1 //===- llvm/Support/CommandLine.h - Command line handler --------*- C++ -*-===//
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 should
15 // read the library documentation located in docs/CommandLine.html or looks at
16 // the many example usages in tools/*/*.cpp
18 //===----------------------------------------------------------------------===//
20 #ifndef LLVM_SUPPORT_COMMANDLINE_H
21 #define LLVM_SUPPORT_COMMANDLINE_H
23 #include "llvm/Support/type_traits.h"
24 #include "llvm/Support/Compiler.h"
25 #include "llvm/ADT/SmallVector.h"
26 #include "llvm/ADT/Twine.h"
35 /// cl Namespace - This namespace contains all of the command line option
36 /// processing machinery. It is intentionally a short name to make qualified
40 //===----------------------------------------------------------------------===//
41 // ParseCommandLineOptions - Command line option processing entry point.
43 void ParseCommandLineOptions(int argc, char **argv,
44 const char *Overview = 0,
45 bool ReadResponseFiles = false);
47 //===----------------------------------------------------------------------===//
48 // ParseEnvironmentOptions - Environment variable option processing alternate
51 void ParseEnvironmentOptions(const char *progName, const char *envvar,
52 const char *Overview = 0,
53 bool ReadResponseFiles = false);
55 ///===---------------------------------------------------------------------===//
56 /// SetVersionPrinter - Override the default (LLVM specific) version printer
57 /// used to print out the version when --version is given
58 /// on the command line. This allows other systems using the
59 /// CommandLine utilities to print their own version string.
60 void SetVersionPrinter(void (*func)());
62 ///===---------------------------------------------------------------------===//
63 /// AddExtraVersionPrinter - Add an extra printer to use in addition to the
64 /// default one. This can be called multiple times,
65 /// and each time it adds a new function to the list
66 /// which will be called after the basic LLVM version
67 /// printing is complete. Each can then add additional
68 /// information specific to the tool.
69 void AddExtraVersionPrinter(void (*func)());
72 // PrintOptionValues - Print option values.
73 // With -print-options print the difference between option values and defaults.
74 // With -print-all-options print all option values.
75 // (Currently not perfect, but best-effort.)
76 void PrintOptionValues();
78 // MarkOptionsChanged - Internal helper function.
79 void MarkOptionsChanged();
81 //===----------------------------------------------------------------------===//
82 // Flags permitted to be passed to command line arguments
85 enum NumOccurrencesFlag { // Flags for the number of occurrences allowed
86 Optional = 0x01, // Zero or One occurrence
87 ZeroOrMore = 0x02, // Zero or more occurrences allowed
88 Required = 0x03, // One occurrence required
89 OneOrMore = 0x04, // One or more occurrences required
91 // ConsumeAfter - Indicates that this option is fed anything that follows the
92 // last positional argument required by the application (it is an error if
93 // there are zero positional arguments, and a ConsumeAfter option is used).
94 // Thus, for example, all arguments to LLI are processed until a filename is
95 // found. Once a filename is found, all of the succeeding arguments are
96 // passed, unprocessed, to the ConsumeAfter option.
100 OccurrencesMask = 0x07
103 enum ValueExpected { // Is a value required for the option?
104 ValueOptional = 0x08, // The value can appear... or not
105 ValueRequired = 0x10, // The value is required to appear!
106 ValueDisallowed = 0x18, // A value may not be specified (for flags)
110 enum OptionHidden { // Control whether -help shows this option
111 NotHidden = 0x20, // Option included in -help & -help-hidden
112 Hidden = 0x40, // -help doesn't, but -help-hidden does
113 ReallyHidden = 0x60, // Neither -help nor -help-hidden show this arg
117 // Formatting flags - This controls special features that the option might have
118 // that cause it to be parsed differently...
120 // Prefix - This option allows arguments that are otherwise unrecognized to be
121 // matched by options that are a prefix of the actual value. This is useful for
122 // cases like a linker, where options are typically of the form '-lfoo' or
123 // '-L../../include' where -l or -L are the actual flags. When prefix is
124 // enabled, and used, the value for the flag comes from the suffix of the
127 // Grouping - With this option enabled, multiple letter options are allowed to
128 // bunch together with only a single hyphen for the whole group. This allows
129 // emulation of the behavior that ls uses for example: ls -la === ls -l -a
132 enum FormattingFlags {
133 NormalFormatting = 0x000, // Nothing special
134 Positional = 0x080, // Is a positional argument, no '-' required
135 Prefix = 0x100, // Can this option directly prefix its value?
136 Grouping = 0x180, // Can this option group with other options?
137 FormattingMask = 0x180 // Union of the above flags.
140 enum MiscFlags { // Miscellaneous flags to adjust argument
141 CommaSeparated = 0x200, // Should this cl::list split between commas?
142 PositionalEatsArgs = 0x400, // Should this positional cl::list eat -args?
143 Sink = 0x800, // Should this cl::list eat all unknown options?
144 MiscMask = 0xE00 // Union of the above flags.
149 //===----------------------------------------------------------------------===//
156 // handleOccurrences - Overriden by subclasses to handle the value passed into
157 // an argument. Should return true if there was an error processing the
158 // argument and the program should exit.
160 virtual bool handleOccurrence(unsigned pos, StringRef ArgName,
163 virtual enum ValueExpected getValueExpectedFlagDefault() const {
164 return ValueOptional;
167 // Out of line virtual function to provide home for the class.
168 virtual void anchor();
170 int NumOccurrences; // The number of times specified
171 int Flags; // Flags for the argument
172 unsigned Position; // Position of last occurrence of the option
173 unsigned AdditionalVals;// Greater than 0 for multi-valued option.
