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/DataTypes.h"
25 #include "llvm/Support/Compiler.h"
26 #include "llvm/ADT/SmallVector.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)());
63 // MarkOptionsChanged - Internal helper function.
64 void MarkOptionsChanged();
66 //===----------------------------------------------------------------------===//
67 // Flags permitted to be passed to command line arguments
70 enum NumOccurrences { // Flags for the number of occurrences allowed
71 Optional = 0x01, // Zero or One occurrence
72 ZeroOrMore = 0x02, // Zero or more occurrences allowed
73 Required = 0x03, // One occurrence required
74 OneOrMore = 0x04, // One or more occurrences required
76 // ConsumeAfter - Indicates that this option is fed anything that follows the
77 // last positional argument required by the application (it is an error if
78 // there are zero positional arguments, and a ConsumeAfter option is used).
79 // Thus, for example, all arguments to LLI are processed until a filename is
80 // found. Once a filename is found, all of the succeeding arguments are
81 // passed, unprocessed, to the ConsumeAfter option.
85 OccurrencesMask = 0x07
88 enum ValueExpected { // Is a value required for the option?
89 ValueOptional = 0x08, // The value can appear... or not
90 ValueRequired = 0x10, // The value is required to appear!
91 ValueDisallowed = 0x18, // A value may not be specified (for flags)
95 enum OptionHidden { // Control whether -help shows this option
96 NotHidden = 0x20, // Option included in --help & --help-hidden
97 Hidden = 0x40, // -help doesn't, but --help-hidden does
98 ReallyHidden = 0x60, // Neither --help nor --help-hidden show this arg
102 // Formatting flags - This controls special features that the option might have
103 // that cause it to be parsed differently...
105 // Prefix - This option allows arguments that are otherwise unrecognized to be
106 // matched by options that are a prefix of the actual value. This is useful for
107 // cases like a linker, where options are typically of the form '-lfoo' or
108 // '-L../../include' where -l or -L are the actual flags. When prefix is
109 // enabled, and used, the value for the flag comes from the suffix of the
112 // Grouping - With this option enabled, multiple letter options are allowed to
113 // bunch together with only a single hyphen for the whole group. This allows
114 // emulation of the behavior that ls uses for example: ls -la === ls -l -a
117 enum FormattingFlags {
118 NormalFormatting = 0x000, // Nothing special
119 Positional = 0x080, // Is a positional argument, no '-' required
120 Prefix = 0x100, // Can this option directly prefix its value?
121 Grouping = 0x180, // Can this option group with other options?
122 FormattingMask = 0x180 // Union of the above flags.
125 enum MiscFlags { // Miscellaneous flags to adjust argument
126 CommaSeparated = 0x200, // Should this cl::list split between commas?
127 PositionalEatsArgs = 0x400, // Should this positional cl::list eat -args?
128 Sink = 0x800, // Should this cl::list eat all unknown options?
129 MiscMask = 0xE00 // Union of the above flags.
134 //===----------------------------------------------------------------------===//
141 // handleOccurrences - Overriden by subclasses to handle the value passed into
142 // an argument. Should return true if there was an error processing the
143 // argument and the program should exit.
145 virtual bool handleOccurrence(unsigned pos, const char *ArgName,
146 const std::string &Arg) = 0;
148 virtual enum ValueExpected getValueExpectedFlagDefault() const {
149 return ValueOptional;
152 // Out of line virtual function to provide home for the class.
153 virtual void anchor();
155 int NumOccurrences; // The number of times specified
156 int Flags; // Flags for the argument
157 unsigned Position; // Position of last occurrence of the option
158 unsigned AdditionalVals;// Greater than 0 for multi-valued option.
