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); }
305 // opposite_of - Allow the user to specify which other option this
306 // option is the opposite of.
309 LocationClass<bool> opposite_of(Ty &O) { return location(O.getValue()); }
312 //===----------------------------------------------------------------------===//
313 // Enum valued command line option
315 #define clEnumVal(ENUMVAL, DESC) #ENUMVAL, int(ENUMVAL), DESC
316 #define clEnumValN(ENUMVAL, FLAGNAME, DESC) FLAGNAME, int(ENUMVAL), DESC
317 #define clEnumValEnd (reinterpret_cast<void*>(0))
319 // values - For custom data types, allow specifying a group of values together
320 // as the values that go into the mapping that the option handler uses. Note
321 // that the values list must always have a 0 at the end of the list to indicate
322 // that the list has ended.
324 template<class DataType>
326 // Use a vector instead of a map, because the lists should be short,
327 // the overhead is less, and most importantly, it keeps them in the order
328 // inserted so we can print our option out nicely.
329 SmallVector<std::pair<const char *, std::pair<int, const char *> >,4> Values;
330 void processValues(va_list Vals);
332 ValuesClass(const char *EnumName, DataType Val, const char *Desc,
334 // Insert the first value, which is required.
335 Values.push_back(std::make_pair(EnumName, std::make_pair(Val, Desc)));
337 // Process the varargs portion of the values...
338 while (const char *enumName = va_arg(ValueArgs, const char *)) {
339 DataType EnumVal = static_cast<DataType>(va_arg(ValueArgs, int));
340 const char *EnumDesc = va_arg(ValueArgs, const char *);
341 Values.push_back(std::make_pair(enumName, // Add value to value map
342 std::make_pair(EnumVal, EnumDesc)));
347 void apply(Opt &O) const {
348 for (unsigned i = 0, e = static_cast<unsigned>(Values.size());
350 O.getParser().addLiteralOption(Values[i].first, Values[i].second.first,
351 Values[i].second.second);
355 template<class DataType>
356 ValuesClass<DataType> END_WITH_NULL values(const char *Arg, DataType Val,
357 const char *Desc, ...) {
359 va_start(ValueArgs, Desc);
360 ValuesClass<DataType> Vals(Arg, Val, Desc, ValueArgs);
366 //===----------------------------------------------------------------------===//
367 // parser class - Parameterizable parser for different data types. By default,
368 // known data types (string, int, bool) have specialized parsers, that do what
369 // you would expect. The default parser, used for data types that are not
370 // built-in, uses a mapping table to map specific options to values, which is
371 // used, among other things, to handle enum types.
373 //--------------------------------------------------
374 // generic_parser_base - This class holds all the non-generic code that we do
375 // not need replicated for every instance of the generic parser. This also
376 // allows us to put stuff into CommandLine.cpp
378 struct generic_parser_base {
379 virtual ~generic_parser_base() {} // Base class should have virtual-dtor
381 // getNumOptions - Virtual function implemented by generic subclass to
382 // indicate how many entries are in Values.
384 virtual unsigned getNumOptions() const = 0;
386 // getOption - Return option name N.
387 virtual const char *getOption(unsigned N) const = 0;
389 // getDescription - Return description N
390 virtual const char *getDescription(unsigned N) const = 0;
392 // Return the width of the option tag for printing...
393 virtual size_t getOptionWidth(const Option &O) const;
395 // printOptionInfo - Print out information about this option. The
396 // to-be-maintained width is specified.
398 virtual void printOptionInfo(const Option &O, size_t GlobalWidth) const;
400 void initialize(Option &O) {
401 // All of the modifiers for the option have been processed by now, so the
402 // argstr field should be stable, copy it down now.
