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 
operator <<(std::ostream & OS,const StringRef & S)22 std::ostream &operator<<(std::ostream &OS, const StringRef &S) {
23   OS << S.str();
24   return OS;
25 }
26 
operator <<(std::ostream & OS,const std::pair<StringRef,StringRef> & P)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 {
TEST(StringRefTest,Construction)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 
TEST(StringRefTest,EmptyInitializerList)71 TEST(StringRefTest, EmptyInitializerList) {
72   StringRef S = {};
73   EXPECT_TRUE(S.empty());
74 
75   S = {};
76   EXPECT_TRUE(S.empty());
77 }
78 
TEST(StringRefTest,Iteration)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 
TEST(StringRefTest,StringOps)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 
TEST(StringRefTest,Operators)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 
TEST(StringRefTest,Substr)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 
TEST(StringRefTest,Slice)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 
TEST(StringRefTest,Split)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   EXPECT_EQ(std::make_pair(StringRef("he"), StringRef("o")),
186 		    Str.rsplit("ll"));
187   EXPECT_EQ(std::make_pair(StringRef(""), StringRef("ello")),
188 		    Str.rsplit("h"));
189   EXPECT_EQ(std::make_pair(StringRef("hell"), StringRef("")),
190 	      Str.rsplit("o"));
191   EXPECT_EQ(std::make_pair(StringRef("hello"), StringRef("")),
192 		    Str.rsplit("::"));
193   EXPECT_EQ(std::make_pair(StringRef("hel"), StringRef("o")),
194 		    Str.rsplit("l"));
195 }
196 
TEST(StringRefTest,Split2)197 TEST(StringRefTest, Split2) {
198   SmallVector<StringRef, 5> parts;
199   SmallVector<StringRef, 5> expected;
200 
201   expected.push_back("ab"); expected.push_back("c");
202   StringRef(",ab,,c,").split(parts, ",", -1, false);
203   EXPECT_TRUE(parts == expected);
204 
205   expected.clear(); parts.clear();
206   expected.push_back(""); expected.push_back("ab"); expected.push_back("");
207   expected.push_back("c"); expected.push_back("");
208   StringRef(",ab,,c,").split(parts, ",", -1, true);
209   EXPECT_TRUE(parts == expected);
210 
211   expected.clear(); parts.clear();
212   expected.push_back("");
213   StringRef("").split(parts, ",", -1, true);
214   EXPECT_TRUE(parts == expected);
215 
216   expected.clear(); parts.clear();
217   StringRef("").split(parts, ",", -1, false);
218   EXPECT_TRUE(parts == expected);
219 
220   expected.clear(); parts.clear();
221   StringRef(",").split(parts, ",", -1, false);
222   EXPECT_TRUE(parts == expected);
223 
224   expected.clear(); parts.clear();
225   expected.push_back(""); expected.push_back("");
226   StringRef(",").split(parts, ",", -1, true);
227   EXPECT_TRUE(parts == expected);
228 
229   expected.clear(); parts.clear();
230   expected.push_back("a"); expected.push_back("b");
231   StringRef("a,b").split(parts, ",", -1, true);
232   EXPECT_TRUE(parts == expected);
233 
234   // Test MaxSplit
235   expected.clear(); parts.clear();
236   expected.push_back("a,,b,c");
237   StringRef("a,,b,c").split(parts, ",", 0, true);
238   EXPECT_TRUE(parts == expected);
239 
240   expected.clear(); parts.clear();
241   expected.push_back("a,,b,c");
242   StringRef("a,,b,c").split(parts, ",", 0, false);
243   EXPECT_TRUE(parts == expected);
244 
245   expected.clear(); parts.clear();
246   expected.push_back("a"); expected.push_back(",b,c");
247   StringRef("a,,b,c").split(parts, ",", 1, true);
248   EXPECT_TRUE(parts == expected);
249 
250   expected.clear(); parts.clear();
251   expected.push_back("a"); expected.push_back(",b,c");
252   StringRef("a,,b,c").split(parts, ",", 1, false);
253   EXPECT_TRUE(parts == expected);
254 
255   expected.clear(); parts.clear();
256   expected.push_back("a"); expected.push_back(""); expected.push_back("b,c");
257   StringRef("a,,b,c").split(parts, ",", 2, true);
258   EXPECT_TRUE(parts == expected);
259 
260   expected.clear(); parts.clear();
261   expected.push_back("a"); expected.push_back("b,c");
262   StringRef("a,,b,c").split(parts, ",", 2, false);
263   EXPECT_TRUE(parts == expected);
264 
265   expected.clear(); parts.clear();
266   expected.push_back("a"); expected.push_back(""); expected.push_back("b");
