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);
176 void removeArgument(const char *ArgStr);
178 // Return the width of the option tag for printing...
179 virtual unsigned getOptionWidth() const = 0;
181 // printOptionInfo - Print out information about this option. The
182 // to-be-maintained width is specified.
184 virtual void printOptionInfo(unsigned GlobalWidth) const = 0;
186 // addOccurance - Wrapper around handleOccurance that enforces Flags
188 bool addOccurance(const char *ArgName, const std::string &Value);
190 // Prints option name followed by message. Always returns true.
191 bool error(std::string Message, const char *ArgName = 0);
194 inline int getNumOccurances() const { return NumOccurances; }
199 //===----------------------------------------------------------------------===//
200 // Command line option modifiers that can be used to modify the behavior of
201 // command line option parsers...
204 // desc - Modifier to set the description shown in the --help output...
207 desc(const char *Str) : Desc(Str) {}
208 void apply(Option &O) const { O.setDescription(Desc); }
211 // value_desc - Modifier to set the value description shown in the --help
215 value_desc(const char *Str) : Desc(Str) {}
216 void apply(Option &O) const { O.setValueStr(Desc); }
220 // init - Specify a default (initial) value for the command line argument, if
221 // the default constructor for the argument type does not give you what you
222 // want. This is only valid on "opt" arguments, not on "list" arguments.
227 initializer(const Ty &Val) : Init(Val) {}
230 void apply(Opt &O) const { O.setInitialValue(Init); }
234 initializer<Ty> init(const Ty &Val) {
235 return initializer<Ty>(Val);
239 // location - Allow the user to specify which external variable they want to
240 // store the results of the command line argument processing into, if they don't
241 // want to store it in the option itself.
244 struct LocationClass {
246 LocationClass(Ty &L) : Loc(L) {}
249 void apply(Opt &O) const { O.setLocation(O, Loc); }
253 LocationClass<Ty> location(Ty &L) { return LocationClass<Ty>(L); }
256 //===----------------------------------------------------------------------===//
257 // Enum valued command line option
259 #define clEnumVal(ENUMVAL, DESC) #ENUMVAL, (int)ENUMVAL, DESC
260 #define clEnumValN(ENUMVAL, FLAGNAME, DESC) FLAGNAME, (int)ENUMVAL, DESC
262 // values - For custom data types, allow specifying a group of values together
263 // as the values that go into the mapping that the option handler uses. Note
264 // that the values list must always have a 0 at the end of the list to indicate
265 // that the list has ended.
267 template<class DataType>
269 // Use a vector instead of a map, because the lists should be short,
270 // the overhead is less, and most importantly, it keeps them in the order
271 // inserted so we can print our option out nicely.
272 std::vector<std::pair<const char *, std::pair<int, const char *> > > Values;
273 void processValues(va_list Vals);
275 ValuesClass(const char *EnumName, DataType Val, const char *Desc,
277 // Insert the first value, which is required.
278 Values.push_back(std::make_pair(EnumName, std::make_pair(Val, Desc)));
280 // Process the varargs portion of the values...
281 while (const char *EnumName = va_arg(ValueArgs, const char *)) {
282 DataType EnumVal = (DataType)va_arg(ValueArgs, int);
283 const char *EnumDesc = va_arg(ValueArgs, const char *);
284 Values.push_back(std::make_pair(EnumName, // Add value to value map
285 std::make_pair(EnumVal, EnumDesc)));
290 void apply(Opt &O) const {
291 for (unsigned i = 0, e = Values.size(); i != e; ++i)
292 O.getParser().addLiteralOption(Values[i].first, Values[i].second.first,
293 Values[i].second.second);
297 template<class DataType>
298 ValuesClass<DataType> values(const char *Arg, DataType Val, const char *Desc,
301 va_start(ValueArgs, Desc);
302 ValuesClass<DataType> Vals(Arg, Val, Desc, ValueArgs);
308 //===----------------------------------------------------------------------===//
309 // parser class - Parameterizable parser for different data types. By default,
310 // known data types (string, int, bool) have specialized parsers, that do what
311 // you would expect. The default parser, used for data types that are not
312 // built-in, uses a mapping table to map specific options to values, which is
313 // used, among other things, to handle enum types.
