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-c/Support.h"
21 #include "llvm/ADT/ArrayRef.h"
22 #include "llvm/ADT/Optional.h"
23 #include "llvm/ADT/STLExtras.h"
24 #include "llvm/ADT/SmallPtrSet.h"
25 #include "llvm/ADT/SmallString.h"
26 #include "llvm/ADT/StringExtras.h"
27 #include "llvm/ADT/StringMap.h"
28 #include "llvm/ADT/Triple.h"
29 #include "llvm/ADT/Twine.h"
30 #include "llvm/Config/config.h"
31 #include "llvm/Support/ConvertUTF.h"
32 #include "llvm/Support/Debug.h"
33 #include "llvm/Support/ErrorHandling.h"
34 #include "llvm/Support/FileSystem.h"
35 #include "llvm/Support/Host.h"
36 #include "llvm/Support/ManagedStatic.h"
37 #include "llvm/Support/MemoryBuffer.h"
38 #include "llvm/Support/Path.h"
39 #include "llvm/Support/Process.h"
40 #include "llvm/Support/StringSaver.h"
41 #include "llvm/Support/raw_ostream.h"
47 #define DEBUG_TYPE "commandline"
49 //===----------------------------------------------------------------------===//
50 // Template instantiations and anchors.
54 template class basic_parser<bool>;
55 template class basic_parser<boolOrDefault>;
56 template class basic_parser<int>;
57 template class basic_parser<unsigned>;
58 template class basic_parser<unsigned long long>;
59 template class basic_parser<double>;
60 template class basic_parser<float>;
61 template class basic_parser<std::string>;
62 template class basic_parser<char>;
64 template class opt<unsigned>;
65 template class opt<int>;
66 template class opt<std::string>;
67 template class opt<char>;
68 template class opt<bool>;
70 } // end namespace llvm::cl
72 // Pin the vtables to this file.
73 void GenericOptionValue::anchor() {}
74 void OptionValue<boolOrDefault>::anchor() {}
75 void OptionValue<std::string>::anchor() {}
76 void Option::anchor() {}
77 void basic_parser_impl::anchor() {}
78 void parser<bool>::anchor() {}
79 void parser<boolOrDefault>::anchor() {}
80 void parser<int>::anchor() {}
81 void parser<unsigned>::anchor() {}
82 void parser<unsigned long long>::anchor() {}
83 void parser<double>::anchor() {}
84 void parser<float>::anchor() {}
85 void parser<std::string>::anchor() {}
86 void parser<char>::anchor() {}
88 //===----------------------------------------------------------------------===//
92 class CommandLineParser {
94 // Globals for name and overview of program. Program name is not a string to
95 // avoid static ctor/dtor issues.
96 std::string ProgramName;
97 StringRef ProgramOverview;
99 // This collects additional help to be printed.
100 std::vector<StringRef> MoreHelp;
102 // This collects the different option categories that have been registered.
103 SmallPtrSet<OptionCategory *, 16> RegisteredOptionCategories;
105 // This collects the different subcommands that have been registered.
106 SmallPtrSet<SubCommand *, 4> RegisteredSubCommands;
108 CommandLineParser() : ActiveSubCommand(nullptr) {
109 registerSubCommand(&*TopLevelSubCommand);
110 registerSubCommand(&*AllSubCommands);
113 void ResetAllOptionOccurrences();
115 bool ParseCommandLineOptions(int argc, const char *const *argv,
116 StringRef Overview, raw_ostream *Errs = nullptr);
118 void addLiteralOption(Option &Opt, SubCommand *SC, StringRef Name) {
121 if (!SC->OptionsMap.insert(std::make_pair(Name, &Opt)).second) {
122 errs() << ProgramName << ": CommandLine Error: Option '" << Name
123 << "' registered more than once!\n";
124 report_fatal_error("inconsistency in registered CommandLine options");
127 // If we're adding this to all sub-commands, add it to the ones that have
128 // already been registered.
129 if (SC == &*AllSubCommands) {
130 for (const auto &Sub : RegisteredSubCommands) {
133 addLiteralOption(Opt, Sub, Name);
138 void addLiteralOption(Option &Opt, StringRef Name) {
139 if (Opt.Subs.empty())
140 addLiteralOption(Opt, &*TopLevelSubCommand, Name);
142 for (auto SC : Opt.Subs)
143 addLiteralOption(Opt, SC, Name);
147 void addOption(Option *O, SubCommand *SC) {
148 bool HadErrors = false;
149 if (O->hasArgStr()) {
150 // Add argument to the argument map!
151 if (!SC->OptionsMap.insert(std::make_pair(O->ArgStr, O)).second) {
152 errs() << ProgramName << ": CommandLine Error: Option '" << O->ArgStr
153 << "' registered more than once!\n";
158 // Remember information about positional options.
159 if (O->getFormattingFlag() == cl::Positional)
160 SC->PositionalOpts.push_back(O);
161 else if (O->getMiscFlags() & cl::Sink) // Remember sink options
162 SC->SinkOpts.push_back(O);
163 else if (O->getNumOccurrencesFlag() == cl::ConsumeAfter) {
164 if (SC->ConsumeAfterOpt) {
165 O->error("Cannot specify more than one option with cl::ConsumeAfter!");
168 SC->ConsumeAfterOpt = O;
171 // Fail hard if there were errors. These are strictly unrecoverable and
172 // indicate serious issues such as conflicting option names or an
174 // linked LLVM distribution.
176 report_fatal_error("inconsistency in registered CommandLine options");
178 // If we're adding this to all sub-commands, add it to the ones that have
179 // already been registered.
180 if (SC == &*AllSubCommands) {
181 for (const auto &Sub : RegisteredSubCommands) {
189 void addOption(Option *O) {
190 if (O->Subs.empty()) {
191 addOption(O, &*TopLevelSubCommand);
193 for (auto SC : O->Subs)
198 void removeOption(Option *O, SubCommand *SC) {
199 SmallVector<StringRef, 16> OptionNames;
200 O->getExtraOptionNames(OptionNames);
202 OptionNames.push_back(O->ArgStr);
204 SubCommand &Sub = *SC;
205 for (auto Name : OptionNames)
206 Sub.OptionsMap.erase(Name);
208 if (O->getFormattingFlag() == cl::Positional)
209 for (auto Opt = Sub.PositionalOpts.begin();
210 Opt != Sub.PositionalOpts.end(); ++Opt) {
212 Sub.PositionalOpts.erase(Opt);
216 else if (O->getMiscFlags() & cl::Sink)
217 for (auto Opt = Sub.SinkOpts.begin(); Opt != Sub.SinkOpts.end(); ++Opt) {
219 Sub.SinkOpts.erase(Opt);
223 else if (O == Sub.ConsumeAfterOpt)
224 Sub.ConsumeAfterOpt = nullptr;
227 void removeOption(Option *O) {
229 removeOption(O, &*TopLevelSubCommand);
231 if (O->isInAllSubCommands()) {
232 for (auto SC : RegisteredSubCommands)
235 for (auto SC : O->Subs)
241 bool hasOptions(const SubCommand &Sub) const {
242 return (!Sub.OptionsMap.empty() || !Sub.PositionalOpts.empty() ||
243 nullptr != Sub.ConsumeAfterOpt);
246 bool hasOptions() const {
247 for (const auto &S : RegisteredSubCommands) {
254 SubCommand *getActiveSubCommand() { return ActiveSubCommand; }
256 void updateArgStr(Option *O, StringRef NewName, SubCommand *SC) {
257 SubCommand &Sub = *SC;
258 if (!Sub.OptionsMap.insert(std::make_pair(NewName, O)).second) {
259 errs() << ProgramName << ": CommandLine Error: Option '" << O->ArgStr
260 << "' registered more than once!\n";
261 report_fatal_error("inconsistency in registered CommandLine options");
263 Sub.OptionsMap.erase(O->ArgStr);
266 void updateArgStr(Option *O, StringRef NewName) {
268 updateArgStr(O, NewName, &*TopLevelSubCommand);
270 for (auto SC : O->Subs)
271 updateArgStr(O, NewName, SC);
275 void printOptionValues();
277 void registerCategory(OptionCategory *cat) {
278 assert(count_if(RegisteredOptionCategories,
279 [cat](const OptionCategory *Category) {
280 return cat->getName() == Category->getName();
282 "Duplicate option categories");
284 RegisteredOptionCategories.insert(cat);
287 void registerSubCommand(SubCommand *sub) {
288 assert(count_if(RegisteredSubCommands,
289 [sub](const SubCommand *Sub) {
290 return (!sub->getName().empty()) &&
291 (Sub->getName() == sub->getName());
293 "Duplicate subcommands");
294 RegisteredSubCommands.insert(sub);
296 // For all options that have been registered for all subcommands, add the
297 // option to this subcommand now.
