unittests/ADT/StringRefTest.cpp

   1 //===- llvm/unittest/ADT/StringRefTest.cpp - StringRef unit tests ---------===//
   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 #include "llvm/ADT/StringRef.h"
  11 #include "llvm/ADT/Hashing.h"
  12 #include "llvm/ADT/STLExtras.h"
  13 #include "llvm/ADT/SmallVector.h"
  14 #include "llvm/ADT/StringExtras.h"
  15 #include "llvm/Support/Allocator.h"
  16 #include "llvm/Support/raw_ostream.h"
  17 #include "gtest/gtest.h"
  18 using namespace llvm;
  19
  20 namespace llvm {
  21
  22 std::ostream &operator<<(std::ostream &OS, const StringRef &S) {
  23   OS << S.str();
  24   return OS;
  25 }
  26
  27 std::ostream &operator<<(std::ostream &OS,
  28                          const std::pair<StringRef, StringRef> &P) {
  29   OS << "(" << P.first << ", " << P.second << ")";
  30   return OS;
  31 }
  32
  33 }
  34
  35 // Check that we can't accidentally assign a temporary std::string to a
  36 // StringRef. (Unfortunately we can't make use of the same thing with
  37 // constructors.)
  38 //
  39 // Disable this check under MSVC; even MSVC 2015 isn't consistent between
  40 // std::is_assignable and actually writing such an assignment.
  41 #if !defined(_MSC_VER)
  42 static_assert(
  43     !std::is_assignable<StringRef, std::string>::value,
  44     "Assigning from prvalue std::string");
  45 static_assert(
  46     !std::is_assignable<StringRef, std::string &&>::value,
  47     "Assigning from xvalue std::string");
  48 static_assert(
  49     std::is_assignable<StringRef, std::string &>::value,
  50     "Assigning from lvalue std::string");
  51 static_assert(
  52     std::is_assignable<StringRef, const char *>::value,
  53     "Assigning from prvalue C string");
  54 static_assert(
  55     std::is_assignable<StringRef, const char * &&>::value,
  56     "Assigning from xvalue C string");
  57 static_assert(
  58     std::is_assignable<StringRef, const char * &>::value,
  59     "Assigning from lvalue C string");
  60 #endif
  61
  62
  63 namespace {
  64 TEST(StringRefTest, Construction) {
  65   EXPECT_EQ("", StringRef());
  66   EXPECT_EQ("hello", StringRef("hello"));
  67   EXPECT_EQ("hello", StringRef("hello world", 5));
  68   EXPECT_EQ("hello", StringRef(std::string("hello")));
  69 }
  70
  71 TEST(StringRefTest, EmptyInitializerList) {
  72   StringRef S = {};
  73   EXPECT_TRUE(S.empty());
  74
  75   S = {};
  76   EXPECT_TRUE(S.empty());
  77 }
  78
  79 TEST(StringRefTest, Iteration) {
  80   StringRef S("hello");
  81   const char *p = "hello";
  82   for (const char *it = S.begin(), *ie = S.end(); it != ie; ++it, ++p)
  83     EXPECT_EQ(*it, *p);
  84 }
  85
  86 TEST(StringRefTest, StringOps) {
  87   const char *p = "hello";
  88   EXPECT_EQ(p, StringRef(p, 0).data());
  89   EXPECT_TRUE(StringRef().empty());
  90   EXPECT_EQ((size_t) 5, StringRef("hello").size());
  91   EXPECT_EQ(-1, StringRef("aab").compare("aad"));
  92   EXPECT_EQ( 0, StringRef("aab").compare("aab"));
  93   EXPECT_EQ( 1, StringRef("aab").compare("aaa"));
  94   EXPECT_EQ(-1, StringRef("aab").compare("aabb"));
  95   EXPECT_EQ( 1, StringRef("aab").compare("aa"));
  96   EXPECT_EQ( 1, StringRef("\xFF").compare("\1"));
  97
  98   EXPECT_EQ(-1, StringRef("AaB").compare_lower("aAd"));
  99   EXPECT_EQ( 0, StringRef("AaB").compare_lower("aab"));
 100   EXPECT_EQ( 1, StringRef("AaB").compare_lower("AAA"));
 101   EXPECT_EQ(-1, StringRef("AaB").compare_lower("aaBb"));
 102   EXPECT_EQ(-1, StringRef("AaB").compare_lower("bb"));
 103   EXPECT_EQ( 1, StringRef("aaBb").compare_lower("AaB"));
 104   EXPECT_EQ( 1, StringRef("bb").compare_lower("AaB"));
 105   EXPECT_EQ( 1, StringRef("AaB").compare_lower("aA"));
 106   EXPECT_EQ( 1, StringRef("\xFF").compare_lower("\1"));
 107
 108   EXPECT_EQ(-1, StringRef("aab").compare_numeric("aad"));
 109   EXPECT_EQ( 0, StringRef("aab").compare_numeric("aab"));
 110   EXPECT_EQ( 1, StringRef("aab").compare_numeric("aaa"));
 111   EXPECT_EQ(-1, StringRef("aab").compare_numeric("aabb"));
 112   EXPECT_EQ( 1, StringRef("aab").compare_numeric("aa"));
 113   EXPECT_EQ(-1, StringRef("1").compare_numeric("10"));
 114   EXPECT_EQ( 0, StringRef("10").compare_numeric("10"));
 115   EXPECT_EQ( 0, StringRef("10a").compare_numeric("10a"));
 116   EXPECT_EQ( 1, StringRef("2").compare_numeric("1"));
 117   EXPECT_EQ( 0, StringRef("llvm_v1i64_ty").compare_numeric("llvm_v1i64_ty"));
 118   EXPECT_EQ( 1, StringRef("\xFF").compare_numeric("\1"));
 119   EXPECT_EQ( 1, StringRef("V16").compare_numeric("V1_q0"));
 120   EXPECT_EQ(-1, StringRef("V1_q0").compare_numeric("V16"));
 121   EXPECT_EQ(-1, StringRef("V8_q0").compare_numeric("V16"));
 122   EXPECT_EQ( 1, StringRef("V16").compare_numeric("V8_q0"));
 123   EXPECT_EQ(-1, StringRef("V1_q0").compare_numeric("V8_q0"));
 124   EXPECT_EQ( 1, StringRef("V8_q0").compare_numeric("V1_q0"));
 125 }
 126
 127 TEST(StringRefTest, Operators) {
