2 * Copyright 2016 Facebook, Inc.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 #include <boost/lexical_cast.hpp>
18 #include <folly/Conv.h>
19 #include <folly/Foreach.h>
20 #include <gtest/gtest.h>
28 using namespace folly;
31 TEST(Conv, digits10) {
35 // first, some basic sniff tests
36 EXPECT_EQ( 1, digits10(0));
37 EXPECT_EQ( 1, digits10(1));
38 EXPECT_EQ( 1, digits10(9));
39 EXPECT_EQ( 2, digits10(10));
40 EXPECT_EQ( 2, digits10(99));
41 EXPECT_EQ( 3, digits10(100));
42 EXPECT_EQ( 3, digits10(999));
43 EXPECT_EQ( 4, digits10(1000));
44 EXPECT_EQ( 4, digits10(9999));
45 EXPECT_EQ(20, digits10(18446744073709551615ULL));
47 // try the first X nonnegatives.
48 // Covers some more cases of 2^p, 10^p
49 for (uint64_t i = 0; i < 100000; i++) {
50 snprintf(buffer, sizeof(buffer), "%" PRIu64, i);
51 EXPECT_EQ(strlen(buffer), digits10(i));
56 for (int p = 0; p < 64; p++) {
57 snprintf(buffer, sizeof(buffer), "%" PRIu64, power);
58 EXPECT_EQ(strlen(buffer), digits10(power));
59 snprintf(buffer, sizeof(buffer), "%" PRIu64, power - 1);
60 EXPECT_EQ(strlen(buffer), digits10(power - 1));
61 snprintf(buffer, sizeof(buffer), "%" PRIu64, power + 1);
62 EXPECT_EQ(strlen(buffer), digits10(power + 1));
68 for (int p = 0; p < 20; p++) {
69 snprintf(buffer, sizeof(buffer), "%" PRIu64, power);
70 EXPECT_EQ(strlen(buffer), digits10(power));
71 snprintf(buffer, sizeof(buffer), "%" PRIu64, power - 1);
72 EXPECT_EQ(strlen(buffer), digits10(power - 1));
73 snprintf(buffer, sizeof(buffer), "%" PRIu64, power + 1);
74 EXPECT_EQ(strlen(buffer), digits10(power + 1));
80 TEST(Conv, Type2Type) {
82 EXPECT_EQ(to<bool>(boolV), true);
85 EXPECT_EQ(to<int>(intV), 42);
88 EXPECT_EQ(to<float>(floatV), 4.2f);
90 double doubleV = 0.42;
91 EXPECT_EQ(to<double>(doubleV), 0.42);
93 std::string stringV = "StdString";
94 EXPECT_EQ(to<std::string>(stringV), "StdString");
96 folly::fbstring fbStrV = "FBString";
97 EXPECT_EQ(to<folly::fbstring>(fbStrV), "FBString");
99 folly::StringPiece spV("StringPiece");
100 EXPECT_EQ(to<folly::StringPiece>(spV), "StringPiece");
103 EXPECT_EQ(to<bool>(true), true);
104 EXPECT_EQ(to<int>(42), 42);
105 EXPECT_EQ(to<float>(4.2f), 4.2f);
106 EXPECT_EQ(to<double>(.42), .42);
107 EXPECT_EQ(to<std::string>(std::string("Hello")), "Hello");
108 EXPECT_EQ(to<folly::fbstring>(folly::fbstring("hello")), "hello");
109 EXPECT_EQ(to<folly::StringPiece>(folly::StringPiece("Forty Two")),
113 TEST(Conv, Integral2Integral) {
114 // Same size, different signs
115 int64_t s64 = numeric_limits<uint8_t>::max();
116 EXPECT_EQ(to<uint8_t>(s64), s64);
118 s64 = numeric_limits<int8_t>::max();
119 EXPECT_EQ(to<int8_t>(s64), s64);
122 TEST(Conv, Floating2Floating) {
124 double d1 = to<double>(f1);
128 auto f2 = to<float>(d2);
129 EXPECT_EQ(double(f2), d2);
131 double invalidFloat = std::numeric_limits<double>::max();
132 EXPECT_ANY_THROW(to<float>(invalidFloat));
133 invalidFloat = -std::numeric_limits<double>::max();
134 EXPECT_ANY_THROW(to<float>(invalidFloat));
137 auto shouldWork = to<float>(std::numeric_limits<double>::min());
138 // The value of `shouldWork' is an implementation defined choice
139 // between the following two alternatives.