404 hasArgStr = O.hasArgStr();
407 void getExtraOptionNames(std::vector<const char*> &OptionNames) {
408 // If there has been no argstr specified, that means that we need to add an
409 // argument for every possible option. This ensures that our options are
412 for (unsigned i = 0, e = getNumOptions(); i != e; ++i)
413 OptionNames.push_back(getOption(i));
417 enum ValueExpected getValueExpectedFlagDefault() const {
418 // If there is an ArgStr specified, then we are of the form:
420 // -opt=O2 or -opt O2 or -optO2
422 // In which case, the value is required. Otherwise if an arg str has not
423 // been specified, we are of the form:
425 // -O2 or O2 or -la (where -l and -a are separate options)
427 // If this is the case, we cannot allow a value.
430 return ValueRequired;
432 return ValueDisallowed;
435 // findOption - Return the option number corresponding to the specified
436 // argument string. If the option is not found, getNumOptions() is returned.
438 unsigned findOption(const char *Name);
444 // Default parser implementation - This implementation depends on having a
445 // mapping of recognized options to values of some sort. In addition to this,
446 // each entry in the mapping also tracks a help message that is printed with the
447 // command line option for --help. Because this is a simple mapping parser, the
448 // data type can be any unsupported type.
450 template <class DataType>
451 class parser : public generic_parser_base {
453 SmallVector<std::pair<const char *,
454 std::pair<DataType, const char *> >, 8> Values;
456 typedef DataType parser_data_type;
458 // Implement virtual functions needed by generic_parser_base
459 unsigned getNumOptions() const { return unsigned(Values.size()); }
460 const char *getOption(unsigned N) const { return Values[N].first; }
461 const char *getDescription(unsigned N) const {
462 return Values[N].second.second;
465 // parse - Return true on error.
466 bool parse(Option &O, const char *ArgName, const std::string &Arg,
474 for (unsigned i = 0, e = static_cast<unsigned>(Values.size());
476 if (ArgVal == Values[i].first) {
477 V = Values[i].second.first;
481 return O.error(": Cannot find option named '" + ArgVal + "'!");
484 /// addLiteralOption - Add an entry to the mapping table.
487 void addLiteralOption(const char *Name, const DT &V, const char *HelpStr) {
488 assert(findOption(Name) == Values.size() && "Option already exists!");
489 Values.push_back(std::make_pair(Name,
490 std::make_pair(static_cast<DataType>(V),HelpStr)));
491 MarkOptionsChanged();
494 /// removeLiteralOption - Remove the specified option.
496 void removeLiteralOption(const char *Name) {
497 unsigned N = findOption(Name);
498 assert(N != Values.size() && "Option not found!");
499 Values.erase(Values.begin()+N);
503 //--------------------------------------------------
504 // basic_parser - Super class of parsers to provide boilerplate code
506 struct basic_parser_impl { // non-template implementation of basic_parser<t>
507 virtual ~basic_parser_impl() {}
509 enum ValueExpected getValueExpectedFlagDefault() const {
510 return ValueRequired;
513 void getExtraOptionNames(std::vector<const char*> &) {}
515 void initialize(Option &) {}
517 // Return the width of the option tag for printing...
518 size_t getOptionWidth(const Option &O) const;
520 // printOptionInfo - Print out information about this option. The
521 // to-be-maintained width is specified.
523 void printOptionInfo(const Option &O, size_t GlobalWidth) const;
525 // getValueName - Overload in subclass to provide a better default value.
526 virtual const char *getValueName() const { return "value"; }
528 // An out-of-line virtual method to provide a 'home' for this class.
529 virtual void anchor();
532 // basic_parser - The real basic parser is just a template wrapper that provides
533 // a typedef for the provided data type.
535 template<class DataType>
536 struct basic_parser : public basic_parser_impl {
537 typedef DataType parser_data_type;
540 //--------------------------------------------------
544 class parser<bool> : public basic_parser<bool> {
546 // parse - Return true on error.
547 bool parse(Option &O, const char *ArgName, const std::string &Arg, bool &Val);
549 enum ValueExpected getValueExpectedFlagDefault() const {
550 return ValueOptional;
553 // getValueName - Do not print =<value> at all.
554 virtual const char *getValueName() const { return 0; }
556 // An out-of-line virtual method to provide a 'home' for this class.