 128   EXPECT_EQ("", StringRef());
 129   EXPECT_TRUE(StringRef("aab") < StringRef("aad"));
 130   EXPECT_FALSE(StringRef("aab") < StringRef("aab"));
 131   EXPECT_TRUE(StringRef("aab") <= StringRef("aab"));
 132   EXPECT_FALSE(StringRef("aab") <= StringRef("aaa"));
 133   EXPECT_TRUE(StringRef("aad") > StringRef("aab"));
 134   EXPECT_FALSE(StringRef("aab") > StringRef("aab"));
 135   EXPECT_TRUE(StringRef("aab") >= StringRef("aab"));
 136   EXPECT_FALSE(StringRef("aaa") >= StringRef("aab"));
 137   EXPECT_EQ(StringRef("aab"), StringRef("aab"));
 138   EXPECT_FALSE(StringRef("aab") == StringRef("aac"));
 139   EXPECT_FALSE(StringRef("aab") != StringRef("aab"));
 140   EXPECT_TRUE(StringRef("aab") != StringRef("aac"));
 141   EXPECT_EQ('a', StringRef("aab")[1]);
 142 }
 143
 144 TEST(StringRefTest, Substr) {
 145   StringRef Str("hello");
 146   EXPECT_EQ("lo", Str.substr(3));
 147   EXPECT_EQ("", Str.substr(100));
 148   EXPECT_EQ("hello", Str.substr(0, 100));
 149   EXPECT_EQ("o", Str.substr(4, 10));
 150 }
 151
 152 TEST(StringRefTest, Slice) {
 153   StringRef Str("hello");
 154   EXPECT_EQ("l", Str.slice(2, 3));
 155   EXPECT_EQ("ell", Str.slice(1, 4));
 156   EXPECT_EQ("llo", Str.slice(2, 100));
 157   EXPECT_EQ("", Str.slice(2, 1));
 158   EXPECT_EQ("", Str.slice(10, 20));
 159 }
 160
 161 TEST(StringRefTest, Split) {
 162   StringRef Str("hello");
 163   EXPECT_EQ(std::make_pair(StringRef("hello"), StringRef("")),
 164             Str.split('X'));
 165   EXPECT_EQ(std::make_pair(StringRef("h"), StringRef("llo")),
 166             Str.split('e'));
 167   EXPECT_EQ(std::make_pair(StringRef(""), StringRef("ello")),
 168             Str.split('h'));
 169   EXPECT_EQ(std::make_pair(StringRef("he"), StringRef("lo")),
 170             Str.split('l'));
 171   EXPECT_EQ(std::make_pair(StringRef("hell"), StringRef("")),
 172             Str.split('o'));
 173
 174   EXPECT_EQ(std::make_pair(StringRef("hello"), StringRef("")),
 175             Str.rsplit('X'));
 176   EXPECT_EQ(std::make_pair(StringRef("h"), StringRef("llo")),
 177             Str.rsplit('e'));
 178   EXPECT_EQ(std::make_pair(StringRef(""), StringRef("ello")),
 179             Str.rsplit('h'));
 180   EXPECT_EQ(std::make_pair(StringRef("hel"), StringRef("o")),
 181             Str.rsplit('l'));
 182   EXPECT_EQ(std::make_pair(StringRef("hell"), StringRef("")),
 183             Str.rsplit('o'));
 184 }
 185
 186 TEST(StringRefTest, Split2) {
 187   SmallVector<StringRef, 5> parts;
 188   SmallVector<StringRef, 5> expected;
 189
 190   expected.push_back("ab"); expected.push_back("c");
 191   StringRef(",ab,,c,").split(parts, ",", -1, false);
 192   EXPECT_TRUE(parts == expected);
 193
 194   expected.clear(); parts.clear();
 195   expected.push_back(""); expected.push_back("ab"); expected.push_back("");
 196   expected.push_back("c"); expected.push_back("");
 197   StringRef(",ab,,c,").split(parts, ",", -1, true);
 198   EXPECT_TRUE(parts == expected);
 199
 200   expected.clear(); parts.clear();
 201   expected.push_back("");
 202   StringRef("").split(parts, ",", -1, true);
 203   EXPECT_TRUE(parts == expected);
 204
 205   expected.clear(); parts.clear();
 206   StringRef("").split(parts, ",", -1, false);
 207   EXPECT_TRUE(parts == expected);
 208
 209   expected.clear(); parts.clear();
 210   StringRef(",").split(parts, ",", -1, false);
 211   EXPECT_TRUE(parts == expected);
 212
 213   expected.clear(); parts.clear();
 214   expected.push_back(""); expected.push_back("");
 215   StringRef(",").split(parts, ",", -1, true);
 216   EXPECT_TRUE(parts == expected);
 217
 218   expected.clear(); parts.clear();
 219   expected.push_back("a"); expected.push_back("b");
 220   StringRef("a,b").split(parts, ",", -1, true);
 221   EXPECT_TRUE(parts == expected);
 222
 223   // Test MaxSplit
 224   expected.clear(); parts.clear();
 225   expected.push_back("a,,b,c");
 226   StringRef("a,,b,c").split(parts, ",", 0, true);
 227   EXPECT_TRUE(parts == expected);
 228
 229   expected.clear(); parts.clear();
 230   expected.push_back("a,,b,c");
 231   StringRef("a,,b,c").split(parts, ",", 0, false);
 232   EXPECT_TRUE(parts == expected);
 233
 234   expected.clear(); parts.clear();
 235   expected.push_back("a"); expected.push_back(",b,c");
 236   StringRef("a,,b,c").split(parts, ",", 1, true);
 237   EXPECT_TRUE(parts == expected);
 238
 239   expected.clear(); parts.clear();
 240   expected.push_back("a"); expected.push_back(",b,c");
 241   StringRef("a,,b,c").split(parts, ",", 1, false);
 242   EXPECT_TRUE(parts == expected);
 243
 244   expected.clear(); parts.clear();
 245   expected.push_back("a"); expected.push_back(""); expected.push_back("b,c");
 246   StringRef("a,,b,c").split(parts, ",", 2, true);
 247   EXPECT_TRUE(parts == expected);
 248
 249   expected.clear(); parts.clear();
 250   expected.push_back("a"); expected.push_back("b,c");
 251   StringRef("a,,b,c").split(parts, ",", 2, false);