159 Option *NextRegistered; // Singly linked list of registered options.
161 const char *ArgStr; // The argument string itself (ex: "help", "o")
162 const char *HelpStr; // The descriptive text message for --help
163 const char *ValueStr; // String describing what the value of this option is
165 inline enum NumOccurrences getNumOccurrencesFlag() const {
166 return static_cast<enum NumOccurrences>(Flags & OccurrencesMask);
168 inline enum ValueExpected getValueExpectedFlag() const {
169 int VE = Flags & ValueMask;
170 return VE ? static_cast<enum ValueExpected>(VE)
171 : getValueExpectedFlagDefault();
173 inline enum OptionHidden getOptionHiddenFlag() const {
174 return static_cast<enum OptionHidden>(Flags & HiddenMask);
176 inline enum FormattingFlags getFormattingFlag() const {
177 return static_cast<enum FormattingFlags>(Flags & FormattingMask);
179 inline unsigned getMiscFlags() const {
180 return Flags & MiscMask;
182 inline unsigned getPosition() const { return Position; }
183 inline unsigned getNumAdditionalVals() const { return AdditionalVals; }
185 // hasArgStr - Return true if the argstr != ""
186 bool hasArgStr() const { return ArgStr[0] != 0; }
188 //-------------------------------------------------------------------------===
189 // Accessor functions set by OptionModifiers
191 void setArgStr(const char *S) { ArgStr = S; }
192 void setDescription(const char *S) { HelpStr = S; }
193 void setValueStr(const char *S) { ValueStr = S; }
195 void setFlag(unsigned Flag, unsigned FlagMask) {
200 void setNumOccurrencesFlag(enum NumOccurrences Val) {
201 setFlag(Val, OccurrencesMask);
203 void setValueExpectedFlag(enum ValueExpected Val) { setFlag(Val, ValueMask); }
204 void setHiddenFlag(enum OptionHidden Val) { setFlag(Val, HiddenMask); }
205 void setFormattingFlag(enum FormattingFlags V) { setFlag(V, FormattingMask); }
206 void setMiscFlag(enum MiscFlags M) { setFlag(M, M); }
207 void setPosition(unsigned pos) { Position = pos; }
209 explicit Option(unsigned DefaultFlags)
210 : NumOccurrences(0), Flags(DefaultFlags | NormalFormatting), Position(0),
211 AdditionalVals(0), NextRegistered(0),
212 ArgStr(""), HelpStr(""), ValueStr("") {
213 assert(getNumOccurrencesFlag() != 0 &&
214 getOptionHiddenFlag() != 0 && "Not all default flags specified!");
217 inline void setNumAdditionalVals(unsigned n)
218 { AdditionalVals = n; }
220 // addArgument - Register this argument with the commandline system.
224 Option *getNextRegisteredOption() const { return NextRegistered; }
226 // Return the width of the option tag for printing...
227 virtual size_t getOptionWidth() const = 0;
229 // printOptionInfo - Print out information about this option. The
230 // to-be-maintained width is specified.
232 virtual void printOptionInfo(size_t GlobalWidth) const = 0;
234 virtual void getExtraOptionNames(std::vector<const char*> &) {}
236 // addOccurrence - Wrapper around handleOccurrence that enforces Flags
238 bool addOccurrence(unsigned pos, const char *ArgName,
239 const std::string &Value, bool MultiArg = false);
241 // Prints option name followed by message. Always returns true.
242 bool error(std::string Message, const char *ArgName = 0);
245 inline int getNumOccurrences() const { return NumOccurrences; }
250 //===----------------------------------------------------------------------===//
251 // Command line option modifiers that can be used to modify the behavior of
252 // command line option parsers...
255 // desc - Modifier to set the description shown in the --help output...
258 desc(const char *Str) : Desc(Str) {}
259 void apply(Option &O) const { O.setDescription(Desc); }
262 // value_desc - Modifier to set the value description shown in the --help
266 value_desc(const char *Str) : Desc(Str) {}
267 void apply(Option &O) const { O.setValueStr(Desc); }
270 // init - Specify a default (initial) value for the command line argument, if
271 // the default constructor for the argument type does not give you what you
272 // want. This is only valid on "opt" arguments, not on "list" arguments.
277 initializer(const Ty &Val) : Init(Val) {}
280 void apply(Opt &O) const { O.setInitialValue(Init); }
284 initializer<Ty> init(const Ty &Val) {
285 return initializer<Ty>(Val);
289 // location - Allow the user to specify which external variable they want to
290 // store the results of the command line argument processing into, if they don't
291 // want to store it in the option itself.
294 struct LocationClass {
296 LocationClass(Ty &L) : Loc(L) {}
299 void apply(Opt &O) const { O.setLocation(O, Loc); }
303 LocationClass<Ty> location(Ty &L) { return LocationClass<Ty>(L); }
306 //===----------------------------------------------------------------------===//
307 // Enum valued command line option
309 #define clEnumVal(ENUMVAL, DESC) #ENUMVAL, int(ENUMVAL), DESC
310 #define clEnumValN(ENUMVAL, FLAGNAME, DESC) FLAGNAME, int(ENUMVAL), DESC
311 #define clEnumValEnd (reinterpret_cast<void*>(0))
313 // values - For custom data types, allow specifying a group of values together
314 // as the values that go into the mapping that the option handler uses. Note
315 // that the values list must always have a 0 at the end of the list to indicate
316 // that the list has ended.
318 template<class DataType>
320 // Use a vector instead of a map, because the lists should be short,
321 // the overhead is less, and most importantly, it keeps them in the order
322 // inserted so we can print our option out nicely.
323 SmallVector<std::pair<const char *, std::pair<int, const char *> >,4> Values;
324 void processValues(va_list Vals);
326 ValuesClass(const char *EnumName, DataType Val, const char *Desc,
328 // Insert the first value, which is required.
329 Values.push_back(std::make_pair(EnumName, std::make_pair(Val, Desc)));
331 // Process the varargs portion of the values...