557 virtual void anchor();
560 EXTERN_TEMPLATE_INSTANTIATION(class basic_parser<bool>);
562 //--------------------------------------------------
563 // parser<boolOrDefault>
564 enum boolOrDefault { BOU_UNSET, BOU_TRUE, BOU_FALSE };
566 class parser<boolOrDefault> : public basic_parser<boolOrDefault> {
568 // parse - Return true on error.
569 bool parse(Option &O, const char *ArgName, const std::string &Arg,
572 enum ValueExpected getValueExpectedFlagDefault() const {
573 return ValueOptional;
576 // getValueName - Do not print =<value> at all.
577 virtual const char *getValueName() const { return 0; }
579 // An out-of-line virtual method to provide a 'home' for this class.
580 virtual void anchor();
583 EXTERN_TEMPLATE_INSTANTIATION(class basic_parser<boolOrDefault>);
585 //--------------------------------------------------
586 // parser<boolInverse>
587 class boolInverse { };
589 class parser<boolInverse> : public basic_parser<bool> {
591 typedef bool parser_data_type;
592 // parse - Return true on error.
593 bool parse(Option &O, const char *ArgName, const std::string &Arg,
596 enum ValueExpected getValueExpectedFlagDefault() const {
597 return ValueOptional;
600 // getValueName - Do not print =<value> at all.
601 virtual const char *getValueName() const { return 0; }
603 // An out-of-line virtual method to provide a 'home' for this class.
604 virtual void anchor();
607 EXTERN_TEMPLATE_INSTANTIATION(class basic_parser<bool>);
609 //--------------------------------------------------
613 class parser<int> : public basic_parser<int> {
615 // parse - Return true on error.
616 bool parse(Option &O, const char *ArgName, const std::string &Arg, int &Val);
618 // getValueName - Overload in subclass to provide a better default value.
619 virtual const char *getValueName() const { return "int"; }
621 // An out-of-line virtual method to provide a 'home' for this class.
622 virtual void anchor();
625 EXTERN_TEMPLATE_INSTANTIATION(class basic_parser<int>);
628 //--------------------------------------------------
632 class parser<unsigned> : public basic_parser<unsigned> {
634 // parse - Return true on error.
635 bool parse(Option &O, const char *AN, const std::string &Arg, unsigned &Val);
637 // getValueName - Overload in subclass to provide a better default value.
638 virtual const char *getValueName() const { return "uint"; }
640 // An out-of-line virtual method to provide a 'home' for this class.
641 virtual void anchor();
644 EXTERN_TEMPLATE_INSTANTIATION(class basic_parser<unsigned>);
646 //--------------------------------------------------
650 class parser<double> : public basic_parser<double> {
652 // parse - Return true on error.
653 bool parse(Option &O, const char *AN, const std::string &Arg, double &Val);
655 // getValueName - Overload in subclass to provide a better default value.
656 virtual const char *getValueName() const { return "number"; }
658 // An out-of-line virtual method to provide a 'home' for this class.
659 virtual void anchor();
662 EXTERN_TEMPLATE_INSTANTIATION(class basic_parser<double>);
664 //--------------------------------------------------
668 class parser<float> : public basic_parser<float> {
670 // parse - Return true on error.
671 bool parse(Option &O, const char *AN, const std::string &Arg, float &Val);
673 // getValueName - Overload in subclass to provide a better default value.
674 virtual const char *getValueName() const { return "number"; }
676 // An out-of-line virtual method to provide a 'home' for this class.
677 virtual void anchor();
680 EXTERN_TEMPLATE_INSTANTIATION(class basic_parser<float>);
682 //--------------------------------------------------
683 // parser<std::string>
686 class parser<std::string> : public basic_parser<std::string> {
688 // parse - Return true on error.
689 bool parse(Option &, const char *, const std::string &Arg,
690 std::string &Value) {
695 // getValueName - Overload in subclass to provide a better default value.