174 Option *NextRegistered; // Singly linked list of registered options.
176 const char *ArgStr; // The argument string itself (ex: "help", "o")
177 const char *HelpStr; // The descriptive text message for -help
178 const char *ValueStr; // String describing what the value of this option is
180 inline enum NumOccurrencesFlag getNumOccurrencesFlag() const {
181 return static_cast<enum NumOccurrencesFlag>(Flags & OccurrencesMask);
183 inline enum ValueExpected getValueExpectedFlag() const {
184 int VE = Flags & ValueMask;
185 return VE ? static_cast<enum ValueExpected>(VE)
186 : getValueExpectedFlagDefault();
188 inline enum OptionHidden getOptionHiddenFlag() const {
189 return static_cast<enum OptionHidden>(Flags & HiddenMask);
191 inline enum FormattingFlags getFormattingFlag() const {
192 return static_cast<enum FormattingFlags>(Flags & FormattingMask);
194 inline unsigned getMiscFlags() const {
195 return Flags & MiscMask;
197 inline unsigned getPosition() const { return Position; }
198 inline unsigned getNumAdditionalVals() const { return AdditionalVals; }
200 // hasArgStr - Return true if the argstr != ""
201 bool hasArgStr() const { return ArgStr[0] != 0; }
203 //-------------------------------------------------------------------------===
204 // Accessor functions set by OptionModifiers
206 void setArgStr(const char *S) { ArgStr = S; }
207 void setDescription(const char *S) { HelpStr = S; }
208 void setValueStr(const char *S) { ValueStr = S; }
210 void setFlag(unsigned Flag, unsigned FlagMask) {
215 void setNumOccurrencesFlag(enum NumOccurrencesFlag Val) {
216 setFlag(Val, OccurrencesMask);
218 void setValueExpectedFlag(enum ValueExpected Val) { setFlag(Val, ValueMask); }
219 void setHiddenFlag(enum OptionHidden Val) { setFlag(Val, HiddenMask); }
220 void setFormattingFlag(enum FormattingFlags V) { setFlag(V, FormattingMask); }
221 void setMiscFlag(enum MiscFlags M) { setFlag(M, M); }
222 void setPosition(unsigned pos) { Position = pos; }
224 explicit Option(unsigned DefaultFlags)
225 : NumOccurrences(0), Flags(DefaultFlags | NormalFormatting), Position(0),
226 AdditionalVals(0), NextRegistered(0),
227 ArgStr(""), HelpStr(""), ValueStr("") {
228 assert(getNumOccurrencesFlag() != 0 &&
229 getOptionHiddenFlag() != 0 && "Not all default flags specified!");
232 inline void setNumAdditionalVals(unsigned n) { AdditionalVals = n; }
234 // addArgument - Register this argument with the commandline system.
238 Option *getNextRegisteredOption() const { return NextRegistered; }
240 // Return the width of the option tag for printing...
241 virtual size_t getOptionWidth() const = 0;
243 // printOptionInfo - Print out information about this option. The
244 // to-be-maintained width is specified.
246 virtual void printOptionInfo(size_t GlobalWidth) const = 0;
248 virtual void printOptionValue(size_t GlobalWidth, bool Force) const = 0;
250 virtual void getExtraOptionNames(SmallVectorImpl<const char*> &) {}
252 // addOccurrence - Wrapper around handleOccurrence that enforces Flags.
254 bool addOccurrence(unsigned pos, StringRef ArgName,
255 StringRef Value, bool MultiArg = false);
257 // Prints option name followed by message. Always returns true.
258 bool error(const Twine &Message, StringRef ArgName = StringRef());
261 inline int getNumOccurrences() const { return NumOccurrences; }
266 //===----------------------------------------------------------------------===//
267 // Command line option modifiers that can be used to modify the behavior of
268 // command line option parsers...
271 // desc - Modifier to set the description shown in the -help output...
274 desc(const char *Str) : Desc(Str) {}
275 void apply(Option &O) const { O.setDescription(Desc); }
278 // value_desc - Modifier to set the value description shown in the -help
282 value_desc(const char *Str) : Desc(Str) {}
283 void apply(Option &O) const { O.setValueStr(Desc); }
286 // init - Specify a default (initial) value for the command line argument, if
287 // the default constructor for the argument type does not give you what you
288 // want. This is only valid on "opt" arguments, not on "list" arguments.
293 initializer(const Ty &Val) : Init(Val) {}
296 void apply(Opt &O) const { O.setInitialValue(Init); }
300 initializer<Ty> init(const Ty &Val) {
301 return initializer<Ty>(Val);
305 // location - Allow the user to specify which external variable they want to
306 // store the results of the command line argument processing into, if they don't
307 // want to store it in the option itself.
310 struct LocationClass {
312 LocationClass(Ty &L) : Loc(L) {}
315 void apply(Opt &O) const { O.setLocation(O, Loc); }
319 LocationClass<Ty> location(Ty &L) { return LocationClass<Ty>(L); }
322 //===----------------------------------------------------------------------===//
325 // Support value comparison outside the template.
326 struct GenericOptionValue {
327 virtual ~GenericOptionValue() {}
328 virtual bool compare(const GenericOptionValue &V) const = 0;
331 template<class DataType> struct OptionValue;
333 // The default value safely does nothing. Option value printing is only
335 template<class DataType, bool isClass>
336 struct OptionValueBase : public GenericOptionValue {
337 // Temporary storage for argument passing.
338 typedef OptionValue<DataType> WrapperType;
340 bool hasValue() const { return false; }
342 const DataType &getValue() const { assert(false && "no default value"); }
344 // Some options may take their value from a different data type.
346 void setValue(const DT& /*V*/) {}
348 bool compare(const DataType &/*V*/) const { return false; }
350 virtual bool compare(const GenericOptionValue& /*V*/) const { return false; }
353 // Simple copy of the option value.
354 template<class DataType>
355 class OptionValueCopy : public GenericOptionValue {
359 OptionValueCopy() : Valid(false) {}
361 bool hasValue() const { return Valid; }
363 const DataType &getValue() const {
364 assert(Valid && "invalid option value");
368 void setValue(const DataType &V) { Valid = true; Value = V; }
370 bool compare(const DataType &V) const {
371 return Valid && (Value != V);
374 virtual bool compare(const GenericOptionValue &V) const {
375 const OptionValueCopy<DataType> &VC =
376 static_cast< const OptionValueCopy<DataType>& >(V);
377 if (!VC.hasValue()) return false;
378 return compare(VC.getValue());
382 // Non-class option values.
383 template<class DataType>
384 struct OptionValueBase<DataType, false> : OptionValueCopy<DataType> {
385 typedef DataType WrapperType;
388 // Top-level option class.
389 template<class DataType>
390 struct OptionValue : OptionValueBase<DataType, is_class<DataType>::value> {
393 OptionValue(const DataType& V) {
396 // Some options may take their value from a different data type.