332 while (const char *enumName = va_arg(ValueArgs, const char *)) {
333 DataType EnumVal = static_cast<DataType>(va_arg(ValueArgs, int));
334 const char *EnumDesc = va_arg(ValueArgs, const char *);
335 Values.push_back(std::make_pair(enumName, // Add value to value map
336 std::make_pair(EnumVal, EnumDesc)));
341 void apply(Opt &O) const {
342 for (unsigned i = 0, e = static_cast<unsigned>(Values.size());
344 O.getParser().addLiteralOption(Values[i].first, Values[i].second.first,
345 Values[i].second.second);
349 template<class DataType>
350 ValuesClass<DataType> END_WITH_NULL values(const char *Arg, DataType Val,
351 const char *Desc, ...) {
353 va_start(ValueArgs, Desc);
354 ValuesClass<DataType> Vals(Arg, Val, Desc, ValueArgs);
360 //===----------------------------------------------------------------------===//
361 // parser class - Parameterizable parser for different data types. By default,
362 // known data types (string, int, bool) have specialized parsers, that do what
363 // you would expect. The default parser, used for data types that are not
364 // built-in, uses a mapping table to map specific options to values, which is
365 // used, among other things, to handle enum types.
367 //--------------------------------------------------
368 // generic_parser_base - This class holds all the non-generic code that we do
369 // not need replicated for every instance of the generic parser. This also
370 // allows us to put stuff into CommandLine.cpp
372 struct generic_parser_base {
373 virtual ~generic_parser_base() {} // Base class should have virtual-dtor
375 // getNumOptions - Virtual function implemented by generic subclass to
376 // indicate how many entries are in Values.
378 virtual unsigned getNumOptions() const = 0;
380 // getOption - Return option name N.
381 virtual const char *getOption(unsigned N) const = 0;
383 // getDescription - Return description N
384 virtual const char *getDescription(unsigned N) const = 0;
386 // Return the width of the option tag for printing...
387 virtual size_t getOptionWidth(const Option &O) const;
389 // printOptionInfo - Print out information about this option. The
390 // to-be-maintained width is specified.
392 virtual void printOptionInfo(const Option &O, size_t GlobalWidth) const;
394 void initialize(Option &O) {
395 // All of the modifiers for the option have been processed by now, so the
396 // argstr field should be stable, copy it down now.
398 hasArgStr = O.hasArgStr();
401 void getExtraOptionNames(std::vector<const char*> &OptionNames) {
402 // If there has been no argstr specified, that means that we need to add an
403 // argument for every possible option. This ensures that our options are
406 for (unsigned i = 0, e = getNumOptions(); i != e; ++i)
407 OptionNames.push_back(getOption(i));
411 enum ValueExpected getValueExpectedFlagDefault() const {
412 // If there is an ArgStr specified, then we are of the form:
414 // -opt=O2 or -opt O2 or -optO2
416 // In which case, the value is required. Otherwise if an arg str has not
417 // been specified, we are of the form:
419 // -O2 or O2 or -la (where -l and -a are separate options)
421 // If this is the case, we cannot allow a value.
424 return ValueRequired;
426 return ValueDisallowed;
429 // findOption - Return the option number corresponding to the specified
430 // argument string. If the option is not found, getNumOptions() is returned.
432 unsigned findOption(const char *Name);
438 // Default parser implementation - This implementation depends on having a
439 // mapping of recognized options to values of some sort. In addition to this,
440 // each entry in the mapping also tracks a help message that is printed with the
441 // command line option for --help. Because this is a simple mapping parser, the
442 // data type can be any unsupported type.
444 template <class DataType>
445 class parser : public generic_parser_base {
447 SmallVector<std::pair<const char *,
448 std::pair<DataType, const char *> >, 8> Values;
450 typedef DataType parser_data_type;
452 // Implement virtual functions needed by generic_parser_base
453 unsigned getNumOptions() const { return unsigned(Values.size()); }
454 const char *getOption(unsigned N) const { return Values[N].first; }
455 const char *getDescription(unsigned N) const {
456 return Values[N].second.second;
459 // parse - Return true on error.
460 bool parse(Option &O, const char *ArgName, const std::string &Arg,
468 for (unsigned i = 0, e = static_cast<unsigned>(Values.size());
470 if (ArgVal == Values[i].first) {
471 V = Values[i].second.first;
475 return O.error(": Cannot find option named '" + ArgVal + "'!");
478 /// addLiteralOption - Add an entry to the mapping table.
481 void addLiteralOption(const char *Name, const DT &V, const char *HelpStr) {
482 assert(findOption(Name) == Values.size() && "Option already exists!");
483 Values.push_back(std::make_pair(Name,
484 std::make_pair(static_cast<DataType>(V),HelpStr)));
485 MarkOptionsChanged();
488 /// removeLiteralOption - Remove the specified option.