267   expected.push_back("c");
268   StringRef("a,,b,c").split(parts, ",", 3, true);
269   EXPECT_TRUE(parts == expected);
270 
271   expected.clear(); parts.clear();
272   expected.push_back("a"); expected.push_back("b"); expected.push_back("c");
273   StringRef("a,,b,c").split(parts, ",", 3, false);
274   EXPECT_TRUE(parts == expected);
275 
276   expected.clear(); parts.clear();
277   expected.push_back("a"); expected.push_back("b"); expected.push_back("c");
278   StringRef("a,,b,c").split(parts, ',', 3, false);
279   EXPECT_TRUE(parts == expected);
280 
281   expected.clear(); parts.clear();
282   expected.push_back("");
283   StringRef().split(parts, ",", 0, true);
284   EXPECT_TRUE(parts == expected);
285 
286   expected.clear(); parts.clear();
287   expected.push_back(StringRef());
288   StringRef("").split(parts, ",", 0, true);
289   EXPECT_TRUE(parts == expected);
290 
291   expected.clear(); parts.clear();
292   StringRef("").split(parts, ",", 0, false);
293   EXPECT_TRUE(parts == expected);
294   StringRef().split(parts, ",", 0, false);
295   EXPECT_TRUE(parts == expected);
296 
297   expected.clear(); parts.clear();
298   expected.push_back("a");
299   expected.push_back("");
300   expected.push_back("b");
301   expected.push_back("c,d");
302   StringRef("a,,b,c,d").split(parts, ",", 3, true);
303   EXPECT_TRUE(parts == expected);
304 
305   expected.clear(); parts.clear();
306   expected.push_back("");
307   StringRef().split(parts, ',', 0, true);
308   EXPECT_TRUE(parts == expected);
309 
310   expected.clear(); parts.clear();
311   expected.push_back(StringRef());
312   StringRef("").split(parts, ',', 0, true);
313   EXPECT_TRUE(parts == expected);
314 
315   expected.clear(); parts.clear();
316   StringRef("").split(parts, ',', 0, false);
317   EXPECT_TRUE(parts == expected);
318   StringRef().split(parts, ',', 0, false);
319   EXPECT_TRUE(parts == expected);
320 
321   expected.clear(); parts.clear();
322   expected.push_back("a");
323   expected.push_back("");
324   expected.push_back("b");
325   expected.push_back("c,d");
326   StringRef("a,,b,c,d").split(parts, ',', 3, true);
327   EXPECT_TRUE(parts == expected);
328 }
329 
TEST(StringRefTest,Trim)330 TEST(StringRefTest, Trim) {
331   StringRef Str0("hello");
332   StringRef Str1(" hello ");
333   StringRef Str2("  hello  ");
334 
335   EXPECT_EQ(StringRef("hello"), Str0.rtrim());
336   EXPECT_EQ(StringRef(" hello"), Str1.rtrim());
337   EXPECT_EQ(StringRef("  hello"), Str2.rtrim());
338   EXPECT_EQ(StringRef("hello"), Str0.ltrim());
339   EXPECT_EQ(StringRef("hello "), Str1.ltrim());
340   EXPECT_EQ(StringRef("hello  "), Str2.ltrim());
341   EXPECT_EQ(StringRef("hello"), Str0.trim());
342   EXPECT_EQ(StringRef("hello"), Str1.trim());
343   EXPECT_EQ(StringRef("hello"), Str2.trim());
344 
345   EXPECT_EQ(StringRef("ello"), Str0.trim("hhhhhhhhhhh"));
346 
347   EXPECT_EQ(StringRef(""), StringRef("").trim());
348   EXPECT_EQ(StringRef(""), StringRef(" ").trim());
349   EXPECT_EQ(StringRef("\0", 1), StringRef(" \0 ", 3).trim());
350   EXPECT_EQ(StringRef("\0\0", 2), StringRef("\0\0", 2).trim());
351   EXPECT_EQ(StringRef("x"), StringRef("\0\0x\0\0", 5).trim('\0'));
352 }
353 
TEST(StringRefTest,StartsWith)354 TEST(StringRefTest, StartsWith) {
355   StringRef Str("hello");
356   EXPECT_TRUE(Str.startswith(""));
357   EXPECT_TRUE(Str.startswith("he"));
358   EXPECT_FALSE(Str.startswith("helloworld"));
359   EXPECT_FALSE(Str.startswith("hi"));
360 }
361 
TEST(StringRefTest,StartsWithLower)362 TEST(StringRefTest, StartsWithLower) {
363   StringRef Str("heLLo");
364   EXPECT_TRUE(Str.startswith_lower(""));
365   EXPECT_TRUE(Str.startswith_lower("he"));
366   EXPECT_TRUE(Str.startswith_lower("hell"));
367   EXPECT_TRUE(Str.startswith_lower("HELlo"));
368   EXPECT_FALSE(Str.startswith_lower("helloworld"));
369   EXPECT_FALSE(Str.startswith_lower("hi"));
370 }
371 
TEST(StringRefTest,ConsumeFront)372 TEST(StringRefTest, ConsumeFront) {
373   StringRef Str("hello");
374   EXPECT_TRUE(Str.consume_front(""));
375   EXPECT_EQ("hello", Str);
376   EXPECT_TRUE(Str.consume_front("he"));
377   EXPECT_EQ("llo", Str);
378   EXPECT_FALSE(Str.consume_front("lloworld"));