696 virtual const char *getValueName() const { return "string"; }
698 // An out-of-line virtual method to provide a 'home' for this class.
699 virtual void anchor();
702 EXTERN_TEMPLATE_INSTANTIATION(class basic_parser<std::string>);
704 //===----------------------------------------------------------------------===//
705 // applicator class - This class is used because we must use partial
706 // specialization to handle literal string arguments specially (const char* does
707 // not correctly respond to the apply method). Because the syntax to use this
708 // is a pain, we have the 'apply' method below to handle the nastiness...
710 template<class Mod> struct applicator {
712 static void opt(const Mod &M, Opt &O) { M.apply(O); }
715 // Handle const char* as a special case...
716 template<unsigned n> struct applicator<char[n]> {
718 static void opt(const char *Str, Opt &O) { O.setArgStr(Str); }
720 template<unsigned n> struct applicator<const char[n]> {
722 static void opt(const char *Str, Opt &O) { O.setArgStr(Str); }
724 template<> struct applicator<const char*> {
726 static void opt(const char *Str, Opt &O) { O.setArgStr(Str); }
729 template<> struct applicator<NumOccurrences> {
730 static void opt(NumOccurrences NO, Option &O) { O.setNumOccurrencesFlag(NO); }
732 template<> struct applicator<ValueExpected> {
733 static void opt(ValueExpected VE, Option &O) { O.setValueExpectedFlag(VE); }
735 template<> struct applicator<OptionHidden> {
736 static void opt(OptionHidden OH, Option &O) { O.setHiddenFlag(OH); }
738 template<> struct applicator<FormattingFlags> {
739 static void opt(FormattingFlags FF, Option &O) { O.setFormattingFlag(FF); }
741 template<> struct applicator<MiscFlags> {
742 static void opt(MiscFlags MF, Option &O) { O.setMiscFlag(MF); }
745 // apply method - Apply a modifier to an option in a type safe way.
746 template<class Mod, class Opt>
747 void apply(const Mod &M, Opt *O) {
748 applicator<Mod>::opt(M, *O);
752 //===----------------------------------------------------------------------===//
755 // Default storage class definition: external storage. This implementation
756 // assumes the user will specify a variable to store the data into with the
757 // cl::location(x) modifier.
759 template<class DataType, bool ExternalStorage, bool isClass>
761 DataType *Location; // Where to store the object...
764 assert(Location != 0 && "cl::location(...) not specified for a command "
765 "line option with external storage, "
766 "or cl::init specified before cl::location()!!");
769 opt_storage() : Location(0) {}
771 bool setLocation(Option &O, DataType &L) {
773 return O.error(": cl::location(x) specified more than once!");
779 void setValue(const T &V) {
784 DataType &getValue() { check(); return *Location; }
785 const DataType &getValue() const { check(); return *Location; }
789 // Define how to hold a class type object, such as a string. Since we can
790 // inherit from a class, we do so. This makes us exactly compatible with the
791 // object in all cases that it is used.
793 template<class DataType>
794 class opt_storage<DataType,false,true> : public DataType {
797 void setValue(const T &V) { DataType::operator=(V); }
799 DataType &getValue() { return *this; }
800 const DataType &getValue() const { return *this; }
803 // Define a partial specialization to handle things we cannot inherit from. In
804 // this case, we store an instance through containment, and overload operators
805 // to get at the value.
807 template<class DataType>
808 class opt_storage<DataType, false, false> {
812 // Make sure we initialize the value with the default constructor for the
814 opt_storage() : Value(DataType()) {}
817 void setValue(const T &V) { Value = V; }
818 DataType &getValue() { return Value; }
819 DataType getValue() const { return Value; }
821 // If the datatype is a pointer, support -> on it.
822 DataType operator->() const { return Value; }
826 //===----------------------------------------------------------------------===//
827 // opt - A scalar command line option.