298 if (sub != &*AllSubCommands) {
299 for (auto &E : AllSubCommands->OptionsMap) {
300 Option *O = E.second;
301 if ((O->isPositional() || O->isSink() || O->isConsumeAfter()) ||
305 addLiteralOption(*O, sub, E.first());
310 void unregisterSubCommand(SubCommand *sub) {
311 RegisteredSubCommands.erase(sub);
314 iterator_range<typename SmallPtrSet<SubCommand *, 4>::iterator>
315 getRegisteredSubcommands() {
316 return make_range(RegisteredSubCommands.begin(),
317 RegisteredSubCommands.end());
321 ActiveSubCommand = nullptr;
323 ProgramOverview = StringRef();
326 RegisteredOptionCategories.clear();
328 ResetAllOptionOccurrences();
329 RegisteredSubCommands.clear();
331 TopLevelSubCommand->reset();
332 AllSubCommands->reset();
333 registerSubCommand(&*TopLevelSubCommand);
334 registerSubCommand(&*AllSubCommands);
338 SubCommand *ActiveSubCommand;
340 Option *LookupOption(SubCommand &Sub, StringRef &Arg, StringRef &Value);
341 SubCommand *LookupSubCommand(StringRef Name);
346 static ManagedStatic<CommandLineParser> GlobalParser;
348 void cl::AddLiteralOption(Option &O, StringRef Name) {
349 GlobalParser->addLiteralOption(O, Name);
352 extrahelp::extrahelp(StringRef Help) : morehelp(Help) {
353 GlobalParser->MoreHelp.push_back(Help);
356 void Option::addArgument() {
357 GlobalParser->addOption(this);
358 FullyInitialized = true;
361 void Option::removeArgument() { GlobalParser->removeOption(this); }
363 void Option::setArgStr(StringRef S) {
364 if (FullyInitialized)
365 GlobalParser->updateArgStr(this, S);
366 assert((S.empty() || S[0] != '-') && "Option can't start with '-");
370 // Initialise the general option category.
371 OptionCategory llvm::cl::GeneralCategory("General options");
373 void OptionCategory::registerCategory() {
374 GlobalParser->registerCategory(this);
377 // A special subcommand representing no subcommand
378 ManagedStatic<SubCommand> llvm::cl::TopLevelSubCommand;
380 // A special subcommand that can be used to put an option into all subcommands.
381 ManagedStatic<SubCommand> llvm::cl::AllSubCommands;
383 void SubCommand::registerSubCommand() {
384 GlobalParser->registerSubCommand(this);
387 void SubCommand::unregisterSubCommand() {
388 GlobalParser->unregisterSubCommand(this);
391 void SubCommand::reset() {
392 PositionalOpts.clear();
396 ConsumeAfterOpt = nullptr;
399 SubCommand::operator bool() const {
400 return (GlobalParser->getActiveSubCommand() == this);
403 //===----------------------------------------------------------------------===//
404 // Basic, shared command line option processing machinery.
407 /// LookupOption - Lookup the option specified by the specified option on the
408 /// command line. If there is a value specified (after an equal sign) return
409 /// that as well. This assumes that leading dashes have already been stripped.
410 Option *CommandLineParser::LookupOption(SubCommand &Sub, StringRef &Arg,
412 // Reject all dashes.
415 assert(&Sub != &*AllSubCommands);
417 size_t EqualPos = Arg.find('=');
419 // If we have an equals sign, remember the value.
420 if (EqualPos == StringRef::npos) {
421 // Look up the option.
422 auto I = Sub.OptionsMap.find(Arg);
423 if (I == Sub.OptionsMap.end())
426 return I != Sub.OptionsMap.end() ? I->second : nullptr;
429 // If the argument before the = is a valid option name, we match. If not,
430 // return Arg unmolested.
431 auto I = Sub.OptionsMap.find(Arg.substr(0, EqualPos));
432 if (I == Sub.OptionsMap.end())
435 Value = Arg.substr(EqualPos + 1);
436 Arg = Arg.substr(0, EqualPos);
440 SubCommand *CommandLineParser::LookupSubCommand(StringRef Name) {
442 return &*TopLevelSubCommand;
443 for (auto S : RegisteredSubCommands) {
444 if (S == &*AllSubCommands)
446 if (S->getName().empty())
449 if (StringRef(S->getName()) == StringRef(Name))
452 return &*TopLevelSubCommand;
455 /// LookupNearestOption - Lookup the closest match to the option specified by
456 /// the specified option on the command line. If there is a value specified
457 /// (after an equal sign) return that as well. This assumes that leading dashes
458 /// have already been stripped.
459 static Option *LookupNearestOption(StringRef Arg,
460 const StringMap<Option *> &OptionsMap,
461 std::string &NearestString) {
462 // Reject all dashes.
466 // Split on any equal sign.
467 std::pair<StringRef, StringRef> SplitArg = Arg.split('=');
468 StringRef &LHS = SplitArg.first; // LHS == Arg when no '=' is present.
469 StringRef &RHS = SplitArg.second;
471 // Find the closest match.
472 Option *Best = nullptr;
473 unsigned BestDistance = 0;
474 for (StringMap<Option *>::const_iterator it = OptionsMap.begin(),
475 ie = OptionsMap.end();
477 Option *O = it->second;
478 SmallVector<StringRef, 16> OptionNames;
479 O->getExtraOptionNames(OptionNames);
481 OptionNames.push_back(O->ArgStr);
483 bool PermitValue = O->getValueExpectedFlag() != cl::ValueDisallowed;
484 StringRef Flag = PermitValue ? LHS : Arg;
485 for (auto Name : OptionNames) {
486 unsigned Distance = StringRef(Name).edit_distance(
487 Flag, /*AllowReplacements=*/true, /*MaxEditDistance=*/BestDistance);
488 if (!Best || Distance < BestDistance) {
490 BestDistance = Distance;
491 if (RHS.empty() || !PermitValue)
492 NearestString = Name;
494 NearestString = (Twine(Name) + "=" + RHS).str();
502 /// CommaSeparateAndAddOccurrence - A wrapper around Handler->addOccurrence()
503 /// that does special handling of cl::CommaSeparated options.
504 static bool CommaSeparateAndAddOccurrence(Option *Handler, unsigned pos,
505 StringRef ArgName, StringRef Value,
506 bool MultiArg = false) {
507 // Check to see if this option accepts a comma separated list of values. If
508 // it does, we have to split up the value into multiple values.
509 if (Handler->getMiscFlags() & CommaSeparated) {
510 StringRef Val(Value);
511 StringRef::size_type Pos = Val.find(',');
513 while (Pos != StringRef::npos) {
514 // Process the portion before the comma.
515 if (Handler->addOccurrence(pos, ArgName, Val.substr(0, Pos), MultiArg))
517 // Erase the portion before the comma, AND the comma.
518 Val = Val.substr(Pos + 1);
519 // Check for another comma.
526 return Handler->addOccurrence(pos, ArgName, Value, MultiArg);
529 /// ProvideOption - For Value, this differentiates between an empty value ("")
530 /// and a null value (StringRef()). The later is accepted for arguments that
531 /// don't allow a value (-foo) the former is rejected (-foo=).
532 static inline bool ProvideOption(Option *Handler, StringRef ArgName,
533 StringRef Value, int argc,
534 const char *const *argv, int &i) {
535 // Is this a multi-argument option?
536 unsigned NumAdditionalVals = Handler->getNumAdditionalVals();
538 // Enforce value requirements
539 switch (Handler->getValueExpectedFlag()) {
541 if (!Value.data()) { // No value specified?
543 return Handler->error("requires a value!");
544 // Steal the next argument, like for '-o filename'
545 assert(argv && "null check");
546 Value = StringRef(argv[++i]);
549 case ValueDisallowed:
550 if (NumAdditionalVals > 0)
551 return Handler->error("multi-valued option specified"
552 " with ValueDisallowed modifier!");
555 return Handler->error("does not allow a value! '" + Twine(Value) +
562 // If this isn't a multi-arg option, just run the handler.
563 if (NumAdditionalVals == 0)
564 return CommaSeparateAndAddOccurrence(Handler, i, ArgName, Value);
566 // If it is, run the handle several times.
567 bool MultiArg = false;
570 if (CommaSeparateAndAddOccurrence(Handler, i, ArgName, Value, MultiArg))
576 while (NumAdditionalVals > 0) {
578 return Handler->error("not enough values!");
579 assert(argv && "null check");
580 Value = StringRef(argv[++i]);
582 if (CommaSeparateAndAddOccurrence(Handler, i, ArgName, Value, MultiArg))
590 static bool ProvidePositionalOption(Option *Handler, StringRef Arg, int i) {
592 return ProvideOption(Handler, Handler->ArgStr, Arg, 0, nullptr, Dummy);
595 // Option predicates...
596 static inline bool isGrouping(const Option *O) {
597 return O->getFormattingFlag() == cl::Grouping;
599 static inline bool isPrefixedOrGrouping(const Option *O) {
600 return isGrouping(O) || O->getFormattingFlag() == cl::Prefix;
603 // getOptionPred - Check to see if there are any options that satisfy the
604 // specified predicate with names that are the prefixes in Name. This is
605 // checked by progressively stripping characters off of the name, checking to
606 // see if there options that satisfy the predicate. If we find one, return it,
607 // otherwise return null.
609 static Option *getOptionPred(StringRef Name, size_t &Length,
610 bool (*Pred)(const Option *),
611 const StringMap<Option *> &OptionsMap) {
613 StringMap<Option *>::const_iterator OMI = OptionsMap.find(Name);
615 // Loop while we haven't found an option and Name still has at least two
616 // characters in it (so that the next iteration will not be the empty
618 while (OMI == OptionsMap.end() && Name.size() > 1) {
619 Name = Name.substr(0, Name.size() - 1); // Chop off the last character.
620 OMI = OptionsMap.find(Name);
623 if (OMI != OptionsMap.end() && Pred(OMI->second)) {
624 Length = Name.size();
625 return OMI->second; // Found one!