140 EXPECT_TRUE(shouldWork == std::numeric_limits<float>::min() ||
147 template <class String>
148 void testIntegral2String() {
151 template <class String, class Int, class... Ints>
152 void testIntegral2String() {
153 typedef typename make_unsigned<Int>::type Uint;
154 typedef typename make_signed<Int>::type Sint;
157 EXPECT_EQ(to<String>(value), "123");
159 EXPECT_EQ(to<String>(svalue), "123");
161 EXPECT_EQ(to<String>(svalue), "-123");
163 value = numeric_limits<Uint>::min();
164 EXPECT_EQ(to<Uint>(to<String>(value)), value);
165 value = numeric_limits<Uint>::max();
166 EXPECT_EQ(to<Uint>(to<String>(value)), value);
168 svalue = numeric_limits<Sint>::min();
169 EXPECT_EQ(to<Sint>(to<String>(svalue)), svalue);
170 value = numeric_limits<Sint>::max();
171 EXPECT_EQ(to<Sint>(to<String>(svalue)), svalue);
173 testIntegral2String<String, Ints...>();
176 #if FOLLY_HAVE_INT128_T
177 template <class String>
178 void test128Bit2String() {
179 typedef unsigned __int128 Uint;
180 typedef __int128 Sint;
182 EXPECT_EQ(detail::digitsEnough<unsigned __int128>(), 39);
185 EXPECT_EQ(to<String>(value), "123");
187 EXPECT_EQ(to<String>(svalue), "123");
189 EXPECT_EQ(to<String>(svalue), "-123");
191 value = __int128(1) << 64;
192 EXPECT_EQ(to<String>(value), "18446744073709551616");
194 svalue = -(__int128(1) << 64);
195 EXPECT_EQ(to<String>(svalue), "-18446744073709551616");
198 EXPECT_EQ(to<String>(value), "0");
201 EXPECT_EQ(to<String>(svalue), "0");
203 value = ~__int128(0);
204 EXPECT_EQ(to<String>(value), "340282366920938463463374607431768211455");
206 svalue = -(Uint(1) << 127);
207 EXPECT_EQ(to<String>(svalue), "-170141183460469231731687303715884105728");
209 svalue = (Uint(1) << 127) - 1;
210 EXPECT_EQ(to<String>(svalue), "170141183460469231731687303715884105727");
212 // TODO: the following do not compile to<__int128> ...
215 value = numeric_limits<Uint>::min();
216 EXPECT_EQ(to<Uint>(to<String>(value)), value);
217 value = numeric_limits<Uint>::max();
218 EXPECT_EQ(to<Uint>(to<String>(value)), value);
220 svalue = numeric_limits<Sint>::min();
221 EXPECT_EQ(to<Sint>(to<String>(svalue)), svalue);
222 value = numeric_limits<Sint>::max();
223 EXPECT_EQ(to<Sint>(to<String>(svalue)), svalue);
229 TEST(Conv, Integral2String) {
230 testIntegral2String<std::string, int8_t, int16_t, int32_t, int64_t>();
231 testIntegral2String<fbstring, int8_t, int16_t, int32_t, int64_t>();
233 #if FOLLY_HAVE_INT128_T
234 test128Bit2String<std::string>();
235 test128Bit2String<fbstring>();
239 template <class String>
240 void testString2Integral() {
243 template <class String, class Int, class... Ints>
244 void testString2Integral() {
245 typedef typename make_unsigned<Int>::type Uint;
246 typedef typename make_signed<Int>::type Sint;
248 // Unsigned numbers small enough to fit in a signed type
249 static const String strings[] = {
256 "0000000000000000000000000042"
258 static const Uint values[] = {
267 FOR_EACH_RANGE (i, 0, sizeof(strings) / sizeof(*strings)) {
268 EXPECT_EQ(to<Uint>(strings[i]), values[i]);
269 EXPECT_EQ(to<Sint>(strings[i]), values[i]);
272 // Unsigned numbers that won't fit in the signed variation
273 static const String uStrings[] = {
278 static const Uint uValues[] = {
283 FOR_EACH_RANGE (i, 0, sizeof(uStrings)/sizeof(*uStrings)) {
284 EXPECT_EQ(to<Uint>(uStrings[i]), uValues[i]);
285 if (sizeof(Int) == 1) {
286 EXPECT_THROW(to<Sint>(uStrings[i]), std::range_error);
290 if (sizeof(Int) >= 4) {
291 static const String strings2[] = {
297 static const Uint values2[] = {
303 FOR_EACH_RANGE (i, 0, sizeof(strings2)/sizeof(*strings2)) {
304 EXPECT_EQ(to<Uint>(strings2[i]), values2[i]);
305 EXPECT_EQ(to<Sint>(strings2[i]), values2[i]);
308 static const String uStrings2[] = {
314 static const Uint uValues2[] = {
320 FOR_EACH_RANGE (i, 0, sizeof(uStrings2)/sizeof(uStrings2)) {