490 void removeLiteralOption(const char *Name) {
491 unsigned N = findOption(Name);
492 assert(N != Values.size() && "Option not found!");
493 Values.erase(Values.begin()+N);
497 //--------------------------------------------------
498 // basic_parser - Super class of parsers to provide boilerplate code
500 struct basic_parser_impl { // non-template implementation of basic_parser<t>
501 virtual ~basic_parser_impl() {}
503 enum ValueExpected getValueExpectedFlagDefault() const {
504 return ValueRequired;
507 void getExtraOptionNames(std::vector<const char*> &) {}
509 void initialize(Option &) {}
511 // Return the width of the option tag for printing...
512 size_t getOptionWidth(const Option &O) const;
514 // printOptionInfo - Print out information about this option. The
515 // to-be-maintained width is specified.
517 void printOptionInfo(const Option &O, size_t GlobalWidth) const;
519 // getValueName - Overload in subclass to provide a better default value.
520 virtual const char *getValueName() const { return "value"; }
522 // An out-of-line virtual method to provide a 'home' for this class.
523 virtual void anchor();
526 // basic_parser - The real basic parser is just a template wrapper that provides
527 // a typedef for the provided data type.
529 template<class DataType>
530 struct basic_parser : public basic_parser_impl {
531 typedef DataType parser_data_type;
534 //--------------------------------------------------
538 class parser<bool> : public basic_parser<bool> {
540 // parse - Return true on error.
541 bool parse(Option &O, const char *ArgName, const std::string &Arg, bool &Val);
543 enum ValueExpected getValueExpectedFlagDefault() const {
544 return ValueOptional;
547 // getValueName - Do not print =<value> at all.
548 virtual const char *getValueName() const { return 0; }
550 // An out-of-line virtual method to provide a 'home' for this class.
551 virtual void anchor();
554 EXTERN_TEMPLATE_INSTANTIATION(class basic_parser<bool>);
556 //--------------------------------------------------
557 // parser<boolOrDefault>
558 enum boolOrDefault { BOU_UNSET, BOU_TRUE, BOU_FALSE };
560 class parser<boolOrDefault> : public basic_parser<boolOrDefault> {
562 // parse - Return true on error.
563 bool parse(Option &O, const char *ArgName, const std::string &Arg,
566 enum ValueExpected getValueExpectedFlagDefault() const {
567 return ValueOptional;
570 // getValueName - Do not print =<value> at all.
571 virtual const char *getValueName() const { return 0; }
573 // An out-of-line virtual method to provide a 'home' for this class.
574 virtual void anchor();
577 EXTERN_TEMPLATE_INSTANTIATION(class basic_parser<boolOrDefault>);
579 //--------------------------------------------------
583 class parser<int> : public basic_parser<int> {
585 // parse - Return true on error.
586 bool parse(Option &O, const char *ArgName, const std::string &Arg, int &Val);
588 // getValueName - Overload in subclass to provide a better default value.
589 virtual const char *getValueName() const { return "int"; }
591 // An out-of-line virtual method to provide a 'home' for this class.
592 virtual void anchor();
595 EXTERN_TEMPLATE_INSTANTIATION(class basic_parser<int>);
598 //--------------------------------------------------
602 class parser<unsigned> : public basic_parser<unsigned> {
604 // parse - Return true on error.
605 bool parse(Option &O, const char *AN, const std::string &Arg, unsigned &Val);
607 // getValueName - Overload in subclass to provide a better default value.
608 virtual const char *getValueName() const { return "uint"; }
610 // An out-of-line virtual method to provide a 'home' for this class.
611 virtual void anchor();
614 EXTERN_TEMPLATE_INSTANTIATION(class basic_parser<unsigned>);
616 //--------------------------------------------------
620 class parser<double> : public basic_parser<double> {
622 // parse - Return true on error.
623 bool parse(Option &O, const char *AN, const std::string &Arg, double &Val);
625 // getValueName - Overload in subclass to provide a better default value.
626 virtual const char *getValueName() const { return "number"; }
628 // An out-of-line virtual method to provide a 'home' for this class.
629 virtual void anchor();
632 EXTERN_TEMPLATE_INSTANTIATION(class basic_parser<double>);
634 //--------------------------------------------------
638 class parser<float> : public basic_parser<float> {
640 // parse - Return true on error.
641 bool parse(Option &O, const char *AN, const std::string &Arg, float &Val);
643 // getValueName - Overload in subclass to provide a better default value.
644 virtual const char *getValueName() const { return "number"; }
646 // An out-of-line virtual method to provide a 'home' for this class.
647 virtual void anchor();
650 EXTERN_TEMPLATE_INSTANTIATION(class basic_parser<float>);
652 //--------------------------------------------------
653 // parser<std::string>
656 class parser<std::string> : public basic_parser<std::string> {
658 // parse - Return true on error.
659 bool parse(Option &, const char *, const std::string &Arg,
660 std::string &Value) {
665 // getValueName - Overload in subclass to provide a better default value.
666 virtual const char *getValueName() const { return "string"; }
668 // An out-of-line virtual method to provide a 'home' for this class.
