1 //===- Support/CommandLine.h - Flexible Command line parser ------*- C++ -*--=//
3 // This class implements a command line argument processor that is useful when
4 // creating a tool. It provides a simple, minimalistic interface that is easily
5 // extensible and supports nonlocal (library) command line options.
7 // Note that rather than trying to figure out what this code does, you should
8 // read the library documentation located in docs/CommandLine.html or looks at
9 // the many example usages in tools/*/*.cpp
11 //===----------------------------------------------------------------------===//
13 #ifndef LLVM_SUPPORT_COMMANDLINE_H
14 #define LLVM_SUPPORT_COMMANDLINE_H
20 #include "boost/type_traits/object_traits.hpp"
22 namespace cl { // Short namespace to make usage concise
24 //===----------------------------------------------------------------------===//
25 // ParseCommandLineOptions - Command line option processing entry point.
27 void cl::ParseCommandLineOptions(int &argc, char **argv,
28 const char *Overview = 0);
30 //===----------------------------------------------------------------------===//
31 // Flags permitted to be passed to command line arguments
34 enum NumOccurances { // Flags for the number of occurances allowed...
35 Optional = 0x01, // Zero or One occurance
36 ZeroOrMore = 0x02, // Zero or more occurances allowed
37 Required = 0x03, // One occurance required
38 OneOrMore = 0x04, // One or more occurances required
40 // ConsumeAfter - Indicates that this option is fed anything that follows the
41 // last positional argument required by the application (it is an error if
42 // there are zero positional arguments, and a ConsumeAfter option is used).
43 // Thus, for example, all arguments to LLI are processed until a filename is
44 // found. Once a filename is found, all of the succeeding arguments are
45 // passed, unprocessed, to the ConsumeAfter option.
49 OccurancesMask = 0x07,
52 enum ValueExpected { // Is a value required for the option?
53 ValueOptional = 0x08, // The value can oppear... or not
54 ValueRequired = 0x10, // The value is required to appear!
55 ValueDisallowed = 0x18, // A value may not be specified (for flags)
59 enum OptionHidden { // Control whether -help shows this option
60 NotHidden = 0x20, // Option included in --help & --help-hidden
61 Hidden = 0x40, // -help doesn't, but --help-hidden does
62 ReallyHidden = 0x60, // Neither --help nor --help-hidden show this arg
66 // Formatting flags - This controls special features that the option might have
67 // that cause it to be parsed differently...
69 // Prefix - This option allows arguments that are otherwise unrecognized to be
70 // matched by options that are a prefix of the actual value. This is useful for
71 // cases like a linker, where options are typically of the form '-lfoo' or
72 // '-L../../include' where -l or -L are the actual flags. When prefix is
73 // enabled, and used, the value for the flag comes from the suffix of the
76 // Grouping - With this option enabled, multiple letter options are allowed to
77 // bunch together with only a single hyphen for the whole group. This allows
78 // emulation of the behavior that ls uses for example: ls -la === ls -l -a
81 enum FormattingFlags {
82 NormalFormatting = 0x000, // Nothing special
83 Positional = 0x080, // Is a positional argument, no '-' required
84 Prefix = 0x100, // Can this option directly prefix its value?
85 Grouping = 0x180, // Can this option group with other options?
86 FormattingMask = 0x180,
90 //===----------------------------------------------------------------------===//
95 friend void cl::ParseCommandLineOptions(int &, char **, const char *, int);
98 // handleOccurances - Overriden by subclasses to handle the value passed into
99 // an argument. Should return true if there was an error processing the
100 // argument and the program should exit.