321 EXPECT_EQ(to<Uint>(uStrings2[i]), uValues2[i]);
322 if (sizeof(Int) == 4) {
323 EXPECT_THROW(to<Sint>(uStrings2[i]), std::range_error);
328 if (sizeof(Int) >= 8) {
329 static_assert(sizeof(Int) <= 8, "Now that would be interesting");
330 static const String strings3[] = {
334 "100000000000000000",
335 "9223372036854775807",
337 static const Uint values3[] = {
340 (Uint)25687346509278435ULL,
341 (Uint)100000000000000000ULL,
342 (Uint)9223372036854775807ULL,
344 FOR_EACH_RANGE (i, 0, sizeof(strings3)/sizeof(*strings3)) {
345 EXPECT_EQ(to<Uint>(strings3[i]), values3[i]);
346 EXPECT_EQ(to<Sint>(strings3[i]), values3[i]);
349 static const String uStrings3[] = {
350 "9223372036854775808",
351 "9987435987394857987",
352 "17873648761234698740",
353 "18446744073709551615",
355 static const Uint uValues3[] = {
356 (Uint)9223372036854775808ULL,
357 (Uint)9987435987394857987ULL,
358 (Uint)17873648761234698740ULL,
359 (Uint)18446744073709551615ULL,
361 FOR_EACH_RANGE (i, 0, sizeof(uStrings3)/sizeof(*uStrings3)) {
362 EXPECT_EQ(to<Uint>(uStrings3[i]), uValues3[i]);
363 if (sizeof(Int) == 8) {
364 EXPECT_THROW(to<Sint>(uStrings3[i]), std::range_error);
369 // Minimum possible negative values, and negative sign overflow
370 static const String strings4[] = {
374 "-9223372036854775808",
376 static const String strings5[] = {
380 "-9223372036854775809",
382 static const Sint values4[] = {
386 (Sint)(-9223372036854775807LL - 1),
388 FOR_EACH_RANGE (i, 0, sizeof(strings4)/sizeof(*strings4)) {
389 if (sizeof(Int) > std::pow(2, i)) {
390 EXPECT_EQ(values4[i], to<Sint>(strings4[i]));
391 EXPECT_EQ(values4[i] - 1, to<Sint>(strings5[i]));
392 } else if (sizeof(Int) == std::pow(2, i)) {
393 EXPECT_EQ(values4[i], to<Sint>(strings4[i]));
394 EXPECT_THROW(to<Sint>(strings5[i]), std::range_error);
396 EXPECT_THROW(to<Sint>(strings4[i]), std::range_error);
397 EXPECT_THROW(to<Sint>(strings5[i]), std::range_error);
401 // Bogus string values
402 static const String bogusStrings[] = {
409 "- 42", // whitespace is not allowed between the sign and the value
411 "12345678901234567890123456789",
413 for (const auto& str : bogusStrings) {
414 EXPECT_THROW(to<Sint>(str), std::range_error);
415 EXPECT_THROW(to<Uint>(str), std::range_error);
418 // A leading '+' character is only allowed when converting to signed types.
419 String posSign("+42");
420 EXPECT_EQ(42, to<Sint>(posSign));
421 EXPECT_THROW(to<Uint>(posSign), std::range_error);
423 testString2Integral<String, Ints...>();
426 TEST(Conv, String2Integral) {
427 testString2Integral<const char*, int8_t, int16_t, int32_t, int64_t>();
428 testString2Integral<std::string, int8_t, int16_t, int32_t, int64_t>();
429 testString2Integral<fbstring, int8_t, int16_t, int32_t, int64_t>();
431 // Testing the behavior of the StringPiece* API
432 // StringPiece* normally parses as much valid data as it can,
433 // and advances the StringPiece to the end of the valid data.
434 char buf1[] = "100foo";
435 StringPiece sp1(buf1);
436 EXPECT_EQ(100, to<uint8_t>(&sp1));
437 EXPECT_EQ(buf1 + 3, sp1.begin());
438 // However, if the next character would cause an overflow it throws a
439 // range_error rather than consuming only as much as it can without
441 char buf2[] = "1002";
442 StringPiece sp2(buf2);
443 EXPECT_THROW(to<uint8_t>(&sp2), std::range_error);
444 EXPECT_EQ(buf2, sp2.begin());
447 TEST(Conv, StringPiece2Integral) {
448 string s = " +123 hello world ";
450 EXPECT_EQ(to<int>(&sp), 123);
451 EXPECT_EQ(sp, " hello world ");
454 TEST(Conv, StringPieceAppend) {
457 StringPiece sp(s, 0, 3);
458 string result = to<string>(s, sp);
459 EXPECT_EQ(result, "foobarfoo");
462 StringPiece sp1(s, 0, 3);
463 StringPiece sp2(s, 3, 3);
464 string result = to<string>(sp1, sp2);
465 EXPECT_EQ(result, s);
469 TEST(Conv, BadStringToIntegral) {
470 // Note that leading spaces (e.g. " 1") are valid.