398 OptionValue<DataType> &operator=(const DT& V) {
404 // Other safe-to-copy-by-value common option types.
405 enum boolOrDefault { BOU_UNSET, BOU_TRUE, BOU_FALSE };
407 struct OptionValue<cl::boolOrDefault> : OptionValueCopy<cl::boolOrDefault> {
408 typedef cl::boolOrDefault WrapperType;
412 OptionValue(const cl::boolOrDefault& V) {
415 OptionValue<cl::boolOrDefault> &operator=(const cl::boolOrDefault& V) {
422 struct OptionValue<std::string> : OptionValueCopy<std::string> {
423 typedef StringRef WrapperType;
427 OptionValue(const std::string& V) {
430 OptionValue<std::string> &operator=(const std::string& V) {
436 //===----------------------------------------------------------------------===//
437 // Enum valued command line option
439 #define clEnumVal(ENUMVAL, DESC) #ENUMVAL, int(ENUMVAL), DESC
440 #define clEnumValN(ENUMVAL, FLAGNAME, DESC) FLAGNAME, int(ENUMVAL), DESC
441 #define clEnumValEnd (reinterpret_cast<void*>(0))
443 // values - For custom data types, allow specifying a group of values together
444 // as the values that go into the mapping that the option handler uses. Note
445 // that the values list must always have a 0 at the end of the list to indicate
446 // that the list has ended.
448 template<class DataType>
450 // Use a vector instead of a map, because the lists should be short,
451 // the overhead is less, and most importantly, it keeps them in the order
452 // inserted so we can print our option out nicely.
453 SmallVector<std::pair<const char *, std::pair<int, const char *> >,4> Values;
454 void processValues(va_list Vals);
456 ValuesClass(const char *EnumName, DataType Val, const char *Desc,
458 // Insert the first value, which is required.
459 Values.push_back(std::make_pair(EnumName, std::make_pair(Val, Desc)));
461 // Process the varargs portion of the values...
462 while (const char *enumName = va_arg(ValueArgs, const char *)) {
463 DataType EnumVal = static_cast<DataType>(va_arg(ValueArgs, int));
464 const char *EnumDesc = va_arg(ValueArgs, const char *);
465 Values.push_back(std::make_pair(enumName, // Add value to value map
466 std::make_pair(EnumVal, EnumDesc)));
471 void apply(Opt &O) const {
472 for (unsigned i = 0, e = static_cast<unsigned>(Values.size());
474 O.getParser().addLiteralOption(Values[i].first, Values[i].second.first,
475 Values[i].second.second);
479 template<class DataType>
480 ValuesClass<DataType> END_WITH_NULL values(const char *Arg, DataType Val,
481 const char *Desc, ...) {
483 va_start(ValueArgs, Desc);
484 ValuesClass<DataType> Vals(Arg, Val, Desc, ValueArgs);
489 //===----------------------------------------------------------------------===//
490 // parser class - Parameterizable parser for different data types. By default,
491 // known data types (string, int, bool) have specialized parsers, that do what
492 // you would expect. The default parser, used for data types that are not
493 // built-in, uses a mapping table to map specific options to values, which is
494 // used, among other things, to handle enum types.
496 //--------------------------------------------------
497 // generic_parser_base - This class holds all the non-generic code that we do
498 // not need replicated for every instance of the generic parser. This also
499 // allows us to put stuff into CommandLine.cpp
501 class generic_parser_base {
503 class GenericOptionInfo {
505 GenericOptionInfo(const char *name, const char *helpStr) :
506 Name(name), HelpStr(helpStr) {}
511 virtual ~generic_parser_base() {} // Base class should have virtual-dtor
513 // getNumOptions - Virtual function implemented by generic subclass to
514 // indicate how many entries are in Values.
516 virtual unsigned getNumOptions() const = 0;
518 // getOption - Return option name N.
519 virtual const char *getOption(unsigned N) const = 0;
521 // getDescription - Return description N
522 virtual const char *getDescription(unsigned N) const = 0;
524 // Return the width of the option tag for printing...
525 virtual size_t getOptionWidth(const Option &O) const;
527 virtual const GenericOptionValue &getOptionValue(unsigned N) const = 0;
529 // printOptionInfo - Print out information about this option. The
530 // to-be-maintained width is specified.
532 virtual void printOptionInfo(const Option &O, size_t GlobalWidth) const;
534 void printGenericOptionDiff(const Option &O, const GenericOptionValue &V,
535 const GenericOptionValue &Default,
536 size_t GlobalWidth) const;
538 // printOptionDiff - print the value of an option and it's default.
540 // Template definition ensures that the option and default have the same
541 // DataType (via the same AnyOptionValue).
542 template<class AnyOptionValue>
543 void printOptionDiff(const Option &O, const AnyOptionValue &V,
544 const AnyOptionValue &Default,
545 size_t GlobalWidth) const {
546 printGenericOptionDiff(O, V, Default, GlobalWidth);
549 void initialize(Option &O) {
550 // All of the modifiers for the option have been processed by now, so the
551 // argstr field should be stable, copy it down now.
553 hasArgStr = O.hasArgStr();
556 void getExtraOptionNames(SmallVectorImpl<const char*> &OptionNames) {
557 // If there has been no argstr specified, that means that we need to add an
558 // argument for every possible option. This ensures that our options are
561 for (unsigned i = 0, e = getNumOptions(); i != e; ++i)
562 OptionNames.push_back(getOption(i));
566 enum ValueExpected getValueExpectedFlagDefault() const {
567 // If there is an ArgStr specified, then we are of the form:
569 // -opt=O2 or -opt O2 or -optO2
571 // In which case, the value is required. Otherwise if an arg str has not
572 // been specified, we are of the form:
574 // -O2 or O2 or -la (where -l and -a are separate options)
576 // If this is the case, we cannot allow a value.
579 return ValueRequired;
581 return ValueDisallowed;
584 // findOption - Return the option number corresponding to the specified
585 // argument string. If the option is not found, getNumOptions() is returned.
587 unsigned findOption(const char *Name);
593 // Default parser implementation - This implementation depends on having a
594 // mapping of recognized options to values of some sort. In addition to this,
595 // each entry in the mapping also tracks a help message that is printed with the
596 // command line option for -help. Because this is a simple mapping parser, the
597 // data type can be any unsupported type.
