OptionListChanged = true;
99 /// RegisteredOptionList - This is the list of the command line options that
100 /// have statically constructed themselves.
101 static Option *RegisteredOptionList = 0;
103 void Option::addArgument() {
104 assert(NextRegistered == 0 && "argument multiply registered!");
106 NextRegistered = RegisteredOptionList;
107 RegisteredOptionList = this;
108 MarkOptionsChanged();
111 // This collects the different option categories that have been registered.
112 typedef SmallPtrSet<OptionCategory*,16> OptionCatSet;
113 static ManagedStatic<OptionCatSet> RegisteredOptionCategories;
115 // Initialise the general option category.
116 OptionCategory llvm::cl::GeneralCategory("General options");
118 void OptionCategory::registerCategory()
120 RegisteredOptionCategories->insert(this);
123 //===----------------------------------------------------------------------===//
124 // Basic, shared command line option processing machinery.
127 /// GetOptionInfo - Scan the list of registered options, turning them into data
128 /// structures that are easier to handle.
129 static void GetOptionInfo(SmallVectorImpl<Option*> &PositionalOpts,
130 SmallVectorImpl<Option*> &SinkOpts,
131 StringMap<Option*> &OptionsMap) {
132 SmallVector<const char*, 16> OptionNames;
133 Option *CAOpt = 0; // The ConsumeAfter option if it exists.
134 for (Option *O = RegisteredOptionList; O; O = O->getNextRegisteredOption()) {
135 // If this option wants to handle multiple option names, get the full set.
136 // This handles enum options like "-O1 -O2" etc.
137 O->getExtraOptionNames(OptionNames);
139 OptionNames.push_back(O->ArgStr);
141 // Handle named options.
142 for (size_t i = 0, e = OptionNames.size(); i != e; ++i) {
143 // Add argument to the argument map!
144 if (OptionsMap.GetOrCreateValue(OptionNames[i], O).second != O) {
145 errs() << ProgramName << ": CommandLine Error: Argument '"
146 << OptionNames[i] << "' defined more than once!\n";
152 // Remember information about positional options.
153 if (O->getFormattingFlag() == cl::Positional)
154 PositionalOpts.push_back(O);
155 else if (O->getMiscFlags() & cl::Sink) // Remember sink options
156 SinkOpts.push_back(O);
157 else if (O->getNumOccurrencesFlag() == cl::ConsumeAfter) {
159 O->error("Cannot specify more than one option with cl::ConsumeAfter!");
165 PositionalOpts.push_back(CAOpt);
167 // Make sure that they are in order of registration not backwards.
168 std::reverse(PositionalOpts.begin(), PositionalOpts.end());
172 /// LookupOption - Lookup the option specified by the specified option on the
173 /// command line. If there is a value specified (after an equal sign) return
174 /// that as well. This assumes that leading dashes have already been stripped.
175 static Option *LookupOption(StringRef &Arg, StringRef &Value,
176 const StringMap<Option*> &OptionsMap) {
177 // Reject all dashes.
178 if (Arg.empty()) return 0;
180 size_t EqualPos = Arg.find('=');
182 // If we have an equals sign, remember the value.
183 if (EqualPos == StringRef::npos) {
184 // Look up the option.
185 StringMap<Option*>::const_iterator I = OptionsMap.find(Arg);
186 return I != OptionsMap.end() ? I->second : 0;
189 // If the argument before the = is a valid option name, we match. If not,
190 // return Arg unmolested.
191 StringMap<Option*>::const_iterator I =
192 OptionsMap.find(Arg.substr(0, EqualPos));
193 if (I == OptionsMap.end()) return 0;
195 Value = Arg.substr(EqualPos+1);
196 Arg = Arg.substr(0, EqualPos);
200 /// LookupNearestOption - Lookup the closest match to the option specified by
201 /// the specified option on the command line. If there is a value specified
202 /// (after an equal sign) return that as well. This assumes that leading dashes
203 /// have already been stripped.
204 static Option *LookupNearestOption(StringRef Arg,
205 const StringMap<Option*> &OptionsMap,
206 std::string &NearestString) {
207 // Reject all dashes.
208 if (Arg.empty()) return 0;
210 // Split on any equal sign.
211 std::pair<StringRef, StringRef> SplitArg = Arg.split('=');
212 StringRef &LHS = SplitArg.first; // LHS == Arg when no '=' is present.
213 StringRef &RHS = SplitArg.second;
215 // Find the closest match.
217 unsigned BestDistance = 0;
218 for (StringMap<Option*>::const_iterator it = OptionsMap.begin(),
219 ie = OptionsMap.end(); it != ie; ++it) {
220 Option *O = it->second;
221 SmallVector<const char*, 16> OptionNames;
222 O->getExtraOptionNames(OptionNames);
224 OptionNames.push_back(O->ArgStr);
226 bool PermitValue = O->getValueExpectedFlag() != cl::ValueDisallowed;
227 StringRef Flag = PermitValue ? LHS : Arg;
228 for (size_t i = 0, e = OptionNames.size(); i != e; ++i) {
229 StringRef Name = OptionNames[i];
230 unsigned Distance = StringRef(Name).edit_distance(
231 Flag, /*AllowReplacements=*/true, /*MaxEditDistance=*/BestDistance);
232 if (!Best || Distance < BestDistance) {
234 BestDistance = Distance;
235 if (RHS.empty() || !PermitValue)
236 NearestString = OptionNames[i];
238 NearestString = std::string(OptionNames[i]) + "=" + RHS.str();
246 /// CommaSeparateAndAddOccurence - A wrapper around Handler->addOccurence() that
247 /// does special handling of cl::CommaSeparated options.
248 static bool CommaSeparateAndAddOccurence(Option *Handler, unsigned pos,
250 StringRef Value, bool MultiArg = false)
252 // Check to see if this option accepts a comma separated list of values. If
253 // it does, we have to split up the value into multiple values.
254 if (Handler->getMiscFlags() & CommaSeparated) {
255 StringRef Val(Value);
256 StringRef::size_type Pos = Val.find(',');
258 while (Pos != StringRef::npos) {
259 // Process the portion before the comma.
260 if (Handler->addOccurrence(pos, ArgName, Val.substr(0, Pos), MultiArg))
262 // Erase the portion before the comma, AND the comma.
263 Val = Val.substr(Pos+1);
264 Value.substr(Pos+1); // Increment the original value pointer as well.
265 // Check for another comma.
272 if (Handler->addOccurrence(pos, ArgName, Value, MultiArg))
278 /// ProvideOption - For Value, this differentiates between an empty value ("")
279 /// and a null value (StringRef()). The later is accepted for arguments that
280 /// don't allow a value (-foo) the former is rejected (-foo=).