471 vector<string> v = { "a", "", " ", "\n", " a0", "abcdef", "1Z", "!#" };
473 EXPECT_THROW(to<int>(s), std::range_error) << "s=" << s;
477 template <class String>
478 void testIdenticalTo() {
479 String s("Yukkuri shiteitte ne!!!");
481 String result = to<String>(s);
482 EXPECT_EQ(result, s);
485 template <class String>
486 void testVariadicTo() {
489 toAppend("Lorem ipsum ", 1234, String(" dolor amet "), 567.89, '!', &s);
490 EXPECT_EQ(s, "Lorem ipsum 1234 dolor amet 567.89!");
493 EXPECT_TRUE(s.empty());
495 s = to<String>("Lorem ipsum ", nullptr, 1234, " dolor amet ", 567.89, '.');
496 EXPECT_EQ(s, "Lorem ipsum 1234 dolor amet 567.89.");
499 template <class String>
500 void testIdenticalToDelim() {
501 String s("Yukkuri shiteitte ne!!!");
503 String charDelim = toDelim<String>('$', s);
504 EXPECT_EQ(charDelim, s);
506 String strDelim = toDelim<String>(String(">_<"), s);
507 EXPECT_EQ(strDelim, s);
510 template <class String>
511 void testVariadicToDelim() {
513 toAppendDelim(":", &s);
515 ":", "Lorem ipsum ", 1234, String(" dolor amet "), 567.89, '!', &s);
516 EXPECT_EQ(s, "Lorem ipsum :1234: dolor amet :567.89:!");
518 s = toDelim<String>(':');
519 EXPECT_TRUE(s.empty());
522 ":", "Lorem ipsum ", nullptr, 1234, " dolor amet ", 567.89, '.');
523 EXPECT_EQ(s, "Lorem ipsum ::1234: dolor amet :567.89:.");
526 TEST(Conv, NullString) {
527 string s1 = to<string>((char *) nullptr);
528 EXPECT_TRUE(s1.empty());
529 fbstring s2 = to<fbstring>((char *) nullptr);
530 EXPECT_TRUE(s2.empty());
533 TEST(Conv, VariadicTo) {
534 testIdenticalTo<string>();
535 testIdenticalTo<fbstring>();
536 testVariadicTo<string>();
537 testVariadicTo<fbstring>();
540 TEST(Conv, VariadicToDelim) {
541 testIdenticalToDelim<string>();
542 testIdenticalToDelim<fbstring>();
543 testVariadicToDelim<string>();
544 testVariadicToDelim<fbstring>();
547 template <class String>
548 void testDoubleToString() {
549 EXPECT_EQ(to<string>(0.0), "0");
550 EXPECT_EQ(to<string>(0.5), "0.5");
551 EXPECT_EQ(to<string>(10.25), "10.25");
552 EXPECT_EQ(to<string>(1.123e10), "11230000000");
555 TEST(Conv, DoubleToString) {
556 testDoubleToString<string>();
557 testDoubleToString<fbstring>();
560 TEST(Conv, FBStringToString) {
562 string ret = to<string>(foo);
563 EXPECT_EQ(ret, "foo");
564 string ret2 = to<string>(foo, 2);
565 EXPECT_EQ(ret2, "foo2");
568 TEST(Conv, StringPieceToDouble) {
569 vector<tuple<const char*, const char*, double>> strs{
570 make_tuple("2134123.125 zorro", " zorro", 2134123.125),
571 make_tuple(" 2134123.125 zorro", " zorro", 2134123.125),
572 make_tuple(" 2134123.125 zorro", " zorro", 2134123.125),
573 make_tuple(" 2134123.125 zorro ", " zorro ", 2134123.125),
574 make_tuple("2134123.125zorro", "zorro", 2134123.125),
575 make_tuple("0 zorro", " zorro", 0.0),
576 make_tuple(" 0 zorro", " zorro", 0.0),
577 make_tuple(" 0 zorro", " zorro", 0.0),
578 make_tuple(" 0 zorro ", " zorro ", 0.0),
579 make_tuple("0zorro", "zorro", 0.0),
580 make_tuple("0.0 zorro", " zorro", 0.0),
581 make_tuple(" 0.0 zorro", " zorro", 0.0),
582 make_tuple(" 0.0 zorro", " zorro", 0.0),
583 make_tuple(" 0.0 zorro ", " zorro ", 0.0),
584 make_tuple("0.0zorro", "zorro", 0.0),
586 for (const auto& s : strs) {
587 StringPiece pc(get<0>(s));
588 EXPECT_EQ(get<2>(s), to<double>(&pc)) << "\"" << get<0>(s) << "\"";
589 EXPECT_EQ(get<1>(s), pc);
590 EXPECT_THROW(to<double>(StringPiece(get<0>(s))), std::range_error);
591 EXPECT_EQ(get<2>(s), to<double>(StringPiece(get<0>(s), pc.data())));
594 // Test NaN conversion
596 to<double>("not a number");
598 } catch (const std::range_error &) {
601 EXPECT_TRUE(std::isnan(to<double>("NaN")));
602 EXPECT_EQ(to<double>("inf"), numeric_limits<double>::infinity());
603 EXPECT_EQ(to<double>("infinity"), numeric_limits<double>::infinity());
604 EXPECT_THROW(to<double>("infinitX"), std::range_error);
605 EXPECT_EQ(to<double>("-inf"), -numeric_limits<double>::infinity());
606 EXPECT_EQ(to<double>("-infinity"), -numeric_limits<double>::infinity());
607 EXPECT_THROW(to<double>("-infinitX"), std::range_error);
610 TEST(Conv, EmptyStringToInt) {
617 } catch (const std::range_error &) {
621 TEST(Conv, CorruptedStringToInt) {
623 StringPiece pc(s.data(), s.data() + 1); // Only "-"
628 } catch (const std::range_error &) {