599 template <class DataType>
600 class parser : public generic_parser_base {
602 class OptionInfo : public GenericOptionInfo {
604 OptionInfo(const char *name, DataType v, const char *helpStr) :
605 GenericOptionInfo(name, helpStr), V(v) {}
606 OptionValue<DataType> V;
608 SmallVector<OptionInfo, 8> Values;
610 typedef DataType parser_data_type;
612 // Implement virtual functions needed by generic_parser_base
613 unsigned getNumOptions() const { return unsigned(Values.size()); }
614 const char *getOption(unsigned N) const { return Values[N].Name; }
615 const char *getDescription(unsigned N) const {
616 return Values[N].HelpStr;
619 // getOptionValue - Return the value of option name N.
620 virtual const GenericOptionValue &getOptionValue(unsigned N) const {
624 // parse - Return true on error.
625 bool parse(Option &O, StringRef ArgName, StringRef Arg, DataType &V) {
632 for (unsigned i = 0, e = static_cast<unsigned>(Values.size());
634 if (Values[i].Name == ArgVal) {
635 V = Values[i].V.getValue();
639 return O.error("Cannot find option named '" + ArgVal + "'!");
642 /// addLiteralOption - Add an entry to the mapping table.
645 void addLiteralOption(const char *Name, const DT &V, const char *HelpStr) {
646 assert(findOption(Name) == Values.size() && "Option already exists!");
647 OptionInfo X(Name, static_cast<DataType>(V), HelpStr);
649 MarkOptionsChanged();
652 /// removeLiteralOption - Remove the specified option.
654 void removeLiteralOption(const char *Name) {
655 unsigned N = findOption(Name);
656 assert(N != Values.size() && "Option not found!");
657 Values.erase(Values.begin()+N);
661 //--------------------------------------------------
662 // basic_parser - Super class of parsers to provide boilerplate code
664 class basic_parser_impl { // non-template implementation of basic_parser<t>
666 virtual ~basic_parser_impl() {}
668 enum ValueExpected getValueExpectedFlagDefault() const {
669 return ValueRequired;
672 void getExtraOptionNames(SmallVectorImpl<const char*> &) {}
674 void initialize(Option &) {}
676 // Return the width of the option tag for printing...
677 size_t getOptionWidth(const Option &O) const;
679 // printOptionInfo - Print out information about this option. The
680 // to-be-maintained width is specified.
682 void printOptionInfo(const Option &O, size_t GlobalWidth) const;
684 // printOptionNoValue - Print a placeholder for options that don't yet support
685 // printOptionDiff().
686 void printOptionNoValue(const Option &O, size_t GlobalWidth) const;
688 // getValueName - Overload in subclass to provide a better default value.
689 virtual const char *getValueName() const { return "value"; }
691 // An out-of-line virtual method to provide a 'home' for this class.
692 virtual void anchor();
695 // A helper for basic_parser::printOptionDiff.
696 void printOptionName(const Option &O, size_t GlobalWidth) const;
699 // basic_parser - The real basic parser is just a template wrapper that provides
700 // a typedef for the provided data type.
702 template<class DataType>
703 class basic_parser : public basic_parser_impl {
705 typedef DataType parser_data_type;
706 typedef OptionValue<DataType> OptVal;
709 //--------------------------------------------------
713 class parser<bool> : public basic_parser<bool> {
717 // parse - Return true on error.
718 bool parse(Option &O, StringRef ArgName, StringRef Arg, bool &Val);
721 void initialize(Opt &O) {
725 enum ValueExpected getValueExpectedFlagDefault() const {
726 return ValueOptional;
729 // getValueName - Do not print =<value> at all.
730 virtual const char *getValueName() const { return 0; }
732 void printOptionDiff(const Option &O, bool V, OptVal Default,
733 size_t GlobalWidth) const;
735 // An out-of-line virtual method to provide a 'home' for this class.
736 virtual void anchor();
739 EXTERN_TEMPLATE_INSTANTIATION(class basic_parser<bool>);
741 //--------------------------------------------------
742 // parser<boolOrDefault>
744 class parser<boolOrDefault> : public basic_parser<boolOrDefault> {
746 // parse - Return true on error.
747 bool parse(Option &O, StringRef ArgName, StringRef Arg, boolOrDefault &Val);
749 enum ValueExpected getValueExpectedFlagDefault() const {
750 return ValueOptional;
753 // getValueName - Do not print =<value> at all.
754 virtual const char *getValueName() const { return 0; }
756 void printOptionDiff(const Option &O, boolOrDefault V, OptVal Default,
757 size_t GlobalWidth) const;
759 // An out-of-line virtual method to provide a 'home' for this class.
760 virtual void anchor();
763 EXTERN_TEMPLATE_INSTANTIATION(class basic_parser<boolOrDefault>);
765 //--------------------------------------------------
769 class parser<int> : public basic_parser<int> {
771 // parse - Return true on error.
772 bool parse(Option &O, StringRef ArgName, StringRef Arg, int &Val);
774 // getValueName - Overload in subclass to provide a better default value.
775 virtual const char *getValueName() const { return "int"; }
777 void printOptionDiff(const Option &O, int V, OptVal Default,
778 size_t GlobalWidth) const;
780 // An out-of-line virtual method to provide a 'home' for this class.
781 virtual void anchor();
784 EXTERN_TEMPLATE_INSTANTIATION(class basic_parser<int>);
787 //--------------------------------------------------
791 class parser<unsigned> : public basic_parser<unsigned> {
793 // parse - Return true on error.
794 bool parse(Option &O, StringRef ArgName, StringRef Arg, unsigned &Val);
796 // getValueName - Overload in subclass to provide a better default value.
797 virtual const char *getValueName() const { return "uint"; }
799 void printOptionDiff(const Option &O, unsigned V, OptVal Default,
800 size_t GlobalWidth) const;
802 // An out-of-line virtual method to provide a 'home' for this class.
803 virtual void anchor();
806 EXTERN_TEMPLATE_INSTANTIATION(class basic_parser<unsigned>);
808 //--------------------------------------------------
812 class parser<double> : public basic_parser<double> {
814 // parse - Return true on error.
815 bool parse(Option &O, StringRef ArgName, StringRef Arg, double &Val);
817 // getValueName - Overload in subclass to provide a better default value.