379   EXPECT_EQ("llo", Str);
380   EXPECT_FALSE(Str.consume_front("lol"));
381   EXPECT_EQ("llo", Str);
382   EXPECT_TRUE(Str.consume_front("llo"));
383   EXPECT_EQ("", Str);
384   EXPECT_FALSE(Str.consume_front("o"));
385   EXPECT_TRUE(Str.consume_front(""));
386 }
387 
TEST(StringRefTest,EndsWith)388 TEST(StringRefTest, EndsWith) {
389   StringRef Str("hello");
390   EXPECT_TRUE(Str.endswith(""));
391   EXPECT_TRUE(Str.endswith("lo"));
392   EXPECT_FALSE(Str.endswith("helloworld"));
393   EXPECT_FALSE(Str.endswith("worldhello"));
394   EXPECT_FALSE(Str.endswith("so"));
395 }
396 
TEST(StringRefTest,EndsWithLower)397 TEST(StringRefTest, EndsWithLower) {
398   StringRef Str("heLLo");
399   EXPECT_TRUE(Str.endswith_lower(""));
400   EXPECT_TRUE(Str.endswith_lower("lo"));
401   EXPECT_TRUE(Str.endswith_lower("LO"));
402   EXPECT_TRUE(Str.endswith_lower("ELlo"));
403   EXPECT_FALSE(Str.endswith_lower("helloworld"));
404   EXPECT_FALSE(Str.endswith_lower("hi"));
405 }
406 
TEST(StringRefTest,ConsumeBack)407 TEST(StringRefTest, ConsumeBack) {
408   StringRef Str("hello");
409   EXPECT_TRUE(Str.consume_back(""));
410   EXPECT_EQ("hello", Str);
411   EXPECT_TRUE(Str.consume_back("lo"));
412   EXPECT_EQ("hel", Str);
413   EXPECT_FALSE(Str.consume_back("helhel"));
414   EXPECT_EQ("hel", Str);
415   EXPECT_FALSE(Str.consume_back("hle"));
416   EXPECT_EQ("hel", Str);
417   EXPECT_TRUE(Str.consume_back("hel"));
418   EXPECT_EQ("", Str);
419   EXPECT_FALSE(Str.consume_back("h"));
420   EXPECT_TRUE(Str.consume_back(""));
421 }
422 
TEST(StringRefTest,Find)423 TEST(StringRefTest, Find) {
424   StringRef Str("helloHELLO");
425   StringRef LongStr("hellx xello hell ello world foo bar hello HELLO");
426 
427   struct {
428     StringRef Str;
429     char C;
430     std::size_t From;
431     std::size_t Pos;
432     std::size_t LowerPos;
433   } CharExpectations[] = {
434       {Str, 'h', 0U, 0U, 0U},
435       {Str, 'e', 0U, 1U, 1U},
436       {Str, 'l', 0U, 2U, 2U},
437       {Str, 'l', 3U, 3U, 3U},
438       {Str, 'o', 0U, 4U, 4U},
439       {Str, 'L', 0U, 7U, 2U},
440       {Str, 'z', 0U, StringRef::npos, StringRef::npos},
441   };
442 
443   struct {
444     StringRef Str;
445     llvm::StringRef S;
446     std::size_t From;
447     std::size_t Pos;
448     std::size_t LowerPos;
449   } StrExpectations[] = {
450       {Str, "helloword", 0, StringRef::npos, StringRef::npos},
451       {Str, "hello", 0, 0U, 0U},
452       {Str, "ello", 0, 1U, 1U},
453       {Str, "zz", 0, StringRef::npos, StringRef::npos},
454       {Str, "ll", 2U, 2U, 2U},
455       {Str, "ll", 3U, StringRef::npos, 7U},
456       {Str, "LL", 2U, 7U, 2U},
457       {Str, "LL", 3U, 7U, 7U},
458       {Str, "", 0U, 0U, 0U},
459       {LongStr, "hello", 0U, 36U, 36U},
460       {LongStr, "foo", 0U, 28U, 28U},
461       {LongStr, "hell", 2U, 12U, 12U},
462       {LongStr, "HELL", 2U, 42U, 12U},
463       {LongStr, "", 0U, 0U, 0U}};
464 
465   for (auto &E : CharExpectations) {
466     EXPECT_EQ(E.Pos, E.Str.find(E.C, E.From));
467     EXPECT_EQ(E.LowerPos, E.Str.find_lower(E.C, E.From));
468     EXPECT_EQ(E.LowerPos, E.Str.find_lower(toupper(E.C), E.From));
469   }
470 
471   for (auto &E : StrExpectations) {
472     EXPECT_EQ(E.Pos, E.Str.find(E.S, E.From));
473     EXPECT_EQ(E.LowerPos, E.Str.find_lower(E.S, E.From));
474     EXPECT_EQ(E.LowerPos, E.Str.find_lower(E.S.upper(), E.From));
475   }
476 
477   EXPECT_EQ(3U, Str.rfind('l'));
478   EXPECT_EQ(StringRef::npos, Str.rfind('z'));
479   EXPECT_EQ(StringRef::npos, Str.rfind("helloworld"));
480   EXPECT_EQ(0U, Str.rfind("hello"));
481   EXPECT_EQ(1U, Str.rfind("ello"));
482   EXPECT_EQ(StringRef::npos, Str.rfind("zz"));
483 
484   EXPECT_EQ(8U, Str.rfind_lower('l'));
485   EXPECT_EQ(8U, Str.rfind_lower('L'));
486   EXPECT_EQ(StringRef::npos, Str.rfind_lower('z'));
487   EXPECT_EQ(StringRef::npos, Str.rfind_lower("HELLOWORLD"));
488   EXPECT_EQ(5U, Str.rfind("HELLO"));
489   EXPECT_EQ(6U, Str.rfind("ELLO"));
490   EXPECT_EQ(StringRef::npos, Str.rfind("ZZ"));
491 
492   EXPECT_EQ(2U, Str.find_first_of('l'));
493   EXPECT_EQ(1U, Str.find_first_of("el"));
494   EXPECT_EQ(StringRef::npos, Str.find_first_of("xyz"));
495 
496   Str = "hello";