281 static inline bool ProvideOption(Option *Handler, StringRef ArgName,
282 StringRef Value, int argc,
283 const char *const *argv, int &i) {
284 // Is this a multi-argument option?
285 unsigned NumAdditionalVals = Handler->getNumAdditionalVals();
287 // Enforce value requirements
288 switch (Handler->getValueExpectedFlag()) {
290 if (Value.data() == 0) { // No value specified?
292 return Handler->error("requires a value!");
293 // Steal the next argument, like for '-o filename'
297 case ValueDisallowed:
298 if (NumAdditionalVals > 0)
299 return Handler->error("multi-valued option specified"
300 " with ValueDisallowed modifier!");
303 return Handler->error("does not allow a value! '" +
304 Twine(Value) + "' specified.");
310 // If this isn't a multi-arg option, just run the handler.
311 if (NumAdditionalVals == 0)
312 return CommaSeparateAndAddOccurence(Handler, i, ArgName, Value);
314 // If it is, run the handle several times.
315 bool MultiArg = false;
318 if (CommaSeparateAndAddOccurence(Handler, i, ArgName, Value, MultiArg))
324 while (NumAdditionalVals > 0) {
326 return Handler->error("not enough values!");
329 if (CommaSeparateAndAddOccurence(Handler, i, ArgName, Value, MultiArg))
337 static bool ProvidePositionalOption(Option *Handler, StringRef Arg, int i) {
339 return ProvideOption(Handler, Handler->ArgStr, Arg, 0, 0, Dummy);
343 // Option predicates...
344 static inline bool isGrouping(const Option *O) {
345 return O->getFormattingFlag() == cl::Grouping;
347 static inline bool isPrefixedOrGrouping(const Option *O) {
348 return isGrouping(O) || O->getFormattingFlag() == cl::Prefix;
351 // getOptionPred - Check to see if there are any options that satisfy the
352 // specified predicate with names that are the prefixes in Name. This is
353 // checked by progressively stripping characters off of the name, checking to
354 // see if there options that satisfy the predicate. If we find one, return it,
355 // otherwise return null.
357 static Option *getOptionPred(StringRef Name, size_t &Length,
358 bool (*Pred)(const Option*),
359 const StringMap<Option*> &OptionsMap) {
361 StringMap<Option*>::const_iterator OMI = OptionsMap.find(Name);
363 // Loop while we haven't found an option and Name still has at least two
364 // characters in it (so that the next iteration will not be the empty
366 while (OMI == OptionsMap.end() && Name.size() > 1) {
367 Name = Name.substr(0, Name.size()-1); // Chop off the last character.
368 OMI = OptionsMap.find(Name);
371 if (OMI != OptionsMap.end() && Pred(OMI->second)) {
372 Length = Name.size();
373 return OMI->second; // Found one!
375 return 0; // No option found!
378 /// HandlePrefixedOrGroupedOption - The specified argument string (which started
379 /// with at least one '-') does not fully match an available option. Check to
380 /// see if this is a prefix or grouped option. If so, split arg into output an
381 /// Arg/Value pair and return the Option to parse it with.
382 static Option *HandlePrefixedOrGroupedOption(StringRef &Arg, StringRef &Value,
384 const StringMap<Option*> &OptionsMap) {
385 if (Arg.size() == 1) return 0;
389 Option *PGOpt = getOptionPred(Arg, Length, isPrefixedOrGrouping, OptionsMap);
390 if (PGOpt == 0) return 0;
392 // If the option is a prefixed option, then the value is simply the
393 // rest of the name... so fall through to later processing, by
394 // setting up the argument name flags and value fields.
395 if (PGOpt->getFormattingFlag() == cl::Prefix) {
396 Value = Arg.substr(Length);
397 Arg = Arg.substr(0, Length);
398 assert(OptionsMap.count(Arg) && OptionsMap.find(Arg)->second == PGOpt);
402 // This must be a grouped option... handle them now. Grouping options can't
404 assert(isGrouping(PGOpt) && "Broken getOptionPred!");
407 // Move current arg name out of Arg into OneArgName.
408 StringRef OneArgName = Arg.substr(0, Length);
409 Arg = Arg.substr(Length);
411 // Because ValueRequired is an invalid flag for grouped arguments,
412 // we don't need to pass argc/argv in.
413 assert(PGOpt->getValueExpectedFlag() != cl::ValueRequired &&
414 "Option can not be cl::Grouping AND cl::ValueRequired!");
416 ErrorParsing |= ProvideOption(PGOpt, OneArgName,
417 StringRef(), 0, 0, Dummy);
419 // Get the next grouping option.
420 PGOpt = getOptionPred(Arg, Length, isGrouping, OptionsMap);
421 } while (PGOpt && Length != Arg.size());
423 // Return the last option with Arg cut down to just the last one.
429 static bool RequiresValue(const Option *O) {
430 return O->getNumOccurrencesFlag() == cl::Required ||
431 O->getNumOccurrencesFlag() == cl::OneOrMore;
434 static bool EatsUnboundedNumberOfValues(const Option *O) {
435 return O->getNumOccurrencesFlag() == cl::ZeroOrMore ||
436 O->getNumOccurrencesFlag() == cl::OneOrMore;
439 /// ParseCStringVector - Break INPUT up wherever one or more
440 /// whitespace characters are found, and store the resulting tokens in
441 /// OUTPUT. The tokens stored in OUTPUT are dynamically allocated
442 /// using strdup(), so it is the caller's responsibility to free()
445 static void ParseCStringVector(std::vector<char *> &OutputVector,
447 // Characters which will be treated as token separators:
448 StringRef Delims = " \v\f\t\r\n";
450 StringRef WorkStr(Input);
451 while (!WorkStr.empty()) {
452 // If the first character is a delimiter, strip them off.
453 if (Delims.find(WorkStr[0]) != StringRef::npos) {
454 size_t Pos = WorkStr.find_first_not_of(Delims);
455 if (Pos == StringRef::npos) Pos = WorkStr.size();
456 WorkStr = WorkStr.substr(Pos);
460 // Find position of first delimiter.
461 size_t Pos = WorkStr.find_first_of(Delims);
462 if (Pos == StringRef::npos) Pos = WorkStr.size();
464 // Everything from 0 to Pos is the next word to copy.
465 char *NewStr = (char*)malloc(Pos+1);
466 memcpy(NewStr, WorkStr.data(), Pos);
468 OutputVector.push_back(NewStr);
470 WorkStr = WorkStr.substr(Pos);
474 /// ParseEnvironmentOptions - An alternative entry point to the
475 /// CommandLine library, which allows you to read the program's name
476 /// from the caller (as PROGNAME) and its command-line arguments from
477 /// an environment variable (whose name is given in ENVVAR).