 252   EXPECT_TRUE(parts == expected);
 253
 254   expected.clear(); parts.clear();
 255   expected.push_back("a"); expected.push_back(""); expected.push_back("b");
 256   expected.push_back("c");
 257   StringRef("a,,b,c").split(parts, ",", 3, true);
 258   EXPECT_TRUE(parts == expected);
 259
 260   expected.clear(); parts.clear();
 261   expected.push_back("a"); expected.push_back("b"); expected.push_back("c");
 262   StringRef("a,,b,c").split(parts, ",", 3, false);
 263   EXPECT_TRUE(parts == expected);
 264
 265   expected.clear(); parts.clear();
 266   expected.push_back("a"); expected.push_back("b"); expected.push_back("c");
 267   StringRef("a,,b,c").split(parts, ',', 3, false);
 268   EXPECT_TRUE(parts == expected);
 269
 270   expected.clear(); parts.clear();
 271   expected.push_back("");
 272   StringRef().split(parts, ",", 0, true);
 273   EXPECT_TRUE(parts == expected);
 274
 275   expected.clear(); parts.clear();
 276   expected.push_back(StringRef());
 277   StringRef("").split(parts, ",", 0, true);
 278   EXPECT_TRUE(parts == expected);
 279
 280   expected.clear(); parts.clear();
 281   StringRef("").split(parts, ",", 0, false);
 282   EXPECT_TRUE(parts == expected);
 283   StringRef().split(parts, ",", 0, false);
 284   EXPECT_TRUE(parts == expected);
 285
 286   expected.clear(); parts.clear();
 287   expected.push_back("a");
 288   expected.push_back("");
 289   expected.push_back("b");
 290   expected.push_back("c,d");
 291   StringRef("a,,b,c,d").split(parts, ",", 3, true);
 292   EXPECT_TRUE(parts == expected);
 293
 294   expected.clear(); parts.clear();
 295   expected.push_back("");
 296   StringRef().split(parts, ',', 0, true);
 297   EXPECT_TRUE(parts == expected);
 298
 299   expected.clear(); parts.clear();
 300   expected.push_back(StringRef());
 301   StringRef("").split(parts, ',', 0, true);
 302   EXPECT_TRUE(parts == expected);
 303
 304   expected.clear(); parts.clear();
 305   StringRef("").split(parts, ',', 0, false);
 306   EXPECT_TRUE(parts == expected);
 307   StringRef().split(parts, ',', 0, false);
 308   EXPECT_TRUE(parts == expected);
 309
 310   expected.clear(); parts.clear();
 311   expected.push_back("a");
 312   expected.push_back("");
 313   expected.push_back("b");
 314   expected.push_back("c,d");
 315   StringRef("a,,b,c,d").split(parts, ',', 3, true);
 316   EXPECT_TRUE(parts == expected);
 317 }
 318
 319 TEST(StringRefTest, Trim) {
 320   StringRef Str0("hello");
 321   StringRef Str1(" hello ");
 322   StringRef Str2("  hello  ");
 323
 324   EXPECT_EQ(StringRef("hello"), Str0.rtrim());
 325   EXPECT_EQ(StringRef(" hello"), Str1.rtrim());
 326   EXPECT_EQ(StringRef("  hello"), Str2.rtrim());
 327   EXPECT_EQ(StringRef("hello"), Str0.ltrim());
 328   EXPECT_EQ(StringRef("hello "), Str1.ltrim());
 329   EXPECT_EQ(StringRef("hello  "), Str2.ltrim());
 330   EXPECT_EQ(StringRef("hello"), Str0.trim());
 331   EXPECT_EQ(StringRef("hello"), Str1.trim());
 332   EXPECT_EQ(StringRef("hello"), Str2.trim());
 333
 334   EXPECT_EQ(StringRef("ello"), Str0.trim("hhhhhhhhhhh"));
 335
 336   EXPECT_EQ(StringRef(""), StringRef("").trim());
 337   EXPECT_EQ(StringRef(""), StringRef(" ").trim());
 338   EXPECT_EQ(StringRef("\0", 1), StringRef(" \0 ", 3).trim());
 339   EXPECT_EQ(StringRef("\0\0", 2), StringRef("\0\0", 2).trim());
 340   EXPECT_EQ(StringRef("x"), StringRef("\0\0x\0\0", 5).trim('\0'));
 341 }
 342
 343 TEST(StringRefTest, StartsWith) {
 344   StringRef Str("hello");
 345   EXPECT_TRUE(Str.startswith(""));
 346   EXPECT_TRUE(Str.startswith("he"));
 347   EXPECT_FALSE(Str.startswith("helloworld"));
 348   EXPECT_FALSE(Str.startswith("hi"));
 349 }
 350
 351 TEST(StringRefTest, StartsWithLower) {
 352   StringRef Str("heLLo");
 353   EXPECT_TRUE(Str.startswith_lower(""));
 354   EXPECT_TRUE(Str.startswith_lower("he"));
 355   EXPECT_TRUE(Str.startswith_lower("hell"));
 356   EXPECT_TRUE(Str.startswith_lower("HELlo"));
 357   EXPECT_FALSE(Str.startswith_lower("helloworld"));
 358   EXPECT_FALSE(Str.startswith_lower("hi"));
 359 }
 360
 361 TEST(StringRefTest, ConsumeFront) {
 362   StringRef Str("hello");
 363   EXPECT_TRUE(Str.consume_front(""));
 364   EXPECT_EQ("hello", Str);
 365   EXPECT_TRUE(Str.consume_front("he"));
 366   EXPECT_EQ("llo", Str);
 367   EXPECT_FALSE(Str.consume_front("lloworld"));
 368   EXPECT_EQ("llo", Str);
 369   EXPECT_FALSE(Str.consume_front("lol"));
 370   EXPECT_EQ("llo", Str);
 371   EXPECT_TRUE(Str.consume_front("llo"));
 372   EXPECT_EQ("", Str);
 373   EXPECT_FALSE(Str.consume_front("o"));
 374   EXPECT_TRUE(Str.consume_front(""));
 375 }
 376
 377 TEST(StringRefTest, EndsWith) {
 378   StringRef Str("hello");
 379   EXPECT_TRUE(Str.endswith(""));
 380   EXPECT_TRUE(Str.endswith("lo"));
 381   EXPECT_FALSE(Str.endswith("helloworld"));
 382   EXPECT_FALSE(Str.endswith("worldhello"));
 383   EXPECT_FALSE(Str.endswith("so"));
 384 }