497   EXPECT_EQ(1U, Str.find_first_not_of('h'));
498   EXPECT_EQ(4U, Str.find_first_not_of("hel"));
499   EXPECT_EQ(StringRef::npos, Str.find_first_not_of("hello"));
500 
501   EXPECT_EQ(3U, Str.find_last_not_of('o'));
502   EXPECT_EQ(1U, Str.find_last_not_of("lo"));
503   EXPECT_EQ(StringRef::npos, Str.find_last_not_of("helo"));
504 }
505 
TEST(StringRefTest,Count)506 TEST(StringRefTest, Count) {
507   StringRef Str("hello");
508   EXPECT_EQ(2U, Str.count('l'));
509   EXPECT_EQ(1U, Str.count('o'));
510   EXPECT_EQ(0U, Str.count('z'));
511   EXPECT_EQ(0U, Str.count("helloworld"));
512   EXPECT_EQ(1U, Str.count("hello"));
513   EXPECT_EQ(1U, Str.count("ello"));
514   EXPECT_EQ(0U, Str.count("zz"));
515 }
516 
TEST(StringRefTest,EditDistance)517 TEST(StringRefTest, EditDistance) {
518   StringRef Hello("hello");
519   EXPECT_EQ(2U, Hello.edit_distance("hill"));
520 
521   StringRef Industry("industry");
522   EXPECT_EQ(6U, Industry.edit_distance("interest"));
523 
524   StringRef Soylent("soylent green is people");
525   EXPECT_EQ(19U, Soylent.edit_distance("people soiled our green"));
526   EXPECT_EQ(26U, Soylent.edit_distance("people soiled our green",
527                                       /* allow replacements = */ false));
528   EXPECT_EQ(9U, Soylent.edit_distance("people soiled our green",
529                                       /* allow replacements = */ true,
530                                       /* max edit distance = */ 8));
531   EXPECT_EQ(53U, Soylent.edit_distance("people soiled our green "
532                                        "people soiled our green "
533                                        "people soiled our green "));
534 }
535 
TEST(StringRefTest,Misc)536 TEST(StringRefTest, Misc) {
537   std::string Storage;
538   raw_string_ostream OS(Storage);
539   OS << StringRef("hello");
540   EXPECT_EQ("hello", OS.str());
541 }
542 
TEST(StringRefTest,Hashing)543 TEST(StringRefTest, Hashing) {
544   EXPECT_EQ(hash_value(std::string()), hash_value(StringRef()));
545   EXPECT_EQ(hash_value(std::string()), hash_value(StringRef("")));
546   std::string S = "hello world";
547   hash_code H = hash_value(S);
548   EXPECT_EQ(H, hash_value(StringRef("hello world")));
549   EXPECT_EQ(H, hash_value(StringRef(S)));
550   EXPECT_NE(H, hash_value(StringRef("hello worl")));
551   EXPECT_EQ(hash_value(std::string("hello worl")),
552             hash_value(StringRef("hello worl")));
553   EXPECT_NE(H, hash_value(StringRef("hello world ")));
554   EXPECT_EQ(hash_value(std::string("hello world ")),
555             hash_value(StringRef("hello world ")));
556   EXPECT_EQ(H, hash_value(StringRef("hello world\0")));
557   EXPECT_NE(hash_value(std::string("ello worl")),
558             hash_value(StringRef("hello world").slice(1, -1)));
559 }
560 
561 struct UnsignedPair {
562   const char *Str;
563   uint64_t Expected;
564 } Unsigned[] =
565   { {"0", 0}
566   , {"255", 255}
567   , {"256", 256}
568   , {"65535", 65535}
569   , {"65536", 65536}
570   , {"4294967295", 4294967295ULL}
571   , {"4294967296", 4294967296ULL}
572   , {"18446744073709551615", 18446744073709551615ULL}
573   , {"042", 34}
574   , {"0x42", 66}
575   , {"0b101010", 42}
576   };
577 
578 struct SignedPair {
579   const char *Str;
580   int64_t Expected;
581 } Signed[] =
582   { {"0", 0}
583   , {"-0", 0}
584   , {"127", 127}
585   , {"128", 128}
586   , {"-128", -128}
587   , {"-129", -129}
588   , {"32767", 32767}
589   , {"32768", 32768}
590   , {"-32768", -32768}
591   , {"-32769", -32769}
592   , {"2147483647", 2147483647LL}
593   , {"2147483648", 2147483648LL}
594   , {"-2147483648", -2147483648LL}
595   , {"-2147483649", -2147483649LL}
596   , {"-9223372036854775808", -(9223372036854775807LL) - 1}
597   , {"042", 34}
598   , {"0x42", 66}
599   , {"0b101010", 42}
600   , {"-042", -34}
601   , {"-0x42", -66}
602   , {"-0b101010", -42}
603   };
604 
TEST(StringRefTest,getAsInteger)605 TEST(StringRefTest, getAsInteger) {
606   uint8_t U8;
607   uint16_t U16;
608   uint32_t U32;
609   uint64_t U64;
610 
611   for (size_t i = 0; i < array_lengthof(Unsigned); ++i) {
612     bool U8Success = StringRef(Unsigned[i].Str).getAsInteger(0, U8);
613     if (static_cast<uint8_t>(Unsigned[i].Expected) == Unsigned[i].Expected) {