479 void cl::ParseEnvironmentOptions(const char *progName, const char *envVar,
480 const char *Overview) {
482 assert(progName && "Program name not specified");
483 assert(envVar && "Environment variable name missing");
485 // Get the environment variable they want us to parse options out of.
486 const char *envValue = getenv(envVar);
490 // Get program's "name", which we wouldn't know without the caller
492 std::vector<char*> newArgv;
493 newArgv.push_back(strdup(progName));
495 // Parse the value of the environment variable into a "command line"
496 // and hand it off to ParseCommandLineOptions().
497 ParseCStringVector(newArgv, envValue);
498 int newArgc = static_cast<int>(newArgv.size());
499 ParseCommandLineOptions(newArgc, &newArgv[0], Overview);
501 // Free all the strdup()ed strings.
502 for (std::vector<char*>::iterator i = newArgv.begin(), e = newArgv.end();
508 /// ExpandResponseFiles - Copy the contents of argv into newArgv,
509 /// substituting the contents of the response files for the arguments
511 static void ExpandResponseFiles(unsigned argc, const char*const* argv,
512 std::vector<char*>& newArgv) {
513 for (unsigned i = 1; i != argc; ++i) {
514 const char *arg = argv[i];
517 sys::PathWithStatus respFile(++arg);
519 // Check that the response file is not empty (mmap'ing empty
520 // files can be problematic).
521 const sys::FileStatus *FileStat = respFile.getFileStatus();
522 if (FileStat && FileStat->getSize() != 0) {
524 // If we could open the file, parse its contents, otherwise
525 // pass the @file option verbatim.
527 // TODO: we should also support recursive loading of response files,
528 // since this is how gcc behaves. (From their man page: "The file may
529 // itself contain additional @file options; any such options will be
530 // processed recursively.")
532 // Mmap the response file into memory.
533 OwningPtr<MemoryBuffer> respFilePtr;
534 if (!MemoryBuffer::getFile(respFile.c_str(), respFilePtr)) {
535 ParseCStringVector(newArgv, respFilePtr->getBufferStart());
540 newArgv.push_back(strdup(arg));
544 void cl::ParseCommandLineOptions(int argc, const char * const *argv,
545 const char *Overview) {
546 // Process all registered options.
547 SmallVector<Option*, 4> PositionalOpts;
548 SmallVector<Option*, 4> SinkOpts;
549 StringMap<Option*> Opts;
550 GetOptionInfo(PositionalOpts, SinkOpts, Opts);
552 assert((!Opts.empty() || !PositionalOpts.empty()) &&
553 "No options specified!");
555 // Expand response files.
556 std::vector<char*> newArgv;
557 newArgv.push_back(strdup(argv[0]));
558 ExpandResponseFiles(argc, argv, newArgv);
560 argc = static_cast<int>(newArgv.size());
562 // Copy the program name into ProgName, making sure not to overflow it.
563 std::string ProgName = sys::path::filename(argv[0]);
564 size_t Len = std::min(ProgName.size(), size_t(79));
565 memcpy(ProgramName, ProgName.data(), Len);
566 ProgramName[Len] = '\0';
568 ProgramOverview = Overview;
569 bool ErrorParsing = false;
571 // Check out the positional arguments to collect information about them.
572 unsigned NumPositionalRequired = 0;
574 // Determine whether or not there are an unlimited number of positionals
575 bool HasUnlimitedPositionals = false;
577 Option *ConsumeAfterOpt = 0;
578 if (!PositionalOpts.empty()) {
579 if (PositionalOpts[0]->getNumOccurrencesFlag() == cl::ConsumeAfter) {
580 assert(PositionalOpts.size() > 1 &&
581 "Cannot specify cl::ConsumeAfter without a positional argument!");
582 ConsumeAfterOpt = PositionalOpts[0];
585 // Calculate how many positional values are _required_.
586 bool UnboundedFound = false;
587 for (size_t i = ConsumeAfterOpt != 0, e = PositionalOpts.size();
589 Option *Opt = PositionalOpts[i];
590 if (RequiresValue(Opt))
591 ++NumPositionalRequired;
592 else if (ConsumeAfterOpt) {
593 // ConsumeAfter cannot be combined with "optional" positional options
594 // unless there is only one positional argument...
595 if (PositionalOpts.size() > 2)
597 Opt->error("error - this positional option will never be matched, "
598 "because it does not Require a value, and a "
599 "cl::ConsumeAfter option is active!");
600 } else if (UnboundedFound && !Opt->ArgStr[0]) {
601 // This option does not "require" a value... Make sure this option is
602 // not specified after an option that eats all extra arguments, or this
603 // one will never get any!
605 ErrorParsing |= Opt->error("error - option can never match, because "
606 "another positional argument will match an "
607 "unbounded number of values, and this option"
608 " does not require a value!");
610 UnboundedFound |= EatsUnboundedNumberOfValues(Opt);
612 HasUnlimitedPositionals = UnboundedFound || ConsumeAfterOpt;
615 // PositionalVals - A vector of "positional" arguments we accumulate into
616 // the process at the end.
618 SmallVector<std::pair<StringRef,unsigned>, 4> PositionalVals;
620 // If the program has named positional arguments, and the name has been run
621 // across, keep track of which positional argument was named. Otherwise put
622 // the positional args into the PositionalVals list...
623 Option *ActivePositionalArg = 0;
625 // Loop over all of the arguments... processing them.
626 bool DashDashFound = false; // Have we read '--'?
627 for (int i = 1; i < argc; ++i) {
629 Option *NearestHandler = 0;
630 std::string NearestHandlerString;
632 StringRef ArgName = "";
634 // If the option list changed, this means that some command line
635 // option has just been registered or deregistered. This can occur in
636 // response to things like -load, etc. If this happens, rescan the options.
637 if (OptionListChanged) {
638 PositionalOpts.clear();
641 GetOptionInfo(PositionalOpts, SinkOpts, Opts);
642 OptionListChanged = false;
645 // Check to see if this is a positional argument. This argument is
646 // considered to be positional if it doesn't start with '-', if it is "-"
647 // itself, or if we have seen "--" already.
649 if (argv[i][0] != '-' || argv[i][1] == 0 || DashDashFound) {
650 // Positional argument!
651 if (ActivePositionalArg) {
652 ProvidePositionalOption(ActivePositionalArg, argv[i], i);
653 continue; // We are done!
656 if (!PositionalOpts.empty()) {
657 PositionalVals.push_back(std::make_pair(argv[i],i));
659 // All of the positional arguments have been fulfulled, give the rest to
660 // the consume after option... if it's specified...