632 TEST(Conv, EmptyStringToDouble) {
639 } catch (const std::range_error &) {
643 TEST(Conv, IntToDouble) {
644 auto d = to<double>(42);
646 /* This seems not work in ubuntu11.10, gcc 4.6.1
648 auto f = to<float>(957837589847);
650 } catch (std::range_error& e) {
651 //LOG(INFO) << e.what();
656 TEST(Conv, DoubleToInt) {
657 auto i = to<int>(42.0);
660 auto i = to<int>(42.1);
661 LOG(ERROR) << "to<int> returned " << i << " instead of throwing";
663 } catch (std::range_error& e) {
664 //LOG(INFO) << e.what();
668 TEST(Conv, EnumToInt) {
669 enum A { x = 42, y = 420, z = 65 };
672 auto j = to<char>(x);
675 auto i = to<char>(y);
676 LOG(ERROR) << "to<char> returned "
677 << static_cast<unsigned int>(i)
678 << " instead of throwing";
680 } catch (std::range_error& e) {
681 //LOG(INFO) << e.what();
685 TEST(Conv, EnumToString) {
687 enum A { x = 4, y = 420, z = 65 };
688 EXPECT_EQ("foo.4", to<string>("foo.", x));
689 EXPECT_EQ("foo.420", to<string>("foo.", y));
690 EXPECT_EQ("foo.65", to<string>("foo.", z));
693 TEST(Conv, IntToEnum) {
694 enum A { x = 42, y = 420 };
700 auto i = to<A>(5000000000L);
701 LOG(ERROR) << "to<A> returned "
702 << static_cast<unsigned int>(i)
703 << " instead of throwing";
705 } catch (std::range_error& e) {
706 //LOG(INFO) << e.what();
710 TEST(Conv, UnsignedEnum) {
711 enum E : uint32_t { x = 3000000000U };
712 auto u = to<uint32_t>(x);
713 EXPECT_EQ(u, 3000000000U);
714 auto s = to<string>(x);
715 EXPECT_EQ("3000000000", s);
716 auto e = to<E>(3000000000U);
719 auto i = to<int32_t>(x);
720 LOG(ERROR) << "to<int32_t> returned " << i << " instead of throwing";
722 } catch (std::range_error& e) {
726 TEST(Conv, UnsignedEnumClass) {
727 enum class E : uint32_t { x = 3000000000U };
728 auto u = to<uint32_t>(E::x);
730 EXPECT_EQ(u, 3000000000U);
731 EXPECT_EQ("3000000000", to<string>(E::x));
732 EXPECT_EQ(E::x, to<E>(3000000000U));
733 EXPECT_EQ(E::x, to<E>("3000000000"));
735 parseTo("3000000000", e);
737 EXPECT_THROW(to<int32_t>(E::x), std::range_error);
740 // Multi-argument to<string> uses toAppend, a different code path than
742 TEST(Conv, EnumClassToString) {
743 enum class A { x = 4, y = 420, z = 65 };
744 EXPECT_EQ("foo.4", to<string>("foo.", A::x));
745 EXPECT_EQ("foo.420", to<string>("foo.", A::y));
746 EXPECT_EQ("foo.65", to<string>("foo.", A::z));
749 TEST(Conv, IntegralToBool) {
750 EXPECT_FALSE(to<bool>(0));
751 EXPECT_FALSE(to<bool>(0ul));
753 EXPECT_TRUE(to<bool>(1));
754 EXPECT_TRUE(to<bool>(1ul));
756 EXPECT_TRUE(to<bool>(-42));
757 EXPECT_TRUE(to<bool>(42ul));
760 template<typename Src>
761 void testStr2Bool() {
762 EXPECT_FALSE(to<bool>(Src("0")));
763 EXPECT_FALSE(to<bool>(Src(" 000 ")));
765 EXPECT_FALSE(to<bool>(Src("n")));
766 EXPECT_FALSE(to<bool>(Src("no")));
767 EXPECT_FALSE(to<bool>(Src("false")));
768 EXPECT_FALSE(to<bool>(Src("False")));
769 EXPECT_FALSE(to<bool>(Src(" fAlSe" )));
770 EXPECT_FALSE(to<bool>(Src("F")));
771 EXPECT_FALSE(to<bool>(Src("off")));
773 EXPECT_TRUE(to<bool>(Src("1")));
774 EXPECT_TRUE(to<bool>(Src(" 001 ")));
775 EXPECT_TRUE(to<bool>(Src("y")));
776 EXPECT_TRUE(to<bool>(Src("yes")));
777 EXPECT_TRUE(to<bool>(Src("\nyEs\t")));
778 EXPECT_TRUE(to<bool>(Src("true")));
779 EXPECT_TRUE(to<bool>(Src("True")));
780 EXPECT_TRUE(to<bool>(Src("T")));
781 EXPECT_TRUE(to<bool>(Src("on")));
783 EXPECT_THROW(to<bool>(Src("")), std::range_error);
784 EXPECT_THROW(to<bool>(Src("2")), std::range_error);
785 EXPECT_THROW(to<bool>(Src("11")), std::range_error);
786 EXPECT_THROW(to<bool>(Src("19")), std::range_error);
787 EXPECT_THROW(to<bool>(Src("o")), std::range_error);
788 EXPECT_THROW(to<bool>(Src("fal")), std::range_error);
789 EXPECT_THROW(to<bool>(Src("tru")), std::range_error);
790 EXPECT_THROW(to<bool>(Src("ye")), std::range_error);
791 EXPECT_THROW(to<bool>(Src("yes foo")), std::range_error);
792 EXPECT_THROW(to<bool>(Src("bar no")), std::range_error);
793 EXPECT_THROW(to<bool>(Src("one")), std::range_error);
794 EXPECT_THROW(to<bool>(Src("true_")), std::range_error);
795 EXPECT_THROW(to<bool>(Src("bogus_token_that_is_too_long")),
799 TEST(Conv, StringToBool) {
800 // testStr2Bool<const char *>();
801 testStr2Bool<std::string>();
803 // Test with strings that are not NUL terminated.