669 virtual void anchor();
672 EXTERN_TEMPLATE_INSTANTIATION(class basic_parser<std::string>);
674 //===----------------------------------------------------------------------===//
675 // applicator class - This class is used because we must use partial
676 // specialization to handle literal string arguments specially (const char* does
677 // not correctly respond to the apply method). Because the syntax to use this
678 // is a pain, we have the 'apply' method below to handle the nastiness...
680 template<class Mod> struct applicator {
682 static void opt(const Mod &M, Opt &O) { M.apply(O); }
685 // Handle const char* as a special case...
686 template<unsigned n> struct applicator<char[n]> {
688 static void opt(const char *Str, Opt &O) { O.setArgStr(Str); }
690 template<unsigned n> struct applicator<const char[n]> {
692 static void opt(const char *Str, Opt &O) { O.setArgStr(Str); }
694 template<> struct applicator<const char*> {
696 static void opt(const char *Str, Opt &O) { O.setArgStr(Str); }
699 template<> struct applicator<NumOccurrences> {
700 static void opt(NumOccurrences NO, Option &O) { O.setNumOccurrencesFlag(NO); }
702 template<> struct applicator<ValueExpected> {
703 static void opt(ValueExpected VE, Option &O) { O.setValueExpectedFlag(VE); }
705 template<> struct applicator<OptionHidden> {
706 static void opt(OptionHidden OH, Option &O) { O.setHiddenFlag(OH); }
708 template<> struct applicator<FormattingFlags> {
709 static void opt(FormattingFlags FF, Option &O) { O.setFormattingFlag(FF); }
711 template<> struct applicator<MiscFlags> {
712 static void opt(MiscFlags MF, Option &O) { O.setMiscFlag(MF); }
715 // apply method - Apply a modifier to an option in a type safe way.
716 template<class Mod, class Opt>
717 void apply(const Mod &M, Opt *O) {
718 applicator<Mod>::opt(M, *O);
722 //===----------------------------------------------------------------------===//
725 // Default storage class definition: external storage. This implementation
726 // assumes the user will specify a variable to store the data into with the
727 // cl::location(x) modifier.
729 template<class DataType, bool ExternalStorage, bool isClass>
731 DataType *Location; // Where to store the object...
734 assert(Location != 0 && "cl::location(...) not specified for a command "
735 "line option with external storage, "
736 "or cl::init specified before cl::location()!!");
739 opt_storage() : Location(0) {}
741 bool setLocation(Option &O, DataType &L) {
743 return O.error(": cl::location(x) specified more than once!");
749 void setValue(const T &V) {
754 DataType &getValue() { check(); return *Location; }
755 const DataType &getValue() const { check(); return *Location; }
759 // Define how to hold a class type object, such as a string. Since we can
760 // inherit from a class, we do so. This makes us exactly compatible with the
761 // object in all cases that it is used.
763 template<class DataType>
764 class opt_storage<DataType,false,true> : public DataType {
767 void setValue(const T &V) { DataType::operator=(V); }
769 DataType &getValue() { return *this; }
770 const DataType &getValue() const { return *this; }
773 // Define a partial specialization to handle things we cannot inherit from. In
774 // this case, we store an instance through containment, and overload operators
775 // to get at the value.
777 template<class DataType>
778 class opt_storage<DataType, false, false> {
782 // Make sure we initialize the value with the default constructor for the
784 opt_storage() : Value(DataType()) {}
787 void setValue(const T &V) { Value = V; }
788 DataType &getValue() { return Value; }
789 DataType getValue() const { return Value; }
791 // If the datatype is a pointer, support -> on it.
792 DataType operator->() const { return Value; }
796 //===----------------------------------------------------------------------===//
797 // opt - A scalar command line option.
799 template <class DataType, bool ExternalStorage = false,
800 class ParserClass = parser<DataType> >
801 class opt : public Option,
802 public opt_storage<DataType, ExternalStorage,
803 is_class<DataType>::value> {
806 virtual bool handleOccurrence(unsigned pos, const char *ArgName,
807 const std::string &Arg) {
808 typename ParserClass::parser_data_type Val =
809 typename ParserClass::parser_data_type();
810 if (Parser.parse(*this, ArgName, Arg, Val))
811 return true; // Parse error!
817 virtual enum ValueExpected getValueExpectedFlagDefault() const {
818 return Parser.getValueExpectedFlagDefault();
820 virtual void getExtraOptionNames(std::vector<const char*> &OptionNames) {
821 return Parser.getExtraOptionNames(OptionNames);
824 // Forward printing stuff to the parser...
825 virtual size_t getOptionWidth() const {return Parser.getOptionWidth(*this);}
826 virtual void printOptionInfo(size_t GlobalWidth) const {
827 Parser.printOptionInfo(*this, GlobalWidth);
832 Parser.initialize(*this);
835 // setInitialValue - Used by the cl::init modifier...
