1 //===--- ArgList.h - Argument List Management -------------------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #ifndef LLVM_OPTION_ARGLIST_H 11 #define LLVM_OPTION_ARGLIST_H 12 13 #include "llvm/ADT/SmallVector.h" 14 #include "llvm/ADT/SmallString.h" 15 #include "llvm/ADT/StringRef.h" 16 #include "llvm/ADT/Twine.h" 17 #include "llvm/Option/Arg.h" 18 #include "llvm/Option/OptSpecifier.h" 19 #include "llvm/Option/Option.h" 20 #include <list> 21 #include <memory> 22 #include <string> 23 #include <vector> 24 25 namespace llvm { 26 namespace opt { 27 class ArgList; 28 class Option; 29 30 /// arg_iterator - Iterates through arguments stored inside an ArgList. 31 class arg_iterator { 32 /// The current argument. 33 SmallVectorImpl<Arg*>::const_iterator Current; 34 35 /// The argument list we are iterating over. 36 const ArgList &Args; 37 38 /// Optional filters on the arguments which will be match. Most clients 39 /// should never want to iterate over arguments without filters, so we won't 40 /// bother to factor this into two separate iterator implementations. 41 // 42 // FIXME: Make efficient; the idea is to provide efficient iteration over 43 // all arguments which match a particular id and then just provide an 44 // iterator combinator which takes multiple iterators which can be 45 // efficiently compared and returns them in order. 46 OptSpecifier Id0, Id1, Id2; 47 48 void SkipToNextArg(); 49 50 public: 51 typedef Arg * const * value_type; 52 typedef Arg * const & reference; 53 typedef Arg * const * pointer; 54 typedef std::forward_iterator_tag iterator_category; 55 typedef std::ptrdiff_t difference_type; 56 57 arg_iterator(SmallVectorImpl<Arg *>::const_iterator it, const ArgList &Args, 58 OptSpecifier Id0 = 0U, OptSpecifier Id1 = 0U, 59 OptSpecifier Id2 = 0U) 60 : Current(it), Args(Args), Id0(Id0), Id1(Id1), Id2(Id2) { 61 SkipToNextArg(); 62 } 63 64 operator const Arg*() { return *Current; } 65 reference operator*() const { return *Current; } 66 pointer operator->() const { return Current; } 67 68 arg_iterator &operator++() { 69 ++Current; 70 SkipToNextArg(); 71 return *this; 72 } 73 74 arg_iterator operator++(int) { 75 arg_iterator tmp(*this); 76 ++(*this); 77 return tmp; 78 } 79 80 friend bool operator==(arg_iterator LHS, arg_iterator RHS) { 81 return LHS.Current == RHS.Current; 82 } 83 friend bool operator!=(arg_iterator LHS, arg_iterator RHS) { 84 return !(LHS == RHS); 85 } 86 }; 87 88 /// ArgList - Ordered collection of driver arguments. 89 /// 90 /// The ArgList class manages a list of Arg instances as well as 91 /// auxiliary data and convenience methods to allow Tools to quickly 92 /// check for the presence of Arg instances for a particular Option 93 /// and to iterate over groups of arguments. 94 class ArgList { 95 public: 96 typedef SmallVector<Arg*, 16> arglist_type; 97 typedef arglist_type::iterator iterator; 98 typedef arglist_type::const_iterator const_iterator; 99 typedef arglist_type::reverse_iterator reverse_iterator; 100 typedef arglist_type::const_reverse_iterator const_reverse_iterator; 101 102 private: 103 /// The internal list of arguments. 104 arglist_type Args; 105 106 protected: 107 // Make the default special members protected so they won't be used to slice 108 // derived objects, but can still be used by derived objects to implement 109 // their own special members. 110 ArgList() = default; 111 // Explicit move operations to ensure the container is cleared post-move 112 // otherwise it could lead to a double-delete in the case of moving of an 113 // InputArgList which deletes the contents of the container. If we could fix 114 // up the ownership here (delegate storage/ownership to the derived class so 115 // it can be a container of unique_ptr) this would be simpler. 116 ArgList(ArgList &&RHS) : Args(std::move(RHS.Args)) { RHS.Args.clear(); } 117 ArgList &operator=(ArgList &&RHS) { 118 Args = std::move(RHS.Args); 119 RHS.Args.clear(); 120 return *this; 121 } 122 // Protect the dtor to ensure this type is never destroyed polymorphically. 