818 virtual const char *getValueName() const { return "number"; }
820 void printOptionDiff(const Option &O, double V, OptVal Default,
821 size_t GlobalWidth) const;
823 // An out-of-line virtual method to provide a 'home' for this class.
824 virtual void anchor();
827 EXTERN_TEMPLATE_INSTANTIATION(class basic_parser<double>);
829 //--------------------------------------------------
833 class parser<float> : public basic_parser<float> {
835 // parse - Return true on error.
836 bool parse(Option &O, StringRef ArgName, StringRef Arg, float &Val);
838 // getValueName - Overload in subclass to provide a better default value.
839 virtual const char *getValueName() const { return "number"; }
841 void printOptionDiff(const Option &O, float V, OptVal Default,
842 size_t GlobalWidth) const;
844 // An out-of-line virtual method to provide a 'home' for this class.
845 virtual void anchor();
848 EXTERN_TEMPLATE_INSTANTIATION(class basic_parser<float>);
850 //--------------------------------------------------
851 // parser<std::string>
854 class parser<std::string> : public basic_parser<std::string> {
856 // parse - Return true on error.
857 bool parse(Option &, StringRef, StringRef Arg, std::string &Value) {
862 // getValueName - Overload in subclass to provide a better default value.
863 virtual const char *getValueName() const { return "string"; }
865 void printOptionDiff(const Option &O, StringRef V, OptVal Default,
866 size_t GlobalWidth) const;
868 // An out-of-line virtual method to provide a 'home' for this class.
869 virtual void anchor();
872 EXTERN_TEMPLATE_INSTANTIATION(class basic_parser<std::string>);
874 //--------------------------------------------------
878 class parser<char> : public basic_parser<char> {
880 // parse - Return true on error.
881 bool parse(Option &, StringRef, StringRef Arg, char &Value) {
886 // getValueName - Overload in subclass to provide a better default value.
887 virtual const char *getValueName() const { return "char"; }
889 void printOptionDiff(const Option &O, char V, OptVal Default,
890 size_t GlobalWidth) const;
892 // An out-of-line virtual method to provide a 'home' for this class.
893 virtual void anchor();
896 EXTERN_TEMPLATE_INSTANTIATION(class basic_parser<char>);
898 //--------------------------------------------------
901 // This collection of wrappers is the intermediary between class opt and class
902 // parser to handle all the template nastiness.
904 // This overloaded function is selected by the generic parser.
905 template<class ParserClass, class DT>
906 void printOptionDiff(const Option &O, const generic_parser_base &P, const DT &V,
907 const OptionValue<DT> &Default, size_t GlobalWidth) {
908 OptionValue<DT> OV = V;
909 P.printOptionDiff(O, OV, Default, GlobalWidth);
912 // This is instantiated for basic parsers when the parsed value has a different
913 // type than the option value. e.g. HelpPrinter.
914 template<class ParserDT, class ValDT>
915 struct OptionDiffPrinter {
916 void print(const Option &O, const parser<ParserDT> P, const ValDT &/*V*/,
917 const OptionValue<ValDT> &/*Default*/, size_t GlobalWidth) {
918 P.printOptionNoValue(O, GlobalWidth);
922 // This is instantiated for basic parsers when the parsed value has the same
923 // type as the option value.
925 struct OptionDiffPrinter<DT, DT> {
926 void print(const Option &O, const parser<DT> P, const DT &V,
927 const OptionValue<DT> &Default, size_t GlobalWidth) {
928 P.printOptionDiff(O, V, Default, GlobalWidth);
932 // This overloaded function is selected by the basic parser, which may parse a
933 // different type than the option type.
934 template<class ParserClass, class ValDT>
935 void printOptionDiff(
937 const basic_parser<typename ParserClass::parser_data_type> &P,
938 const ValDT &V, const OptionValue<ValDT> &Default,
939 size_t GlobalWidth) {
941 OptionDiffPrinter<typename ParserClass::parser_data_type, ValDT> printer;
942 printer.print(O, static_cast<const ParserClass&>(P), V, Default,
946 //===----------------------------------------------------------------------===//
947 // applicator class - This class is used because we must use partial
948 // specialization to handle literal string arguments specially (const char* does
949 // not correctly respond to the apply method). Because the syntax to use this
950 // is a pain, we have the 'apply' method below to handle the nastiness...
952 template<class Mod> struct applicator {
954 static void opt(const Mod &M, Opt &O) { M.apply(O); }
957 // Handle const char* as a special case...
958 template<unsigned n> struct applicator<char[n]> {
960 static void opt(const char *Str, Opt &O) { O.setArgStr(Str); }
962 template<unsigned n> struct applicator<const char[n]> {
964 static void opt(const char *Str, Opt &O) { O.setArgStr(Str); }
966 template<> struct applicator<const char*> {
968 static void opt(const char *Str, Opt &O) { O.setArgStr(Str); }
971 template<> struct applicator<NumOccurrencesFlag> {
972 static void opt(NumOccurrencesFlag NO, Option &O) {
973 O.setNumOccurrencesFlag(NO);
976 template<> struct applicator<ValueExpected> {
977 static void opt(ValueExpected VE, Option &O) { O.setValueExpectedFlag(VE); }
979 template<> struct applicator<OptionHidden> {
980 static void opt(OptionHidden OH, Option &O) { O.setHiddenFlag(OH); }
982 template<> struct applicator<FormattingFlags> {
983 static void opt(FormattingFlags FF, Option &O) { O.setFormattingFlag(FF); }
985 template<> struct applicator<MiscFlags> {
986 static void opt(MiscFlags MF, Option &O) { O.setMiscFlag(MF); }
989 // apply method - Apply a modifier to an option in a type safe way.
990 template<class Mod, class Opt>
991 void apply(const Mod &M, Opt *O) {
992 applicator<Mod>::opt(M, *O);
995 //===----------------------------------------------------------------------===//
998 // Default storage class definition: external storage. This implementation
999 // assumes the user will specify a variable to store the data into with the
1000 // cl::location(x) modifier.