829 template <class DataType, bool ExternalStorage = false,
830 class ParserClass = parser<DataType> >
831 class opt : public Option,
832 public opt_storage<DataType, ExternalStorage,
833 is_class<DataType>::value> {
836 virtual bool handleOccurrence(unsigned pos, const char *ArgName,
837 const std::string &Arg) {
838 typename ParserClass::parser_data_type Val =
839 typename ParserClass::parser_data_type();
840 if (Parser.parse(*this, ArgName, Arg, Val))
841 return true; // Parse error!
847 virtual enum ValueExpected getValueExpectedFlagDefault() const {
848 return Parser.getValueExpectedFlagDefault();
850 virtual void getExtraOptionNames(std::vector<const char*> &OptionNames) {
851 return Parser.getExtraOptionNames(OptionNames);
854 // Forward printing stuff to the parser...
855 virtual size_t getOptionWidth() const {return Parser.getOptionWidth(*this);}
856 virtual void printOptionInfo(size_t GlobalWidth) const {
857 Parser.printOptionInfo(*this, GlobalWidth);
862 Parser.initialize(*this);
865 // setInitialValue - Used by the cl::init modifier...
866 void setInitialValue(const DataType &V) { this->setValue(V); }
868 ParserClass &getParser() { return Parser; }
870 operator DataType() const { return this->getValue(); }
873 DataType &operator=(const T &Val) {
875 return this->getValue();
880 explicit opt(const M0t &M0) : Option(Optional | NotHidden) {
886 template<class M0t, class M1t>
887 opt(const M0t &M0, const M1t &M1) : Option(Optional | NotHidden) {
888 apply(M0, this); apply(M1, this);
893 template<class M0t, class M1t, class M2t>
894 opt(const M0t &M0, const M1t &M1,
895 const M2t &M2) : Option(Optional | NotHidden) {
896 apply(M0, this); apply(M1, this); apply(M2, this);
900 template<class M0t, class M1t, class M2t, class M3t>
901 opt(const M0t &M0, const M1t &M1, const M2t &M2,
902 const M3t &M3) : Option(Optional | NotHidden) {
903 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
907 template<class M0t, class M1t, class M2t, class M3t, class M4t>
908 opt(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3,
909 const M4t &M4) : Option(Optional | NotHidden) {
910 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
915 template<class M0t, class M1t, class M2t, class M3t,
916 class M4t, class M5t>
917 opt(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3,
918 const M4t &M4, const M5t &M5) : Option(Optional | NotHidden) {
919 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
920 apply(M4, this); apply(M5, this);
924 template<class M0t, class M1t, class M2t, class M3t,
925 class M4t, class M5t, class M6t>
926 opt(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3,
927 const M4t &M4, const M5t &M5,
928 const M6t &M6) : Option(Optional | NotHidden) {
929 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
930 apply(M4, this); apply(M5, this); apply(M6, this);
934 template<class M0t, class M1t, class M2t, class M3t,
935 class M4t, class M5t, class M6t, class M7t>
936 opt(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3,
937 const M4t &M4, const M5t &M5, const M6t &M6,
938 const M7t &M7) : Option(Optional | NotHidden) {
939 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
940 apply(M4, this); apply(M5, this); apply(M6, this); apply(M7, this);
945 EXTERN_TEMPLATE_INSTANTIATION(class opt<unsigned>);
946 EXTERN_TEMPLATE_INSTANTIATION(class opt<int>);
947 EXTERN_TEMPLATE_INSTANTIATION(class opt<std::string>);
948 EXTERN_TEMPLATE_INSTANTIATION(class opt<bool>);
951 typedef opt<bool, true, parser<boolInverse> > inverse_opt;
953 //===----------------------------------------------------------------------===//
954 // list_storage class
956 // Default storage class definition: external storage. This implementation
957 // assumes the user will specify a variable to store the data into with the
958 // cl::location(x) modifier.