102 virtual bool handleOccurance(const char *ArgName, const std::string &Arg) = 0;
104 virtual enum NumOccurances getNumOccurancesFlagDefault() const {
107 virtual enum ValueExpected getValueExpectedFlagDefault() const {
108 return ValueOptional;
110 virtual enum OptionHidden getOptionHiddenFlagDefault() const {
113 virtual enum FormattingFlags getFormattingFlagDefault() const {
114 return NormalFormatting;
117 int NumOccurances; // The number of times specified
118 int Flags; // Flags for the argument
120 const char *ArgStr; // The argument string itself (ex: "help", "o")
121 const char *HelpStr; // The descriptive text message for --help
122 const char *ValueStr; // String describing what the value of this option is
124 inline enum NumOccurances getNumOccurancesFlag() const {
125 int NO = Flags & OccurancesMask;
126 return NO ? (enum NumOccurances)NO : getNumOccurancesFlagDefault();
128 inline enum ValueExpected getValueExpectedFlag() const {
129 int VE = Flags & ValueMask;
130 return VE ? (enum ValueExpected)VE : getValueExpectedFlagDefault();
132 inline enum OptionHidden getOptionHiddenFlag() const {
133 int OH = Flags & HiddenMask;
134 return OH ? (enum OptionHidden)OH : getOptionHiddenFlagDefault();
136 inline enum FormattingFlags getFormattingFlag() const {
137 int OH = Flags & FormattingMask;
138 return OH ? (enum FormattingFlags)OH : getFormattingFlagDefault();
141 // hasArgStr - Return true if the argstr != ""
142 bool hasArgStr() const { return ArgStr[0] != 0; }
144 //-------------------------------------------------------------------------===
145 // Accessor functions set by OptionModifiers
147 void setArgStr(const char *S) { ArgStr = S; }
148 void setDescription(const char *S) { HelpStr = S; }
149 void setValueStr(const char *S) { ValueStr = S; }
151 void setFlag(unsigned Flag, unsigned FlagMask) {
152 if (Flags & FlagMask) {
153 error(": Specified two settings for the same option!");
160 void setNumOccurancesFlag(enum NumOccurances Val) {
161 setFlag(Val, OccurancesMask);
163 void setValueExpectedFlag(enum ValueExpected Val) { setFlag(Val, ValueMask); }
164 void setHiddenFlag(enum OptionHidden Val) { setFlag(Val, HiddenMask); }
165 void setFormattingFlag(enum FormattingFlags V) { setFlag(V, FormattingMask); }
168 Option() : NumOccurances(0), Flags(0),
169 ArgStr(""), HelpStr(""), ValueStr("") {}
172 // addArgument - Tell the system that this Option subclass will handle all
173 // occurances of -ArgStr on the command line.
175 void addArgument(const char *ArgStr);
177 // Return the width of the option tag for printing...
178 virtual unsigned getOptionWidth() const = 0;
180 // printOptionInfo - Print out information about this option. The
181 // to-be-maintained width is specified.
183 virtual void printOptionInfo(unsigned GlobalWidth) const = 0;
185 // addOccurance - Wrapper around handleOccurance that enforces Flags
187 bool addOccurance(const char *ArgName, const std::string &Value);
189 // Prints option name followed by message. Always returns true.
190 bool error(std::string Message, const char *ArgName = 0);
193 inline int getNumOccurances() const { return NumOccurances; }
198 //===----------------------------------------------------------------------===//
199 // Command line option modifiers that can be used to modify the behavior of
200 // command line option parsers...
203 // desc - Modifier to set the description shown in the --help output...
206 desc(const char *Str) : Desc(Str) {}
207 void apply(Option &O) const { O.setDescription(Desc); }
210 // value_desc - Modifier to set the value description shown in the --help
214 value_desc(const char *Str) : Desc(Str) {}
215 void apply(Option &O) const { O.setValueStr(Desc); }
219 // init - Specify a default (initial) value for the command line argument, if
220 // the default constructor for the argument type does not give you what you
221 // want. This is only valid on "opt" arguments, not on "list" arguments.