 385
 386 TEST(StringRefTest, EndsWithLower) {
 387   StringRef Str("heLLo");
 388   EXPECT_TRUE(Str.endswith_lower(""));
 389   EXPECT_TRUE(Str.endswith_lower("lo"));
 390   EXPECT_TRUE(Str.endswith_lower("LO"));
 391   EXPECT_TRUE(Str.endswith_lower("ELlo"));
 392   EXPECT_FALSE(Str.endswith_lower("helloworld"));
 393   EXPECT_FALSE(Str.endswith_lower("hi"));
 394 }
 395
 396 TEST(StringRefTest, ConsumeBack) {
 397   StringRef Str("hello");
 398   EXPECT_TRUE(Str.consume_back(""));
 399   EXPECT_EQ("hello", Str);
 400   EXPECT_TRUE(Str.consume_back("lo"));
 401   EXPECT_EQ("hel", Str);
 402   EXPECT_FALSE(Str.consume_back("helhel"));
 403   EXPECT_EQ("hel", Str);
 404   EXPECT_FALSE(Str.consume_back("hle"));
 405   EXPECT_EQ("hel", Str);
 406   EXPECT_TRUE(Str.consume_back("hel"));
 407   EXPECT_EQ("", Str);
 408   EXPECT_FALSE(Str.consume_back("h"));
 409   EXPECT_TRUE(Str.consume_back(""));
 410 }
 411
 412 TEST(StringRefTest, Find) {
 413   StringRef Str("helloHELLO");
 414   StringRef LongStr("hellx xello hell ello world foo bar hello HELLO");
 415
 416   struct {
 417     StringRef Str;
 418     char C;
 419     std::size_t From;
 420     std::size_t Pos;
 421     std::size_t LowerPos;
 422   } CharExpectations[] = {
 423       {Str, 'h', 0U, 0U, 0U},
 424       {Str, 'e', 0U, 1U, 1U},
 425       {Str, 'l', 0U, 2U, 2U},
 426       {Str, 'l', 3U, 3U, 3U},
 427       {Str, 'o', 0U, 4U, 4U},
 428       {Str, 'L', 0U, 7U, 2U},
 429       {Str, 'z', 0U, StringRef::npos, StringRef::npos},
 430   };
 431
 432   struct {
 433     StringRef Str;
 434     llvm::StringRef S;
 435     std::size_t From;
 436     std::size_t Pos;
 437     std::size_t LowerPos;
 438   } StrExpectations[] = {
 439       {Str, "helloword", 0, StringRef::npos, StringRef::npos},
 440       {Str, "hello", 0, 0U, 0U},
 441       {Str, "ello", 0, 1U, 1U},
 442       {Str, "zz", 0, StringRef::npos, StringRef::npos},
 443       {Str, "ll", 2U, 2U, 2U},
 444       {Str, "ll", 3U, StringRef::npos, 7U},
 445       {Str, "LL", 2U, 7U, 2U},
 446       {Str, "LL", 3U, 7U, 7U},
 447       {Str, "", 0U, 0U, 0U},
 448       {LongStr, "hello", 0U, 36U, 36U},
 449       {LongStr, "foo", 0U, 28U, 28U},
 450       {LongStr, "hell", 2U, 12U, 12U},
 451       {LongStr, "HELL", 2U, 42U, 12U},
 452       {LongStr, "", 0U, 0U, 0U}};
 453
 454   for (auto &E : CharExpectations) {
 455     EXPECT_EQ(E.Pos, E.Str.find(E.C, E.From));
 456     EXPECT_EQ(E.LowerPos, E.Str.find_lower(E.C, E.From));
 457     EXPECT_EQ(E.LowerPos, E.Str.find_lower(toupper(E.C), E.From));
 458   }
 459
 460   for (auto &E : StrExpectations) {
 461     EXPECT_EQ(E.Pos, E.Str.find(E.S, E.From));
 462     EXPECT_EQ(E.LowerPos, E.Str.find_lower(E.S, E.From));
 463     EXPECT_EQ(E.LowerPos, E.Str.find_lower(E.S.upper(), E.From));
 464   }
 465
 466   EXPECT_EQ(3U, Str.rfind('l'));
 467   EXPECT_EQ(StringRef::npos, Str.rfind('z'));
 468   EXPECT_EQ(StringRef::npos, Str.rfind("helloworld"));
 469   EXPECT_EQ(0U, Str.rfind("hello"));
 470   EXPECT_EQ(1U, Str.rfind("ello"));
 471   EXPECT_EQ(StringRef::npos, Str.rfind("zz"));
 472
 473   EXPECT_EQ(8U, Str.rfind_lower('l'));
 474   EXPECT_EQ(8U, Str.rfind_lower('L'));
 475   EXPECT_EQ(StringRef::npos, Str.rfind_lower('z'));
 476   EXPECT_EQ(StringRef::npos, Str.rfind_lower("HELLOWORLD"));
 477   EXPECT_EQ(5U, Str.rfind("HELLO"));
 478   EXPECT_EQ(6U, Str.rfind("ELLO"));
 479   EXPECT_EQ(StringRef::npos, Str.rfind("ZZ"));
 480
 481   EXPECT_EQ(2U, Str.find_first_of('l'));
 482   EXPECT_EQ(1U, Str.find_first_of("el"));
 483   EXPECT_EQ(StringRef::npos, Str.find_first_of("xyz"));
 484
 485   Str = "hello";
 486   EXPECT_EQ(1U, Str.find_first_not_of('h'));
 487   EXPECT_EQ(4U, Str.find_first_not_of("hel"));
 488   EXPECT_EQ(StringRef::npos, Str.find_first_not_of("hello"));
 489
 490   EXPECT_EQ(3U, Str.find_last_not_of('o'));
 491   EXPECT_EQ(1U, Str.find_last_not_of("lo"));
 492   EXPECT_EQ(StringRef::npos, Str.find_last_not_of("helo"));
 493 }
 494
 495 TEST(StringRefTest, Count) {
 496   StringRef Str("hello");
 497   EXPECT_EQ(2U, Str.count('l'));
 498   EXPECT_EQ(1U, Str.count('o'));
 499   EXPECT_EQ(0U, Str.count('z'));
 500   EXPECT_EQ(0U, Str.count("helloworld"));
 501   EXPECT_EQ(1U, Str.count("hello"));
 502   EXPECT_EQ(1U, Str.count("ello"));
 503   EXPECT_EQ(0U, Str.count("zz"));
 504 }
 505
 506 TEST(StringRefTest, EditDistance) {
 507   StringRef Hello("hello");
 508   EXPECT_EQ(2U, Hello.edit_distance("hill"));
 509
 510   StringRef Industry("industry");
 511   EXPECT_EQ(6U, Industry.edit_distance("interest"));
 512
 513   StringRef Soylent("soylent green is people");
 514   EXPECT_EQ(19U, Soylent.edit_distance("people soiled our green"));
 515   EXPECT_EQ(26U, Soylent.edit_distance("people soiled our green",
 516                                       /* allow replacements = */ false));
 517   EXPECT_EQ(9U, Soylent.edit_distance("people soiled our green",