123 ~ArgList() = default; 124 125 public: 126 127 /// @name Arg Access 128 /// @{ 129 130 /// append - Append \p A to the arg list. 131 void append(Arg *A); 132 133 arglist_type &getArgs() { return Args; } 134 const arglist_type &getArgs() const { return Args; } 135 136 unsigned size() const { return Args.size(); } 137 138 /// @} 139 /// @name Arg Iteration 140 /// @{ 141 142 iterator begin() { return Args.begin(); } 143 iterator end() { return Args.end(); } 144 145 reverse_iterator rbegin() { return Args.rbegin(); } 146 reverse_iterator rend() { return Args.rend(); } 147 148 const_iterator begin() const { return Args.begin(); } 149 const_iterator end() const { return Args.end(); } 150 151 const_reverse_iterator rbegin() const { return Args.rbegin(); } 152 const_reverse_iterator rend() const { return Args.rend(); } 153 154 arg_iterator filtered_begin(OptSpecifier Id0 = 0U, OptSpecifier Id1 = 0U, 155 OptSpecifier Id2 = 0U) const { 156 return arg_iterator(Args.begin(), *this, Id0, Id1, Id2); 157 } 158 arg_iterator filtered_end() const { 159 return arg_iterator(Args.end(), *this); 160 } 161 162 iterator_range<arg_iterator> filtered(OptSpecifier Id0 = 0U, 163 OptSpecifier Id1 = 0U, 164 OptSpecifier Id2 = 0U) const { 165 return make_range(filtered_begin(Id0, Id1, Id2), filtered_end()); 166 } 167 168 /// @} 169 /// @name Arg Removal 170 /// @{ 171 172 /// eraseArg - Remove any option matching \p Id. 173 void eraseArg(OptSpecifier Id); 174 175 /// @} 176 /// @name Arg Access 177 /// @{ 178 179 /// hasArg - Does the arg list contain any option matching \p Id. 180 /// 181 /// \p Claim Whether the argument should be claimed, if it exists. 182 bool hasArgNoClaim(OptSpecifier Id) const { 183 return getLastArgNoClaim(Id) != nullptr; 184 } 185 bool hasArg(OptSpecifier Id) const { 186 return getLastArg(Id) != nullptr; 187 } 188 bool hasArg(OptSpecifier Id0, OptSpecifier Id1) const { 189 return getLastArg(Id0, Id1) != nullptr; 190 } 191 bool hasArg(OptSpecifier Id0, OptSpecifier Id1, OptSpecifier Id2) const { 192 return getLastArg(Id0, Id1, Id2) != nullptr; 193 } 194 195 /// getLastArg - Return the last argument matching \p Id, or null. 196 /// 197 /// \p Claim Whether the argument should be claimed, if it exists. 198 Arg *getLastArgNoClaim(OptSpecifier Id) const; 199 Arg *getLastArgNoClaim(OptSpecifier Id0, OptSpecifier Id1) const; 200 Arg *getLastArgNoClaim(OptSpecifier Id0, OptSpecifier Id1, 201 OptSpecifier Id2) const; 202 Arg *getLastArgNoClaim(OptSpecifier Id0, OptSpecifier Id1, OptSpecifier Id2, 203 OptSpecifier Id3) const; 204 Arg *getLastArg(OptSpecifier Id) const; 205 Arg *getLastArg(OptSpecifier Id0, OptSpecifier Id1) const; 206 Arg *getLastArg(OptSpecifier Id0, OptSpecifier Id1, OptSpecifier Id2) const; 207 Arg *getLastArg(OptSpecifier Id0, OptSpecifier Id1, OptSpecifier Id2, 208 OptSpecifier Id3) const; 209 Arg *getLastArg(OptSpecifier Id0, OptSpecifier Id1, OptSpecifier Id2, 210 OptSpecifier Id3, OptSpecifier Id4) const; 211 Arg *getLastArg(OptSpecifier Id0, OptSpecifier Id1, OptSpecifier Id2, 212 OptSpecifier Id3, OptSpecifier Id4, OptSpecifier Id5) const; 213 Arg *getLastArg(OptSpecifier Id0, OptSpecifier Id1, OptSpecifier Id2, 214 OptSpecifier Id3, OptSpecifier Id4, OptSpecifier Id5, 215 OptSpecifier Id6) const; 216 Arg *getLastArg(OptSpecifier Id0, OptSpecifier Id1, OptSpecifier Id2, 217 OptSpecifier Id3, OptSpecifier Id4, OptSpecifier Id5, 218 OptSpecifier Id6, OptSpecifier Id7) const; 219 220 /// getArgString - Return the input argument string at \p Index. 221 virtual const char *getArgString(unsigned Index) const = 0; 222 223 /// getNumInputArgStrings - Return the number of original argument strings, 224 /// which are guaranteed to be the first strings in the argument string 225 /// list. 226 virtual unsigned getNumInputArgStrings() const = 0; 227 228 /// @} 229 /// @name Argument Lookup Utilities 230 /// @{ 231 232 /// getLastArgValue - Return the value of the last argument, or a default. 233 StringRef getLastArgValue(OptSpecifier Id, 234 StringRef Default = "") const; 235 236 /// getAllArgValues - Get the values of all instances of the given argument 237 /// as strings. 