627 return nullptr; // No option found!
630 /// HandlePrefixedOrGroupedOption - The specified argument string (which started
631 /// with at least one '-') does not fully match an available option. Check to
632 /// see if this is a prefix or grouped option. If so, split arg into output an
633 /// Arg/Value pair and return the Option to parse it with.
635 HandlePrefixedOrGroupedOption(StringRef &Arg, StringRef &Value,
637 const StringMap<Option *> &OptionsMap) {
643 Option *PGOpt = getOptionPred(Arg, Length, isPrefixedOrGrouping, OptionsMap);
647 // If the option is a prefixed option, then the value is simply the
648 // rest of the name... so fall through to later processing, by
649 // setting up the argument name flags and value fields.
650 if (PGOpt->getFormattingFlag() == cl::Prefix) {
651 Value = Arg.substr(Length);
652 Arg = Arg.substr(0, Length);
653 assert(OptionsMap.count(Arg) && OptionsMap.find(Arg)->second == PGOpt);
657 // This must be a grouped option... handle them now. Grouping options can't
659 assert(isGrouping(PGOpt) && "Broken getOptionPred!");
662 // Move current arg name out of Arg into OneArgName.
663 StringRef OneArgName = Arg.substr(0, Length);
664 Arg = Arg.substr(Length);
666 // Because ValueRequired is an invalid flag for grouped arguments,
667 // we don't need to pass argc/argv in.
668 assert(PGOpt->getValueExpectedFlag() != cl::ValueRequired &&
669 "Option can not be cl::Grouping AND cl::ValueRequired!");
672 ProvideOption(PGOpt, OneArgName, StringRef(), 0, nullptr, Dummy);
674 // Get the next grouping option.
675 PGOpt = getOptionPred(Arg, Length, isGrouping, OptionsMap);
676 } while (PGOpt && Length != Arg.size());
678 // Return the last option with Arg cut down to just the last one.
682 static bool RequiresValue(const Option *O) {
683 return O->getNumOccurrencesFlag() == cl::Required ||
684 O->getNumOccurrencesFlag() == cl::OneOrMore;
687 static bool EatsUnboundedNumberOfValues(const Option *O) {
688 return O->getNumOccurrencesFlag() == cl::ZeroOrMore ||
689 O->getNumOccurrencesFlag() == cl::OneOrMore;
692 static bool isWhitespace(char C) {
693 return C == ' ' || C == '\t' || C == '\r' || C == '\n';
696 static bool isQuote(char C) { return C == '\"' || C == '\''; }
698 void cl::TokenizeGNUCommandLine(StringRef Src, StringSaver &Saver,
699 SmallVectorImpl<const char *> &NewArgv,
701 SmallString<128> Token;
702 for (size_t I = 0, E = Src.size(); I != E; ++I) {
703 // Consume runs of whitespace.
705 while (I != E && isWhitespace(Src[I])) {
706 // Mark the end of lines in response files
707 if (MarkEOLs && Src[I] == '\n')
708 NewArgv.push_back(nullptr);
717 // Backslash escapes the next character.
718 if (I + 1 < E && C == '\\') {
719 ++I; // Skip the escape.
720 Token.push_back(Src[I]);
724 // Consume a quoted string.
727 while (I != E && Src[I] != C) {
728 // Backslash escapes the next character.
729 if (Src[I] == '\\' && I + 1 != E)
731 Token.push_back(Src[I]);
739 // End the token if this is whitespace.
740 if (isWhitespace(C)) {
742 NewArgv.push_back(Saver.save(StringRef(Token)).data());
747 // This is a normal character. Append it.
751 // Append the last token after hitting EOF with no whitespace.
753 NewArgv.push_back(Saver.save(StringRef(Token)).data());
754 // Mark the end of response files
756 NewArgv.push_back(nullptr);
759 /// Backslashes are interpreted in a rather complicated way in the Windows-style
760 /// command line, because backslashes are used both to separate path and to
761 /// escape double quote. This method consumes runs of backslashes as well as the
762 /// following double quote if it's escaped.
764 /// * If an even number of backslashes is followed by a double quote, one
765 /// backslash is output for every pair of backslashes, and the last double
766 /// quote remains unconsumed. The double quote will later be interpreted as
767 /// the start or end of a quoted string in the main loop outside of this
770 /// * If an odd number of backslashes is followed by a double quote, one
771 /// backslash is output for every pair of backslashes, and a double quote is
772 /// output for the last pair of backslash-double quote. The double quote is
773 /// consumed in this case.
775 /// * Otherwise, backslashes are interpreted literally.
776 static size_t parseBackslash(StringRef Src, size_t I, SmallString<128> &Token) {
777 size_t E = Src.size();
778 int BackslashCount = 0;
779 // Skip the backslashes.
783 } while (I != E && Src[I] == '\\');
785 bool FollowedByDoubleQuote = (I != E && Src[I] == '"');
786 if (FollowedByDoubleQuote) {
787 Token.append(BackslashCount / 2, '\\');
788 if (BackslashCount % 2 == 0)
790 Token.push_back('"');
793 Token.append(BackslashCount, '\\');
797 void cl::TokenizeWindowsCommandLine(StringRef Src, StringSaver &Saver,
798 SmallVectorImpl<const char *> &NewArgv,
800 SmallString<128> Token;
802 // This is a small state machine to consume characters until it reaches the
803 // end of the source string.
804 enum { INIT, UNQUOTED, QUOTED } State = INIT;
805 for (size_t I = 0, E = Src.size(); I != E; ++I) {
808 // INIT state indicates that the current input index is at the start of
809 // the string or between tokens.
811 if (isWhitespace(C)) {
812 // Mark the end of lines in response files
813 if (MarkEOLs && C == '\n')
814 NewArgv.push_back(nullptr);
822 I = parseBackslash(Src, I, Token);
831 // UNQUOTED state means that it's reading a token not quoted by double
833 if (State == UNQUOTED) {
834 // Whitespace means the end of the token.
835 if (isWhitespace(C)) {
836 NewArgv.push_back(Saver.save(StringRef(Token)).data());
839 // Mark the end of lines in response files
840 if (MarkEOLs && C == '\n')
841 NewArgv.push_back(nullptr);
849 I = parseBackslash(Src, I, Token);
856 // QUOTED state means that it's reading a token quoted by double quotes.
857 if (State == QUOTED) {
863 I = parseBackslash(Src, I, Token);
869 // Append the last token after hitting EOF with no whitespace.
871 NewArgv.push_back(Saver.save(StringRef(Token)).data());
872 // Mark the end of response files
874 NewArgv.push_back(nullptr);
877 void cl::tokenizeConfigFile(StringRef Source, StringSaver &Saver,
878 SmallVectorImpl<const char *> &NewArgv,
880 for (const char *Cur = Source.begin(); Cur != Source.end();) {
881 SmallString<128> Line;
882 // Check for comment line.
883 if (isWhitespace(*Cur)) {
884 while (Cur != Source.end() && isWhitespace(*Cur))
889 while (Cur != Source.end() && *Cur != '\n')
893 // Find end of the current line.
894 const char *Start = Cur;
895 for (const char *End = Source.end(); Cur != End; ++Cur) {
897 if (Cur + 1 != End) {
900 (*Cur == '\r' && (Cur + 1 != End) && Cur[1] == '\n')) {
901 Line.append(Start, Cur - 1);
907 } else if (*Cur == '\n')
911 Line.append(Start, Cur);
912 cl::TokenizeGNUCommandLine(Line, Saver, NewArgv, MarkEOLs);
916 // It is called byte order marker but the UTF-8 BOM is actually not affected
917 // by the host system's endianness.
918 static bool hasUTF8ByteOrderMark(ArrayRef<char> S) {
919 return (S.size() >= 3 && S[0] == '\xef' && S[1] == '\xbb' && S[2] == '\xbf');
922 static bool ExpandResponseFile(StringRef FName, StringSaver &Saver,
923 TokenizerCallback Tokenizer,
924 SmallVectorImpl<const char *> &NewArgv,
925 bool MarkEOLs, bool RelativeNames) {
926 ErrorOr<std::unique_ptr<MemoryBuffer>> MemBufOrErr =
927 MemoryBuffer::getFile(FName);
930 MemoryBuffer &MemBuf = *MemBufOrErr.get();
931 StringRef Str(MemBuf.getBufferStart(), MemBuf.getBufferSize());
933 // If we have a UTF-16 byte order mark, convert to UTF-8 for parsing.
934 ArrayRef<char> BufRef(MemBuf.getBufferStart(), MemBuf.getBufferEnd());
936 if (hasUTF16ByteOrderMark(BufRef)) {
937 if (!convertUTF16ToUTF8String(BufRef, UTF8Buf))
939 Str = StringRef(UTF8Buf);
941 // If we see UTF-8 BOM sequence at the beginning of a file, we shall remove
942 // these bytes before parsing.
943 // Reference: http://en.wikipedia.org/wiki/UTF-8#Byte_order_mark
944 else if (hasUTF8ByteOrderMark(BufRef))
945 Str = StringRef(BufRef.data() + 3, BufRef.size() - 3);
947 // Tokenize the contents into NewArgv.