226 initializer(const Ty &Val) : Init(Val) {}
229 void apply(Opt &O) const { O.setInitialValue(Init); }
233 initializer<Ty> init(const Ty &Val) {
234 return initializer<Ty>(Val);
238 // location - Allow the user to specify which external variable they want to
239 // store the results of the command line argument processing into, if they don't
240 // want to store it in the option itself.
243 struct LocationClass {
245 LocationClass(Ty &L) : Loc(L) {}
248 void apply(Opt &O) const { O.setLocation(O, Loc); }
252 LocationClass<Ty> location(Ty &L) { return LocationClass<Ty>(L); }
255 //===----------------------------------------------------------------------===//
256 // Enum valued command line option
258 #define clEnumVal(ENUMVAL, DESC) #ENUMVAL, ENUMVAL, DESC
259 #define clEnumValN(ENUMVAL, FLAGNAME, DESC) FLAGNAME, ENUMVAL, DESC
261 // values - For custom data types, allow specifying a group of values together
262 // as the values that go into the mapping that the option handler uses. Note
263 // that the values list must always have a 0 at the end of the list to indicate
264 // that the list has ended.
266 template<class DataType>
268 // Use a vector instead of a map, because the lists should be short,
269 // the overhead is less, and most importantly, it keeps them in the order
270 // inserted so we can print our option out nicely.
271 std::vector<std::pair<const char *, std::pair<int, const char *> > > Values;
272 void processValues(va_list Vals);
274 ValuesClass(const char *EnumName, DataType Val, const char *Desc,
276 // Insert the first value, which is required.
277 Values.push_back(std::make_pair(EnumName, std::make_pair(Val, Desc)));
279 // Process the varargs portion of the values...
280 while (const char *EnumName = va_arg(ValueArgs, const char *)) {
281 DataType EnumVal = va_arg(ValueArgs, DataType);
282 const char *EnumDesc = va_arg(ValueArgs, const char *);
283 Values.push_back(std::make_pair(EnumName, // Add value to value map
284 std::make_pair(EnumVal, EnumDesc)));
289 void apply(Opt &O) const {
290 for (unsigned i = 0, e = Values.size(); i != e; ++i)
291 O.getParser().addLiteralOption(Values[i].first, Values[i].second.first,
292 Values[i].second.second);
296 template<class DataType>
297 ValuesClass<DataType> values(const char *Arg, DataType Val, const char *Desc,
300 va_start(ValueArgs, Desc);
301 ValuesClass<DataType> Vals(Arg, Val, Desc, ValueArgs);
307 //===----------------------------------------------------------------------===//
308 // parser class - Parameterizable parser for different data types. By default,
309 // known data types (string, int, bool) have specialized parsers, that do what
310 // you would expect. The default parser, used for data types that are not
311 // built-in, uses a mapping table to map specific options to values, which is
312 // used, among other things, to handle enum types.
314 //--------------------------------------------------
315 // generic_parser_base - This class holds all the non-generic code that we do
316 // not need replicated for every instance of the generic parser. This also
317 // allows us to put stuff into CommandLine.cpp
319 struct generic_parser_base {
320 virtual ~generic_parser_base() {} // Base class should have virtual-dtor
322 // getNumOptions - Virtual function implemented by generic subclass to
323 // indicate how many entries are in Values.
325 virtual unsigned getNumOptions() const = 0;
327 // getOption - Return option name N.
328 virtual const char *getOption(unsigned N) const = 0;
330 // getDescription - Return description N
331 virtual const char *getDescription(unsigned N) const = 0;
333 // Return the width of the option tag for printing...
334 virtual unsigned getOptionWidth(const Option &O) const;
336 // printOptionInfo - Print out information about this option. The
337 // to-be-maintained width is specified.
339 virtual void printOptionInfo(const Option &O, unsigned GlobalWidth) const;
341 void initialize(Option &O) {
342 // All of the modifiers for the option have been processed by now, so the
343 // argstr field should be stable, copy it down now.