315 //--------------------------------------------------
316 // generic_parser_base - This class holds all the non-generic code that we do
317 // not need replicated for every instance of the generic parser. This also
318 // allows us to put stuff into CommandLine.cpp
320 struct generic_parser_base {
321 virtual ~generic_parser_base() {} // Base class should have virtual-dtor
323 // getNumOptions - Virtual function implemented by generic subclass to
324 // indicate how many entries are in Values.
326 virtual unsigned getNumOptions() const = 0;
328 // getOption - Return option name N.
329 virtual const char *getOption(unsigned N) const = 0;
331 // getDescription - Return description N
332 virtual const char *getDescription(unsigned N) const = 0;
334 // Return the width of the option tag for printing...
335 virtual unsigned getOptionWidth(const Option &O) const;
337 // printOptionInfo - Print out information about this option. The
338 // to-be-maintained width is specified.
340 virtual void printOptionInfo(const Option &O, unsigned GlobalWidth) const;
342 void initialize(Option &O) {
343 // All of the modifiers for the option have been processed by now, so the
344 // argstr field should be stable, copy it down now.
346 hasArgStr = O.hasArgStr();
348 // If there has been no argstr specified, that means that we need to add an
349 // argument for every possible option. This ensures that our options are
353 for (unsigned i = 0, e = getNumOptions(); i != e; ++i)
354 O.addArgument(getOption(i));
357 enum ValueExpected getValueExpectedFlagDefault() const {
358 // If there is an ArgStr specified, then we are of the form:
360 // -opt=O2 or -opt O2 or -optO2
362 // In which case, the value is required. Otherwise if an arg str has not
363 // been specified, we are of the form:
365 // -O2 or O2 or -la (where -l and -a are seperate options)
367 // If this is the case, we cannot allow a value.
370 return ValueRequired;
372 return ValueDisallowed;
375 // findOption - Return the option number corresponding to the specified
376 // argument string. If the option is not found, getNumOptions() is returned.
378 unsigned findOption(const char *Name);
384 // Default parser implementation - This implementation depends on having a
385 // mapping of recognized options to values of some sort. In addition to this,
386 // each entry in the mapping also tracks a help message that is printed with the
387 // command line option for --help. Because this is a simple mapping parser, the
388 // data type can be any unsupported type.
390 template <class DataType>
391 class parser : public generic_parser_base {
393 std::vector<std::pair<const char *,
394 std::pair<DataType, const char *> > > Values;
397 // Implement virtual functions needed by generic_parser_base
398 unsigned getNumOptions() const { return Values.size(); }
399 const char *getOption(unsigned N) const { return Values[N].first; }
400 const char *getDescription(unsigned N) const {
401 return Values[N].second.second;
404 // Default implementation, requires user to populate it with values somehow.
405 template<class Opt> // parse - Return true on error.
406 bool parse(Opt &O, const char *ArgName, const std::string &Arg) {
413 for (unsigned i = 0, e = Values.size(); i != e; ++i)
414 if (ArgVal == Values[i].first) {
415 O.addValue(Values[i].second.first);
419 return O.error(": Cannot find option named '" + ArgVal + "'!");
422 // addLiteralOption - Add an entry to the mapping table...
424 void addLiteralOption(const char *Name, const DT &V, const char *HelpStr) {
425 assert(findOption(Name) == Values.size() && "Option already exists!");
426 Values.push_back(std::make_pair(Name, std::make_pair((DataType)V,HelpStr)));
429 // removeLiteralOption - Remove the specified option.
431 void removeLiteralOption(const char *Name) {
432 unsigned N = findOption(Name);
433 assert(N != Values.size() && "Option not found!");
434 Values.erase(Values.begin()+N);
439 //--------------------------------------------------
444 static bool parseImpl(Option &O, const std::string &Arg, bool &Val);
447 template<class Opt> // parse - Return true on error.
448 bool parse(Opt &O, const char *ArgName, const std::string &Arg) {
450 bool Error = parseImpl(O, Arg, Val);
451 if (!Error) O.addValue(Val);
455 enum ValueExpected getValueExpectedFlagDefault() const {
456 return ValueOptional;
459 void initialize(Option &O) {}
461 // Return the width of the option tag for printing...
462 virtual unsigned getOptionWidth(const Option &O) const;
464 // printOptionInfo - Print out information about this option. The
465 // to-be-maintained width is specified.