662 if (PositionalVals.size() >= NumPositionalRequired &&
663 ConsumeAfterOpt != 0) {
664 for (++i; i < argc; ++i)
665 PositionalVals.push_back(std::make_pair(argv[i],i));
666 break; // Handle outside of the argument processing loop...
669 // Delay processing positional arguments until the end...
672 } else if (argv[i][0] == '-' && argv[i][1] == '-' && argv[i][2] == 0 &&
674 DashDashFound = true; // This is the mythical "--"?
675 continue; // Don't try to process it as an argument itself.
676 } else if (ActivePositionalArg &&
677 (ActivePositionalArg->getMiscFlags() & PositionalEatsArgs)) {
678 // If there is a positional argument eating options, check to see if this
679 // option is another positional argument. If so, treat it as an argument,
680 // otherwise feed it to the eating positional.
682 // Eat leading dashes.
683 while (!ArgName.empty() && ArgName[0] == '-')
684 ArgName = ArgName.substr(1);
686 Handler = LookupOption(ArgName, Value, Opts);
687 if (!Handler || Handler->getFormattingFlag() != cl::Positional) {
688 ProvidePositionalOption(ActivePositionalArg, argv[i], i);
689 continue; // We are done!
692 } else { // We start with a '-', must be an argument.
694 // Eat leading dashes.
695 while (!ArgName.empty() && ArgName[0] == '-')
696 ArgName = ArgName.substr(1);
698 Handler = LookupOption(ArgName, Value, Opts);
700 // Check to see if this "option" is really a prefixed or grouped argument.
702 Handler = HandlePrefixedOrGroupedOption(ArgName, Value,
705 // Otherwise, look for the closest available option to report to the user
706 // in the upcoming error.
707 if (Handler == 0 && SinkOpts.empty())
708 NearestHandler = LookupNearestOption(ArgName, Opts,
709 NearestHandlerString);
713 if (SinkOpts.empty()) {
714 errs() << ProgramName << ": Unknown command line argument '"
715 << argv[i] << "'. Try: '" << argv[0] << " -help'\n";
717 if (NearestHandler) {
718 // If we know a near match, report it as well.
719 errs() << ProgramName << ": Did you mean '-"
720 << NearestHandlerString << "'?\n";
725 for (SmallVectorImpl<Option*>::iterator I = SinkOpts.begin(),
726 E = SinkOpts.end(); I != E ; ++I)
727 (*I)->addOccurrence(i, "", argv[i]);
732 // If this is a named positional argument, just remember that it is the
734 if (Handler->getFormattingFlag() == cl::Positional)
735 ActivePositionalArg = Handler;
737 ErrorParsing |= ProvideOption(Handler, ArgName, Value, argc, argv, i);
740 // Check and handle positional arguments now...
741 if (NumPositionalRequired > PositionalVals.size()) {
742 errs() << ProgramName
743 << ": Not enough positional command line arguments specified!\n"
744 << "Must specify at least " << NumPositionalRequired
745 << " positional arguments: See: " << argv[0] << " -help\n";
748 } else if (!HasUnlimitedPositionals &&
749 PositionalVals.size() > PositionalOpts.size()) {
750 errs() << ProgramName
751 << ": Too many positional arguments specified!\n"
752 << "Can specify at most " << PositionalOpts.size()
753 << " positional arguments: See: " << argv[0] << " -help\n";
756 } else if (ConsumeAfterOpt == 0) {
757 // Positional args have already been handled if ConsumeAfter is specified.
758 unsigned ValNo = 0, NumVals = static_cast<unsigned>(PositionalVals.size());
759 for (size_t i = 0, e = PositionalOpts.size(); i != e; ++i) {
760 if (RequiresValue(PositionalOpts[i])) {
761 ProvidePositionalOption(PositionalOpts[i], PositionalVals[ValNo].first,
762 PositionalVals[ValNo].second);
764 --NumPositionalRequired; // We fulfilled our duty...
767 // If we _can_ give this option more arguments, do so now, as long as we
768 // do not give it values that others need. 'Done' controls whether the
769 // option even _WANTS_ any more.
771 bool Done = PositionalOpts[i]->getNumOccurrencesFlag() == cl::Required;
772 while (NumVals-ValNo > NumPositionalRequired && !Done) {
773 switch (PositionalOpts[i]->getNumOccurrencesFlag()) {
775 Done = true; // Optional arguments want _at most_ one value
777 case cl::ZeroOrMore: // Zero or more will take all they can get...
778 case cl::OneOrMore: // One or more will take all they can get...
779 ProvidePositionalOption(PositionalOpts[i],
780 PositionalVals[ValNo].first,
781 PositionalVals[ValNo].second);
785 llvm_unreachable("Internal error, unexpected NumOccurrences flag in "
786 "positional argument processing!");
791 assert(ConsumeAfterOpt && NumPositionalRequired <= PositionalVals.size());
793 for (size_t j = 1, e = PositionalOpts.size(); j != e; ++j)
794 if (RequiresValue(PositionalOpts[j])) {
795 ErrorParsing |= ProvidePositionalOption(PositionalOpts[j],
796 PositionalVals[ValNo].first,
797 PositionalVals[ValNo].second);
801 // Handle the case where there is just one positional option, and it's
802 // optional. In this case, we want to give JUST THE FIRST option to the
803 // positional option and keep the rest for the consume after. The above
804 // loop would have assigned no values to positional options in this case.
806 if (PositionalOpts.size() == 2 && ValNo == 0 && !PositionalVals.empty()) {
807 ErrorParsing |= ProvidePositionalOption(PositionalOpts[1],
808 PositionalVals[ValNo].first,
809 PositionalVals[ValNo].second);
813 // Handle over all of the rest of the arguments to the
814 // cl::ConsumeAfter command line option...
815 for (; ValNo != PositionalVals.size(); ++ValNo)
816 ErrorParsing |= ProvidePositionalOption(ConsumeAfterOpt,
817 PositionalVals[ValNo].first,
818 PositionalVals[ValNo].second);
821 // Loop over args and make sure all required args are specified!
822 for (StringMap<Option*>::iterator I = Opts.begin(),
823 E = Opts.end(); I != E; ++I) {
824 switch (I->second->getNumOccurrencesFlag()) {
827 if (I->second->getNumOccurrences() == 0) {
828 I->second->error("must be specified at least once!");
837 // Now that we know if -debug is specified, we can use it.
838 // Note that if ReadResponseFiles == true, this must be done before the
839 // memory allocated for the expanded command line is free()d below.