 518                                       /* allow replacements = */ true,
 519                                       /* max edit distance = */ 8));
 520   EXPECT_EQ(53U, Soylent.edit_distance("people soiled our green "
 521                                        "people soiled our green "
 522                                        "people soiled our green "));
 523 }
 524
 525 TEST(StringRefTest, Misc) {
 526   std::string Storage;
 527   raw_string_ostream OS(Storage);
 528   OS << StringRef("hello");
 529   EXPECT_EQ("hello", OS.str());
 530 }
 531
 532 TEST(StringRefTest, Hashing) {
 533   EXPECT_EQ(hash_value(std::string()), hash_value(StringRef()));
 534   EXPECT_EQ(hash_value(std::string()), hash_value(StringRef("")));
 535   std::string S = "hello world";
 536   hash_code H = hash_value(S);
 537   EXPECT_EQ(H, hash_value(StringRef("hello world")));
 538   EXPECT_EQ(H, hash_value(StringRef(S)));
 539   EXPECT_NE(H, hash_value(StringRef("hello worl")));
 540   EXPECT_EQ(hash_value(std::string("hello worl")),
 541             hash_value(StringRef("hello worl")));
 542   EXPECT_NE(H, hash_value(StringRef("hello world ")));
 543   EXPECT_EQ(hash_value(std::string("hello world ")),
 544             hash_value(StringRef("hello world ")));
 545   EXPECT_EQ(H, hash_value(StringRef("hello world\0")));
 546   EXPECT_NE(hash_value(std::string("ello worl")),
 547             hash_value(StringRef("hello world").slice(1, -1)));
 548 }
 549
 550 struct UnsignedPair {
 551   const char *Str;
 552   uint64_t Expected;
 553 } Unsigned[] =
 554   { {"0", 0}
 555   , {"255", 255}
 556   , {"256", 256}
 557   , {"65535", 65535}
 558   , {"65536", 65536}
 559   , {"4294967295", 4294967295ULL}
 560   , {"4294967296", 4294967296ULL}
 561   , {"18446744073709551615", 18446744073709551615ULL}
 562   , {"042", 34}
 563   , {"0x42", 66}
 564   , {"0b101010", 42}
 565   };
 566
 567 struct SignedPair {
 568   const char *Str;
 569   int64_t Expected;
 570 } Signed[] =
 571   { {"0", 0}
 572   , {"-0", 0}
 573   , {"127", 127}
 574   , {"128", 128}
 575   , {"-128", -128}
 576   , {"-129", -129}
 577   , {"32767", 32767}
 578   , {"32768", 32768}
 579   , {"-32768", -32768}
 580   , {"-32769", -32769}
 581   , {"2147483647", 2147483647LL}
 582   , {"2147483648", 2147483648LL}
 583   , {"-2147483648", -2147483648LL}
 584   , {"-2147483649", -2147483649LL}
 585   , {"-9223372036854775808", -(9223372036854775807LL) - 1}
 586   , {"042", 34}
 587   , {"0x42", 66}
 588   , {"0b101010", 42}
 589   , {"-042", -34}
 590   , {"-0x42", -66}
 591   , {"-0b101010", -42}
 592   };
 593
 594 TEST(StringRefTest, getAsInteger) {
 595   uint8_t U8;
 596   uint16_t U16;
 597   uint32_t U32;
 598   uint64_t U64;
 599
 600   for (size_t i = 0; i < array_lengthof(Unsigned); ++i) {
 601     bool U8Success = StringRef(Unsigned[i].Str).getAsInteger(0, U8);
 602     if (static_cast<uint8_t>(Unsigned[i].Expected) == Unsigned[i].Expected) {
 603       ASSERT_FALSE(U8Success);
 604       EXPECT_EQ(U8, Unsigned[i].Expected);
 605     } else {
 606       ASSERT_TRUE(U8Success);
 607     }
 608     bool U16Success = StringRef(Unsigned[i].Str).getAsInteger(0, U16);
 609     if (static_cast<uint16_t>(Unsigned[i].Expected) == Unsigned[i].Expected) {
 610       ASSERT_FALSE(U16Success);
 611       EXPECT_EQ(U16, Unsigned[i].Expected);
 612     } else {
 613       ASSERT_TRUE(U16Success);
 614     }
 615     bool U32Success = StringRef(Unsigned[i].Str).getAsInteger(0, U32);
 616     if (static_cast<uint32_t>(Unsigned[i].Expected) == Unsigned[i].Expected) {
 617       ASSERT_FALSE(U32Success);
 618       EXPECT_EQ(U32, Unsigned[i].Expected);
 619     } else {
 620       ASSERT_TRUE(U32Success);
 621     }
 622     bool U64Success = StringRef(Unsigned[i].Str).getAsInteger(0, U64);
 623     if (static_cast<uint64_t>(Unsigned[i].Expected) == Unsigned[i].Expected) {
 624       ASSERT_FALSE(U64Success);
 625       EXPECT_EQ(U64, Unsigned[i].Expected);
 626     } else {
 627       ASSERT_TRUE(U64Success);
 628     }
 629   }
 630
 631   int8_t S8;
 632   int16_t S16;
 633   int32_t S32;
 634   int64_t S64;
 635
 636   for (size_t i = 0; i < array_lengthof(Signed); ++i) {
 637     bool S8Success = StringRef(Signed[i].Str).getAsInteger(0, S8);
 638     if (static_cast<int8_t>(Signed[i].Expected) == Signed[i].Expected) {
 639       ASSERT_FALSE(S8Success);
 640       EXPECT_EQ(S8, Signed[i].Expected);
 641     } else {
 642       ASSERT_TRUE(S8Success);
 643     }
 644     bool S16Success = StringRef(Signed[i].Str).getAsInteger(0, S16);
 645     if (static_cast<int16_t>(Signed[i].Expected) == Signed[i].Expected) {
 646       ASSERT_FALSE(S16Success);
 647       EXPECT_EQ(S16, Signed[i].Expected);
 648     } else {
 649       ASSERT_TRUE(S16Success);
 650     }
 651     bool S32Success = StringRef(Signed[i].Str).getAsInteger(0, S32);
 652     if (static_cast<int32_t>(Signed[i].Expected) == Signed[i].Expected) {