948 Tokenizer(Str, Saver, NewArgv, MarkEOLs);
950 // If names of nested response files should be resolved relative to including
951 // file, replace the included response file names with their full paths
952 // obtained by required resolution.
954 for (unsigned I = 0; I < NewArgv.size(); ++I)
956 StringRef Arg = NewArgv[I];
957 if (Arg.front() == '@') {
958 StringRef FileName = Arg.drop_front();
959 if (llvm::sys::path::is_relative(FileName)) {
960 SmallString<128> ResponseFile;
961 ResponseFile.append(1, '@');
962 if (llvm::sys::path::is_relative(FName)) {
963 SmallString<128> curr_dir;
964 llvm::sys::fs::current_path(curr_dir);
965 ResponseFile.append(curr_dir.str());
967 llvm::sys::path::append(
968 ResponseFile, llvm::sys::path::parent_path(FName), FileName);
969 NewArgv[I] = Saver.save(ResponseFile.c_str()).data();
977 /// Expand response files on a command line recursively using the given
978 /// StringSaver and tokenization strategy.
979 bool cl::ExpandResponseFiles(StringSaver &Saver, TokenizerCallback Tokenizer,
980 SmallVectorImpl<const char *> &Argv,
981 bool MarkEOLs, bool RelativeNames) {
982 unsigned RspFiles = 0;
983 bool AllExpanded = true;
985 // Don't cache Argv.size() because it can change.
986 for (unsigned I = 0; I != Argv.size();) {
987 const char *Arg = Argv[I];
988 // Check if it is an EOL marker
989 if (Arg == nullptr) {
998 // If we have too many response files, leave some unexpanded. This avoids
999 // crashing on self-referential response files.
1000 if (RspFiles++ > 20)
1003 // Replace this response file argument with the tokenization of its
1004 // contents. Nested response files are expanded in subsequent iterations.
1005 SmallVector<const char *, 0> ExpandedArgv;
1006 if (!ExpandResponseFile(Arg + 1, Saver, Tokenizer, ExpandedArgv,
1007 MarkEOLs, RelativeNames)) {
1008 // We couldn't read this file, so we leave it in the argument stream and
1010 AllExpanded = false;
1014 Argv.erase(Argv.begin() + I);
1015 Argv.insert(Argv.begin() + I, ExpandedArgv.begin(), ExpandedArgv.end());
1020 bool cl::readConfigFile(StringRef CfgFile, StringSaver &Saver,
1021 SmallVectorImpl<const char *> &Argv) {
1022 if (!ExpandResponseFile(CfgFile, Saver, cl::tokenizeConfigFile, Argv,
1023 /*MarkEOLs*/ false, /*RelativeNames*/ true))
1025 return ExpandResponseFiles(Saver, cl::tokenizeConfigFile, Argv,
1026 /*MarkEOLs*/ false, /*RelativeNames*/ true);
1029 /// ParseEnvironmentOptions - An alternative entry point to the
1030 /// CommandLine library, which allows you to read the program's name
1031 /// from the caller (as PROGNAME) and its command-line arguments from
1032 /// an environment variable (whose name is given in ENVVAR).
1034 void cl::ParseEnvironmentOptions(const char *progName, const char *envVar,
1035 const char *Overview) {
1037 assert(progName && "Program name not specified");
1038 assert(envVar && "Environment variable name missing");
1040 // Get the environment variable they want us to parse options out of.
1041 llvm::Optional<std::string> envValue = sys::Process::GetEnv(StringRef(envVar));
1045 // Get program's "name", which we wouldn't know without the caller
1047 SmallVector<const char *, 20> newArgv;
1049 StringSaver Saver(A);
1050 newArgv.push_back(Saver.save(progName).data());
1052 // Parse the value of the environment variable into a "command line"
1053 // and hand it off to ParseCommandLineOptions().
1054 TokenizeGNUCommandLine(*envValue, Saver, newArgv);
1055 int newArgc = static_cast<int>(newArgv.size());
1056 ParseCommandLineOptions(newArgc, &newArgv[0], StringRef(Overview));
1059 bool cl::ParseCommandLineOptions(int argc, const char *const *argv,
1060 StringRef Overview, raw_ostream *Errs) {
1061 return GlobalParser->ParseCommandLineOptions(argc, argv, Overview,
1065 void CommandLineParser::ResetAllOptionOccurrences() {
1066 // So that we can parse different command lines multiple times in succession
1067 // we reset all option values to look like they have never been seen before.
1068 for (auto SC : RegisteredSubCommands) {
1069 for (auto &O : SC->OptionsMap)
1074 bool CommandLineParser::ParseCommandLineOptions(int argc,
1075 const char *const *argv,
1077 raw_ostream *Errs) {
1078 assert(hasOptions() && "No options specified!");
1080 // Expand response files.
1081 SmallVector<const char *, 20> newArgv(argv, argv + argc);
1083 StringSaver Saver(A);
1084 ExpandResponseFiles(Saver,
1085 Triple(sys::getProcessTriple()).isOSWindows() ?
1086 cl::TokenizeWindowsCommandLine : cl::TokenizeGNUCommandLine,
1089 argc = static_cast<int>(newArgv.size());
1091 // Copy the program name into ProgName, making sure not to overflow it.
1092 ProgramName = sys::path::filename(StringRef(argv[0]));
1094 ProgramOverview = Overview;
1095 bool IgnoreErrors = Errs;
1098 bool ErrorParsing = false;
1100 // Check out the positional arguments to collect information about them.
1101 unsigned NumPositionalRequired = 0;
1103 // Determine whether or not there are an unlimited number of positionals
1104 bool HasUnlimitedPositionals = false;
1107 SubCommand *ChosenSubCommand = &*TopLevelSubCommand;
1108 if (argc >= 2 && argv[FirstArg][0] != '-') {
1109 // If the first argument specifies a valid subcommand, start processing
1110 // options from the second argument.
1111 ChosenSubCommand = LookupSubCommand(StringRef(argv[FirstArg]));
1112 if (ChosenSubCommand != &*TopLevelSubCommand)
1115 GlobalParser->ActiveSubCommand = ChosenSubCommand;
1117 assert(ChosenSubCommand);
1118 auto &ConsumeAfterOpt = ChosenSubCommand->ConsumeAfterOpt;
1119 auto &PositionalOpts = ChosenSubCommand->PositionalOpts;
1120 auto &SinkOpts = ChosenSubCommand->SinkOpts;
1121 auto &OptionsMap = ChosenSubCommand->OptionsMap;
1123 if (ConsumeAfterOpt) {
1124 assert(PositionalOpts.size() > 0 &&
1125 "Cannot specify cl::ConsumeAfter without a positional argument!");
1127 if (!PositionalOpts.empty()) {
1129 // Calculate how many positional values are _required_.
1130 bool UnboundedFound = false;
1131 for (size_t i = 0, e = PositionalOpts.size(); i != e; ++i) {
1132 Option *Opt = PositionalOpts[i];
1133 if (RequiresValue(Opt))
1134 ++NumPositionalRequired;
1135 else if (ConsumeAfterOpt) {
1136 // ConsumeAfter cannot be combined with "optional" positional options
1137 // unless there is only one positional argument...
1138 if (PositionalOpts.size() > 1) {
1140 Opt->error("error - this positional option will never be matched, "
1141 "because it does not Require a value, and a "
1142 "cl::ConsumeAfter option is active!");
1143 ErrorParsing = true;
1145 } else if (UnboundedFound && !Opt->hasArgStr()) {
1146 // This option does not "require" a value... Make sure this option is
1147 // not specified after an option that eats all extra arguments, or this
1148 // one will never get any!
1151 Opt->error("error - option can never match, because "
1152 "another positional argument will match an "
1153 "unbounded number of values, and this option"
1154 " does not require a value!");
1155 *Errs << ProgramName << ": CommandLine Error: Option '" << Opt->ArgStr
1156 << "' is all messed up!\n";
1157 *Errs << PositionalOpts.size();
1158 ErrorParsing = true;
1160 UnboundedFound |= EatsUnboundedNumberOfValues(Opt);
1162 HasUnlimitedPositionals = UnboundedFound || ConsumeAfterOpt;
1165 // PositionalVals - A vector of "positional" arguments we accumulate into
1166 // the process at the end.
1168 SmallVector<std::pair<StringRef, unsigned>, 4> PositionalVals;
1170 // If the program has named positional arguments, and the name has been run
1171 // across, keep track of which positional argument was named. Otherwise put
1172 // the positional args into the PositionalVals list...
1173 Option *ActivePositionalArg = nullptr;
1175 // Loop over all of the arguments... processing them.
1176 bool DashDashFound = false; // Have we read '--'?
1177 for (int i = FirstArg; i < argc; ++i) {
1178 Option *Handler = nullptr;
1179 Option *NearestHandler = nullptr;
1180 std::string NearestHandlerString;
1182 StringRef ArgName = "";
1184 // Check to see if this is a positional argument. This argument is
1185 // considered to be positional if it doesn't start with '-', if it is "-"
1186 // itself, or if we have seen "--" already.
1188 if (argv[i][0] != '-' || argv[i][1] == 0 || DashDashFound) {
1189 // Positional argument!