1002 template<class DataType, bool ExternalStorage, bool isClass>
1004 DataType *Location; // Where to store the object...
1005 OptionValue<DataType> Default;
1007 void check() const {
1008 assert(Location != 0 && "cl::location(...) not specified for a command "
1009 "line option with external storage, "
1010 "or cl::init specified before cl::location()!!");
1013 opt_storage() : Location(0) {}
1015 bool setLocation(Option &O, DataType &L) {
1017 return O.error("cl::location(x) specified more than once!");
1024 void setValue(const T &V, bool initial = false) {
1031 DataType &getValue() { check(); return *Location; }
1032 const DataType &getValue() const { check(); return *Location; }
1034 operator DataType() const { return this->getValue(); }
1036 const OptionValue<DataType> &getDefault() const { return Default; }
1039 // Define how to hold a class type object, such as a string. Since we can
1040 // inherit from a class, we do so. This makes us exactly compatible with the
1041 // object in all cases that it is used.
1043 template<class DataType>
1044 class opt_storage<DataType,false,true> : public DataType {
1046 OptionValue<DataType> Default;
1049 void setValue(const T &V, bool initial = false) {
1050 DataType::operator=(V);
1055 DataType &getValue() { return *this; }
1056 const DataType &getValue() const { return *this; }
1058 const OptionValue<DataType> &getDefault() const { return Default; }
1061 // Define a partial specialization to handle things we cannot inherit from. In
1062 // this case, we store an instance through containment, and overload operators
1063 // to get at the value.
1065 template<class DataType>
1066 class opt_storage<DataType, false, false> {
1069 OptionValue<DataType> Default;
1071 // Make sure we initialize the value with the default constructor for the
1073 opt_storage() : Value(DataType()) {}
1076 void setValue(const T &V, bool initial = false) {
1081 DataType &getValue() { return Value; }
1082 DataType getValue() const { return Value; }
1084 const OptionValue<DataType> &getDefault() const { return Default; }
1086 operator DataType() const { return getValue(); }
1088 // If the datatype is a pointer, support -> on it.
1089 DataType operator->() const { return Value; }
1093 //===----------------------------------------------------------------------===//
1094 // opt - A scalar command line option.
1096 template <class DataType, bool ExternalStorage = false,
1097 class ParserClass = parser<DataType> >
1098 class opt : public Option,
1099 public opt_storage<DataType, ExternalStorage,
1100 is_class<DataType>::value> {
1103 virtual bool handleOccurrence(unsigned pos, StringRef ArgName,
1105 typename ParserClass::parser_data_type Val =
1106 typename ParserClass::parser_data_type();
1107 if (Parser.parse(*this, ArgName, Arg, Val))
1108 return true; // Parse error!
1109 this->setValue(Val);
1110 this->setPosition(pos);
1114 virtual enum ValueExpected getValueExpectedFlagDefault() const {
1115 return Parser.getValueExpectedFlagDefault();
1117 virtual void getExtraOptionNames(SmallVectorImpl<const char*> &OptionNames) {
1118 return Parser.getExtraOptionNames(OptionNames);
1121 // Forward printing stuff to the parser...
1122 virtual size_t getOptionWidth() const {return Parser.getOptionWidth(*this);}
1123 virtual void printOptionInfo(size_t GlobalWidth) const {
1124 Parser.printOptionInfo(*this, GlobalWidth);
1127 virtual void printOptionValue(size_t GlobalWidth, bool Force) const {
1128 if (Force || this->getDefault().compare(this->getValue())) {
1129 cl::printOptionDiff<ParserClass>(
1130 *this, Parser, this->getValue(), this->getDefault(), GlobalWidth);
1136 Parser.initialize(*this);
1139 // setInitialValue - Used by the cl::init modifier...
1140 void setInitialValue(const DataType &V) { this->setValue(V, true); }
1142 ParserClass &getParser() { return Parser; }
1145 DataType &operator=(const T &Val) {
1146 this->setValue(Val);
1147 return this->getValue();
1152 explicit opt(const M0t &M0) : Option(Optional | NotHidden) {
1158 template<class M0t, class M1t>
1159 opt(const M0t &M0, const M1t &M1) : Option(Optional | NotHidden) {
1160 apply(M0, this); apply(M1, this);
1165 template<class M0t, class M1t, class M2t>
1166 opt(const M0t &M0, const M1t &M1,
1167 const M2t &M2) : Option(Optional | NotHidden) {
1168 apply(M0, this); apply(M1, this); apply(M2, this);
1172 template<class M0t, class M1t, class M2t, class M3t>
1173 opt(const M0t &M0, const M1t &M1, const M2t &M2,
1174 const M3t &M3) : Option(Optional | NotHidden) {
1175 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
1179 template<class M0t, class M1t, class M2t, class M3t, class M4t>
1180 opt(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3,
1181 const M4t &M4) : Option(Optional | NotHidden) {
1182 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
1187 template<class M0t, class M1t, class M2t, class M3t,
1188 class M4t, class M5t>
1189 opt(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3,
1190 const M4t &M4, const M5t &M5) : Option(Optional | NotHidden) {
1191 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
1192 apply(M4, this); apply(M5, this);
1196 template<class M0t, class M1t, class M2t, class M3t,
1197 class M4t, class M5t, class M6t>
1198 opt(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3,
1199 const M4t &M4, const M5t &M5,
1200 const M6t &M6) : Option(Optional | NotHidden) {
1201 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
1202 apply(M4, this); apply(M5, this); apply(M6, this);
1206 template<class M0t, class M1t, class M2t, class M3t,
1207 class M4t, class M5t, class M6t, class M7t>
1208 opt(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3,
1209 const M4t &M4, const M5t &M5, const M6t &M6,
1210 const M7t &M7) : Option(Optional | NotHidden) {
1211 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
1212 apply(M4, this); apply(M5, this); apply(M6, this); apply(M7, this);
1217 EXTERN_TEMPLATE_INSTANTIATION(class opt<unsigned>);
1218 EXTERN_TEMPLATE_INSTANTIATION(class opt<int>);
1219 EXTERN_TEMPLATE_INSTANTIATION(class opt<std::string>);
1220 EXTERN_TEMPLATE_INSTANTIATION(class opt<char>);
1221 EXTERN_TEMPLATE_INSTANTIATION(class opt<bool>);
1223 //===----------------------------------------------------------------------===//
1224 // list_storage class
1226 // Default storage class definition: external storage. This implementation
1227 // assumes the user will specify a variable to store the data into with the
1228 // cl::location(x) modifier.