960 template<class DataType, class StorageClass>
962 StorageClass *Location; // Where to store the object...
965 list_storage() : Location(0) {}
967 bool setLocation(Option &O, StorageClass &L) {
969 return O.error(": cl::location(x) specified more than once!");
975 void addValue(const T &V) {
976 assert(Location != 0 && "cl::location(...) not specified for a command "
977 "line option with external storage!");
978 Location->push_back(V);
983 // Define how to hold a class type object, such as a string. Since we can
984 // inherit from a class, we do so. This makes us exactly compatible with the
985 // object in all cases that it is used.
987 template<class DataType>
988 class list_storage<DataType, bool> : public std::vector<DataType> {
991 void addValue(const T &V) { push_back(V); }
995 //===----------------------------------------------------------------------===//
996 // list - A list of command line options.
998 template <class DataType, class Storage = bool,
999 class ParserClass = parser<DataType> >
1000 class list : public Option, public list_storage<DataType, Storage> {
1001 std::vector<unsigned> Positions;
1004 virtual enum ValueExpected getValueExpectedFlagDefault() const {
1005 return Parser.getValueExpectedFlagDefault();
1007 virtual void getExtraOptionNames(std::vector<const char*> &OptionNames) {
1008 return Parser.getExtraOptionNames(OptionNames);
1011 virtual bool handleOccurrence(unsigned pos, const char *ArgName,
1012 const std::string &Arg) {
1013 typename ParserClass::parser_data_type Val =
1014 typename ParserClass::parser_data_type();
1015 if (Parser.parse(*this, ArgName, Arg, Val))
1016 return true; // Parse Error!
1019 Positions.push_back(pos);
1023 // Forward printing stuff to the parser...
1024 virtual size_t getOptionWidth() const {return Parser.getOptionWidth(*this);}
1025 virtual void printOptionInfo(size_t GlobalWidth) const {
1026 Parser.printOptionInfo(*this, GlobalWidth);
1031 Parser.initialize(*this);
1034 ParserClass &getParser() { return Parser; }
1036 unsigned getPosition(unsigned optnum) const {
1037 assert(optnum < this->size() && "Invalid option index");
1038 return Positions[optnum];
1041 void setNumAdditionalVals(unsigned n) {
1042 Option::setNumAdditionalVals(n);
1047 explicit list(const M0t &M0) : Option(ZeroOrMore | NotHidden) {
1052 template<class M0t, class M1t>
1053 list(const M0t &M0, const M1t &M1) : Option(ZeroOrMore | NotHidden) {
1054 apply(M0, this); apply(M1, this);
1058 template<class M0t, class M1t, class M2t>
1059 list(const M0t &M0, const M1t &M1, const M2t &M2)
1060 : Option(ZeroOrMore | NotHidden) {
1061 apply(M0, this); apply(M1, this); apply(M2, this);
1065 template<class M0t, class M1t, class M2t, class M3t>
1066 list(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3)
1067 : Option(ZeroOrMore | NotHidden) {
1068 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
1072 template<class M0t, class M1t, class M2t, class M3t, class M4t>
1073 list(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3,
1074 const M4t &M4) : Option(ZeroOrMore | NotHidden) {
1075 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
1080 template<class M0t, class M1t, class M2t, class M3t,
1081 class M4t, class M5t>
1082 list(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3,
1083 const M4t &M4, const M5t &M5) : Option(ZeroOrMore | NotHidden) {
1084 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
1085 apply(M4, this); apply(M5, this);
1089 template<class M0t, class M1t, class M2t, class M3t,
1090 class M4t, class M5t, class M6t>
1091 list(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3,
1092 const M4t &M4, const M5t &M5, const M6t &M6)
1093 : Option(ZeroOrMore | NotHidden) {
1094 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
1095 apply(M4, this); apply(M5, this); apply(M6, this);
1099 template<class M0t, class M1t, class M2t, class M3t,
1100 class M4t, class M5t, class M6t, class M7t>
1101 list(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3,
1102 const M4t &M4, const M5t &M5, const M6t &M6,
1103 const M7t &M7) : Option(ZeroOrMore | NotHidden) {
1104 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
1105 apply(M4, this); apply(M5, this); apply(M6, this); apply(M7, this);
1110 // multi_arg - Modifier to set the number of additional values.