614       ASSERT_FALSE(U8Success);
615       EXPECT_EQ(U8, Unsigned[i].Expected);
616     } else {
617       ASSERT_TRUE(U8Success);
618     }
619     bool U16Success = StringRef(Unsigned[i].Str).getAsInteger(0, U16);
620     if (static_cast<uint16_t>(Unsigned[i].Expected) == Unsigned[i].Expected) {
621       ASSERT_FALSE(U16Success);
622       EXPECT_EQ(U16, Unsigned[i].Expected);
623     } else {
624       ASSERT_TRUE(U16Success);
625     }
626     bool U32Success = StringRef(Unsigned[i].Str).getAsInteger(0, U32);
627     if (static_cast<uint32_t>(Unsigned[i].Expected) == Unsigned[i].Expected) {
628       ASSERT_FALSE(U32Success);
629       EXPECT_EQ(U32, Unsigned[i].Expected);
630     } else {
631       ASSERT_TRUE(U32Success);
632     }
633     bool U64Success = StringRef(Unsigned[i].Str).getAsInteger(0, U64);
634     if (static_cast<uint64_t>(Unsigned[i].Expected) == Unsigned[i].Expected) {
635       ASSERT_FALSE(U64Success);
636       EXPECT_EQ(U64, Unsigned[i].Expected);
637     } else {
638       ASSERT_TRUE(U64Success);
639     }
640   }
641 
642   int8_t S8;
643   int16_t S16;
644   int32_t S32;
645   int64_t S64;
646 
647   for (size_t i = 0; i < array_lengthof(Signed); ++i) {
648     bool S8Success = StringRef(Signed[i].Str).getAsInteger(0, S8);
649     if (static_cast<int8_t>(Signed[i].Expected) == Signed[i].Expected) {
650       ASSERT_FALSE(S8Success);
651       EXPECT_EQ(S8, Signed[i].Expected);
652     } else {
653       ASSERT_TRUE(S8Success);
654     }
655     bool S16Success = StringRef(Signed[i].Str).getAsInteger(0, S16);
656     if (static_cast<int16_t>(Signed[i].Expected) == Signed[i].Expected) {
657       ASSERT_FALSE(S16Success);
658       EXPECT_EQ(S16, Signed[i].Expected);
659     } else {
660       ASSERT_TRUE(S16Success);
661     }
662     bool S32Success = StringRef(Signed[i].Str).getAsInteger(0, S32);
663     if (static_cast<int32_t>(Signed[i].Expected) == Signed[i].Expected) {
664       ASSERT_FALSE(S32Success);
665       EXPECT_EQ(S32, Signed[i].Expected);
666     } else {
667       ASSERT_TRUE(S32Success);
668     }
669     bool S64Success = StringRef(Signed[i].Str).getAsInteger(0, S64);
670     if (static_cast<int64_t>(Signed[i].Expected) == Signed[i].Expected) {
671       ASSERT_FALSE(S64Success);
672       EXPECT_EQ(S64, Signed[i].Expected);
673     } else {
674       ASSERT_TRUE(S64Success);
675     }
676   }
677 }
678 
679 
680 static const char* BadStrings[] = {
681     ""                      // empty string
682   , "18446744073709551617"  // value just over max
683   , "123456789012345678901" // value way too large
684   , "4t23v"                 // illegal decimal characters
685   , "0x123W56"              // illegal hex characters
686   , "0b2"                   // illegal bin characters
687   , "08"                    // illegal oct characters
688   , "0o8"                   // illegal oct characters
689   , "-123"                  // negative unsigned value
690   , "0x"
691   , "0b"
692 };
693 
694 
TEST(StringRefTest,getAsUnsignedIntegerBadStrings)695 TEST(StringRefTest, getAsUnsignedIntegerBadStrings) {
696   unsigned long long U64;
697   for (size_t i = 0; i < array_lengthof(BadStrings); ++i) {
698     bool IsBadNumber = StringRef(BadStrings[i]).getAsInteger(0, U64);
699     ASSERT_TRUE(IsBadNumber);
700   }
701 }
702 
703 struct ConsumeUnsignedPair {
704   const char *Str;
705   uint64_t Expected;
706   const char *Leftover;
707 } ConsumeUnsigned[] = {
708     {"0", 0, ""},
709     {"255", 255, ""},
710     {"256", 256, ""},
711     {"65535", 65535, ""},
712     {"65536", 65536, ""},
713     {"4294967295", 4294967295ULL, ""},
714     {"4294967296", 4294967296ULL, ""},
715     {"255A376", 255, "A376"},
716     {"18446744073709551615", 18446744073709551615ULL, ""},
717     {"18446744073709551615ABC", 18446744073709551615ULL, "ABC"},
718     {"042", 34, ""},
719     {"0x42", 66, ""},
720     {"0x42-0x34", 66, "-0x34"},
721     {"0b101010", 42, ""},
722     {"0429F", 042, "9F"},            // Auto-sensed octal radix, invalid digit
723     {"0x42G12", 0x42, "G12"},        // Auto-sensed hex radix, invalid digit
724     {"0b10101020101", 42, "20101"}}; // Auto-sensed binary radix, invalid digit.