238 std::vector<std::string> getAllArgValues(OptSpecifier Id) const; 239 240 /// @} 241 /// @name Translation Utilities 242 /// @{ 243 244 /// hasFlag - Given an option \p Pos and its negative form \p Neg, return 245 /// true if the option is present, false if the negation is present, and 246 /// \p Default if neither option is given. If both the option and its 247 /// negation are present, the last one wins. 248 bool hasFlag(OptSpecifier Pos, OptSpecifier Neg, bool Default=true) const; 249 250 /// hasFlag - Given an option \p Pos, an alias \p PosAlias and its negative 251 /// form \p Neg, return true if the option or its alias is present, false if 252 /// the negation is present, and \p Default if none of the options are 253 /// given. If multiple options are present, the last one wins. 254 bool hasFlag(OptSpecifier Pos, OptSpecifier PosAlias, OptSpecifier Neg, 255 bool Default = true) const; 256 257 /// AddLastArg - Render only the last argument match \p Id0, if present. 258 void AddLastArg(ArgStringList &Output, OptSpecifier Id0) const; 259 void AddLastArg(ArgStringList &Output, OptSpecifier Id0, 260 OptSpecifier Id1) const; 261 262 /// AddAllArgs - Render all arguments matching any of the given ids. 263 void AddAllArgs(ArgStringList &Output, ArrayRef<OptSpecifier> Ids) const; 264 265 /// AddAllArgs - Render all arguments matching the given ids. 266 void AddAllArgs(ArgStringList &Output, OptSpecifier Id0, 267 OptSpecifier Id1 = 0U, OptSpecifier Id2 = 0U) const; 268 269 /// AddAllArgValues - Render the argument values of all arguments 270 /// matching the given ids. 271 void AddAllArgValues(ArgStringList &Output, OptSpecifier Id0, 272 OptSpecifier Id1 = 0U, OptSpecifier Id2 = 0U) const; 273 274 /// AddAllArgsTranslated - Render all the arguments matching the 275 /// given ids, but forced to separate args and using the provided 276 /// name instead of the first option value. 277 /// 278 /// \param Joined - If true, render the argument as joined with 279 /// the option specifier. 280 void AddAllArgsTranslated(ArgStringList &Output, OptSpecifier Id0, 281 const char *Translation, 282 bool Joined = false) const; 283 284 /// ClaimAllArgs - Claim all arguments which match the given 285 /// option id. 286 void ClaimAllArgs(OptSpecifier Id0) const; 287 288 /// ClaimAllArgs - Claim all arguments. 289 /// 290 void ClaimAllArgs() const; 291 292 /// @} 293 /// @name Arg Synthesis 294 /// @{ 295 296 /// Construct a constant string pointer whose 297 /// lifetime will match that of the ArgList. 298 virtual const char *MakeArgStringRef(StringRef Str) const = 0; 299 const char *MakeArgString(const Twine &Str) const { 300 SmallString<256> Buf; 301 return MakeArgStringRef(Str.toStringRef(Buf)); 302 } 303 304 /// \brief Create an arg string for (\p LHS + \p RHS), reusing the 305 /// string at \p Index if possible. 306 const char *GetOrMakeJoinedArgString(unsigned Index, StringRef LHS, 307 StringRef RHS) const; 308 309 void print(raw_ostream &O) const; 310 void dump() const; 311 312 /// @} 313 }; 314 315 class InputArgList final : public ArgList { 316 private: 317 /// List of argument strings used by the contained Args. 318 /// 319 /// This is mutable since we treat the ArgList as being the list 320 /// of Args, and allow routines to add new strings (to have a 321 /// convenient place to store the memory) via MakeIndex. 322 mutable ArgStringList ArgStrings; 323 324 /// Strings for synthesized arguments. 325 /// 326 /// This is mutable since we treat the ArgList as being the list 327 /// of Args, and allow routines to add new strings (to have a 328 /// convenient place to store the memory) via MakeIndex. 329 mutable std::list<std::string> SynthesizedStrings; 330 331 /// The number of original input argument strings. 332 unsigned NumInputArgStrings; 333 334 /// Release allocated arguments. 