804 const char buf[] = "01234";
805 EXPECT_FALSE(to<bool>(StringPiece(buf, buf + 1))); // "0"
806 EXPECT_TRUE(to<bool>(StringPiece(buf + 1, buf + 2))); // "1"
807 const char buf2[] = "one two three";
808 EXPECT_TRUE(to<bool>(StringPiece(buf2, buf2 + 2))); // "on"
809 const char buf3[] = "false";
810 EXPECT_THROW(to<bool>(StringPiece(buf3, buf3 + 3)), // "fal"
813 // Test the StringPiece* API
814 const char buf4[] = "001foo";
815 StringPiece sp4(buf4);
816 EXPECT_TRUE(to<bool>(&sp4));
817 EXPECT_EQ(buf4 + 3, sp4.begin());
818 const char buf5[] = "0012";
819 StringPiece sp5(buf5);
820 EXPECT_THROW(to<bool>(&sp5), std::range_error);
821 EXPECT_EQ(buf5, sp5.begin());
824 TEST(Conv, Transform) {
825 const std::vector<int64_t> in{1, 2, 3};
826 std::vector<std::string> out(in.size());
827 std::transform(in.begin(), in.end(), out.begin(), to<std::string, int64_t>);
828 const std::vector<std::string> ref{"1", "2", "3"};
832 TEST(Conv, FloatToInt) {
833 EXPECT_EQ(to<int>(42.0f), 42);
834 EXPECT_EQ(to<int8_t>(-128.0f), int8_t(-128));
835 EXPECT_THROW(to<int8_t>(-129.0), std::range_error);
836 EXPECT_THROW(to<int8_t>(127.001), std::range_error);
837 EXPECT_THROW(to<uint8_t>(-0.0001), std::range_error);
839 to<uint64_t>(static_cast<float>(std::numeric_limits<uint64_t>::max())),
843 TEST(Conv, IntToFloat) {
844 EXPECT_EQ(to<float>(42ULL), 42.0);
845 EXPECT_EQ(to<float>(int8_t(-128)), -128.0);
847 to<float>(std::numeric_limits<uint64_t>::max()), std::range_error);
849 to<float>(std::numeric_limits<int64_t>::max()), std::range_error);
851 to<float>(std::numeric_limits<int64_t>::min() + 1), std::range_error);
852 #if FOLLY_HAVE_INT128_T
854 to<double>(std::numeric_limits<unsigned __int128>::max()),
857 to<double>(std::numeric_limits<__int128>::max()), std::range_error);
859 to<double>(std::numeric_limits<__int128>::min() + 1), std::range_error);
863 TEST(Conv, BoolToFloat) {
864 EXPECT_EQ(to<double>(true), 1.0);
865 EXPECT_EQ(to<double>(false), 0.0);
868 TEST(Conv, FloatToBool) {
869 EXPECT_EQ(to<bool>(1.0), true);
870 EXPECT_EQ(to<bool>(0.0), false);
871 EXPECT_EQ(to<bool>(2.7), true);
872 EXPECT_EQ(to<bool>(std::numeric_limits<double>::max()), true);
873 EXPECT_EQ(to<bool>(std::numeric_limits<double>::min()), true);
874 EXPECT_EQ(to<bool>(std::numeric_limits<double>::lowest()), true);
875 EXPECT_EQ(to<bool>(std::numeric_limits<double>::quiet_NaN()), true);
876 EXPECT_EQ(to<bool>(std::numeric_limits<double>::infinity()), true);
877 EXPECT_EQ(to<bool>(-std::numeric_limits<double>::infinity()), true);
882 template <typename F>
890 std::string where = to<std::string>(__FILE__, "(", line, "): ");
893 EXPECT_TRUE(false) << where << exprStr << " -> " << res;
894 } catch (const ConversionError& e) {
895 EXPECT_EQ(code, e.errorCode()) << where << exprStr;
896 std::string str(e.what());
897 EXPECT_FALSE(str.empty()) << where << exprStr << " -> " << str;
898 auto pos = str.find(':');
900 std::ostringstream exp;
901 exp << str.substr(0, pos) + ": ";
903 exp << "\"" << value << "\"";
907 EXPECT_EQ(exp.str(), str) << where << exprStr << " -> " << str;
909 EXPECT_EQ(pos, std::string::npos) << where << exprStr << " -> " << str;
915 #define EXPECT_CONV_ERROR_QUOTE(expr, code, value, quoted) \
917 [&] { return expr; }, \
919 ConversionCode::code, \
924 #define EXPECT_CONV_ERROR(expr, code, value) \
925 EXPECT_CONV_ERROR_QUOTE(expr, code, value, true)
927 #define EXPECT_CONV_ERROR_STR(type, str, code) \
928 EXPECT_CONV_ERROR(to<type>(str), code, str)