345 hasArgStr = O.hasArgStr();
347 // If there has been no argstr specified, that means that we need to add an
348 // argument for every possible option. This ensures that our options are
352 for (unsigned i = 0, e = getNumOptions(); i != e; ++i)
353 O.addArgument(getOption(i));
356 enum ValueExpected getValueExpectedFlagDefault() const {
357 // If there is an ArgStr specified, then we are of the form:
359 // -opt=O2 or -opt O2 or -optO2
361 // In which case, the value is required. Otherwise if an arg str has not
362 // been specified, we are of the form:
364 // -O2 or O2 or -la (where -l and -a are seperate options)
366 // If this is the case, we cannot allow a value.
369 return ValueRequired;
371 return ValueDisallowed;
378 // Default parser implementation - This implementation depends on having a
379 // mapping of recognized options to values of some sort. In addition to this,
380 // each entry in the mapping also tracks a help message that is printed with the
381 // command line option for --help. Because this is a simple mapping parser, the
382 // data type can be any unsupported type.
384 template <class DataType>
385 class parser : public generic_parser_base {
386 std::vector<std::pair<const char *,
387 std::pair<DataType, const char *> > > Values;
389 // Implement virtual functions needed by generic_parser_base
390 unsigned getNumOptions() const { return Values.size(); }
391 const char *getOption(unsigned N) const { return Values[N].first; }
392 const char *getDescription(unsigned N) const {
393 return Values[N].second.second;
397 // Default implementation, requires user to populate it with values somehow.
398 template<class Opt> // parse - Return true on error.
399 bool parse(Opt &O, const char *ArgName, const string &Arg) {
406 for (unsigned i = 0, e = Values.size(); i != e; ++i)
407 if (ArgVal == Values[i].first) {
408 O.addValue(Values[i].second.first);
412 return O.error(": Cannot find option named '" + ArgVal + "'!");
415 // addLiteralOption - Add an entry to the mapping table...
417 void addLiteralOption(const char *Name, const DT &V, const char *HelpStr) {
418 Values.push_back(std::make_pair(Name, std::make_pair((DataType)V,HelpStr)));
423 //--------------------------------------------------
428 static bool parseImpl(Option &O, const string &Arg, bool &Val);
431 template<class Opt> // parse - Return true on error.
432 bool parse(Opt &O, const char *ArgName, const string &Arg) {
434 bool Error = parseImpl(O, Arg, Val);
435 if (!Error) O.addValue(Val);
439 enum ValueExpected getValueExpectedFlagDefault() const {
440 return ValueOptional;
443 void initialize(Option &O) {}
445 // Return the width of the option tag for printing...
446 virtual unsigned getOptionWidth(const Option &O) const;
448 // printOptionInfo - Print out information about this option. The
449 // to-be-maintained width is specified.
451 virtual void printOptionInfo(const Option &O, unsigned GlobalWidth) const;
455 //--------------------------------------------------
460 static bool parseImpl(Option &O, const string &Arg, int &Val);
463 // parse - Return true on error.
465 bool parse(Opt &O, const char *ArgName, const string &Arg) {
467 bool Error = parseImpl(O, Arg, Val);
468 if (!Error) O.addValue(Val);
472 enum ValueExpected getValueExpectedFlagDefault() const {
473 return ValueRequired;
476 void initialize(Option &O) {}
478 // Return the width of the option tag for printing...
479 virtual unsigned getOptionWidth(const Option &O) const;
481 // printOptionInfo - Print out information about this option. The
482 // to-be-maintained width is specified.
484 virtual void printOptionInfo(const Option &O, unsigned GlobalWidth) const;
488 //--------------------------------------------------
492 class parser<double> {
493 static bool parseImpl(Option &O, const string &Arg, double &Val);
496 // parse - Return true on error.
498 bool parse(Opt &O, const char *ArgName, const string &Arg) {
500 bool Error = parseImpl(O, Arg, Val);
501 if (!Error) O.addValue(Val);
505 enum ValueExpected getValueExpectedFlagDefault() const {
506 return ValueRequired;
509 void initialize(Option &O) {}
511 // Return the width of the option tag for printing...