840 DEBUG(dbgs() << "Args: ";
841 for (int i = 0; i < argc; ++i)
842 dbgs() << argv[i] << ' ';
846 // Free all of the memory allocated to the map. Command line options may only
847 // be processed once!
849 PositionalOpts.clear();
852 // Free the memory allocated by ExpandResponseFiles.
853 // Free all the strdup()ed strings.
854 for (std::vector<char*>::iterator i = newArgv.begin(), e = newArgv.end();
858 // If we had an error processing our arguments, don't let the program execute
859 if (ErrorParsing) exit(1);
862 //===----------------------------------------------------------------------===//
863 // Option Base class implementation
866 bool Option::error(const Twine &Message, StringRef ArgName) {
867 if (ArgName.data() == 0) ArgName = ArgStr;
869 errs() << HelpStr; // Be nice for positional arguments
871 errs() << ProgramName << ": for the -" << ArgName;
873 errs() << " option: " << Message << "\n";
877 bool Option::addOccurrence(unsigned pos, StringRef ArgName,
878 StringRef Value, bool MultiArg) {
880 NumOccurrences++; // Increment the number of times we have been seen
882 switch (getNumOccurrencesFlag()) {
884 if (NumOccurrences > 1)
885 return error("may only occur zero or one times!", ArgName);
888 if (NumOccurrences > 1)
889 return error("must occur exactly one time!", ArgName);
893 case ConsumeAfter: break;
896 return handleOccurrence(pos, ArgName, Value);
900 // getValueStr - Get the value description string, using "DefaultMsg" if nothing
901 // has been specified yet.
903 static const char *getValueStr(const Option &O, const char *DefaultMsg) {
904 if (O.ValueStr[0] == 0) return DefaultMsg;
908 //===----------------------------------------------------------------------===//
909 // cl::alias class implementation
912 // Return the width of the option tag for printing...
913 size_t alias::getOptionWidth() const {
914 return std::strlen(ArgStr)+6;
917 static void printHelpStr(StringRef HelpStr, size_t Indent,
918 size_t FirstLineIndentedBy) {
919 std::pair<StringRef, StringRef> Split = HelpStr.split('\n');
920 outs().indent(Indent - FirstLineIndentedBy) << " - " << Split.first << "\n";
921 while (!Split.second.empty()) {
922 Split = Split.second.split('\n');
923 outs().indent(Indent) << Split.first << "\n";
927 // Print out the option for the alias.
928 void alias::printOptionInfo(size_t GlobalWidth) const {
929 outs() << " -" << ArgStr;
930 printHelpStr(HelpStr, GlobalWidth, std::strlen(ArgStr) + 6);
933 //===----------------------------------------------------------------------===//
934 // Parser Implementation code...
937 // basic_parser implementation
940 // Return the width of the option tag for printing...
941 size_t basic_parser_impl::getOptionWidth(const Option &O) const {
942 size_t Len = std::strlen(O.ArgStr);
943 if (const char *ValName = getValueName())
944 Len += std::strlen(getValueStr(O, ValName))+3;
949 // printOptionInfo - Print out information about this option. The
950 // to-be-maintained width is specified.
952 void basic_parser_impl::printOptionInfo(const Option &O,
953 size_t GlobalWidth) const {
954 outs() << " -" << O.ArgStr;
956 if (const char *ValName = getValueName())
957 outs() << "=<" << getValueStr(O, ValName) << '>';
959 printHelpStr(O.HelpStr, GlobalWidth, getOptionWidth(O));
962 void basic_parser_impl::printOptionName(const Option &O,
963 size_t GlobalWidth) const {
964 outs() << " -" << O.ArgStr;
965 outs().indent(GlobalWidth-std::strlen(O.ArgStr));
969 // parser<bool> implementation
971 bool parser<bool>::parse(Option &O, StringRef ArgName,
972 StringRef Arg, bool &Value) {
973 if (Arg == "" || Arg == "true" || Arg == "TRUE" || Arg == "True" ||
979 if (Arg == "false" || Arg == "FALSE" || Arg == "False" || Arg == "0") {
983 return O.error("'" + Arg +
984 "' is invalid value for boolean argument! Try 0 or 1");
987 // parser<boolOrDefault> implementation
989 bool parser<boolOrDefault>::parse(Option &O, StringRef ArgName,
990 StringRef Arg, boolOrDefault &Value) {
991 if (Arg == "" || Arg == "true" || Arg == "TRUE" || Arg == "True" ||
996 if (Arg == "false" || Arg == "FALSE" || Arg == "False" || Arg == "0") {
1001 return O.error("'" + Arg +
1002 "' is invalid value for boolean argument! Try 0 or 1");
1005 // parser<int> implementation
1007 bool parser<int>::parse(Option &O, StringRef ArgName,
1008 StringRef Arg, int &Value) {
1009 if (Arg.getAsInteger(0, Value))
1010 return O.error("'" + Arg + "' value invalid for integer argument!");
1014 // parser<unsigned> implementation
1016 bool parser<unsigned>::parse(Option &O, StringRef ArgName,
1017 StringRef Arg, unsigned &Value) {
1019 if (Arg.getAsInteger(0, Value))
1020 return O.error("'" + Arg + "' value invalid for uint argument!");
1024 // parser<unsigned long long> implementation
1026 bool parser<unsigned long long>::parse(Option &O, StringRef ArgName,
1027 StringRef Arg, unsigned long long &Value){
1029 if (Arg.getAsInteger(0, Value))
1030 return O.error("'" + Arg + "' value invalid for uint argument!");
1034 // parser<double>/parser<float> implementation
1036 static bool parseDouble(Option &O, StringRef Arg, double &Value) {
1037 SmallString<32> TmpStr(Arg.begin(), Arg.end());
1038 const char *ArgStart = TmpStr.c_str();
1040 Value = strtod(ArgStart, &End);
1042 return O.error("'" + Arg + "' value invalid for floating point argument!");
1046 bool parser<double>::parse(Option &O, StringRef ArgName,
1047 StringRef Arg, double &Val) {
1048 return parseDouble(O, Arg, Val);
1051 bool parser<float>::parse(Option &O, StringRef ArgName,
1052 StringRef Arg, float &Val) {
1054 if (parseDouble(O, Arg, dVal))
1062 // generic_parser_base implementation
1065 // findOption - Return the option number corresponding to the specified
1066 // argument string. If the option is not found, getNumOptions() is returned.
1068 unsigned generic_parser_base::findOption(const char *Name) {
1069 unsigned e = getNumOptions();
1071 for (unsigned i = 0; i != e; ++i) {
1072 if (strcmp(getOption(i), Name) == 0)
1079 // Return the width of the option tag for printing...