1112 unsigned AdditionalVals;
1113 explicit multi_val(unsigned N) : AdditionalVals(N) {}
1115 template <typename D, typename S, typename P>
1116 void apply(list<D, S, P> &L) const { L.setNumAdditionalVals(AdditionalVals); }
1120 //===----------------------------------------------------------------------===//
1121 // bits_storage class
1123 // Default storage class definition: external storage. This implementation
1124 // assumes the user will specify a variable to store the data into with the
1125 // cl::location(x) modifier.
1127 template<class DataType, class StorageClass>
1128 class bits_storage {
1129 unsigned *Location; // Where to store the bits...
1132 static unsigned Bit(const T &V) {
1133 unsigned BitPos = reinterpret_cast<unsigned>(V);
1134 assert(BitPos < sizeof(unsigned) * 8 &&
1135 "enum exceeds width of bit vector!");
1140 bits_storage() : Location(0) {}
1142 bool setLocation(Option &O, unsigned &L) {
1144 return O.error(": cl::location(x) specified more than once!");
1150 void addValue(const T &V) {
1151 assert(Location != 0 && "cl::location(...) not specified for a command "
1152 "line option with external storage!");
1153 *Location |= Bit(V);
1156 unsigned getBits() { return *Location; }
1159 bool isSet(const T &V) {
1160 return (*Location & Bit(V)) != 0;
1165 // Define how to hold bits. Since we can inherit from a class, we do so.
1166 // This makes us exactly compatible with the bits in all cases that it is used.
1168 template<class DataType>
1169 class bits_storage<DataType, bool> {
1170 unsigned Bits; // Where to store the bits...
1173 static unsigned Bit(const T &V) {
1174 unsigned BitPos = reinterpret_cast<unsigned>(V);
1175 assert(BitPos < sizeof(unsigned) * 8 &&
1176 "enum exceeds width of bit vector!");
1182 void addValue(const T &V) {
1186 unsigned getBits() { return Bits; }
1189 bool isSet(const T &V) {
1190 return (Bits & Bit(V)) != 0;
1195 //===----------------------------------------------------------------------===//
1196 // bits - A bit vector of command options.
1198 template <class DataType, class Storage = bool,
1199 class ParserClass = parser<DataType> >
1200 class bits : public Option, public bits_storage<DataType, Storage> {
1201 std::vector<unsigned> Positions;
1204 virtual enum ValueExpected getValueExpectedFlagDefault() const {
1205 return Parser.getValueExpectedFlagDefault();
1207 virtual void getExtraOptionNames(std::vector<const char*> &OptionNames) {
1208 return Parser.getExtraOptionNames(OptionNames);
1211 virtual bool handleOccurrence(unsigned pos, const char *ArgName,
1212 const std::string &Arg) {
1213 typename ParserClass::parser_data_type Val =
1214 typename ParserClass::parser_data_type();
1215 if (Parser.parse(*this, ArgName, Arg, Val))
1216 return true; // Parse Error!
1219 Positions.push_back(pos);
1223 // Forward printing stuff to the parser...