1190 if (ActivePositionalArg) {
1191 ProvidePositionalOption(ActivePositionalArg, StringRef(argv[i]), i);
1192 continue; // We are done!
1195 if (!PositionalOpts.empty()) {
1196 PositionalVals.push_back(std::make_pair(StringRef(argv[i]), i));
1198 // All of the positional arguments have been fulfulled, give the rest to
1199 // the consume after option... if it's specified...
1201 if (PositionalVals.size() >= NumPositionalRequired && ConsumeAfterOpt) {
1202 for (++i; i < argc; ++i)
1203 PositionalVals.push_back(std::make_pair(StringRef(argv[i]), i));
1204 break; // Handle outside of the argument processing loop...
1207 // Delay processing positional arguments until the end...
1210 } else if (argv[i][0] == '-' && argv[i][1] == '-' && argv[i][2] == 0 &&
1212 DashDashFound = true; // This is the mythical "--"?
1213 continue; // Don't try to process it as an argument itself.
1214 } else if (ActivePositionalArg &&
1215 (ActivePositionalArg->getMiscFlags() & PositionalEatsArgs)) {
1216 // If there is a positional argument eating options, check to see if this
1217 // option is another positional argument. If so, treat it as an argument,
1218 // otherwise feed it to the eating positional.
1219 ArgName = StringRef(argv[i] + 1);
1220 // Eat leading dashes.
1221 while (!ArgName.empty() && ArgName[0] == '-')
1222 ArgName = ArgName.substr(1);
1224 Handler = LookupOption(*ChosenSubCommand, ArgName, Value);
1225 if (!Handler || Handler->getFormattingFlag() != cl::Positional) {
1226 ProvidePositionalOption(ActivePositionalArg, StringRef(argv[i]), i);
1227 continue; // We are done!
1230 } else { // We start with a '-', must be an argument.
1231 ArgName = StringRef(argv[i] + 1);
1232 // Eat leading dashes.
1233 while (!ArgName.empty() && ArgName[0] == '-')
1234 ArgName = ArgName.substr(1);
1236 Handler = LookupOption(*ChosenSubCommand, ArgName, Value);
1238 // Check to see if this "option" is really a prefixed or grouped argument.
1240 Handler = HandlePrefixedOrGroupedOption(ArgName, Value, ErrorParsing,
1243 // Otherwise, look for the closest available option to report to the user
1244 // in the upcoming error.
1245 if (!Handler && SinkOpts.empty())
1247 LookupNearestOption(ArgName, OptionsMap, NearestHandlerString);
1251 if (SinkOpts.empty()) {
1252 *Errs << ProgramName << ": Unknown command line argument '" << argv[i]
1253 << "'. Try: '" << argv[0] << " -help'\n";
1255 if (NearestHandler) {
1256 // If we know a near match, report it as well.
1257 *Errs << ProgramName << ": Did you mean '-" << NearestHandlerString
1261 ErrorParsing = true;
1263 for (SmallVectorImpl<Option *>::iterator I = SinkOpts.begin(),
1266 (*I)->addOccurrence(i, "", StringRef(argv[i]));
1271 // If this is a named positional argument, just remember that it is the
1273 if (Handler->getFormattingFlag() == cl::Positional) {
1274 if ((Handler->getMiscFlags() & PositionalEatsArgs) && !Value.empty()) {
1275 Handler->error("This argument does not take a value.\n"
1276 "\tInstead, it consumes any positional arguments until "
1277 "the next recognized option.", *Errs);
1278 ErrorParsing = true;
1280 ActivePositionalArg = Handler;
1283 ErrorParsing |= ProvideOption(Handler, ArgName, Value, argc, argv, i);
1286 // Check and handle positional arguments now...
1287 if (NumPositionalRequired > PositionalVals.size()) {
1288 *Errs << ProgramName
1289 << ": Not enough positional command line arguments specified!\n"
1290 << "Must specify at least " << NumPositionalRequired
1291 << " positional argument" << (NumPositionalRequired > 1 ? "s" : "")
1292 << ": See: " << argv[0] << " -help\n";
1294 ErrorParsing = true;
1295 } else if (!HasUnlimitedPositionals &&
1296 PositionalVals.size() > PositionalOpts.size()) {
1297 *Errs << ProgramName << ": Too many positional arguments specified!\n"
1298 << "Can specify at most " << PositionalOpts.size()
1299 << " positional arguments: See: " << argv[0] << " -help\n";
1300 ErrorParsing = true;
1302 } else if (!ConsumeAfterOpt) {
1303 // Positional args have already been handled if ConsumeAfter is specified.
1304 unsigned ValNo = 0, NumVals = static_cast<unsigned>(PositionalVals.size());
1305 for (size_t i = 0, e = PositionalOpts.size(); i != e; ++i) {
1306 if (RequiresValue(PositionalOpts[i])) {
1307 ProvidePositionalOption(PositionalOpts[i], PositionalVals[ValNo].first,
1308 PositionalVals[ValNo].second);
1310 --NumPositionalRequired; // We fulfilled our duty...
1313 // If we _can_ give this option more arguments, do so now, as long as we
1314 // do not give it values that others need. 'Done' controls whether the
1315 // option even _WANTS_ any more.
1317 bool Done = PositionalOpts[i]->getNumOccurrencesFlag() == cl::Required;
1318 while (NumVals - ValNo > NumPositionalRequired && !Done) {
1319 switch (PositionalOpts[i]->getNumOccurrencesFlag()) {
1321 Done = true; // Optional arguments want _at most_ one value
1323 case cl::ZeroOrMore: // Zero or more will take all they can get...
1324 case cl::OneOrMore: // One or more will take all they can get...
1325 ProvidePositionalOption(PositionalOpts[i],
1326 PositionalVals[ValNo].first,
1327 PositionalVals[ValNo].second);
1331 llvm_unreachable("Internal error, unexpected NumOccurrences flag in "
1332 "positional argument processing!");
1337 assert(ConsumeAfterOpt && NumPositionalRequired <= PositionalVals.size());
1339 for (size_t j = 1, e = PositionalOpts.size(); j != e; ++j)
1340 if (RequiresValue(PositionalOpts[j])) {
1341 ErrorParsing |= ProvidePositionalOption(PositionalOpts[j],
1342 PositionalVals[ValNo].first,
1343 PositionalVals[ValNo].second);
1347 // Handle the case where there is just one positional option, and it's
1348 // optional. In this case, we want to give JUST THE FIRST option to the
1349 // positional option and keep the rest for the consume after. The above
1350 // loop would have assigned no values to positional options in this case.
1352 if (PositionalOpts.size() == 1 && ValNo == 0 && !PositionalVals.empty()) {
1353 ErrorParsing |= ProvidePositionalOption(PositionalOpts[0],
1354 PositionalVals[ValNo].first,
1355 PositionalVals[ValNo].second);
1359 // Handle over all of the rest of the arguments to the
1360 // cl::ConsumeAfter command line option...
1361 for (; ValNo != PositionalVals.size(); ++ValNo)
1363 ProvidePositionalOption(ConsumeAfterOpt, PositionalVals[ValNo].first,
1364 PositionalVals[ValNo].second);
1367 // Loop over args and make sure all required args are specified!
1368 for (const auto &Opt : OptionsMap) {
1369 switch (Opt.second->getNumOccurrencesFlag()) {
1372 if (Opt.second->getNumOccurrences() == 0) {
1373 Opt.second->error("must be specified at least once!");
1374 ErrorParsing = true;
1382 // Now that we know if -debug is specified, we can use it.
1383 // Note that if ReadResponseFiles == true, this must be done before the
1384 // memory allocated for the expanded command line is free()d below.
1385 LLVM_DEBUG(dbgs() << "Args: ";
1386 for (int i = 0; i < argc; ++i) dbgs() << argv[i] << ' ';
1389 // Free all of the memory allocated to the map. Command line options may only
1390 // be processed once!
1393 // If we had an error processing our arguments, don't let the program execute
1402 //===----------------------------------------------------------------------===//
1403 // Option Base class implementation
1406 bool Option::error(const Twine &Message, StringRef ArgName, raw_ostream &Errs) {
1407 if (!ArgName.data())
1409 if (ArgName.empty())
1410 Errs << HelpStr; // Be nice for positional arguments
1412 Errs << GlobalParser->ProgramName << ": for the -" << ArgName;
1414 Errs << " option: " << Message << "\n";
1418 bool Option::addOccurrence(unsigned pos, StringRef ArgName, StringRef Value,
1421 NumOccurrences++; // Increment the number of times we have been seen
1423 switch (getNumOccurrencesFlag()) {
1425 if (NumOccurrences > 1)
1426 return error("may only occur zero or one times!", ArgName);
1429 if (NumOccurrences > 1)
1430 return error("must occur exactly one time!", ArgName);
1438 return handleOccurrence(pos, ArgName, Value);
1441 // getValueStr - Get the value description string, using "DefaultMsg" if nothing
1442 // has been specified yet.
1444 static StringRef getValueStr(const Option &O, StringRef DefaultMsg) {
1445 if (O.ValueStr.empty())
1450 //===----------------------------------------------------------------------===//
1451 // cl::alias class implementation
1454 // Return the width of the option tag for printing...