1080 size_t generic_parser_base::getOptionWidth(const Option &O) const {
1081 if (O.hasArgStr()) {
1082 size_t Size = std::strlen(O.ArgStr)+6;
1083 for (unsigned i = 0, e = getNumOptions(); i != e; ++i)
1084 Size = std::max(Size, std::strlen(getOption(i))+8);
1087 size_t BaseSize = 0;
1088 for (unsigned i = 0, e = getNumOptions(); i != e; ++i)
1089 BaseSize = std::max(BaseSize, std::strlen(getOption(i))+8);
1094 // printOptionInfo - Print out information about this option. The
1095 // to-be-maintained width is specified.
1097 void generic_parser_base::printOptionInfo(const Option &O,
1098 size_t GlobalWidth) const {
1099 if (O.hasArgStr()) {
1100 outs() << " -" << O.ArgStr;
1101 printHelpStr(O.HelpStr, GlobalWidth, std::strlen(O.ArgStr) + 6);
1103 for (unsigned i = 0, e = getNumOptions(); i != e; ++i) {
1104 size_t NumSpaces = GlobalWidth-strlen(getOption(i))-8;
1105 outs() << " =" << getOption(i);
1106 outs().indent(NumSpaces) << " - " << getDescription(i) << '\n';
1110 outs() << " " << O.HelpStr << '\n';
1111 for (unsigned i = 0, e = getNumOptions(); i != e; ++i) {
1112 const char *Option = getOption(i);
1113 outs() << " -" << Option;
1114 printHelpStr(getDescription(i), GlobalWidth, std::strlen(Option) + 8);
1119 static const size_t MaxOptWidth = 8; // arbitrary spacing for printOptionDiff
1121 // printGenericOptionDiff - Print the value of this option and it's default.
1123 // "Generic" options have each value mapped to a name.
1124 void generic_parser_base::
1125 printGenericOptionDiff(const Option &O, const GenericOptionValue &Value,
1126 const GenericOptionValue &Default,
1127 size_t GlobalWidth) const {
1128 outs() << " -" << O.ArgStr;
1129 outs().indent(GlobalWidth-std::strlen(O.ArgStr));
1131 unsigned NumOpts = getNumOptions();
1132 for (unsigned i = 0; i != NumOpts; ++i) {
1133 if (Value.compare(getOptionValue(i)))
1136 outs() << "= " << getOption(i);
1137 size_t L = std::strlen(getOption(i));
1138 size_t NumSpaces = MaxOptWidth > L ? MaxOptWidth - L : 0;
1139 outs().indent(NumSpaces) << " (default: ";
1140 for (unsigned j = 0; j != NumOpts; ++j) {
1141 if (Default.compare(getOptionValue(j)))
1143 outs() << getOption(j);
1149 outs() << "= *unknown option value*\n";
1152 // printOptionDiff - Specializations for printing basic value types.
1154 #define PRINT_OPT_DIFF(T) \
1156 printOptionDiff(const Option &O, T V, OptionValue<T> D, \
1157 size_t GlobalWidth) const { \
1158 printOptionName(O, GlobalWidth); \
1161 raw_string_ostream SS(Str); \
1164 outs() << "= " << Str; \
1165 size_t NumSpaces = MaxOptWidth > Str.size() ? MaxOptWidth - Str.size() : 0;\
1166 outs().indent(NumSpaces) << " (default: "; \
1168 outs() << D.getValue(); \
1170 outs() << "*no default*"; \
1174 PRINT_OPT_DIFF(bool)
1175 PRINT_OPT_DIFF(boolOrDefault)
1177 PRINT_OPT_DIFF(unsigned)
1178 PRINT_OPT_DIFF(unsigned long long)
1179 PRINT_OPT_DIFF(double)
1180 PRINT_OPT_DIFF(float)
1181 PRINT_OPT_DIFF(char)
1183 void parser<std::string>::
1184 printOptionDiff(const Option &O, StringRef V, OptionValue<std::string> D,
1185 size_t GlobalWidth) const {
1186 printOptionName(O, GlobalWidth);
1187 outs() << "= " << V;
1188 size_t NumSpaces = MaxOptWidth > V.size() ? MaxOptWidth - V.size() : 0;
1189 outs().indent(NumSpaces) << " (default: ";
1191 outs() << D.getValue();
1193 outs() << "*no default*";
1197 // Print a placeholder for options that don't yet support printOptionDiff().
1198 void basic_parser_impl::
1199 printOptionNoValue(const Option &O, size_t GlobalWidth) const {
1200 printOptionName(O, GlobalWidth);
1201 outs() << "= *cannot print option value*\n";
1204 //===----------------------------------------------------------------------===//
1205 // -help and -help-hidden option implementation
1208 static int OptNameCompare(const void *LHS, const void *RHS) {
1209 typedef std::pair<const char *, Option*> pair_ty;
1211 return strcmp(((const pair_ty*)LHS)->first, ((const pair_ty*)RHS)->first);
1214 // Copy Options into a vector so we can sort them as we like.
1216 sortOpts(StringMap<Option*> &OptMap,
1217 SmallVectorImpl< std::pair<const char *, Option*> > &Opts,
1219 SmallPtrSet<Option*, 128> OptionSet; // Duplicate option detection.
1221 for (StringMap<Option*>::iterator I = OptMap.begin(), E = OptMap.end();
1223 // Ignore really-hidden options.
1224 if (I->second->getOptionHiddenFlag() == ReallyHidden)
1227 // Unless showhidden is set, ignore hidden flags.
1228 if (I->second->getOptionHiddenFlag() == Hidden && !ShowHidden)
1231 // If we've already seen this option, don't add it to the list again.
1232 if (!OptionSet.insert(I->second))
1235 Opts.push_back(std::pair<const char *, Option*>(I->getKey().data(),
1239 // Sort the options list alphabetically.
1240 qsort(Opts.data(), Opts.size(), sizeof(Opts[0]), OptNameCompare);
1247 const bool ShowHidden;
1248 typedef SmallVector<std::pair<const char *, Option*>,128> StrOptionPairVector;
1249 // Print the options. Opts is assumed to be alphabetically sorted.
1250 virtual void printOptions(StrOptionPairVector &Opts, size_t MaxArgLen) {
1251 for (size_t i = 0, e = Opts.size(); i != e; ++i)
1252 Opts[i].second->printOptionInfo(MaxArgLen);
1256 explicit HelpPrinter(bool showHidden) : ShowHidden(showHidden) {}
1257 virtual ~HelpPrinter() {}
1259 // Invoke the printer.
1260 void operator=(bool Value) {
1261 if (Value == false) return;
1263 // Get all the options.