1224 virtual size_t getOptionWidth() const {return Parser.getOptionWidth(*this);}
1225 virtual void printOptionInfo(size_t GlobalWidth) const {
1226 Parser.printOptionInfo(*this, GlobalWidth);
1231 Parser.initialize(*this);
1234 ParserClass &getParser() { return Parser; }
1236 unsigned getPosition(unsigned optnum) const {
1237 assert(optnum < this->size() && "Invalid option index");
1238 return Positions[optnum];
1243 explicit bits(const M0t &M0) : Option(ZeroOrMore | NotHidden) {
1248 template<class M0t, class M1t>
1249 bits(const M0t &M0, const M1t &M1) : Option(ZeroOrMore | NotHidden) {
1250 apply(M0, this); apply(M1, this);
1254 template<class M0t, class M1t, class M2t>
1255 bits(const M0t &M0, const M1t &M1, const M2t &M2)
1256 : Option(ZeroOrMore | NotHidden) {
1257 apply(M0, this); apply(M1, this); apply(M2, this);
1261 template<class M0t, class M1t, class M2t, class M3t>
1262 bits(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3)
1263 : Option(ZeroOrMore | NotHidden) {
1264 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
1268 template<class M0t, class M1t, class M2t, class M3t, class M4t>
1269 bits(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3,
1270 const M4t &M4) : Option(ZeroOrMore | NotHidden) {
1271 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
1276 template<class M0t, class M1t, class M2t, class M3t,
1277 class M4t, class M5t>
1278 bits(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3,
1279 const M4t &M4, const M5t &M5) : Option(ZeroOrMore | NotHidden) {
1280 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
1281 apply(M4, this); apply(M5, this);
1285 template<class M0t, class M1t, class M2t, class M3t,
1286 class M4t, class M5t, class M6t>
1287 bits(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3,
1288 const M4t &M4, const M5t &M5, const M6t &M6)
1289 : Option(ZeroOrMore | NotHidden) {
1290 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
1291 apply(M4, this); apply(M5, this); apply(M6, this);
1295 template<class M0t, class M1t, class M2t, class M3t,
1296 class M4t, class M5t, class M6t, class M7t>
1297 bits(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3,
1298 const M4t &M4, const M5t &M5, const M6t &M6,
1299 const M7t &M7) : Option(ZeroOrMore | NotHidden) {
1300 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
1301 apply(M4, this); apply(M5, this); apply(M6, this); apply(M7, this);
1306 //===----------------------------------------------------------------------===//
1307 // Aliased command line option (alias this name to a preexisting name)
1310 class alias : public Option {
1312 virtual bool handleOccurrence(unsigned pos, const char * /*ArgName*/,
1313 const std::string &Arg) {
1314 return AliasFor->handleOccurrence(pos, AliasFor->ArgStr, Arg);
1316 // Handle printing stuff...
1317 virtual size_t getOptionWidth() const;
1318 virtual void printOptionInfo(size_t GlobalWidth) const;
1322 error(": cl::alias must have argument name specified!");
1324 error(": cl::alias must have an cl::aliasopt(option) specified!");
1328 void setAliasFor(Option &O) {
1330 error(": cl::alias must only have one cl::aliasopt(...) specified!");
1336 explicit alias(const M0t &M0) : Option(Optional | Hidden), AliasFor(0) {
1341 template<class M0t, class M1t>
1342 alias(const M0t &M0, const M1t &M1) : Option(Optional | Hidden), AliasFor(0) {
1343 apply(M0, this); apply(M1, this);
1347 template<class M0t, class M1t, class M2t>
1348 alias(const M0t &M0, const M1t &M1, const M2t &M2)
1349 : Option(Optional | Hidden), AliasFor(0) {
1350 apply(M0, this); apply(M1, this); apply(M2, this);
1354 template<class M0t, class M1t, class M2t, class M3t>
1355 alias(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3)
1356 : Option(Optional | Hidden), AliasFor(0) {
1357 apply(M0, this); apply(M1, this); apply(M2, this); apply(M3, this);
1362 // aliasfor - Modifier to set the option an alias aliases.
1365 explicit aliasopt(Option &O) : Opt(O) {}
1366 void apply(alias &A) const { A.setAliasFor(Opt); }
1369 // extrahelp - provide additional help at the end of the normal help
1370 // output. All occurrences of cl::extrahelp will be accumulated and
1371 // printed to std::cerr at the end of the regular help, just before
1374 const char * morehelp;
1375 explicit extrahelp(const char* help);
1378 void PrintVersionMessage();
1379 // This function just prints the help message, exactly the same way as if the
1380 // --help option had been given on the command line.
1381 // NOTE: THIS FUNCTION TERMINATES THE PROGRAM!
1382 void PrintHelpMessage();
1384 } // End namespace cl
1386 } // End namespace llvm