 653       ASSERT_FALSE(S32Success);
 654       EXPECT_EQ(S32, Signed[i].Expected);
 655     } else {
 656       ASSERT_TRUE(S32Success);
 657     }
 658     bool S64Success = StringRef(Signed[i].Str).getAsInteger(0, S64);
 659     if (static_cast<int64_t>(Signed[i].Expected) == Signed[i].Expected) {
 660       ASSERT_FALSE(S64Success);
 661       EXPECT_EQ(S64, Signed[i].Expected);
 662     } else {
 663       ASSERT_TRUE(S64Success);
 664     }
 665   }
 666 }
 667
 668
 669 static const char* BadStrings[] = {
 670     ""                      // empty string
 671   , "18446744073709551617"  // value just over max
 672   , "123456789012345678901" // value way too large
 673   , "4t23v"                 // illegal decimal characters
 674   , "0x123W56"              // illegal hex characters
 675   , "0b2"                   // illegal bin characters
 676   , "08"                    // illegal oct characters
 677   , "0o8"                   // illegal oct characters
 678   , "-123"                  // negative unsigned value
 679   , "0x"
 680   , "0b"
 681 };
 682
 683
 684 TEST(StringRefTest, getAsUnsignedIntegerBadStrings) {
 685   unsigned long long U64;
 686   for (size_t i = 0; i < array_lengthof(BadStrings); ++i) {
 687     bool IsBadNumber = StringRef(BadStrings[i]).getAsInteger(0, U64);
 688     ASSERT_TRUE(IsBadNumber);
 689   }
 690 }
 691
 692 struct ConsumeUnsignedPair {
 693   const char *Str;
 694   uint64_t Expected;
 695   const char *Leftover;
 696 } ConsumeUnsigned[] = {
 697     {"0", 0, ""},
 698     {"255", 255, ""},
 699     {"256", 256, ""},
 700     {"65535", 65535, ""},
 701     {"65536", 65536, ""},
 702     {"4294967295", 4294967295ULL, ""},
 703     {"4294967296", 4294967296ULL, ""},
 704     {"255A376", 255, "A376"},
 705     {"18446744073709551615", 18446744073709551615ULL, ""},
 706     {"18446744073709551615ABC", 18446744073709551615ULL, "ABC"},
 707     {"042", 34, ""},
 708     {"0x42", 66, ""},
 709     {"0x42-0x34", 66, "-0x34"},
 710     {"0b101010", 42, ""},
 711     {"0429F", 042, "9F"},            // Auto-sensed octal radix, invalid digit
 712     {"0x42G12", 0x42, "G12"},        // Auto-sensed hex radix, invalid digit
 713     {"0b10101020101", 42, "20101"}}; // Auto-sensed binary radix, invalid digit.
 714
 715 struct ConsumeSignedPair {
 716   const char *Str;
 717   int64_t Expected;
 718   const char *Leftover;
 719 } ConsumeSigned[] = {
 720     {"0", 0, ""},
 721     {"-0", 0, ""},
 722     {"0-1", 0, "-1"},
 723     {"-0-1", 0, "-1"},
 724     {"127", 127, ""},
 725     {"128", 128, ""},
 726     {"127-1", 127, "-1"},
 727     {"128-1", 128, "-1"},
 728     {"-128", -128, ""},
 729     {"-129", -129, ""},
 730     {"-128-1", -128, "-1"},
 731     {"-129-1", -129, "-1"},
 732     {"32767", 32767, ""},
 733     {"32768", 32768, ""},
 734     {"32767-1", 32767, "-1"},
 735     {"32768-1", 32768, "-1"},
 736     {"-32768", -32768, ""},
 737     {"-32769", -32769, ""},
 738     {"-32768-1", -32768, "-1"},
 739     {"-32769-1", -32769, "-1"},
 740     {"2147483647", 2147483647LL, ""},
 741     {"2147483648", 2147483648LL, ""},
 742     {"2147483647-1", 2147483647LL, "-1"},
 743     {"2147483648-1", 2147483648LL, "-1"},
 744     {"-2147483648", -2147483648LL, ""},
 745     {"-2147483649", -2147483649LL, ""},
 746     {"-2147483648-1", -2147483648LL, "-1"},
 747     {"-2147483649-1", -2147483649LL, "-1"},
 748     {"-9223372036854775808", -(9223372036854775807LL) - 1, ""},
 749     {"-9223372036854775808-1", -(9223372036854775807LL) - 1, "-1"},
 750     {"042", 34, ""},
 751     {"042-1", 34, "-1"},
 752     {"0x42", 66, ""},
 753     {"0x42-1", 66, "-1"},
 754     {"0b101010", 42, ""},
 755     {"0b101010-1", 42, "-1"},
 756     {"-042", -34, ""},
 757     {"-042-1", -34, "-1"},
 758     {"-0x42", -66, ""},
 759     {"-0x42-1", -66, "-1"},
 760     {"-0b101010", -42, ""},
 761     {"-0b101010-1", -42, "-1"}};
 762
 763 TEST(StringRefTest, consumeIntegerUnsigned) {
 764   uint8_t U8;
 765   uint16_t U16;
 766   uint32_t U32;
 767   uint64_t U64;
 768
 769   for (size_t i = 0; i < array_lengthof(ConsumeUnsigned); ++i) {
 770     StringRef Str = ConsumeUnsigned[i].Str;
 771     bool U8Success = Str.consumeInteger(0, U8);
 772     if (static_cast<uint8_t>(ConsumeUnsigned[i].Expected) ==
 773         ConsumeUnsigned[i].Expected) {
 774       ASSERT_FALSE(U8Success);
 775       EXPECT_EQ(U8, ConsumeUnsigned[i].Expected);
 776       EXPECT_EQ(Str, ConsumeUnsigned[i].Leftover);
 777     } else {
 778       ASSERT_TRUE(U8Success);
 779     }
 780
 781     Str = ConsumeUnsigned[i].Str;
 782     bool U16Success = Str.consumeInteger(0, U16);
 783     if (static_cast<uint16_t>(ConsumeUnsigned[i].Expected) ==
 784         ConsumeUnsigned[i].Expected) {
 785       ASSERT_FALSE(U16Success);
 786       EXPECT_EQ(U16, ConsumeUnsigned[i].Expected);
 787       EXPECT_EQ(Str, ConsumeUnsigned[i].Leftover);