512 virtual unsigned getOptionWidth(const Option &O) const;
514 // printOptionInfo - Print out information about this option. The
515 // to-be-maintained width is specified.
517 virtual void printOptionInfo(const Option &O, unsigned GlobalWidth) const;
520 // Parser<float> is the same as parser<double>
521 template<> struct parser<float> : public parser<double> {};
525 //--------------------------------------------------
529 struct parser<string> {
530 // parse - Return true on error.
532 bool parse(Opt &O, const char *ArgName, const string &Arg) {
536 enum ValueExpected getValueExpectedFlagDefault() const {
537 return ValueRequired;
540 void initialize(Option &O) {}
542 // Return the width of the option tag for printing...
543 virtual unsigned getOptionWidth(const Option &O) const;
545 // printOptionInfo - Print out information about this option. The
546 // to-be-maintained width is specified.
548 virtual void printOptionInfo(const Option &O, unsigned GlobalWidth) const;
553 //===----------------------------------------------------------------------===//
554 // applicator class - This class is used because we must use partial
555 // specialization to handle literal string arguments specially (const char* does
556 // not correctly respond to the apply method). Because the syntax to use this
557 // is a pain, we have the 'apply' method below to handle the nastiness...
559 template<class Mod> struct applicator {
561 static void opt(const Mod &M, Opt &O) { M.apply(O); }
564 // Handle const char* as a special case...
565 template<unsigned n> struct applicator<char[n]> {
567 static void opt(const char *Str, Opt &O) { O.setArgStr(Str); }
569 template<> struct applicator<const char*> {
571 static void opt(const char *Str, Opt &O) { O.setArgStr(Str); }
574 template<> struct applicator<NumOccurances> {
575 static void opt(NumOccurances NO, Option &O) { O.setNumOccurancesFlag(NO); }
577 template<> struct applicator<ValueExpected> {
578 static void opt(ValueExpected VE, Option &O) { O.setValueExpectedFlag(VE); }
580 template<> struct applicator<OptionHidden> {
581 static void opt(OptionHidden OH, Option &O) { O.setHiddenFlag(OH); }
583 template<> struct applicator<FormattingFlags> {
584 static void opt(FormattingFlags FF, Option &O) { O.setFormattingFlag(FF); }
587 // apply method - Apply a modifier to an option in a type safe way.
588 template<class Mod, class Opt>
589 void apply(const Mod &M, Opt *O) {
590 applicator<Mod>::opt(M, *O);
594 //===----------------------------------------------------------------------===//
597 // Default storage class definition: external storage. This implementation
598 // assumes the user will specify a variable to store the data into with the
599 // cl::location(x) modifier.
601 template<class DataType, bool ExternalStorage, bool isClass>
603 DataType *Location; // Where to store the object...
606 assert(Location != 0 && "cl::location(...) not specified for a command "
607 "line option with external storage!");
610 opt_storage() : Location(0) {}
612 bool setLocation(Option &O, DataType &L) {
614 return O.error(": cl::location(x) specified more than once!");
620 void setValue(const T &V) {
625 DataType &getValue() { check(); return *Location; }
626 const DataType &getValue() const { check(); return *Location; }
630 // Define how to hold a class type object, such as a string. Since we can
631 // inherit from a class, we do so. This makes us exactly compatible with the
632 // object in all cases that it is used.
634 template<class DataType>
635 struct opt_storage<DataType,false,true> : public DataType {
638 void setValue(const T &V) { DataType::operator=(V); }
640 DataType &getValue() { return *this; }
641 const DataType &getValue() const { return *this; }
644 // Define a partial specialization to handle things we cannot inherit from. In
645 // this case, we store an instance through containment, and overload operators
646 // to get at the value.