335 void releaseMemory(); 336 337 public: 338 InputArgList(const char* const *ArgBegin, const char* const *ArgEnd); 339 InputArgList(InputArgList &&RHS) 340 : ArgList(std::move(RHS)), ArgStrings(std::move(RHS.ArgStrings)), 341 SynthesizedStrings(std::move(RHS.SynthesizedStrings)), 342 NumInputArgStrings(RHS.NumInputArgStrings) {} 343 InputArgList &operator=(InputArgList &&RHS) { 344 releaseMemory(); 345 ArgList::operator=(std::move(RHS)); 346 ArgStrings = std::move(RHS.ArgStrings); 347 SynthesizedStrings = std::move(RHS.SynthesizedStrings); 348 NumInputArgStrings = RHS.NumInputArgStrings; 349 return *this; 350 } 351 ~InputArgList() { releaseMemory(); } 352 353 const char *getArgString(unsigned Index) const override { 354 return ArgStrings[Index]; 355 } 356 357 unsigned getNumInputArgStrings() const override { 358 return NumInputArgStrings; 359 } 360 361 /// @name Arg Synthesis 362 /// @{ 363 364 public: 365 /// MakeIndex - Get an index for the given string(s). 366 unsigned MakeIndex(StringRef String0) const; 367 unsigned MakeIndex(StringRef String0, StringRef String1) const; 368 369 using ArgList::MakeArgString; 370 const char *MakeArgStringRef(StringRef Str) const override; 371 372 /// @} 373 }; 374 375 /// DerivedArgList - An ordered collection of driver arguments, 376 /// whose storage may be in another argument list. 377 class DerivedArgList final : public ArgList { 378 const InputArgList &BaseArgs; 379 380 /// The list of arguments we synthesized. 381 mutable SmallVector<std::unique_ptr<Arg>, 16> SynthesizedArgs; 382 383 public: 384 /// Construct a new derived arg list from \p BaseArgs. 385 DerivedArgList(const InputArgList &BaseArgs); 386 387 const char *getArgString(unsigned Index) const override { 388 return BaseArgs.getArgString(Index); 389 } 390 391 unsigned getNumInputArgStrings() const override { 392 return BaseArgs.getNumInputArgStrings(); 393 } 394 395 const InputArgList &getBaseArgs() const { 396 return BaseArgs; 397 } 398 399 /// @name Arg Synthesis 400 /// @{ 401 402 /// AddSynthesizedArg - Add a argument to the list of synthesized arguments 403 /// (to be freed). 404 void AddSynthesizedArg(Arg *A); 405 406 using ArgList::MakeArgString; 407 const char *MakeArgStringRef(StringRef Str) const override; 408 409 /// AddFlagArg - Construct a new FlagArg for the given option \p Id and 410 /// append it to the argument list. 411 void AddFlagArg(const Arg *BaseArg, const Option Opt) { 412 append(MakeFlagArg(BaseArg, Opt)); 413 } 414 415 /// AddPositionalArg - Construct a new Positional arg for the given option 416 /// \p Id, with the provided \p Value and append it to the argument 417 /// list. 418 void AddPositionalArg(const Arg *BaseArg, const Option Opt, 419 StringRef Value) { 420 append(MakePositionalArg(BaseArg, Opt, Value)); 421 } 422 423 424 /// AddSeparateArg - Construct a new Positional arg for the given option 425 /// \p Id, with the provided \p Value and append it to the argument 426 /// list. 427 void AddSeparateArg(const Arg *BaseArg, const Option Opt, 428 StringRef Value) { 429 append(MakeSeparateArg(BaseArg, Opt, Value)); 430 } 431 432 433 /// AddJoinedArg - Construct a new Positional arg for the given option 434 /// \p Id, with the provided \p Value and append it to the argument list. 435 void AddJoinedArg(const Arg *BaseArg, const Option Opt, 436 StringRef Value) { 437 append(MakeJoinedArg(BaseArg, Opt, Value)); 438 } 439 440 441 /// MakeFlagArg - Construct a new FlagArg for the given option \p Id. 442 Arg *MakeFlagArg(const Arg *BaseArg, const Option Opt) const; 443 444 /// MakePositionalArg - Construct a new Positional arg for the 445 /// given option \p Id, with the provided \p Value. 446 Arg *MakePositionalArg(const Arg *BaseArg, const Option Opt, 447 StringRef Value) const; 448 449 /// MakeSeparateArg - Construct a new Positional arg for the 450 /// given option \p Id, with the provided \p Value. 451 Arg *MakeSeparateArg(const Arg *BaseArg, const Option Opt, 452 StringRef Value) const; 453 454 /// MakeJoinedArg - Construct a new Positional arg for the 455 /// given option \p Id, with the provided \p Value. 456 Arg *MakeJoinedArg(const Arg *BaseArg, const Option Opt, 457 StringRef Value) const; 458 459 /// @} 460 }; 461 462 } // end namespace opt 463 } // end namespace llvm 464 465 #endif 466