1264 SmallVector<Option*, 4> PositionalOpts;
1265 SmallVector<Option*, 4> SinkOpts;
1266 StringMap<Option*> OptMap;
1267 GetOptionInfo(PositionalOpts, SinkOpts, OptMap);
1269 StrOptionPairVector Opts;
1270 sortOpts(OptMap, Opts, ShowHidden);
1272 if (ProgramOverview)
1273 outs() << "OVERVIEW: " << ProgramOverview << "\n";
1275 outs() << "USAGE: " << ProgramName << " [options]";
1277 // Print out the positional options.
1278 Option *CAOpt = 0; // The cl::ConsumeAfter option, if it exists...
1279 if (!PositionalOpts.empty() &&
1280 PositionalOpts[0]->getNumOccurrencesFlag() == ConsumeAfter)
1281 CAOpt = PositionalOpts[0];
1283 for (size_t i = CAOpt != 0, e = PositionalOpts.size(); i != e; ++i) {
1284 if (PositionalOpts[i]->ArgStr[0])
1285 outs() << " --" << PositionalOpts[i]->ArgStr;
1286 outs() << " " << PositionalOpts[i]->HelpStr;
1289 // Print the consume after option info if it exists...
1290 if (CAOpt) outs() << " " << CAOpt->HelpStr;
1294 // Compute the maximum argument length...
1295 size_t MaxArgLen = 0;
1296 for (size_t i = 0, e = Opts.size(); i != e; ++i)
1297 MaxArgLen = std::max(MaxArgLen, Opts[i].second->getOptionWidth());
1299 outs() << "OPTIONS:\n";
1300 printOptions(Opts, MaxArgLen);
1302 // Print any extra help the user has declared.
1303 for (std::vector<const char *>::iterator I = MoreHelp->begin(),
1304 E = MoreHelp->end();
1309 // Halt the program since help information was printed
1314 class CategorizedHelpPrinter : public HelpPrinter {
1316 explicit CategorizedHelpPrinter(bool showHidden) : HelpPrinter(showHidden) {}
1318 // Helper function for printOptions().
1319 // It shall return true if A's name should be lexographically
1320 // ordered before B's name. It returns false otherwise.
1321 static bool OptionCategoryCompare(OptionCategory *A, OptionCategory *B) {
1322 int Length = strcmp(A->getName(), B->getName());
1323 assert(Length != 0 && "Duplicate option categories");
1327 // Make sure we inherit our base class's operator=()
1328 using HelpPrinter::operator= ;
1331 virtual void printOptions(StrOptionPairVector &Opts, size_t MaxArgLen) {
1332 std::vector<OptionCategory *> SortedCategories;
1333 std::map<OptionCategory *, std::vector<Option *> > CategorizedOptions;
1335 // Collect registered option categories into vector in preperation for
1337 for (OptionCatSet::const_iterator I = RegisteredOptionCategories->begin(),
1338 E = RegisteredOptionCategories->end();
1340 SortedCategories.push_back(*I);
1342 // Sort the different option categories alphabetically.
1343 assert(SortedCategories.size() > 0 && "No option categories registered!");
1344 std::sort(SortedCategories.begin(), SortedCategories.end(),
1345 OptionCategoryCompare);
1347 // Create map to empty vectors.
1348 for (std::vector<OptionCategory *>::const_iterator
1349 I = SortedCategories.begin(),
1350 E = SortedCategories.end();
1352 CategorizedOptions[*I] = std::vector<Option *>();
1354 // Walk through pre-sorted options and assign into categories.
1355 // Because the options are already alphabetically sorted the
1356 // options within categories will also be alphabetically sorted.
1357 for (size_t I = 0, E = Opts.size(); I != E; ++I) {
1358 Option *Opt = Opts[I].second;
1359 assert(CategorizedOptions.count(Opt->Category) > 0 &&
1360 "Option has an unregistered category");
1361 CategorizedOptions[Opt->Category].push_back(Opt);
1365 for (std::vector<OptionCategory *>::const_iterator
1366 Category = SortedCategories.begin(),
1367 E = SortedCategories.end();
1368 Category != E; ++Category) {
1369 // Hide empty categories for -help, but show for -help-hidden.
1370 bool IsEmptyCategory = CategorizedOptions[*Category].size() == 0;
1371 if (!ShowHidden && IsEmptyCategory)
1374 // Print category information.
1376 outs() << (*Category)->getName() << ":\n";
1378 // Check if description is set.
1379 if ((*Category)->getDescription() != 0)
1380 outs() << (*Category)->getDescription() << "\n\n";
1384 // When using -help-hidden explicitly state if the category has no
1385 // options associated with it.
1386 if (IsEmptyCategory) {
1387 outs() << " This option category has no options.\n";
1390 // Loop over the options in the category and print.
1391 for (std::vector<Option *>::const_iterator
1392 Opt = CategorizedOptions[*Category].begin(),
1393 E = CategorizedOptions[*Category].end();
1395 (*Opt)->printOptionInfo(MaxArgLen);
1400 // This wraps the Uncategorizing and Categorizing printers and decides
1401 // at run time which should be invoked.
1402 class HelpPrinterWrapper {
1404 HelpPrinter &UncategorizedPrinter;
1405 CategorizedHelpPrinter &CategorizedPrinter;
1408 explicit HelpPrinterWrapper(HelpPrinter &UncategorizedPrinter,
1409 CategorizedHelpPrinter &CategorizedPrinter) :
1410 UncategorizedPrinter(UncategorizedPrinter),
1411 CategorizedPrinter(CategorizedPrinter) { }
1413 // Invoke the printer.
1414 void operator=(bool Value);
1417 } // End anonymous namespace
1419 // Declare the four HelpPrinter instances that are used to print out help, or
1420 // help-hidden as an uncategorized list or in categories.
1421 static HelpPrinter UncategorizedNormalPrinter(false);
1422 static HelpPrinter UncategorizedHiddenPrinter(true);
1423 static CategorizedHelpPrinter CategorizedNormalPrinter(false);
1424 static CategorizedHelpPrinter CategorizedHiddenPrinter(true);
1427 // Declare HelpPrinter wrappers that will decide whether or not to invoke
1428 // a categorizing help printer
1429 static HelpPrinterWrapper WrappedNormalPrinter(UncategorizedNormalPrinter,
1430 CategorizedNormalPrinter);
1431 static HelpPrinterWrapper WrappedHiddenPrinter(UncategorizedHiddenPrinter,
1432 CategorizedHiddenPrinter);
1434 // Define uncategorized help printers.
1435 // -help-list is hidden by default because if Option categories are being used
1436 // then -help behaves the same as -help-list.