725 
726 struct ConsumeSignedPair {
727   const char *Str;
728   int64_t Expected;
729   const char *Leftover;
730 } ConsumeSigned[] = {
731     {"0", 0, ""},
732     {"-0", 0, ""},
733     {"0-1", 0, "-1"},
734     {"-0-1", 0, "-1"},
735     {"127", 127, ""},
736     {"128", 128, ""},
737     {"127-1", 127, "-1"},
738     {"128-1", 128, "-1"},
739     {"-128", -128, ""},
740     {"-129", -129, ""},
741     {"-128-1", -128, "-1"},
742     {"-129-1", -129, "-1"},
743     {"32767", 32767, ""},
744     {"32768", 32768, ""},
745     {"32767-1", 32767, "-1"},
746     {"32768-1", 32768, "-1"},
747     {"-32768", -32768, ""},
748     {"-32769", -32769, ""},
749     {"-32768-1", -32768, "-1"},
750     {"-32769-1", -32769, "-1"},
751     {"2147483647", 2147483647LL, ""},
752     {"2147483648", 2147483648LL, ""},
753     {"2147483647-1", 2147483647LL, "-1"},
754     {"2147483648-1", 2147483648LL, "-1"},
755     {"-2147483648", -2147483648LL, ""},
756     {"-2147483649", -2147483649LL, ""},
757     {"-2147483648-1", -2147483648LL, "-1"},
758     {"-2147483649-1", -2147483649LL, "-1"},
759     {"-9223372036854775808", -(9223372036854775807LL) - 1, ""},
760     {"-9223372036854775808-1", -(9223372036854775807LL) - 1, "-1"},
761     {"042", 34, ""},
762     {"042-1", 34, "-1"},
763     {"0x42", 66, ""},
764     {"0x42-1", 66, "-1"},
765     {"0b101010", 42, ""},
766     {"0b101010-1", 42, "-1"},
767     {"-042", -34, ""},
768     {"-042-1", -34, "-1"},
769     {"-0x42", -66, ""},
770     {"-0x42-1", -66, "-1"},
771     {"-0b101010", -42, ""},
772     {"-0b101010-1", -42, "-1"}};
773 
TEST(StringRefTest,consumeIntegerUnsigned)774 TEST(StringRefTest, consumeIntegerUnsigned) {
775   uint8_t U8;
776   uint16_t U16;
777   uint32_t U32;
778   uint64_t U64;
779 
780   for (size_t i = 0; i < array_lengthof(ConsumeUnsigned); ++i) {
781     StringRef Str = ConsumeUnsigned[i].Str;
782     bool U8Success = Str.consumeInteger(0, U8);
783     if (static_cast<uint8_t>(ConsumeUnsigned[i].Expected) ==
784         ConsumeUnsigned[i].Expected) {
785       ASSERT_FALSE(U8Success);
786       EXPECT_EQ(U8, ConsumeUnsigned[i].Expected);
787       EXPECT_EQ(Str, ConsumeUnsigned[i].Leftover);
788     } else {
789       ASSERT_TRUE(U8Success);
790     }
791 
792     Str = ConsumeUnsigned[i].Str;
793     bool U16Success = Str.consumeInteger(0, U16);
794     if (static_cast<uint16_t>(ConsumeUnsigned[i].Expected) ==
795         ConsumeUnsigned[i].Expected) {
796       ASSERT_FALSE(U16Success);
797       EXPECT_EQ(U16, ConsumeUnsigned[i].Expected);
798       EXPECT_EQ(Str, ConsumeUnsigned[i].Leftover);
799     } else {
800       ASSERT_TRUE(U16Success);
801     }
802 
803     Str = ConsumeUnsigned[i].Str;
804     bool U32Success = Str.consumeInteger(0, U32);
805     if (static_cast<uint32_t>(ConsumeUnsigned[i].Expected) ==
806         ConsumeUnsigned[i].Expected) {
807       ASSERT_FALSE(U32Success);
808       EXPECT_EQ(U32, ConsumeUnsigned[i].Expected);
809       EXPECT_EQ(Str, ConsumeUnsigned[i].Leftover);
810     } else {
811       ASSERT_TRUE(U32Success);
812     }
813 
814     Str = ConsumeUnsigned[i].Str;
815     bool U64Success = Str.consumeInteger(0, U64);
816     if (static_cast<uint64_t>(ConsumeUnsigned[i].Expected) ==
817         ConsumeUnsigned[i].Expected) {
818       ASSERT_FALSE(U64Success);
819       EXPECT_EQ(U64, ConsumeUnsigned[i].Expected);
820       EXPECT_EQ(Str, ConsumeUnsigned[i].Leftover);
821     } else {
822       ASSERT_TRUE(U64Success);
823     }
824   }
825 }
826 
TEST(StringRefTest,consumeIntegerSigned)827 TEST(StringRefTest, consumeIntegerSigned) {
828   int8_t S8;
829   int16_t S16;
830   int32_t S32;
831   int64_t S64;
832 
833   for (size_t i = 0; i < array_lengthof(ConsumeSigned); ++i) {
834     StringRef Str = ConsumeSigned[i].Str;
835     bool S8Success = Str.consumeInteger(0, S8);
836     if (static_cast<int8_t>(ConsumeSigned[i].Expected) ==
837         ConsumeSigned[i].Expected) {