1455 size_t alias::getOptionWidth() const { return ArgStr.size() + 6; }
1457 void Option::printHelpStr(StringRef HelpStr, size_t Indent,
1458 size_t FirstLineIndentedBy) {
1459 std::pair<StringRef, StringRef> Split = HelpStr.split('\n');
1460 outs().indent(Indent - FirstLineIndentedBy) << " - " << Split.first << "\n";
1461 while (!Split.second.empty()) {
1462 Split = Split.second.split('\n');
1463 outs().indent(Indent) << Split.first << "\n";
1467 // Print out the option for the alias.
1468 void alias::printOptionInfo(size_t GlobalWidth) const {
1469 outs() << " -" << ArgStr;
1470 printHelpStr(HelpStr, GlobalWidth, ArgStr.size() + 6);
1473 //===----------------------------------------------------------------------===//
1474 // Parser Implementation code...
1477 // basic_parser implementation
1480 // Return the width of the option tag for printing...
1481 size_t basic_parser_impl::getOptionWidth(const Option &O) const {
1482 size_t Len = O.ArgStr.size();
1483 auto ValName = getValueName();
1484 if (!ValName.empty()) {
1485 size_t FormattingLen = 3;
1486 if (O.getMiscFlags() & PositionalEatsArgs)
1488 Len += getValueStr(O, ValName).size() + FormattingLen;
1494 // printOptionInfo - Print out information about this option. The
1495 // to-be-maintained width is specified.
1497 void basic_parser_impl::printOptionInfo(const Option &O,
1498 size_t GlobalWidth) const {
1499 outs() << " -" << O.ArgStr;
1501 auto ValName = getValueName();
1502 if (!ValName.empty()) {
1503 if (O.getMiscFlags() & PositionalEatsArgs) {
1504 outs() << " <" << getValueStr(O, ValName) << ">...";
1506 outs() << "=<" << getValueStr(O, ValName) << '>';
1510 Option::printHelpStr(O.HelpStr, GlobalWidth, getOptionWidth(O));
1513 void basic_parser_impl::printOptionName(const Option &O,
1514 size_t GlobalWidth) const {
1515 outs() << " -" << O.ArgStr;
1516 outs().indent(GlobalWidth - O.ArgStr.size());
1519 // parser<bool> implementation
1521 bool parser<bool>::parse(Option &O, StringRef ArgName, StringRef Arg,
1523 if (Arg == "" || Arg == "true" || Arg == "TRUE" || Arg == "True" ||
1529 if (Arg == "false" || Arg == "FALSE" || Arg == "False" || Arg == "0") {
1533 return O.error("'" + Arg +
1534 "' is invalid value for boolean argument! Try 0 or 1");
1537 // parser<boolOrDefault> implementation
1539 bool parser<boolOrDefault>::parse(Option &O, StringRef ArgName, StringRef Arg,
1540 boolOrDefault &Value) {
1541 if (Arg == "" || Arg == "true" || Arg == "TRUE" || Arg == "True" ||
1546 if (Arg == "false" || Arg == "FALSE" || Arg == "False" || Arg == "0") {
1551 return O.error("'" + Arg +
1552 "' is invalid value for boolean argument! Try 0 or 1");
1555 // parser<int> implementation
1557 bool parser<int>::parse(Option &O, StringRef ArgName, StringRef Arg,
1559 if (Arg.getAsInteger(0, Value))
1560 return O.error("'" + Arg + "' value invalid for integer argument!");
1564 // parser<unsigned> implementation
1566 bool parser<unsigned>::parse(Option &O, StringRef ArgName, StringRef Arg,
1569 if (Arg.getAsInteger(0, Value))
1570 return O.error("'" + Arg + "' value invalid for uint argument!");
1574 // parser<unsigned long long> implementation
1576 bool parser<unsigned long long>::parse(Option &O, StringRef ArgName,
1578 unsigned long long &Value) {
1580 if (Arg.getAsInteger(0, Value))
1581 return O.error("'" + Arg + "' value invalid for uint argument!");
1585 // parser<double>/parser<float> implementation
1587 static bool parseDouble(Option &O, StringRef Arg, double &Value) {
1588 if (to_float(Arg, Value))
1590 return O.error("'" + Arg + "' value invalid for floating point argument!");
1593 bool parser<double>::parse(Option &O, StringRef ArgName, StringRef Arg,
1595 return parseDouble(O, Arg, Val);
1598 bool parser<float>::parse(Option &O, StringRef ArgName, StringRef Arg,
1601 if (parseDouble(O, Arg, dVal))
1607 // generic_parser_base implementation
1610 // findOption - Return the option number corresponding to the specified
1611 // argument string. If the option is not found, getNumOptions() is returned.
1613 unsigned generic_parser_base::findOption(StringRef Name) {
1614 unsigned e = getNumOptions();
1616 for (unsigned i = 0; i != e; ++i) {
1617 if (getOption(i) == Name)
1623 // Return the width of the option tag for printing...
1624 size_t generic_parser_base::getOptionWidth(const Option &O) const {
1625 if (O.hasArgStr()) {
1626 size_t Size = O.ArgStr.size() + 6;
1627 for (unsigned i = 0, e = getNumOptions(); i != e; ++i)
1628 Size = std::max(Size, getOption(i).size() + 8);
1631 size_t BaseSize = 0;
1632 for (unsigned i = 0, e = getNumOptions(); i != e; ++i)
1633 BaseSize = std::max(BaseSize, getOption(i).size() + 8);
1638 // printOptionInfo - Print out information about this option. The
1639 // to-be-maintained width is specified.
1641 void generic_parser_base::printOptionInfo(const Option &O,
1642 size_t GlobalWidth) const {
1643 if (O.hasArgStr()) {
1644 outs() << " -" << O.ArgStr;
1645 Option::printHelpStr(O.HelpStr, GlobalWidth, O.ArgStr.size() + 6);
1647 for (unsigned i = 0, e = getNumOptions(); i != e; ++i) {
1648 size_t NumSpaces = GlobalWidth - getOption(i).size() - 8;
1649 outs() << " =" << getOption(i);
1650 outs().indent(NumSpaces) << " - " << getDescription(i) << '\n';
1653 if (!O.HelpStr.empty())
1654 outs() << " " << O.HelpStr << '\n';
1655 for (unsigned i = 0, e = getNumOptions(); i != e; ++i) {
1656 auto Option = getOption(i);
1657 outs() << " -" << Option;
1658 Option::printHelpStr(getDescription(i), GlobalWidth, Option.size() + 8);
1663 static const size_t MaxOptWidth = 8; // arbitrary spacing for printOptionDiff
1665 // printGenericOptionDiff - Print the value of this option and it's default.
1667 // "Generic" options have each value mapped to a name.
1668 void generic_parser_base::printGenericOptionDiff(
1669 const Option &O, const GenericOptionValue &Value,
1670 const GenericOptionValue &Default, size_t GlobalWidth) const {
1671 outs() << " -" << O.ArgStr;
1672 outs().indent(GlobalWidth - O.ArgStr.size());
1674 unsigned NumOpts = getNumOptions();
1675 for (unsigned i = 0; i != NumOpts; ++i) {
1676 if (Value.compare(getOptionValue(i)))
1679 outs() << "= " << getOption(i);
1680 size_t L = getOption(i).size();
1681 size_t NumSpaces = MaxOptWidth > L ? MaxOptWidth - L : 0;
1682 outs().indent(NumSpaces) << " (default: ";
1683 for (unsigned j = 0; j != NumOpts; ++j) {
1684 if (Default.compare(getOptionValue(j)))
1686 outs() << getOption(j);
1692 outs() << "= *unknown option value*\n";
1695 // printOptionDiff - Specializations for printing basic value types.
1697 #define PRINT_OPT_DIFF(T) \
1698 void parser<T>::printOptionDiff(const Option &O, T V, OptionValue<T> D, \
1699 size_t GlobalWidth) const { \
1700 printOptionName(O, GlobalWidth); \
1703 raw_string_ostream SS(Str); \
1706 outs() << "= " << Str; \
1707 size_t NumSpaces = \
1708 MaxOptWidth > Str.size() ? MaxOptWidth - Str.size() : 0; \
1709 outs().indent(NumSpaces) << " (default: "; \
1711 outs() << D.getValue(); \
1713 outs() << "*no default*"; \
1717 PRINT_OPT_DIFF(bool)
1718 PRINT_OPT_DIFF(boolOrDefault)
1720 PRINT_OPT_DIFF(unsigned)
1721 PRINT_OPT_DIFF(unsigned long long)
1722 PRINT_OPT_DIFF(double)
1723 PRINT_OPT_DIFF(float)
1724 PRINT_OPT_DIFF(char)
1726 void parser<std::string>::printOptionDiff(const Option &O, StringRef V,
1727 const OptionValue<std::string> &D,
1728 size_t GlobalWidth) const {
1729 printOptionName(O, GlobalWidth);
1730 outs() << "= " << V;
1731 size_t NumSpaces = MaxOptWidth > V.size() ? MaxOptWidth - V.size() : 0;
1732 outs().indent(NumSpaces) << " (default: ";
1734 outs() << D.getValue();
1736 outs() << "*no default*";
1740 // Print a placeholder for options that don't yet support printOptionDiff().