648 template<class DataType>
649 struct opt_storage<DataType, false, false> {
652 // Make sure we initialize the value with the default constructor for the
654 opt_storage() : Value(DataType()) {}
657 void setValue(const T &V) { Value = V; }
658 DataType &getValue() { return Value; }
659 DataType getValue() const { return Value; }
663 //===----------------------------------------------------------------------===//
664 // opt - A scalar command line option.
666 template <class DataType, bool ExternalStorage = false,
667 class ParserClass = parser<DataType> >
668 class opt : public Option,
669 public opt_storage<DataType, ExternalStorage,
670 ::boost::is_class<DataType>::value>{
673 virtual bool handleOccurance(const char *ArgName, const std::string &Arg) {
674 return Parser.parse(*this, ArgName, Arg);
677 virtual enum ValueExpected getValueExpectedFlagDefault() const {
678 return Parser.getValueExpectedFlagDefault();
681 // Forward printing stuff to the parser...
682 virtual unsigned getOptionWidth() const {return Parser.getOptionWidth(*this);}
683 virtual void printOptionInfo(unsigned GlobalWidth) const {
684 Parser.printOptionInfo(*this, GlobalWidth);
689 Parser.initialize(*this);
692 // setInitialValue - Used by the cl::init modifier...
693 void setInitialValue(const DataType &V) { setValue(V); }
695 // addValue - Used by the parser to add a value to the option
697 void addValue(const T &V) { setValue(V); }
698 ParserClass &getParser() { return Parser; }
700 operator DataType() const { return getValue(); }
703 DataType &operator=(const T &Val) { setValue(Val); return getValue(); }
713 template<class M0t, class M1t>
714 opt(const M0t &M0, const M1t &M1) {
715 apply(M0, this); apply(M1, this);
720 template<class M0t, class M1t, class M2t>
721 opt(const M0t &M0, const M1t &M1, const M2t &M2) {
722 apply(M0, this); apply(M1, this); apply(M2, this);
726 template<class M0t, class M1t, class M2t, class M3t>
727 opt(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3) {
728 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
732 template<class M0t, class M1t, class M2t, class M3t, class M4t>
733 opt(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3,
735 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
740 template<class M0t, class M1t, class M2t, class M3t,
741 class M4t, class M5t>
742 opt(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3,
743 const M4t &M4, const M5t &M5) {
744 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
745 apply(M4, this); apply(M5, this);
749 template<class M0t, class M1t, class M2t, class M3t,
750 class M4t, class M5t, class M6t>
751 opt(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3,
752 const M4t &M4, const M5t &M5, const M6t &M6) {
753 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
754 apply(M4, this); apply(M5, this); apply(M6, this);
758 template<class M0t, class M1t, class M2t, class M3t,
759 class M4t, class M5t, class M6t, class M7t>
760 opt(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3,
761 const M4t &M4, const M5t &M5, const M6t &M6, const M7t &M7) {
762 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
763 apply(M4, this); apply(M5, this); apply(M6, this); apply(M7, this);
768 //===----------------------------------------------------------------------===//
769 // list_storage class
771 // Default storage class definition: external storage. This implementation
772 // assumes the user will specify a variable to store the data into with the
773 // cl::location(x) modifier.
775 template<class DataType, class StorageClass>
777 StorageClass *Location; // Where to store the object...
780 list_storage() : Location(0) {}
782 bool setLocation(Option &O, StorageClass &L) {
784 return O.error(": cl::location(x) specified more than once!");
790 void addValue(const T &V) {
791 assert(Location != 0 && "cl::location(...) not specified for a command "
792 "line option with external storage!");
793 Location->push_back(V);
798 // Define how to hold a class type object, such as a string. Since we can
799 // inherit from a class, we do so. This makes us exactly compatible with the
800 // object in all cases that it is used.
802 template<class DataType>
803 struct list_storage<DataType, bool> : public std::vector<DataType> {
806 void addValue(const T &V) { push_back(V); }
810 //===----------------------------------------------------------------------===//
811 // list - A list of command line options.