1230 template<class DataType, class StorageClass>
1231 class list_storage {
1232 StorageClass *Location; // Where to store the object...
1235 list_storage() : Location(0) {}
1237 bool setLocation(Option &O, StorageClass &L) {
1239 return O.error("cl::location(x) specified more than once!");
1245 void addValue(const T &V) {
1246 assert(Location != 0 && "cl::location(...) not specified for a command "
1247 "line option with external storage!");
1248 Location->push_back(V);
1253 // Define how to hold a class type object, such as a string. Since we can
1254 // inherit from a class, we do so. This makes us exactly compatible with the
1255 // object in all cases that it is used.
1257 template<class DataType>
1258 class list_storage<DataType, bool> : public std::vector<DataType> {
1261 void addValue(const T &V) { std::vector<DataType>::push_back(V); }
1265 //===----------------------------------------------------------------------===//
1266 // list - A list of command line options.
1268 template <class DataType, class Storage = bool,
1269 class ParserClass = parser<DataType> >
1270 class list : public Option, public list_storage<DataType, Storage> {
1271 std::vector<unsigned> Positions;
1274 virtual enum ValueExpected getValueExpectedFlagDefault() const {
1275 return Parser.getValueExpectedFlagDefault();
1277 virtual void getExtraOptionNames(SmallVectorImpl<const char*> &OptionNames) {
1278 return Parser.getExtraOptionNames(OptionNames);
1281 virtual bool handleOccurrence(unsigned pos, StringRef ArgName, StringRef Arg){
1282 typename ParserClass::parser_data_type Val =
1283 typename ParserClass::parser_data_type();
1284 if (Parser.parse(*this, ArgName, Arg, Val))
1285 return true; // Parse Error!
1286 list_storage<DataType, Storage>::addValue(Val);
1288 Positions.push_back(pos);
1292 // Forward printing stuff to the parser...
1293 virtual size_t getOptionWidth() const {return Parser.getOptionWidth(*this);}
1294 virtual void printOptionInfo(size_t GlobalWidth) const {
1295 Parser.printOptionInfo(*this, GlobalWidth);
1298 // Unimplemented: list options don't currently store their default value.
1299 virtual void printOptionValue(size_t /*GlobalWidth*/, bool /*Force*/) const {}
1303 Parser.initialize(*this);
1306 ParserClass &getParser() { return Parser; }
1308 unsigned getPosition(unsigned optnum) const {
1309 assert(optnum < this->size() && "Invalid option index");
1310 return Positions[optnum];
1313 void setNumAdditionalVals(unsigned n) {
1314 Option::setNumAdditionalVals(n);
1319 explicit list(const M0t &M0) : Option(ZeroOrMore | NotHidden) {
1324 template<class M0t, class M1t>
1325 list(const M0t &M0, const M1t &M1) : Option(ZeroOrMore | NotHidden) {
1326 apply(M0, this); apply(M1, this);
1330 template<class M0t, class M1t, class M2t>
1331 list(const M0t &M0, const M1t &M1, const M2t &M2)
1332 : Option(ZeroOrMore | NotHidden) {
1333 apply(M0, this); apply(M1, this); apply(M2, this);
1337 template<class M0t, class M1t, class M2t, class M3t>
1338 list(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3)
1339 : Option(ZeroOrMore | NotHidden) {
1340 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
1344 template<class M0t, class M1t, class M2t, class M3t, class M4t>
1345 list(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3,
1346 const M4t &M4) : Option(ZeroOrMore | NotHidden) {
1347 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
1352 template<class M0t, class M1t, class M2t, class M3t,
1353 class M4t, class M5t>
1354 list(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3,
1355 const M4t &M4, const M5t &M5) : Option(ZeroOrMore | NotHidden) {
1356 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
1357 apply(M4, this); apply(M5, this);
1361 template<class M0t, class M1t, class M2t, class M3t,
1362 class M4t, class M5t, class M6t>
1363 list(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3,
1364 const M4t &M4, const M5t &M5, const M6t &M6)
1365 : Option(ZeroOrMore | NotHidden) {
1366 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
1367 apply(M4, this); apply(M5, this); apply(M6, this);
1371 template<class M0t, class M1t, class M2t, class M3t,
1372 class M4t, class M5t, class M6t, class M7t>
1373 list(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3,
1374 const M4t &M4, const M5t &M5, const M6t &M6,
1375 const M7t &M7) : Option(ZeroOrMore | NotHidden) {
1376 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
1377 apply(M4, this); apply(M5, this); apply(M6, this); apply(M7, this);
1382 // multi_val - Modifier to set the number of additional values.
1384 unsigned AdditionalVals;
1385 explicit multi_val(unsigned N) : AdditionalVals(N) {}
1387 template <typename D, typename S, typename P>
1388 void apply(list<D, S, P> &L) const { L.setNumAdditionalVals(AdditionalVals); }
1392 //===----------------------------------------------------------------------===//
1393 // bits_storage class
1395 // Default storage class definition: external storage. This implementation
1396 // assumes the user will specify a variable to store the data into with the
1397 // cl::location(x) modifier.
1399 template<class DataType, class StorageClass>
1400 class bits_storage {
1401 unsigned *Location; // Where to store the bits...
1404 static unsigned Bit(const T &V) {
1405 unsigned BitPos = reinterpret_cast<unsigned>(V);
1406 assert(BitPos < sizeof(unsigned) * CHAR_BIT &&
1407 "enum exceeds width of bit vector!");
1412 bits_storage() : Location(0) {}
1414 bool setLocation(Option &O, unsigned &L) {
1416 return O.error("cl::location(x) specified more than once!");
1422 void addValue(const T &V) {
1423 assert(Location != 0 && "cl::location(...) not specified for a command "
1424 "line option with external storage!");
1425 *Location |= Bit(V);
1428 unsigned getBits() { return *Location; }
1431 bool isSet(const T &V) {
1432 return (*Location & Bit(V)) != 0;
1437 // Define how to hold bits. Since we can inherit from a class, we do so.
1438 // This makes us exactly compatible with the bits in all cases that it is used.
1440 template<class DataType>
1441 class bits_storage<DataType, bool> {
1442 unsigned Bits; // Where to store the bits...