930 #define EXPECT_CONV_ERROR_STR_NOVAL(type, str, code) \
931 EXPECT_CONV_ERROR(to<type>(str), code, nullptr)
933 TEST(Conv, ConversionErrorStrToBool) {
934 EXPECT_CONV_ERROR_STR_NOVAL(bool, StringPiece(), EMPTY_INPUT_STRING);
935 EXPECT_CONV_ERROR_STR_NOVAL(bool, "", EMPTY_INPUT_STRING);
936 EXPECT_CONV_ERROR_STR(bool, " ", EMPTY_INPUT_STRING);
937 EXPECT_CONV_ERROR_STR(bool, " 11 ", BOOL_OVERFLOW);
938 EXPECT_CONV_ERROR_STR(bool, "other ", BOOL_INVALID_VALUE);
939 EXPECT_CONV_ERROR_STR(bool, " bla", BOOL_INVALID_VALUE);
940 EXPECT_CONV_ERROR(to<bool>(" offbla"), NON_WHITESPACE_AFTER_END, "bla");
943 TEST(Conv, ConversionErrorStrToFloat) {
944 EXPECT_CONV_ERROR_STR_NOVAL(float, StringPiece(), EMPTY_INPUT_STRING);
945 EXPECT_CONV_ERROR_STR_NOVAL(float, "", EMPTY_INPUT_STRING);
946 EXPECT_CONV_ERROR_STR(float, " ", EMPTY_INPUT_STRING);
947 EXPECT_CONV_ERROR_STR(float, " junk", STRING_TO_FLOAT_ERROR);
948 EXPECT_CONV_ERROR(to<float>(" 1bla"), NON_WHITESPACE_AFTER_END, "bla");
951 TEST(Conv, ConversionErrorStrToInt) {
952 // empty string handling
953 EXPECT_CONV_ERROR_STR_NOVAL(int, StringPiece(), EMPTY_INPUT_STRING);
954 EXPECT_CONV_ERROR_STR_NOVAL(int, "", EMPTY_INPUT_STRING);
955 EXPECT_CONV_ERROR_STR(int, " ", EMPTY_INPUT_STRING);
958 EXPECT_CONV_ERROR_STR(int, " *", INVALID_LEADING_CHAR);
959 EXPECT_CONV_ERROR_STR(int, " +", NO_DIGITS);
960 EXPECT_CONV_ERROR_STR(int, " +*", NON_DIGIT_CHAR);
961 EXPECT_CONV_ERROR_STR(int8_t, " 128", POSITIVE_OVERFLOW);
962 EXPECT_CONV_ERROR_STR(int8_t, " -129", NEGATIVE_OVERFLOW);
963 EXPECT_CONV_ERROR_STR(int8_t, " 1000", POSITIVE_OVERFLOW);
964 EXPECT_CONV_ERROR_STR(int8_t, "-1000", NEGATIVE_OVERFLOW);
965 EXPECT_CONV_ERROR(to<int>(" -13bla"), NON_WHITESPACE_AFTER_END, "bla");
968 EXPECT_CONV_ERROR_STR(unsigned, " -", NON_DIGIT_CHAR);
969 EXPECT_CONV_ERROR_STR(uint8_t, " 256", POSITIVE_OVERFLOW);
970 EXPECT_CONV_ERROR(to<unsigned>("42bla"), NON_WHITESPACE_AFTER_END, "bla");
973 #define EXPECT_CONV_ERROR_PP_VAL(type, str, code, val) \
975 StringPiece input(str); \
976 EXPECT_CONV_ERROR(to<type>(input.begin(), input.end()), code, val); \
979 #define EXPECT_CONV_ERROR_PP(type, str, code) \
980 EXPECT_CONV_ERROR_PP_VAL(type, str, code, str)
982 TEST(Conv, ConversionErrorPtrPairToInt) {
984 EXPECT_CONV_ERROR_PP(int, "", INVALID_LEADING_CHAR);
985 EXPECT_CONV_ERROR_PP(int, " ", INVALID_LEADING_CHAR);
986 EXPECT_CONV_ERROR_PP(int, "*", INVALID_LEADING_CHAR);
987 EXPECT_CONV_ERROR_PP(int, "+", NO_DIGITS);
988 EXPECT_CONV_ERROR_PP(int8_t, "128", POSITIVE_OVERFLOW);
989 EXPECT_CONV_ERROR_PP(int8_t, "-129", NEGATIVE_OVERFLOW);
990 EXPECT_CONV_ERROR_PP(int8_t, "1000", POSITIVE_OVERFLOW);
991 EXPECT_CONV_ERROR_PP(int8_t, "-1000", NEGATIVE_OVERFLOW);
992 EXPECT_CONV_ERROR_PP(int, "-junk", NON_DIGIT_CHAR);
995 EXPECT_CONV_ERROR_PP(unsigned, "", NO_DIGITS);
996 EXPECT_CONV_ERROR_PP(uint8_t, "256", POSITIVE_OVERFLOW);
997 EXPECT_CONV_ERROR_PP(unsigned, "junk", NON_DIGIT_CHAR);
1002 template <typename T, typename V>
1003 std::string prefixWithType(V value) {
1004 std::ostringstream oss;
1005 #ifdef FOLLY_HAS_RTTI
1006 oss << "(" << demangle(typeid(T)) << ") ";
1008 oss << to<std::string>(value);
1013 #define EXPECT_CONV_ERROR_ARITH(type, val, code) \
1014 EXPECT_CONV_ERROR_QUOTE( \
1015 to<type>(val), code, prefixWithType<type>(val).c_str(), false)
1017 TEST(Conv, ConversionErrorIntToInt) {
1018 EXPECT_CONV_ERROR_ARITH(signed char, 128, ARITH_POSITIVE_OVERFLOW);
1019 EXPECT_CONV_ERROR_ARITH(unsigned char, -1, ARITH_NEGATIVE_OVERFLOW);