813 template <class DataType, class Storage = bool,
814 class ParserClass = parser<DataType> >
815 class list : public Option, public list_storage<DataType, Storage> {
818 virtual enum NumOccurances getNumOccurancesFlagDefault() const {
821 virtual enum ValueExpected getValueExpectedFlagDefault() const {
822 return Parser.getValueExpectedFlagDefault();
825 virtual bool handleOccurance(const char *ArgName, const std::string &Arg) {
826 return Parser.parse(*this, ArgName, Arg);
829 // Forward printing stuff to the parser...
830 virtual unsigned getOptionWidth() const {return Parser.getOptionWidth(*this);}
831 virtual void printOptionInfo(unsigned GlobalWidth) const {
832 Parser.printOptionInfo(*this, GlobalWidth);
837 Parser.initialize(*this);
840 ParserClass &getParser() { return Parser; }
844 list(const M0t &M0) {
849 template<class M0t, class M1t>
850 list(const M0t &M0, const M1t &M1) {
851 apply(M0, this); apply(M1, this);
855 template<class M0t, class M1t, class M2t>
856 list(const M0t &M0, const M1t &M1, const M2t &M2) {
857 apply(M0, this); apply(M1, this); apply(M2, this);
861 template<class M0t, class M1t, class M2t, class M3t>
862 list(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3) {
863 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
867 template<class M0t, class M1t, class M2t, class M3t, class M4t>
868 list(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3,
870 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
875 template<class M0t, class M1t, class M2t, class M3t,
876 class M4t, class M5t>
877 list(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3,
878 const M4t &M4, const M5t &M5) {
879 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
880 apply(M4, this); apply(M5, this);
884 template<class M0t, class M1t, class M2t, class M3t,
885 class M4t, class M5t, class M6t>
886 list(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3,
887 const M4t &M4, const M5t &M5, const M6t &M6) {
888 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
889 apply(M4, this); apply(M5, this); apply(M6, this);
893 template<class M0t, class M1t, class M2t, class M3t,
894 class M4t, class M5t, class M6t, class M7t>
895 list(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3,
896 const M4t &M4, const M5t &M5, const M6t &M6, const M7t &M7) {
897 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
898 apply(M4, this); apply(M5, this); apply(M6, this); apply(M7, this);
905 //===----------------------------------------------------------------------===//
906 // Aliased command line option (alias this name to a preexisting name)
909 class alias : public Option {
911 virtual bool handleOccurance(const char *ArgName, const std::string &Arg) {
912 return AliasFor->handleOccurance(AliasFor->ArgStr, Arg);
914 // Aliases default to be hidden...
915 virtual enum OptionHidden getOptionHiddenFlagDefault() const {return Hidden;}
917 // Handle printing stuff...
918 virtual unsigned getOptionWidth() const;
919 virtual void printOptionInfo(unsigned GlobalWidth) const;
923 error(": cl::alias must have argument name specified!");
925 error(": cl::alias must have an cl::aliasopt(option) specified!");
929 void setAliasFor(Option &O) {
931 error(": cl::alias must only have one cl::aliasopt(...) specified!");
937 alias(const M0t &M0) : AliasFor(0) {
942 template<class M0t, class M1t>
943 alias(const M0t &M0, const M1t &M1) : AliasFor(0) {
944 apply(M0, this); apply(M1, this);
948 template<class M0t, class M1t, class M2t>
949 alias(const M0t &M0, const M1t &M1, const M2t &M2) : AliasFor(0) {
950 apply(M0, this); apply(M1, this); apply(M2, this);
954 template<class M0t, class M1t, class M2t, class M3t>
955 alias(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3)
957 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
962 // aliasfor - Modifier to set the option an alias aliases.
965 aliasopt(Option &O) : Opt(O) {}
966 void apply(alias &A) const { A.setAliasFor(Opt); }
969 } // End namespace cl