467 virtual void printOptionInfo(const Option &O, unsigned GlobalWidth) const;
471 //--------------------------------------------------
476 static bool parseImpl(Option &O, const std::string &Arg, int &Val);
479 // parse - Return true on error.
481 bool parse(Opt &O, const char *ArgName, const std::string &Arg) {
483 bool Error = parseImpl(O, Arg, Val);
484 if (!Error) O.addValue(Val);
488 enum ValueExpected getValueExpectedFlagDefault() const {
489 return ValueRequired;
492 void initialize(Option &O) {}
494 // Return the width of the option tag for printing...
495 virtual unsigned getOptionWidth(const Option &O) const;
497 // printOptionInfo - Print out information about this option. The
498 // to-be-maintained width is specified.
500 virtual void printOptionInfo(const Option &O, unsigned GlobalWidth) const;
504 //--------------------------------------------------
508 class parser<double> {
509 static bool parseImpl(Option &O, const std::string &Arg, double &Val);
512 // parse - Return true on error.
514 bool parse(Opt &O, const char *ArgName, const std::string &Arg) {
516 bool Error = parseImpl(O, Arg, Val);
517 if (!Error) O.addValue(Val);
521 enum ValueExpected getValueExpectedFlagDefault() const {
522 return ValueRequired;
525 void initialize(Option &O) {}
527 // Return the width of the option tag for printing...
528 virtual unsigned getOptionWidth(const Option &O) const;
530 // printOptionInfo - Print out information about this option. The
531 // to-be-maintained width is specified.
533 virtual void printOptionInfo(const Option &O, unsigned GlobalWidth) const;
536 // Parser<float> is the same as parser<double>
537 template<> struct parser<float> : public parser<double> {};
541 //--------------------------------------------------
542 // parser<std::string>
545 struct parser<std::string> {
546 // parse - Return true on error.
548 bool parse(Opt &O, const char *ArgName, const std::string &Arg) {
552 enum ValueExpected getValueExpectedFlagDefault() const {
553 return ValueRequired;
556 void initialize(Option &O) {}
558 // Return the width of the option tag for printing...
559 virtual unsigned getOptionWidth(const Option &O) const;
561 // printOptionInfo - Print out information about this option. The
562 // to-be-maintained width is specified.
564 virtual void printOptionInfo(const Option &O, unsigned GlobalWidth) const;
569 //===----------------------------------------------------------------------===//
570 // applicator class - This class is used because we must use partial
571 // specialization to handle literal string arguments specially (const char* does
572 // not correctly respond to the apply method). Because the syntax to use this
573 // is a pain, we have the 'apply' method below to handle the nastiness...
575 template<class Mod> struct applicator {
577 static void opt(const Mod &M, Opt &O) { M.apply(O); }
580 // Handle const char* as a special case...
581 template<unsigned n> struct applicator<char[n]> {
583 static void opt(const char *Str, Opt &O) { O.setArgStr(Str); }
585 template<> struct applicator<const char*> {
587 static void opt(const char *Str, Opt &O) { O.setArgStr(Str); }
590 template<> struct applicator<NumOccurances> {
591 static void opt(NumOccurances NO, Option &O) { O.setNumOccurancesFlag(NO); }
593 template<> struct applicator<ValueExpected> {
594 static void opt(ValueExpected VE, Option &O) { O.setValueExpectedFlag(VE); }
596 template<> struct applicator<OptionHidden> {
597 static void opt(OptionHidden OH, Option &O) { O.setHiddenFlag(OH); }
599 template<> struct applicator<FormattingFlags> {
600 static void opt(FormattingFlags FF, Option &O) { O.setFormattingFlag(FF); }
603 // apply method - Apply a modifier to an option in a type safe way.
604 template<class Mod, class Opt>
605 void apply(const Mod &M, Opt *O) {
606 applicator<Mod>::opt(M, *O);
610 //===----------------------------------------------------------------------===//
613 // Default storage class definition: external storage. This implementation
614 // assumes the user will specify a variable to store the data into with the
615 // cl::location(x) modifier.