836 void setInitialValue(const DataType &V) { this->setValue(V); }
838 ParserClass &getParser() { return Parser; }
840 operator DataType() const { return this->getValue(); }
843 DataType &operator=(const T &Val) {
845 return this->getValue();
850 explicit opt(const M0t &M0) : Option(Optional | NotHidden) {
856 template<class M0t, class M1t>
857 opt(const M0t &M0, const M1t &M1) : Option(Optional | NotHidden) {
858 apply(M0, this); apply(M1, this);
863 template<class M0t, class M1t, class M2t>
864 opt(const M0t &M0, const M1t &M1,
865 const M2t &M2) : Option(Optional | NotHidden) {
866 apply(M0, this); apply(M1, this); apply(M2, this);
870 template<class M0t, class M1t, class M2t, class M3t>
871 opt(const M0t &M0, const M1t &M1, const M2t &M2,
872 const M3t &M3) : Option(Optional | NotHidden) {
873 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
877 template<class M0t, class M1t, class M2t, class M3t, class M4t>
878 opt(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3,
879 const M4t &M4) : Option(Optional | NotHidden) {
880 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
885 template<class M0t, class M1t, class M2t, class M3t,
886 class M4t, class M5t>
887 opt(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3,
888 const M4t &M4, const M5t &M5) : Option(Optional | NotHidden) {
889 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
890 apply(M4, this); apply(M5, this);
894 template<class M0t, class M1t, class M2t, class M3t,
895 class M4t, class M5t, class M6t>
896 opt(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3,
897 const M4t &M4, const M5t &M5,
898 const M6t &M6) : Option(Optional | NotHidden) {
899 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
900 apply(M4, this); apply(M5, this); apply(M6, this);
904 template<class M0t, class M1t, class M2t, class M3t,
905 class M4t, class M5t, class M6t, class M7t>
906 opt(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3,
907 const M4t &M4, const M5t &M5, const M6t &M6,
908 const M7t &M7) : Option(Optional | NotHidden) {
909 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
910 apply(M4, this); apply(M5, this); apply(M6, this); apply(M7, this);
915 EXTERN_TEMPLATE_INSTANTIATION(class opt<unsigned>);
916 EXTERN_TEMPLATE_INSTANTIATION(class opt<int>);
917 EXTERN_TEMPLATE_INSTANTIATION(class opt<std::string>);
918 EXTERN_TEMPLATE_INSTANTIATION(class opt<bool>);
920 //===----------------------------------------------------------------------===//
921 // list_storage class
923 // Default storage class definition: external storage. This implementation
924 // assumes the user will specify a variable to store the data into with the
925 // cl::location(x) modifier.
927 template<class DataType, class StorageClass>
929 StorageClass *Location; // Where to store the object...
932 list_storage() : Location(0) {}
934 bool setLocation(Option &O, StorageClass &L) {
936 return O.error(": cl::location(x) specified more than once!");
942 void addValue(const T &V) {
943 assert(Location != 0 && "cl::location(...) not specified for a command "
944 "line option with external storage!");
945 Location->push_back(V);
950 // Define how to hold a class type object, such as a string. Since we can
951 // inherit from a class, we do so. This makes us exactly compatible with the
952 // object in all cases that it is used.
954 template<class DataType>
955 class list_storage<DataType, bool> : public std::vector<DataType> {
958 void addValue(const T &V) { push_back(V); }
962 //===----------------------------------------------------------------------===//
963 // list - A list of command line options.
965 template <class DataType, class Storage = bool,
966 class ParserClass = parser<DataType> >
967 class list : public Option, public list_storage<DataType, Storage> {
968 std::vector<unsigned> Positions;
971 virtual enum ValueExpected getValueExpectedFlagDefault() const {
972 return Parser.getValueExpectedFlagDefault();
974 virtual void getExtraOptionNames(std::vector<const char*> &OptionNames) {
975 return Parser.getExtraOptionNames(OptionNames);
978 virtual bool handleOccurrence(unsigned pos, const char *ArgName,
979 const std::string &Arg) {
980 typename ParserClass::parser_data_type Val =
981 typename ParserClass::parser_data_type();
982 if (Parser.parse(*this, ArgName, Arg, Val))
983 return true; // Parse Error!
986 Positions.push_back(pos);
990 // Forward printing stuff to the parser...