 788     } else {
 789       ASSERT_TRUE(U16Success);
 790     }
 791
 792     Str = ConsumeUnsigned[i].Str;
 793     bool U32Success = Str.consumeInteger(0, U32);
 794     if (static_cast<uint32_t>(ConsumeUnsigned[i].Expected) ==
 795         ConsumeUnsigned[i].Expected) {
 796       ASSERT_FALSE(U32Success);
 797       EXPECT_EQ(U32, ConsumeUnsigned[i].Expected);
 798       EXPECT_EQ(Str, ConsumeUnsigned[i].Leftover);
 799     } else {
 800       ASSERT_TRUE(U32Success);
 801     }
 802
 803     Str = ConsumeUnsigned[i].Str;
 804     bool U64Success = Str.consumeInteger(0, U64);
 805     if (static_cast<uint64_t>(ConsumeUnsigned[i].Expected) ==
 806         ConsumeUnsigned[i].Expected) {
 807       ASSERT_FALSE(U64Success);
 808       EXPECT_EQ(U64, ConsumeUnsigned[i].Expected);
 809       EXPECT_EQ(Str, ConsumeUnsigned[i].Leftover);
 810     } else {
 811       ASSERT_TRUE(U64Success);
 812     }
 813   }
 814 }
 815
 816 TEST(StringRefTest, consumeIntegerSigned) {
 817   int8_t S8;
 818   int16_t S16;
 819   int32_t S32;
 820   int64_t S64;
 821
 822   for (size_t i = 0; i < array_lengthof(ConsumeSigned); ++i) {
 823     StringRef Str = ConsumeSigned[i].Str;
 824     bool S8Success = Str.consumeInteger(0, S8);
 825     if (static_cast<int8_t>(ConsumeSigned[i].Expected) ==
 826         ConsumeSigned[i].Expected) {
 827       ASSERT_FALSE(S8Success);
 828       EXPECT_EQ(S8, ConsumeSigned[i].Expected);
 829       EXPECT_EQ(Str, ConsumeSigned[i].Leftover);
 830     } else {
 831       ASSERT_TRUE(S8Success);
 832     }
 833
 834     Str = ConsumeSigned[i].Str;
 835     bool S16Success = Str.consumeInteger(0, S16);
 836     if (static_cast<int16_t>(ConsumeSigned[i].Expected) ==
 837         ConsumeSigned[i].Expected) {
 838       ASSERT_FALSE(S16Success);
 839       EXPECT_EQ(S16, ConsumeSigned[i].Expected);
 840       EXPECT_EQ(Str, ConsumeSigned[i].Leftover);
 841     } else {
 842       ASSERT_TRUE(S16Success);
 843     }
 844
 845     Str = ConsumeSigned[i].Str;
 846     bool S32Success = Str.consumeInteger(0, S32);
 847     if (static_cast<int32_t>(ConsumeSigned[i].Expected) ==
 848         ConsumeSigned[i].Expected) {
 849       ASSERT_FALSE(S32Success);
 850       EXPECT_EQ(S32, ConsumeSigned[i].Expected);
 851       EXPECT_EQ(Str, ConsumeSigned[i].Leftover);
 852     } else {
 853       ASSERT_TRUE(S32Success);
 854     }
 855
 856     Str = ConsumeSigned[i].Str;
 857     bool S64Success = Str.consumeInteger(0, S64);
 858     if (static_cast<int64_t>(ConsumeSigned[i].Expected) ==
 859         ConsumeSigned[i].Expected) {
 860       ASSERT_FALSE(S64Success);
 861       EXPECT_EQ(S64, ConsumeSigned[i].Expected);
 862       EXPECT_EQ(Str, ConsumeSigned[i].Leftover);
 863     } else {
 864       ASSERT_TRUE(S64Success);
 865     }
 866   }
 867 }
 868
 869 struct GetDoubleStrings {
 870   const char *Str;
 871   bool AllowInexact;
 872   bool ShouldFail;
 873   double D;
 874 } DoubleStrings[] = {{"0", false, false, 0.0},
 875                      {"0.0", false, false, 0.0},
 876                      {"-0.0", false, false, -0.0},
 877                      {"123.45", false, true, 123.45},
 878                      {"123.45", true, false, 123.45}};
 879
 880 TEST(StringRefTest, getAsDouble) {
 881   for (const auto &Entry : DoubleStrings) {
 882     double Result;
 883     StringRef S(Entry.Str);
 884     EXPECT_EQ(Entry.ShouldFail, S.getAsDouble(Result, Entry.AllowInexact));
 885     if (!Entry.ShouldFail) {
 886       EXPECT_EQ(Result, Entry.D);
 887     }
 888   }
 889 }
 890
 891 static const char *join_input[] = { "a", "b", "c" };
 892 static const char join_result1[] = "a";
 893 static const char join_result2[] = "a:b:c";
 894 static const char join_result3[] = "a::b::c";
 895
 896 TEST(StringRefTest, joinStrings) {
 897   std::vector<StringRef> v1;
 898   std::vector<std::string> v2;
 899   for (size_t i = 0; i < array_lengthof(join_input); ++i) {
 900     v1.push_back(join_input[i]);
 901     v2.push_back(join_input[i]);
 902   }
 903
 904   bool v1_join1 = join(v1.begin(), v1.begin() + 1, ":") == join_result1;
 905   EXPECT_TRUE(v1_join1);
 906   bool v1_join2 = join(v1.begin(), v1.end(), ":") == join_result2;
 907   EXPECT_TRUE(v1_join2);
 908   bool v1_join3 = join(v1.begin(), v1.end(), "::") == join_result3;
 909   EXPECT_TRUE(v1_join3);
 910
 911   bool v2_join1 = join(v2.begin(), v2.begin() + 1, ":") == join_result1;
 912   EXPECT_TRUE(v2_join1);
 913   bool v2_join2 = join(v2.begin(), v2.end(), ":") == join_result2;
 914   EXPECT_TRUE(v2_join2);
 915   bool v2_join3 = join(v2.begin(), v2.end(), "::") == join_result3;
 916   EXPECT_TRUE(v2_join3);
 917   v2_join3 = join(v2, "::") == join_result3;
 918   EXPECT_TRUE(v2_join3);
 919 }
 920
 921
 922 TEST(StringRefTest, AllocatorCopy) {
 923   BumpPtrAllocator Alloc;
 924   // First test empty strings.  We don't want these to allocate anything on the
 925   // allocator.