617 template<class DataType, bool ExternalStorage, bool isClass>
619 DataType *Location; // Where to store the object...
622 assert(Location != 0 && "cl::location(...) not specified for a command "
623 "line option with external storage!");
626 opt_storage() : Location(0) {}
628 bool setLocation(Option &O, DataType &L) {
630 return O.error(": cl::location(x) specified more than once!");
636 void setValue(const T &V) {
641 DataType &getValue() { check(); return *Location; }
642 const DataType &getValue() const { check(); return *Location; }
646 // Define how to hold a class type object, such as a string. Since we can
647 // inherit from a class, we do so. This makes us exactly compatible with the
648 // object in all cases that it is used.
650 template<class DataType>
651 struct opt_storage<DataType,false,true> : public DataType {
654 void setValue(const T &V) { DataType::operator=(V); }
656 DataType &getValue() { return *this; }
657 const DataType &getValue() const { return *this; }
660 // Define a partial specialization to handle things we cannot inherit from. In
661 // this case, we store an instance through containment, and overload operators
662 // to get at the value.
664 template<class DataType>
665 struct opt_storage<DataType, false, false> {
668 // Make sure we initialize the value with the default constructor for the
670 opt_storage() : Value(DataType()) {}
673 void setValue(const T &V) { Value = V; }
674 DataType &getValue() { return Value; }
675 DataType getValue() const { return Value; }
679 //===----------------------------------------------------------------------===//
680 // opt - A scalar command line option.
682 template <class DataType, bool ExternalStorage = false,
683 class ParserClass = parser<DataType> >
684 class opt : public Option,
685 public opt_storage<DataType, ExternalStorage,
686 ::boost::is_class<DataType>::value>{
689 virtual bool handleOccurance(const char *ArgName, const std::string &Arg) {
690 return Parser.parse(*this, ArgName, Arg);
693 virtual enum ValueExpected getValueExpectedFlagDefault() const {
694 return Parser.getValueExpectedFlagDefault();
697 // Forward printing stuff to the parser...
698 virtual unsigned getOptionWidth() const {return Parser.getOptionWidth(*this);}
699 virtual void printOptionInfo(unsigned GlobalWidth) const {
700 Parser.printOptionInfo(*this, GlobalWidth);
705 Parser.initialize(*this);
708 // setInitialValue - Used by the cl::init modifier...
709 void setInitialValue(const DataType &V) { setValue(V); }
711 // addValue - Used by the parser to add a value to the option
713 void addValue(const T &V) { setValue(V); }
714 ParserClass &getParser() { return Parser; }
716 operator DataType() const { return getValue(); }
719 DataType &operator=(const T &Val) { setValue(Val); return getValue(); }
729 template<class M0t, class M1t>
730 opt(const M0t &M0, const M1t &M1) {
731 apply(M0, this); apply(M1, this);
736 template<class M0t, class M1t, class M2t>
737 opt(const M0t &M0, const M1t &M1, const M2t &M2) {
738 apply(M0, this); apply(M1, this); apply(M2, this);
742 template<class M0t, class M1t, class M2t, class M3t>
743 opt(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3) {
744 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
748 template<class M0t, class M1t, class M2t, class M3t, class M4t>
749 opt(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3,
751 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
756 template<class M0t, class M1t, class M2t, class M3t,
757 class M4t, class M5t>
758 opt(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3,
759 const M4t &M4, const M5t &M5) {
760 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
761 apply(M4, this); apply(M5, this);
765 template<class M0t, class M1t, class M2t, class M3t,
766 class M4t, class M5t, class M6t>
767 opt(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3,
768 const M4t &M4, const M5t &M5, const M6t &M6) {
769 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
770 apply(M4, this); apply(M5, this); apply(M6, this);
774 template<class M0t, class M1t, class M2t, class M3t,
775 class M4t, class M5t, class M6t, class M7t>
776 opt(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3,
777 const M4t &M4, const M5t &M5, const M6t &M6, const M7t &M7) {
778 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
779 apply(M4, this); apply(M5, this); apply(M6, this); apply(M7, this);
784 //===----------------------------------------------------------------------===//
785 // list_storage class
787 // Default storage class definition: external storage. This implementation
788 // assumes the user will specify a variable to store the data into with the
789 // cl::location(x) modifier.
791 template<class DataType, class StorageClass>
793 StorageClass *Location; // Where to store the object...
796 list_storage() : Location(0) {}
798 bool setLocation(Option &O, StorageClass &L) {
800 return O.error(": cl::location(x) specified more than once!");
806 void addValue(const T &V) {
807 assert(Location != 0 && "cl::location(...) not specified for a command "
808 "line option with external storage!");
809 Location->push_back(V);
814 // Define how to hold a class type object, such as a string. Since we can
815 // inherit from a class, we do so. This makes us exactly compatible with the
816 // object in all cases that it is used.