1741 void basic_parser_impl::printOptionNoValue(const Option &O,
1742 size_t GlobalWidth) const {
1743 printOptionName(O, GlobalWidth);
1744 outs() << "= *cannot print option value*\n";
1747 //===----------------------------------------------------------------------===//
1748 // -help and -help-hidden option implementation
1751 static int OptNameCompare(const std::pair<const char *, Option *> *LHS,
1752 const std::pair<const char *, Option *> *RHS) {
1753 return strcmp(LHS->first, RHS->first);
1756 static int SubNameCompare(const std::pair<const char *, SubCommand *> *LHS,
1757 const std::pair<const char *, SubCommand *> *RHS) {
1758 return strcmp(LHS->first, RHS->first);
1761 // Copy Options into a vector so we can sort them as we like.
1762 static void sortOpts(StringMap<Option *> &OptMap,
1763 SmallVectorImpl<std::pair<const char *, Option *>> &Opts,
1765 SmallPtrSet<Option *, 32> OptionSet; // Duplicate option detection.
1767 for (StringMap<Option *>::iterator I = OptMap.begin(), E = OptMap.end();
1769 // Ignore really-hidden options.
1770 if (I->second->getOptionHiddenFlag() == ReallyHidden)
1773 // Unless showhidden is set, ignore hidden flags.
1774 if (I->second->getOptionHiddenFlag() == Hidden && !ShowHidden)
1777 // If we've already seen this option, don't add it to the list again.
1778 if (!OptionSet.insert(I->second).second)
1782 std::pair<const char *, Option *>(I->getKey().data(), I->second));
1785 // Sort the options list alphabetically.
1786 array_pod_sort(Opts.begin(), Opts.end(), OptNameCompare);
1790 sortSubCommands(const SmallPtrSetImpl<SubCommand *> &SubMap,
1791 SmallVectorImpl<std::pair<const char *, SubCommand *>> &Subs) {
1792 for (const auto &S : SubMap) {
1793 if (S->getName().empty())
1795 Subs.push_back(std::make_pair(S->getName().data(), S));
1797 array_pod_sort(Subs.begin(), Subs.end(), SubNameCompare);
1804 const bool ShowHidden;
1805 typedef SmallVector<std::pair<const char *, Option *>, 128>
1806 StrOptionPairVector;
1807 typedef SmallVector<std::pair<const char *, SubCommand *>, 128>
1808 StrSubCommandPairVector;
1809 // Print the options. Opts is assumed to be alphabetically sorted.
1810 virtual void printOptions(StrOptionPairVector &Opts, size_t MaxArgLen) {
1811 for (size_t i = 0, e = Opts.size(); i != e; ++i)
1812 Opts[i].second->printOptionInfo(MaxArgLen);
1815 void printSubCommands(StrSubCommandPairVector &Subs, size_t MaxSubLen) {
1816 for (const auto &S : Subs) {
1817 outs() << " " << S.first;
1818 if (!S.second->getDescription().empty()) {
1819 outs().indent(MaxSubLen - strlen(S.first));
1820 outs() << " - " << S.second->getDescription();
1827 explicit HelpPrinter(bool showHidden) : ShowHidden(showHidden) {}
1828 virtual ~HelpPrinter() {}
1830 // Invoke the printer.
1831 void operator=(bool Value) {
1836 // Halt the program since help information was printed
1841 SubCommand *Sub = GlobalParser->getActiveSubCommand();
1842 auto &OptionsMap = Sub->OptionsMap;
1843 auto &PositionalOpts = Sub->PositionalOpts;
1844 auto &ConsumeAfterOpt = Sub->ConsumeAfterOpt;
1846 StrOptionPairVector Opts;
1847 sortOpts(OptionsMap, Opts, ShowHidden);
1849 StrSubCommandPairVector Subs;
1850 sortSubCommands(GlobalParser->RegisteredSubCommands, Subs);
1852 if (!GlobalParser->ProgramOverview.empty())
1853 outs() << "OVERVIEW: " << GlobalParser->ProgramOverview << "\n";
1855 if (Sub == &*TopLevelSubCommand) {
1856 outs() << "USAGE: " << GlobalParser->ProgramName;
1857 if (Subs.size() > 2)
1858 outs() << " [subcommand]";
1859 outs() << " [options]";
1861 if (!Sub->getDescription().empty()) {
1862 outs() << "SUBCOMMAND '" << Sub->getName()
1863 << "': " << Sub->getDescription() << "\n\n";
1865 outs() << "USAGE: " << GlobalParser->ProgramName << " " << Sub->getName()
1869 for (auto Opt : PositionalOpts) {
1870 if (Opt->hasArgStr())
1871 outs() << " --" << Opt->ArgStr;
1872 outs() << " " << Opt->HelpStr;
1875 // Print the consume after option info if it exists...
1876 if (ConsumeAfterOpt)
1877 outs() << " " << ConsumeAfterOpt->HelpStr;
1879 if (Sub == &*TopLevelSubCommand && !Subs.empty()) {
1880 // Compute the maximum subcommand length...
1881 size_t MaxSubLen = 0;
1882 for (size_t i = 0, e = Subs.size(); i != e; ++i)
1883 MaxSubLen = std::max(MaxSubLen, strlen(Subs[i].first));
1886 outs() << "SUBCOMMANDS:\n\n";
1887 printSubCommands(Subs, MaxSubLen);
1889 outs() << " Type \"" << GlobalParser->ProgramName
1890 << " <subcommand> -help\" to get more help on a specific "
1896 // Compute the maximum argument length...
1897 size_t MaxArgLen = 0;
1898 for (size_t i = 0, e = Opts.size(); i != e; ++i)
1899 MaxArgLen = std::max(MaxArgLen, Opts[i].second->getOptionWidth());
1901 outs() << "OPTIONS:\n";
1902 printOptions(Opts, MaxArgLen);
1904 // Print any extra help the user has declared.
1905 for (auto I : GlobalParser->MoreHelp)
1907 GlobalParser->MoreHelp.clear();
1911 class CategorizedHelpPrinter : public HelpPrinter {
1913 explicit CategorizedHelpPrinter(bool showHidden) : HelpPrinter(showHidden) {}
1915 // Helper function for printOptions().
1916 // It shall return a negative value if A's name should be lexicographically
1917 // ordered before B's name. It returns a value greater than zero if B's name
1918 // should be ordered before A's name, and it returns 0 otherwise.
1919 static int OptionCategoryCompare(OptionCategory *const *A,
1920 OptionCategory *const *B) {
1921 return (*A)->getName().compare((*B)->getName());
1924 // Make sure we inherit our base class's operator=()
1925 using HelpPrinter::operator=;
1928 void printOptions(StrOptionPairVector &Opts, size_t MaxArgLen) override {
1929 std::vector<OptionCategory *> SortedCategories;
1930 std::map<OptionCategory *, std::vector<Option *>> CategorizedOptions;
1932 // Collect registered option categories into vector in preparation for
1934 for (auto I = GlobalParser->RegisteredOptionCategories.begin(),
1935 E = GlobalParser->RegisteredOptionCategories.end();
1937 SortedCategories.push_back(*I);
1940 // Sort the different option categories alphabetically.
1941 assert(SortedCategories.size() > 0 && "No option categories registered!");
1942 array_pod_sort(SortedCategories.begin(), SortedCategories.end(),
1943 OptionCategoryCompare);
1945 // Create map to empty vectors.
1946 for (std::vector<OptionCategory *>::const_iterator
1947 I = SortedCategories.begin(),
1948 E = SortedCategories.end();
1950 CategorizedOptions[*I] = std::vector<Option *>();
1952 // Walk through pre-sorted options and assign into categories.
1953 // Because the options are already alphabetically sorted the
1954 // options within categories will also be alphabetically sorted.
1955 for (size_t I = 0, E = Opts.size(); I != E; ++I) {
1956 Option *Opt = Opts[I].second;
1957 assert(CategorizedOptions.count(Opt->Category) > 0 &&
1958 "Option has an unregistered category");
1959 CategorizedOptions[Opt->Category].push_back(Opt);
1963 for (std::vector<OptionCategory *>::const_iterator
1964 Category = SortedCategories.begin(),
1965 E = SortedCategories.end();
1966 Category != E; ++Category) {
1967 // Hide empty categories for -help, but show for -help-hidden.
1968 const auto &CategoryOptions = CategorizedOptions[*Category];
1969 bool IsEmptyCategory = CategoryOptions.empty();
1970 if (!ShowHidden && IsEmptyCategory)
1973 // Print category information.
1975 outs() << (*Category)->getName() << ":\n";
1977 // Check if description is set.
1978 if (!(*Category)->getDescription().empty())
1979 outs() << (*Category)->getDescription() << "\n\n";
1983 // When using -help-hidden explicitly state if the category has no
1984 // options associated with it.
1985 if (IsEmptyCategory) {
1986 outs() << " This option category has no options.\n";
1989 // Loop over the options in the category and print.
1990 for (const Option *Opt : CategoryOptions)
1991 Opt->printOptionInfo(MaxArgLen);
1996 // This wraps the Uncategorizing and Categorizing printers and decides
1997 // at run time which should be invoked.