 926   StringRef StrEmpty = "";
 927   StringRef StrEmptyc = StrEmpty.copy(Alloc);
 928   EXPECT_TRUE(StrEmpty.equals(StrEmptyc));
 929   EXPECT_EQ(StrEmptyc.data(), nullptr);
 930   EXPECT_EQ(StrEmptyc.size(), 0u);
 931   EXPECT_EQ(Alloc.getTotalMemory(), 0u);
 932
 933   StringRef Str1 = "hello";
 934   StringRef Str2 = "bye";
 935   StringRef Str1c = Str1.copy(Alloc);
 936   StringRef Str2c = Str2.copy(Alloc);
 937   EXPECT_TRUE(Str1.equals(Str1c));
 938   EXPECT_NE(Str1.data(), Str1c.data());
 939   EXPECT_TRUE(Str2.equals(Str2c));
 940   EXPECT_NE(Str2.data(), Str2c.data());
 941 }
 942
 943 TEST(StringRefTest, Drop) {
 944   StringRef Test("StringRefTest::Drop");
 945
 946   StringRef Dropped = Test.drop_front(5);
 947   EXPECT_EQ(Dropped, "gRefTest::Drop");
 948
 949   Dropped = Test.drop_back(5);
 950   EXPECT_EQ(Dropped, "StringRefTest:");
 951
 952   Dropped = Test.drop_front(0);
 953   EXPECT_EQ(Dropped, Test);
 954
 955   Dropped = Test.drop_back(0);
 956   EXPECT_EQ(Dropped, Test);
 957
 958   Dropped = Test.drop_front(Test.size());
 959   EXPECT_TRUE(Dropped.empty());
 960
 961   Dropped = Test.drop_back(Test.size());
 962   EXPECT_TRUE(Dropped.empty());
 963 }
 964
 965 TEST(StringRefTest, Take) {
 966   StringRef Test("StringRefTest::Take");
 967
 968   StringRef Taken = Test.take_front(5);
 969   EXPECT_EQ(Taken, "Strin");
 970
 971   Taken = Test.take_back(5);
 972   EXPECT_EQ(Taken, ":Take");
 973
 974   Taken = Test.take_front(Test.size());
 975   EXPECT_EQ(Taken, Test);
 976
 977   Taken = Test.take_back(Test.size());
 978   EXPECT_EQ(Taken, Test);
 979
 980   Taken = Test.take_front(0);
 981   EXPECT_TRUE(Taken.empty());
 982
 983   Taken = Test.take_back(0);
 984   EXPECT_TRUE(Taken.empty());
 985 }
 986
 987 TEST(StringRefTest, FindIf) {
 988   StringRef Punct("Test.String");
 989   StringRef NoPunct("ABCDEFG");
 990   StringRef Empty;
 991
 992   auto IsPunct = [](char c) { return ::ispunct(c); };
 993   auto IsAlpha = [](char c) { return ::isalpha(c); };
 994   EXPECT_EQ(4U, Punct.find_if(IsPunct));
 995   EXPECT_EQ(StringRef::npos, NoPunct.find_if(IsPunct));
 996   EXPECT_EQ(StringRef::npos, Empty.find_if(IsPunct));
 997
 998   EXPECT_EQ(4U, Punct.find_if_not(IsAlpha));
 999   EXPECT_EQ(StringRef::npos, NoPunct.find_if_not(IsAlpha));
1000   EXPECT_EQ(StringRef::npos, Empty.find_if_not(IsAlpha));
1001 }
1002
1003 TEST(StringRefTest, TakeWhileUntil) {
1004   StringRef Test("String With 1 Number");
1005
1006   StringRef Taken = Test.take_while([](char c) { return ::isdigit(c); });
1007   EXPECT_EQ("", Taken);
1008
1009   Taken = Test.take_until([](char c) { return ::isdigit(c); });
1010   EXPECT_EQ("String With ", Taken);
1011
1012   Taken = Test.take_while([](char c) { return true; });
1013   EXPECT_EQ(Test, Taken);
1014
1015   Taken = Test.take_until([](char c) { return true; });
1016   EXPECT_EQ("", Taken);
1017
1018   Test = "";
1019   Taken = Test.take_while([](char c) { return true; });
1020   EXPECT_EQ("", Taken);
1021 }
1022
1023 TEST(StringRefTest, DropWhileUntil) {
1024   StringRef Test("String With 1 Number");
1025
1026   StringRef Taken = Test.drop_while([](char c) { return ::isdigit(c); });
1027   EXPECT_EQ(Test, Taken);
1028
1029   Taken = Test.drop_until([](char c) { return ::isdigit(c); });
1030   EXPECT_EQ("1 Number", Taken);
1031
1032   Taken = Test.drop_while([](char c) { return true; });
1033   EXPECT_EQ("", Taken);
1034
1035   Taken = Test.drop_until([](char c) { return true; });
1036   EXPECT_EQ(Test, Taken);
1037
1038   StringRef EmptyString = "";
1039   Taken = EmptyString.drop_while([](char c) { return true; });
1040   EXPECT_EQ("", Taken);
1041 }
1042
1043 TEST(StringRefTest, StringLiteral) {
1044   constexpr StringLiteral Strings[] = {"Foo", "Bar"};
1045   EXPECT_EQ(StringRef("Foo"), Strings[0]);
1046   EXPECT_EQ(StringRef("Bar"), Strings[1]);
1047 }
1048
1049 } // end anonymous namespace