1445 static unsigned Bit(const T &V) {
1446 unsigned BitPos = (unsigned)V;
1447 assert(BitPos < sizeof(unsigned) * CHAR_BIT &&
1448 "enum exceeds width of bit vector!");
1454 void addValue(const T &V) {
1458 unsigned getBits() { return Bits; }
1461 bool isSet(const T &V) {
1462 return (Bits & Bit(V)) != 0;
1467 //===----------------------------------------------------------------------===//
1468 // bits - A bit vector of command options.
1470 template <class DataType, class Storage = bool,
1471 class ParserClass = parser<DataType> >
1472 class bits : public Option, public bits_storage<DataType, Storage> {
1473 std::vector<unsigned> Positions;
1476 virtual enum ValueExpected getValueExpectedFlagDefault() const {
1477 return Parser.getValueExpectedFlagDefault();
1479 virtual void getExtraOptionNames(SmallVectorImpl<const char*> &OptionNames) {
1480 return Parser.getExtraOptionNames(OptionNames);
1483 virtual bool handleOccurrence(unsigned pos, StringRef ArgName, StringRef Arg){
1484 typename ParserClass::parser_data_type Val =
1485 typename ParserClass::parser_data_type();
1486 if (Parser.parse(*this, ArgName, Arg, Val))
1487 return true; // Parse Error!
1490 Positions.push_back(pos);
1494 // Forward printing stuff to the parser...
1495 virtual size_t getOptionWidth() const {return Parser.getOptionWidth(*this);}
1496 virtual void printOptionInfo(size_t GlobalWidth) const {
1497 Parser.printOptionInfo(*this, GlobalWidth);
1500 // Unimplemented: bits options don't currently store their default values.
1501 virtual void printOptionValue(size_t /*GlobalWidth*/, bool /*Force*/) const {}
1505 Parser.initialize(*this);
1508 ParserClass &getParser() { return Parser; }
1510 unsigned getPosition(unsigned optnum) const {
1511 assert(optnum < this->size() && "Invalid option index");
1512 return Positions[optnum];
1517 explicit bits(const M0t &M0) : Option(ZeroOrMore | NotHidden) {
1522 template<class M0t, class M1t>
1523 bits(const M0t &M0, const M1t &M1) : Option(ZeroOrMore | NotHidden) {
1524 apply(M0, this); apply(M1, this);
1528 template<class M0t, class M1t, class M2t>
1529 bits(const M0t &M0, const M1t &M1, const M2t &M2)
1530 : Option(ZeroOrMore | NotHidden) {
1531 apply(M0, this); apply(M1, this); apply(M2, this);
1535 template<class M0t, class M1t, class M2t, class M3t>
1536 bits(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3)
1537 : Option(ZeroOrMore | NotHidden) {
1538 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
1542 template<class M0t, class M1t, class M2t, class M3t, class M4t>
1543 bits(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3,
1544 const M4t &M4) : Option(ZeroOrMore | NotHidden) {
1545 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
1550 template<class M0t, class M1t, class M2t, class M3t,
1551 class M4t, class M5t>
1552 bits(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3,
1553 const M4t &M4, const M5t &M5) : Option(ZeroOrMore | NotHidden) {
1554 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
1555 apply(M4, this); apply(M5, this);
1559 template<class M0t, class M1t, class M2t, class M3t,
1560 class M4t, class M5t, class M6t>
1561 bits(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3,
1562 const M4t &M4, const M5t &M5, const M6t &M6)
1563 : Option(ZeroOrMore | NotHidden) {
1564 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
1565 apply(M4, this); apply(M5, this); apply(M6, this);
1569 template<class M0t, class M1t, class M2t, class M3t,
1570 class M4t, class M5t, class M6t, class M7t>
1571 bits(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3,
1572 const M4t &M4, const M5t &M5, const M6t &M6,
1573 const M7t &M7) : Option(ZeroOrMore | NotHidden) {
1574 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
1575 apply(M4, this); apply(M5, this); apply(M6, this); apply(M7, this);
1580 //===----------------------------------------------------------------------===//
1581 // Aliased command line option (alias this name to a preexisting name)
1584 class alias : public Option {
1586 virtual bool handleOccurrence(unsigned pos, StringRef /*ArgName*/,
1588 return AliasFor->handleOccurrence(pos, AliasFor->ArgStr, Arg);
1590 // Handle printing stuff...
1591 virtual size_t getOptionWidth() const;
1592 virtual void printOptionInfo(size_t GlobalWidth) const;
1594 // Aliases do not need to print their values.
1595 virtual void printOptionValue(size_t /*GlobalWidth*/, bool /*Force*/) const {}
1599 error("cl::alias must have argument name specified!");
1601 error("cl::alias must have an cl::aliasopt(option) specified!");
1605 void setAliasFor(Option &O) {
1607 error("cl::alias must only have one cl::aliasopt(...) specified!");
1613 explicit alias(const M0t &M0) : Option(Optional | Hidden), AliasFor(0) {
1618 template<class M0t, class M1t>
1619 alias(const M0t &M0, const M1t &M1) : Option(Optional | Hidden), AliasFor(0) {
1620 apply(M0, this); apply(M1, this);
1624 template<class M0t, class M1t, class M2t>
1625 alias(const M0t &M0, const M1t &M1, const M2t &M2)
1626 : Option(Optional | Hidden), AliasFor(0) {
1627 apply(M0, this); apply(M1, this); apply(M2, this);
1631 template<class M0t, class M1t, class M2t, class M3t>
1632 alias(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3)
1633 : Option(Optional | Hidden), AliasFor(0) {
1634 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
1639 // aliasfor - Modifier to set the option an alias aliases.
1642 explicit aliasopt(Option &O) : Opt(O) {}
1643 void apply(alias &A) const { A.setAliasFor(Opt); }
1646 // extrahelp - provide additional help at the end of the normal help
1647 // output. All occurrences of cl::extrahelp will be accumulated and
1648 // printed to stderr at the end of the regular help, just before
1651 const char * morehelp;
1652 explicit extrahelp(const char* help);
1655 void PrintVersionMessage();
1656 // This function just prints the help message, exactly the same way as if the
1657 // -help option had been given on the command line.
1658 // NOTE: THIS FUNCTION TERMINATES THE PROGRAM!
1659 void PrintHelpMessage();
1661 } // End namespace cl
1663 } // End namespace llvm