838       ASSERT_FALSE(S8Success);
839       EXPECT_EQ(S8, ConsumeSigned[i].Expected);
840       EXPECT_EQ(Str, ConsumeSigned[i].Leftover);
841     } else {
842       ASSERT_TRUE(S8Success);
843     }
844 
845     Str = ConsumeSigned[i].Str;
846     bool S16Success = Str.consumeInteger(0, S16);
847     if (static_cast<int16_t>(ConsumeSigned[i].Expected) ==
848         ConsumeSigned[i].Expected) {
849       ASSERT_FALSE(S16Success);
850       EXPECT_EQ(S16, ConsumeSigned[i].Expected);
851       EXPECT_EQ(Str, ConsumeSigned[i].Leftover);
852     } else {
853       ASSERT_TRUE(S16Success);
854     }
855 
856     Str = ConsumeSigned[i].Str;
857     bool S32Success = Str.consumeInteger(0, S32);
858     if (static_cast<int32_t>(ConsumeSigned[i].Expected) ==
859         ConsumeSigned[i].Expected) {
860       ASSERT_FALSE(S32Success);
861       EXPECT_EQ(S32, ConsumeSigned[i].Expected);
862       EXPECT_EQ(Str, ConsumeSigned[i].Leftover);
863     } else {
864       ASSERT_TRUE(S32Success);
865     }
866 
867     Str = ConsumeSigned[i].Str;
868     bool S64Success = Str.consumeInteger(0, S64);
869     if (static_cast<int64_t>(ConsumeSigned[i].Expected) ==
870         ConsumeSigned[i].Expected) {
871       ASSERT_FALSE(S64Success);
872       EXPECT_EQ(S64, ConsumeSigned[i].Expected);
873       EXPECT_EQ(Str, ConsumeSigned[i].Leftover);
874     } else {
875       ASSERT_TRUE(S64Success);
876     }
877   }
878 }
879 
880 struct GetDoubleStrings {
881   const char *Str;
882   bool AllowInexact;
883   bool ShouldFail;
884   double D;
885 } DoubleStrings[] = {{"0", false, false, 0.0},
886                      {"0.0", false, false, 0.0},
887                      {"-0.0", false, false, -0.0},
888                      {"123.45", false, true, 123.45},
889                      {"123.45", true, false, 123.45},
890                      {"1.8e308", true, false, std::numeric_limits<double>::infinity()},
891                      {"1.8e308", false, true, std::numeric_limits<double>::infinity()},
892                      {"0x0.0000000000001P-1023", false, true, 0.0},
893                      {"0x0.0000000000001P-1023", true, false, 0.0},
894                     };
895 
TEST(StringRefTest,getAsDouble)896 TEST(StringRefTest, getAsDouble) {
897   for (const auto &Entry : DoubleStrings) {
898     double Result;
899     StringRef S(Entry.Str);
900     EXPECT_EQ(Entry.ShouldFail, S.getAsDouble(Result, Entry.AllowInexact));
901     if (!Entry.ShouldFail) {
902       EXPECT_EQ(Result, Entry.D);
903     }
904   }
905 }
906 
907 static const char *join_input[] = { "a", "b", "c" };
908 static const char join_result1[] = "a";
909 static const char join_result2[] = "a:b:c";
910 static const char join_result3[] = "a::b::c";
911 
TEST(StringRefTest,joinStrings)912 TEST(StringRefTest, joinStrings) {
913   std::vector<StringRef> v1;
914   std::vector<std::string> v2;
915   for (size_t i = 0; i < array_lengthof(join_input); ++i) {
916     v1.push_back(join_input[i]);
917     v2.push_back(join_input[i]);
918   }
919 
920   bool v1_join1 = join(v1.begin(), v1.begin() + 1, ":") == join_result1;
921   EXPECT_TRUE(v1_join1);
922   bool v1_join2 = join(v1.begin(), v1.end(), ":") == join_result2;
923   EXPECT_TRUE(v1_join2);
924   bool v1_join3 = join(v1.begin(), v1.end(), "::") == join_result3;
925   EXPECT_TRUE(v1_join3);
926 
927   bool v2_join1 = join(v2.begin(), v2.begin() + 1, ":") == join_result1;
928   EXPECT_TRUE(v2_join1);
929   bool v2_join2 = join(v2.begin(), v2.end(), ":") == join_result2;
930   EXPECT_TRUE(v2_join2);
931   bool v2_join3 = join(v2.begin(), v2.end(), "::") == join_result3;
932   EXPECT_TRUE(v2_join3);
933   v2_join3 = join(v2, "::") == join_result3;
934   EXPECT_TRUE(v2_join3);
935 }
936 
937 
TEST(StringRefTest,AllocatorCopy)938 TEST(StringRefTest, AllocatorCopy) {
939   BumpPtrAllocator Alloc;
940   // First test empty strings.  We don't want these to allocate anything on the
941   // allocator.