1998 class HelpPrinterWrapper {
2000 HelpPrinter &UncategorizedPrinter;
2001 CategorizedHelpPrinter &CategorizedPrinter;
2004 explicit HelpPrinterWrapper(HelpPrinter &UncategorizedPrinter,
2005 CategorizedHelpPrinter &CategorizedPrinter)
2006 : UncategorizedPrinter(UncategorizedPrinter),
2007 CategorizedPrinter(CategorizedPrinter) {}
2009 // Invoke the printer.
2010 void operator=(bool Value);
2013 } // End anonymous namespace
2015 // Declare the four HelpPrinter instances that are used to print out help, or
2016 // help-hidden as an uncategorized list or in categories.
2017 static HelpPrinter UncategorizedNormalPrinter(false);
2018 static HelpPrinter UncategorizedHiddenPrinter(true);
2019 static CategorizedHelpPrinter CategorizedNormalPrinter(false);
2020 static CategorizedHelpPrinter CategorizedHiddenPrinter(true);
2022 // Declare HelpPrinter wrappers that will decide whether or not to invoke
2023 // a categorizing help printer
2024 static HelpPrinterWrapper WrappedNormalPrinter(UncategorizedNormalPrinter,
2025 CategorizedNormalPrinter);
2026 static HelpPrinterWrapper WrappedHiddenPrinter(UncategorizedHiddenPrinter,
2027 CategorizedHiddenPrinter);
2029 // Define a category for generic options that all tools should have.
2030 static cl::OptionCategory GenericCategory("Generic Options");
2032 // Define uncategorized help printers.
2033 // -help-list is hidden by default because if Option categories are being used
2034 // then -help behaves the same as -help-list.
2035 static cl::opt<HelpPrinter, true, parser<bool>> HLOp(
2037 cl::desc("Display list of available options (-help-list-hidden for more)"),
2038 cl::location(UncategorizedNormalPrinter), cl::Hidden, cl::ValueDisallowed,
2039 cl::cat(GenericCategory), cl::sub(*AllSubCommands));
2041 static cl::opt<HelpPrinter, true, parser<bool>>
2042 HLHOp("help-list-hidden", cl::desc("Display list of all available options"),
2043 cl::location(UncategorizedHiddenPrinter), cl::Hidden,
2044 cl::ValueDisallowed, cl::cat(GenericCategory),
2045 cl::sub(*AllSubCommands));
2047 // Define uncategorized/categorized help printers. These printers change their
2048 // behaviour at runtime depending on whether one or more Option categories have
2050 static cl::opt<HelpPrinterWrapper, true, parser<bool>>
2051 HOp("help", cl::desc("Display available options (-help-hidden for more)"),
2052 cl::location(WrappedNormalPrinter), cl::ValueDisallowed,
2053 cl::cat(GenericCategory), cl::sub(*AllSubCommands));
2055 static cl::opt<HelpPrinterWrapper, true, parser<bool>>
2056 HHOp("help-hidden", cl::desc("Display all available options"),
2057 cl::location(WrappedHiddenPrinter), cl::Hidden, cl::ValueDisallowed,
2058 cl::cat(GenericCategory), cl::sub(*AllSubCommands));
2060 static cl::opt<bool> PrintOptions(
2062 cl::desc("Print non-default options after command line parsing"),
2063 cl::Hidden, cl::init(false), cl::cat(GenericCategory),
2064 cl::sub(*AllSubCommands));
2066 static cl::opt<bool> PrintAllOptions(
2067 "print-all-options",
2068 cl::desc("Print all option values after command line parsing"), cl::Hidden,
2069 cl::init(false), cl::cat(GenericCategory), cl::sub(*AllSubCommands));
2071 void HelpPrinterWrapper::operator=(bool Value) {
2075 // Decide which printer to invoke. If more than one option category is
2076 // registered then it is useful to show the categorized help instead of
2077 // uncategorized help.
2078 if (GlobalParser->RegisteredOptionCategories.size() > 1) {
2079 // unhide -help-list option so user can have uncategorized output if they
2081 HLOp.setHiddenFlag(NotHidden);
2083 CategorizedPrinter = true; // Invoke categorized printer
2085 UncategorizedPrinter = true; // Invoke uncategorized printer
2088 // Print the value of each option.
2089 void cl::PrintOptionValues() { GlobalParser->printOptionValues(); }
2091 void CommandLineParser::printOptionValues() {
2092 if (!PrintOptions && !PrintAllOptions)
2095 SmallVector<std::pair<const char *, Option *>, 128> Opts;
2096 sortOpts(ActiveSubCommand->OptionsMap, Opts, /*ShowHidden*/ true);
2098 // Compute the maximum argument length...
2099 size_t MaxArgLen = 0;
2100 for (size_t i = 0, e = Opts.size(); i != e; ++i)
2101 MaxArgLen = std::max(MaxArgLen, Opts[i].second->getOptionWidth());
2103 for (size_t i = 0, e = Opts.size(); i != e; ++i)
2104 Opts[i].second->printOptionValue(MaxArgLen, PrintAllOptions);
2107 static VersionPrinterTy OverrideVersionPrinter = nullptr;
2109 static std::vector<VersionPrinterTy> *ExtraVersionPrinters = nullptr;
2112 class VersionPrinter {
2115 raw_ostream &OS = outs();
2116 #ifdef PACKAGE_VENDOR
2117 OS << PACKAGE_VENDOR << " ";
2119 OS << "LLVM (http://llvm.org/):\n ";
2121 OS << PACKAGE_NAME << " version " << PACKAGE_VERSION;
2122 #ifdef LLVM_VERSION_INFO
2123 OS << " " << LLVM_VERSION_INFO;
2126 #ifndef __OPTIMIZE__
2127 OS << "DEBUG build";
2129 OS << "Optimized build";
2132 OS << " with assertions";
2134 #if LLVM_VERSION_PRINTER_SHOW_HOST_TARGET_INFO
2135 std::string CPU = sys::getHostCPUName();
2136 if (CPU == "generic")
2139 << " Default target: " << sys::getDefaultTargetTriple() << '\n'
2140 << " Host CPU: " << CPU;
2144 void operator=(bool OptionWasSpecified) {
2145 if (!OptionWasSpecified)
2148 if (OverrideVersionPrinter != nullptr) {
2149 OverrideVersionPrinter(outs());
2154 // Iterate over any registered extra printers and call them to add further
2156 if (ExtraVersionPrinters != nullptr) {
2158 for (auto I : *ExtraVersionPrinters)
2165 } // End anonymous namespace
2167 // Define the --version option that prints out the LLVM version for the tool
2168 static VersionPrinter VersionPrinterInstance;
2170 static cl::opt<VersionPrinter, true, parser<bool>>
2171 VersOp("version", cl::desc("Display the version of this program"),
2172 cl::location(VersionPrinterInstance), cl::ValueDisallowed,
2173 cl::cat(GenericCategory));
2175 // Utility function for printing the help message.
2176 void cl::PrintHelpMessage(bool Hidden, bool Categorized) {
2177 if (!Hidden && !Categorized)
2178 UncategorizedNormalPrinter.printHelp();
2179 else if (!Hidden && Categorized)
2180 CategorizedNormalPrinter.printHelp();
2181 else if (Hidden && !Categorized)
2182 UncategorizedHiddenPrinter.printHelp();
2184 CategorizedHiddenPrinter.printHelp();
2187 /// Utility function for printing version number.
2188 void cl::PrintVersionMessage() { VersionPrinterInstance.print(); }
2190 void cl::SetVersionPrinter(VersionPrinterTy func) { OverrideVersionPrinter = func; }
2192 void cl::AddExtraVersionPrinter(VersionPrinterTy func) {
2193 if (!ExtraVersionPrinters)
2194 ExtraVersionPrinters = new std::vector<VersionPrinterTy>;
2196 ExtraVersionPrinters->push_back(func);
2199 StringMap<Option *> &cl::getRegisteredOptions(SubCommand &Sub) {
2200 auto &Subs = GlobalParser->RegisteredSubCommands;
2202 assert(is_contained(Subs, &Sub));
2203 return Sub.OptionsMap;
2206 iterator_range<typename SmallPtrSet<SubCommand *, 4>::iterator>
2207 cl::getRegisteredSubcommands() {
2208 return GlobalParser->getRegisteredSubcommands();
2211 void cl::HideUnrelatedOptions(cl::OptionCategory &Category, SubCommand &Sub) {
2212 for (auto &I : Sub.OptionsMap) {
2213 if (I.second->Category != &Category &&
2214 I.second->Category != &GenericCategory)
2215 I.second->setHiddenFlag(cl::ReallyHidden);
2219 void cl::HideUnrelatedOptions(ArrayRef<const cl::OptionCategory *> Categories,
2221 auto CategoriesBegin = Categories.begin();
2222 auto CategoriesEnd = Categories.end();
2223 for (auto &I : Sub.OptionsMap) {
2224 if (std::find(CategoriesBegin, CategoriesEnd, I.second->Category) ==
2226 I.second->Category != &GenericCategory)
2227 I.second->setHiddenFlag(cl::ReallyHidden);
2231 void cl::ResetCommandLineParser() { GlobalParser->reset(); }
2232 void cl::ResetAllOptionOccurrences() {
2233 GlobalParser->ResetAllOptionOccurrences();
2236 void LLVMParseCommandLineOptions(int argc, const char *const *argv,
2237 const char *Overview) {
2238 llvm::cl::ParseCommandLineOptions(argc, argv, StringRef(Overview),