818 template<class DataType>
819 struct list_storage<DataType, bool> : public std::vector<DataType> {
822 void addValue(const T &V) { push_back(V); }
826 //===----------------------------------------------------------------------===//
827 // list - A list of command line options.
829 template <class DataType, class Storage = bool,
830 class ParserClass = parser<DataType> >
831 class list : public Option, public list_storage<DataType, Storage> {
834 virtual enum NumOccurances getNumOccurancesFlagDefault() const {
837 virtual enum ValueExpected getValueExpectedFlagDefault() const {
838 return Parser.getValueExpectedFlagDefault();
841 virtual bool handleOccurance(const char *ArgName, const std::string &Arg) {
842 return Parser.parse(*this, ArgName, Arg);
845 // Forward printing stuff to the parser...
846 virtual unsigned getOptionWidth() const {return Parser.getOptionWidth(*this);}
847 virtual void printOptionInfo(unsigned GlobalWidth) const {
848 Parser.printOptionInfo(*this, GlobalWidth);
853 Parser.initialize(*this);
856 ParserClass &getParser() { return Parser; }
860 list(const M0t &M0) {
865 template<class M0t, class M1t>
866 list(const M0t &M0, const M1t &M1) {
867 apply(M0, this); apply(M1, this);
871 template<class M0t, class M1t, class M2t>
872 list(const M0t &M0, const M1t &M1, const M2t &M2) {
873 apply(M0, this); apply(M1, this); apply(M2, this);
877 template<class M0t, class M1t, class M2t, class M3t>
878 list(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3) {
879 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
883 template<class M0t, class M1t, class M2t, class M3t, class M4t>
884 list(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3,
886 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
891 template<class M0t, class M1t, class M2t, class M3t,
892 class M4t, class M5t>
893 list(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3,
894 const M4t &M4, const M5t &M5) {
895 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
896 apply(M4, this); apply(M5, this);
900 template<class M0t, class M1t, class M2t, class M3t,
901 class M4t, class M5t, class M6t>
902 list(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3,
903 const M4t &M4, const M5t &M5, const M6t &M6) {
904 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
905 apply(M4, this); apply(M5, this); apply(M6, this);
909 template<class M0t, class M1t, class M2t, class M3t,
910 class M4t, class M5t, class M6t, class M7t>
911 list(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3,
912 const M4t &M4, const M5t &M5, const M6t &M6, const M7t &M7) {
913 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
914 apply(M4, this); apply(M5, this); apply(M6, this); apply(M7, this);
921 //===----------------------------------------------------------------------===//
922 // Aliased command line option (alias this name to a preexisting name)
925 class alias : public Option {
927 virtual bool handleOccurance(const char *ArgName, const std::string &Arg) {
928 return AliasFor->handleOccurance(AliasFor->ArgStr, Arg);
930 // Aliases default to be hidden...
931 virtual enum OptionHidden getOptionHiddenFlagDefault() const {return Hidden;}
933 // Handle printing stuff...
934 virtual unsigned getOptionWidth() const;
935 virtual void printOptionInfo(unsigned GlobalWidth) const;
939 error(": cl::alias must have argument name specified!");
941 error(": cl::alias must have an cl::aliasopt(option) specified!");
945 void setAliasFor(Option &O) {
947 error(": cl::alias must only have one cl::aliasopt(...) specified!");
953 alias(const M0t &M0) : AliasFor(0) {
958 template<class M0t, class M1t>
959 alias(const M0t &M0, const M1t &M1) : AliasFor(0) {
960 apply(M0, this); apply(M1, this);
964 template<class M0t, class M1t, class M2t>
965 alias(const M0t &M0, const M1t &M1, const M2t &M2) : AliasFor(0) {
966 apply(M0, this); apply(M1, this); apply(M2, this);
970 template<class M0t, class M1t, class M2t, class M3t>
971 alias(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3)
973 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
978 // aliasfor - Modifier to set the option an alias aliases.
981 aliasopt(Option &O) : Opt(O) {}
982 void apply(alias &A) const { A.setAliasFor(Opt); }
985 } // End namespace cl