942   StringRef StrEmpty = "";
943   StringRef StrEmptyc = StrEmpty.copy(Alloc);
944   EXPECT_TRUE(StrEmpty.equals(StrEmptyc));
945   EXPECT_EQ(StrEmptyc.data(), nullptr);
946   EXPECT_EQ(StrEmptyc.size(), 0u);
947   EXPECT_EQ(Alloc.getTotalMemory(), 0u);
948 
949   StringRef Str1 = "hello";
950   StringRef Str2 = "bye";
951   StringRef Str1c = Str1.copy(Alloc);
952   StringRef Str2c = Str2.copy(Alloc);
953   EXPECT_TRUE(Str1.equals(Str1c));
954   EXPECT_NE(Str1.data(), Str1c.data());
955   EXPECT_TRUE(Str2.equals(Str2c));
956   EXPECT_NE(Str2.data(), Str2c.data());
957 }
958 
TEST(StringRefTest,Drop)959 TEST(StringRefTest, Drop) {
960   StringRef Test("StringRefTest::Drop");
961 
962   StringRef Dropped = Test.drop_front(5);
963   EXPECT_EQ(Dropped, "gRefTest::Drop");
964 
965   Dropped = Test.drop_back(5);
966   EXPECT_EQ(Dropped, "StringRefTest:");
967 
968   Dropped = Test.drop_front(0);
969   EXPECT_EQ(Dropped, Test);
970 
971   Dropped = Test.drop_back(0);
972   EXPECT_EQ(Dropped, Test);
973 
974   Dropped = Test.drop_front(Test.size());
975   EXPECT_TRUE(Dropped.empty());
976 
977   Dropped = Test.drop_back(Test.size());
978   EXPECT_TRUE(Dropped.empty());
979 }
980 
TEST(StringRefTest,Take)981 TEST(StringRefTest, Take) {
982   StringRef Test("StringRefTest::Take");
983 
984   StringRef Taken = Test.take_front(5);
985   EXPECT_EQ(Taken, "Strin");
986 
987   Taken = Test.take_back(5);
988   EXPECT_EQ(Taken, ":Take");
989 
990   Taken = Test.take_front(Test.size());
991   EXPECT_EQ(Taken, Test);
992 
993   Taken = Test.take_back(Test.size());
994   EXPECT_EQ(Taken, Test);
995 
996   Taken = Test.take_front(0);
997   EXPECT_TRUE(Taken.empty());
998 
999   Taken = Test.take_back(0);
1000   EXPECT_TRUE(Taken.empty());
1001 }
1002 
TEST(StringRefTest,FindIf)1003 TEST(StringRefTest, FindIf) {
1004   StringRef Punct("Test.String");
1005   StringRef NoPunct("ABCDEFG");
1006   StringRef Empty;
1007 
1008   auto IsPunct = [](char c) { return ::ispunct(c); };
1009   auto IsAlpha = [](char c) { return ::isalpha(c); };
1010   EXPECT_EQ(4U, Punct.find_if(IsPunct));
1011   EXPECT_EQ(StringRef::npos, NoPunct.find_if(IsPunct));
1012   EXPECT_EQ(StringRef::npos, Empty.find_if(IsPunct));
1013 
1014   EXPECT_EQ(4U, Punct.find_if_not(IsAlpha));
1015   EXPECT_EQ(StringRef::npos, NoPunct.find_if_not(IsAlpha));
1016   EXPECT_EQ(StringRef::npos, Empty.find_if_not(IsAlpha));
1017 }
1018 
TEST(StringRefTest,TakeWhileUntil)1019 TEST(StringRefTest, TakeWhileUntil) {
1020   StringRef Test("String With 1 Number");
1021 
1022   StringRef Taken = Test.take_while([](char c) { return ::isdigit(c); });
1023   EXPECT_EQ("", Taken);
1024 
1025   Taken = Test.take_until([](char c) { return ::isdigit(c); });
1026   EXPECT_EQ("String With ", Taken);
1027 
1028   Taken = Test.take_while([](char c) { return true; });
1029   EXPECT_EQ(Test, Taken);
1030 
1031   Taken = Test.take_until([](char c) { return true; });
1032   EXPECT_EQ("", Taken);
1033 
1034   Test = "";
1035   Taken = Test.take_while([](char c) { return true; });
1036   EXPECT_EQ("", Taken);
1037 }
1038 
TEST(StringRefTest,DropWhileUntil)1039 TEST(StringRefTest, DropWhileUntil) {
1040   StringRef Test("String With 1 Number");
1041 
1042   StringRef Taken = Test.drop_while([](char c) { return ::isdigit(c); });
1043   EXPECT_EQ(Test, Taken);
1044 
1045   Taken = Test.drop_until([](char c) { return ::isdigit(c); });
1046   EXPECT_EQ("1 Number", Taken);
1047 
1048   Taken = Test.drop_while([](char c) { return true; });
1049   EXPECT_EQ("", Taken);
1050 
1051   Taken = Test.drop_until([](char c) { return true; });
1052   EXPECT_EQ(Test, Taken);
1053 
1054   StringRef EmptyString = "";
1055   Taken = EmptyString.drop_while([](char c) { return true; });
1056   EXPECT_EQ("", Taken);
1057 }
1058 
TEST(StringRefTest,StringLiteral)1059 TEST(StringRefTest, StringLiteral) {
1060   constexpr StringLiteral Strings[] = {"Foo", "Bar"};
1061   EXPECT_EQ(StringRef("Foo"), Strings[0]);
1062   EXPECT_EQ(StringRef("Bar"), Strings[1]);
1063 }
1064 
1065 } // end anonymous namespace
1066