991 virtual size_t getOptionWidth() const {return Parser.getOptionWidth(*this);}
992 virtual void printOptionInfo(size_t GlobalWidth) const {
993 Parser.printOptionInfo(*this, GlobalWidth);
998 Parser.initialize(*this);
1001 ParserClass &getParser() { return Parser; }
1003 unsigned getPosition(unsigned optnum) const {
1004 assert(optnum < this->size() && "Invalid option index");
1005 return Positions[optnum];
1008 void setNumAdditionalVals(unsigned n) {
1009 Option::setNumAdditionalVals(n);
1014 explicit list(const M0t &M0) : Option(ZeroOrMore | NotHidden) {
1019 template<class M0t, class M1t>
1020 list(const M0t &M0, const M1t &M1) : Option(ZeroOrMore | NotHidden) {
1021 apply(M0, this); apply(M1, this);
1025 template<class M0t, class M1t, class M2t>
1026 list(const M0t &M0, const M1t &M1, const M2t &M2)
1027 : Option(ZeroOrMore | NotHidden) {
1028 apply(M0, this); apply(M1, this); apply(M2, this);
1032 template<class M0t, class M1t, class M2t, class M3t>
1033 list(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3)
1034 : Option(ZeroOrMore | NotHidden) {
1035 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
1039 template<class M0t, class M1t, class M2t, class M3t, class M4t>
1040 list(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3,
1041 const M4t &M4) : Option(ZeroOrMore | NotHidden) {
1042 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
1047 template<class M0t, class M1t, class M2t, class M3t,
1048 class M4t, class M5t>
1049 list(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3,
1050 const M4t &M4, const M5t &M5) : Option(ZeroOrMore | NotHidden) {
1051 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
1052 apply(M4, this); apply(M5, this);
1056 template<class M0t, class M1t, class M2t, class M3t,
1057 class M4t, class M5t, class M6t>
1058 list(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3,
1059 const M4t &M4, const M5t &M5, const M6t &M6)
1060 : Option(ZeroOrMore | NotHidden) {
1061 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
1062 apply(M4, this); apply(M5, this); apply(M6, this);
1066 template<class M0t, class M1t, class M2t, class M3t,
1067 class M4t, class M5t, class M6t, class M7t>
1068 list(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3,
1069 const M4t &M4, const M5t &M5, const M6t &M6,
1070 const M7t &M7) : Option(ZeroOrMore | NotHidden) {
1071 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
1072 apply(M4, this); apply(M5, this); apply(M6, this); apply(M7, this);
1077 // multi_arg - Modifier to set the number of additional values.
1079 unsigned AdditionalVals;
1080 explicit multi_val(unsigned N) : AdditionalVals(N) {}
1082 template <typename D, typename S, typename P>
1083 void apply(list<D, S, P> &L) const { L.setNumAdditionalVals(AdditionalVals); }
1087 //===----------------------------------------------------------------------===//
1088 // bits_storage class
1090 // Default storage class definition: external storage. This implementation
1091 // assumes the user will specify a variable to store the data into with the
1092 // cl::location(x) modifier.
1094 template<class DataType, class StorageClass>
1095 class bits_storage {
1096 unsigned *Location; // Where to store the bits...
1099 static unsigned Bit(const T &V) {
1100 unsigned BitPos = reinterpret_cast<unsigned>(V);
1101 assert(BitPos < sizeof(unsigned) * 8 &&
1102 "enum exceeds width of bit vector!");
1107 bits_storage() : Location(0) {}
1109 bool setLocation(Option &O, unsigned &L) {
1111 return O.error(": cl::location(x) specified more than once!");
1117 void addValue(const T &V) {
1118 assert(Location != 0 && "cl::location(...) not specified for a command "
1119 "line option with external storage!");
1120 *Location |= Bit(V);
1123 unsigned getBits() { return *Location; }
1126 bool isSet(const T &V) {
1127 return (*Location & Bit(V)) != 0;
1132 // Define how to hold bits. Since we can inherit from a class, we do so.
1133 // This makes us exactly compatible with the bits in all cases that it is used.
1135 template<class DataType>
1136 class bits_storage<DataType, bool> {
1137 unsigned Bits; // Where to store the bits...
1140 static unsigned Bit(const T &V) {
1141 unsigned BitPos = reinterpret_cast<unsigned>(V);
1142 assert(BitPos < sizeof(unsigned) * 8 &&
1143 "enum exceeds width of bit vector!");
1149 void addValue(const T &V) {
1153 unsigned getBits() { return Bits; }
1156 bool isSet(const T &V) {
1157 return (Bits & Bit(V)) != 0;
1162 //===----------------------------------------------------------------------===//
1163 // bits - A bit vector of command options.
1165 template <class DataType, class Storage = bool,
1166 class ParserClass = parser<DataType> >
1167 class bits : public Option, public bits_storage<DataType, Storage> {
1168 std::vector<unsigned> Positions;
1171 virtual enum ValueExpected getValueExpectedFlagDefault() const {
1172 return Parser.getValueExpectedFlagDefault();
1174 virtual void getExtraOptionNames(std::vector<const char*> &OptionNames) {
1175 return Parser.getExtraOptionNames(OptionNames);
1178 virtual bool handleOccurrence(unsigned pos, const char *ArgName,
1179 const std::string &Arg) {
1180 typename ParserClass::parser_data_type Val =
1181 typename ParserClass::parser_data_type();
1182 if (Parser.parse(*this, ArgName, Arg, Val))
1183 return true; // Parse Error!