1437 static cl::opt<HelpPrinter, true, parser<bool> >
1439 cl::desc("Display list of available options (-help-list-hidden for more)"),
1440 cl::location(UncategorizedNormalPrinter), cl::Hidden, cl::ValueDisallowed);
1442 static cl::opt<HelpPrinter, true, parser<bool> >
1443 HLHOp("help-list-hidden",
1444 cl::desc("Display list of all available options"),
1445 cl::location(UncategorizedHiddenPrinter), cl::Hidden, cl::ValueDisallowed);
1447 // Define uncategorized/categorized help printers. These printers change their
1448 // behaviour at runtime depending on whether one or more Option categories have
1450 static cl::opt<HelpPrinterWrapper, true, parser<bool> >
1451 HOp("help", cl::desc("Display available options (-help-hidden for more)"),
1452 cl::location(WrappedNormalPrinter), cl::ValueDisallowed);
1454 static cl::opt<HelpPrinterWrapper, true, parser<bool> >
1455 HHOp("help-hidden", cl::desc("Display all available options"),
1456 cl::location(WrappedHiddenPrinter), cl::Hidden, cl::ValueDisallowed);
1460 static cl::opt<bool>
1461 PrintOptions("print-options",
1462 cl::desc("Print non-default options after command line parsing"),
1463 cl::Hidden, cl::init(false));
1465 static cl::opt<bool>
1466 PrintAllOptions("print-all-options",
1467 cl::desc("Print all option values after command line parsing"),
1468 cl::Hidden, cl::init(false));
1470 void HelpPrinterWrapper::operator=(bool Value) {
1474 // Decide which printer to invoke. If more than one option category is
1475 // registered then it is useful to show the categorized help instead of
1476 // uncategorized help.
1477 if (RegisteredOptionCategories->size() > 1) {
1478 // unhide -help-list option so user can have uncategorized output if they
1480 HLOp.setHiddenFlag(NotHidden);
1482 CategorizedPrinter = true; // Invoke categorized printer
1485 UncategorizedPrinter = true; // Invoke uncategorized printer
1488 // Print the value of each option.
1489 void cl::PrintOptionValues() {
1490 if (!PrintOptions && !PrintAllOptions) return;
1492 // Get all the options.
1493 SmallVector<Option*, 4> PositionalOpts;
1494 SmallVector<Option*, 4> SinkOpts;
1495 StringMap<Option*> OptMap;
1496 GetOptionInfo(PositionalOpts, SinkOpts, OptMap);
1498 SmallVector<std::pair<const char *, Option*>, 128> Opts;
1499 sortOpts(OptMap, Opts, /*ShowHidden*/true);
1501 // Compute the maximum argument length...
1502 size_t MaxArgLen = 0;
1503 for (size_t i = 0, e = Opts.size(); i != e; ++i)
1504 MaxArgLen = std::max(MaxArgLen, Opts[i].second->getOptionWidth());
1506 for (size_t i = 0, e = Opts.size(); i != e; ++i)
1507 Opts[i].second->printOptionValue(MaxArgLen, PrintAllOptions);
1510 static void (*OverrideVersionPrinter)() = 0;
1512 static std::vector<void (*)()>* ExtraVersionPrinters = 0;
1515 class VersionPrinter {
1518 raw_ostream &OS = outs();
1519 OS << "LLVM (http://llvm.org/):\n"
1520 << " " << PACKAGE_NAME << " version " << PACKAGE_VERSION;
1521 #ifdef LLVM_VERSION_INFO
1522 OS << LLVM_VERSION_INFO;
1525 #ifndef __OPTIMIZE__
1526 OS << "DEBUG build";
1528 OS << "Optimized build";
1531 OS << " with assertions";
1533 std::string CPU = sys::getHostCPUName();
1534 if (CPU == "generic") CPU = "(unknown)";
1536 #if (ENABLE_TIMESTAMPS == 1)
1537 << " Built " << __DATE__ << " (" << __TIME__ << ").\n"
1539 << " Default target: " << sys::getDefaultTargetTriple() << '\n'
1540 << " Host CPU: " << CPU << '\n';
1542 void operator=(bool OptionWasSpecified) {
1543 if (!OptionWasSpecified) return;
1545 if (OverrideVersionPrinter != 0) {
1546 (*OverrideVersionPrinter)();
1551 // Iterate over any registered extra printers and call them to add further
1553 if (ExtraVersionPrinters != 0) {
1555 for (std::vector<void (*)()>::iterator I = ExtraVersionPrinters->begin(),
1556 E = ExtraVersionPrinters->end();
1564 } // End anonymous namespace
1567 // Define the --version option that prints out the LLVM version for the tool
1568 static VersionPrinter VersionPrinterInstance;
1570 static cl::opt<VersionPrinter, true, parser<bool> >
1571 VersOp("version", cl::desc("Display the version of this program"),
1572 cl::location(VersionPrinterInstance), cl::ValueDisallowed);
1574 // Utility function for printing the help message.
1575 void cl::PrintHelpMessage(bool Hidden, bool Categorized) {
1576 // This looks weird, but it actually prints the help message. The Printers are
1577 // types of HelpPrinter and the help gets printed when its operator= is
1578 // invoked. That's because the "normal" usages of the help printer is to be
1579 // assigned true/false depending on whether -help or -help-hidden was given or
1580 // not. Since we're circumventing that we have to make it look like -help or
1581 // -help-hidden were given, so we assign true.
1583 if (!Hidden && !Categorized)
1584 UncategorizedNormalPrinter = true;
1585 else if (!Hidden && Categorized)
1586 CategorizedNormalPrinter = true;
1587 else if (Hidden && !Categorized)
1588 UncategorizedHiddenPrinter = true;
1590 CategorizedHiddenPrinter = true;
1593 /// Utility function for printing version number.
1594 void cl::PrintVersionMessage() {
1595 VersionPrinterInstance.print();
1598 void cl::SetVersionPrinter(void (*func)()) {
1599 OverrideVersionPrinter = func;
1602 void cl::AddExtraVersionPrinter(void (*func)()) {
1603 if (ExtraVersionPrinters == 0)
1604 ExtraVersionPrinters = new std::vector<void (*)()>;
1606 ExtraVersionPrinters->push_back(func);
1609 void cl::getRegisteredOptions(StringMap<Option*> &Map)
1611 // Get all the options.
1612 SmallVector<Option*, 4> PositionalOpts; //NOT USED
1613 SmallVector<Option*, 4> SinkOpts; //NOT USED
1614 assert(Map.size() == 0 && "StringMap must be empty");
1615 GetOptionInfo(PositionalOpts, SinkOpts, Map);