1186 Positions.push_back(pos);
1190 // Forward printing stuff to the parser...
1191 virtual size_t getOptionWidth() const {return Parser.getOptionWidth(*this);}
1192 virtual void printOptionInfo(size_t GlobalWidth) const {
1193 Parser.printOptionInfo(*this, GlobalWidth);
1198 Parser.initialize(*this);
1201 ParserClass &getParser() { return Parser; }
1203 unsigned getPosition(unsigned optnum) const {
1204 assert(optnum < this->size() && "Invalid option index");
1205 return Positions[optnum];
1210 explicit bits(const M0t &M0) : Option(ZeroOrMore | NotHidden) {
1215 template<class M0t, class M1t>
1216 bits(const M0t &M0, const M1t &M1) : Option(ZeroOrMore | NotHidden) {
1217 apply(M0, this); apply(M1, this);
1221 template<class M0t, class M1t, class M2t>
1222 bits(const M0t &M0, const M1t &M1, const M2t &M2)
1223 : Option(ZeroOrMore | NotHidden) {
1224 apply(M0, this); apply(M1, this); apply(M2, this);
1228 template<class M0t, class M1t, class M2t, class M3t>
1229 bits(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3)
1230 : Option(ZeroOrMore | NotHidden) {
1231 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
1235 template<class M0t, class M1t, class M2t, class M3t, class M4t>
1236 bits(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3,
1237 const M4t &M4) : Option(ZeroOrMore | NotHidden) {
1238 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
1243 template<class M0t, class M1t, class M2t, class M3t,
1244 class M4t, class M5t>
1245 bits(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3,
1246 const M4t &M4, const M5t &M5) : Option(ZeroOrMore | NotHidden) {
1247 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
1248 apply(M4, this); apply(M5, this);
1252 template<class M0t, class M1t, class M2t, class M3t,
1253 class M4t, class M5t, class M6t>
1254 bits(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3,
1255 const M4t &M4, const M5t &M5, const M6t &M6)
1256 : Option(ZeroOrMore | NotHidden) {
1257 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
1258 apply(M4, this); apply(M5, this); apply(M6, this);
1262 template<class M0t, class M1t, class M2t, class M3t,
1263 class M4t, class M5t, class M6t, class M7t>
1264 bits(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3,
1265 const M4t &M4, const M5t &M5, const M6t &M6,
1266 const M7t &M7) : Option(ZeroOrMore | NotHidden) {
1267 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
1268 apply(M4, this); apply(M5, this); apply(M6, this); apply(M7, this);
1273 //===----------------------------------------------------------------------===//
1274 // Aliased command line option (alias this name to a preexisting name)
1277 class alias : public Option {
1279 virtual bool handleOccurrence(unsigned pos, const char * /*ArgName*/,
1280 const std::string &Arg) {
1281 return AliasFor->handleOccurrence(pos, AliasFor->ArgStr, Arg);
1283 // Handle printing stuff...
1284 virtual size_t getOptionWidth() const;
1285 virtual void printOptionInfo(size_t GlobalWidth) const;
1289 error(": cl::alias must have argument name specified!");
1291 error(": cl::alias must have an cl::aliasopt(option) specified!");
1295 void setAliasFor(Option &O) {
1297 error(": cl::alias must only have one cl::aliasopt(...) specified!");
1303 explicit alias(const M0t &M0) : Option(Optional | Hidden), AliasFor(0) {
1308 template<class M0t, class M1t>
1309 alias(const M0t &M0, const M1t &M1) : Option(Optional | Hidden), AliasFor(0) {
1310 apply(M0, this); apply(M1, this);
1314 template<class M0t, class M1t, class M2t>
1315 alias(const M0t &M0, const M1t &M1, const M2t &M2)
1316 : Option(Optional | Hidden), AliasFor(0) {
1317 apply(M0, this); apply(M1, this); apply(M2, this);
1321 template<class M0t, class M1t, class M2t, class M3t>
1322 alias(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3)
1323 : Option(Optional | Hidden), AliasFor(0) {
1324 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
1329 // aliasfor - Modifier to set the option an alias aliases.
1332 explicit aliasopt(Option &O) : Opt(O) {}
1333 void apply(alias &A) const { A.setAliasFor(Opt); }
1336 // extrahelp - provide additional help at the end of the normal help
1337 // output. All occurrences of cl::extrahelp will be accumulated and
1338 // printed to std::cerr at the end of the regular help, just before
1341 const char * morehelp;
1342 explicit extrahelp(const char* help);
1345 void PrintVersionMessage();
1346 // This function just prints the help message, exactly the same way as if the
1347 // --help option had been given on the command line.
1348 // NOTE: THIS FUNCTION TERMINATES THE PROGRAM!
1349 void PrintHelpMessage();
1351 } // End namespace cl
1353 } // End namespace llvm