1022 TEST(Conv, ConversionErrorFloatToFloat) {
1023 EXPECT_CONV_ERROR_ARITH(
1024 float, std::numeric_limits<double>::max(), ARITH_POSITIVE_OVERFLOW);
1025 EXPECT_CONV_ERROR_ARITH(
1026 float, std::numeric_limits<double>::lowest(), ARITH_NEGATIVE_OVERFLOW);
1029 TEST(Conv, ConversionErrorIntToFloat) {
1030 EXPECT_CONV_ERROR_ARITH(
1031 float, std::numeric_limits<long long>::max(), ARITH_LOSS_OF_PRECISION);
1034 TEST(Conv, ConversionErrorFloatToInt) {
1035 EXPECT_CONV_ERROR_ARITH(int8_t, 65.5, ARITH_LOSS_OF_PRECISION);
1038 TEST(Conv, TryStringToBool) {
1039 auto rv1 = folly::tryTo<bool>("xxxx");
1040 EXPECT_FALSE(rv1.hasValue());
1041 auto rv2 = folly::tryTo<bool>("false");
1042 EXPECT_TRUE(rv2.hasValue());
1043 EXPECT_FALSE(rv2.value());
1044 auto rv3 = folly::tryTo<bool>("yes");
1045 EXPECT_TRUE(rv3.hasValue());
1046 EXPECT_TRUE(rv3.value());
1049 TEST(Conv, TryStringToInt) {
1050 auto rv1 = folly::tryTo<int>("1000000000000000000000000000000");
1051 EXPECT_FALSE(rv1.hasValue());
1052 auto rv2 = folly::tryTo<int>("4711");
1053 EXPECT_TRUE(rv2.hasValue());
1054 EXPECT_EQ(rv2.value(), 4711);
1057 TEST(Conv, TryStringToFloat) {
1058 auto rv1 = folly::tryTo<float>("");
1059 EXPECT_FALSE(rv1.hasValue());
1060 auto rv2 = folly::tryTo<float>("3.14");
1061 EXPECT_TRUE(rv2.hasValue());
1062 EXPECT_NEAR(rv2.value(), 3.14, 1e-5);
1065 TEST(Conv, TryStringToDouble) {
1066 auto rv1 = folly::tryTo<double>("");
1067 EXPECT_FALSE(rv1.hasValue());
1068 auto rv2 = folly::tryTo<double>("3.14");
1069 EXPECT_TRUE(rv2.hasValue());
1070 EXPECT_NEAR(rv2.value(), 3.14, 1e-10);
1073 TEST(Conv, TryIntToInt) {
1074 auto rv1 = folly::tryTo<uint8_t>(256);
1075 EXPECT_FALSE(rv1.hasValue());
1076 auto rv2 = folly::tryTo<uint8_t>(255);
1077 EXPECT_TRUE(rv2.hasValue());
1078 EXPECT_EQ(rv2.value(), 255);
1081 TEST(Conv, TryFloatToFloat) {
1082 auto rv1 = folly::tryTo<float>(1e100);
1083 EXPECT_FALSE(rv1.hasValue());
1084 auto rv2 = folly::tryTo<double>(25.5f);
1085 EXPECT_TRUE(rv2.hasValue());
1086 EXPECT_NEAR(rv2.value(), 25.5, 1e-10);
1089 TEST(Conv, TryFloatToInt) {
1090 auto rv1 = folly::tryTo<int>(100.001);
1091 EXPECT_FALSE(rv1.hasValue());
1092 auto rv2 = folly::tryTo<int>(100.0);
1093 EXPECT_TRUE(rv2.hasValue());
1094 EXPECT_EQ(rv2.value(), 100);
1097 TEST(Conv, TryIntToFloat) {
1098 auto rv1 = folly::tryTo<float>(std::numeric_limits<uint64_t>::max());
1099 EXPECT_FALSE(rv1.hasValue());
1100 auto rv2 = folly::tryTo<float>(1000ULL);
1101 EXPECT_TRUE(rv2.hasValue());
1102 EXPECT_EQ(rv2.value(), 1000.0f);
1105 TEST(Conv, TryPtrPairToInt) {
1106 StringPiece sp1("1000000000000000000000000000000");
1107 auto rv1 = folly::tryTo<int>(sp1.begin(), sp1.end());
1108 EXPECT_FALSE(rv1.hasValue());
1109 StringPiece sp2("4711");
1110 auto rv2 = folly::tryTo<int>(sp2.begin(), sp2.end());
1111 EXPECT_TRUE(rv2.hasValue());
1112 EXPECT_EQ(rv2.value(), 4711);
1113 StringPiece sp3("-4711");
1114 auto rv3 = folly::tryTo<int>(sp3.begin(), sp3.end());
1115 EXPECT_TRUE(rv3.hasValue());
1116 EXPECT_EQ(rv3.value(), -4711);
1117 StringPiece sp4("4711");
1118 auto rv4 = folly::tryTo<uint16_t>(sp4.begin(), sp4.end());
1119 EXPECT_TRUE(rv4.hasValue());
1120 EXPECT_EQ(rv4.value(), 4711);
1123 TEST(Conv, NewUint64ToString) {
1126 #define THE_GREAT_EXPECTATIONS(n, len) \
1128 EXPECT_EQ((len), uint64ToBufferUnsafe((n), buf)); \
1130 auto s = string(#n); \
1131 s = s.substr(0, s.size() - 2); \
1132 EXPECT_EQ(s, buf); \
1135 THE_GREAT_EXPECTATIONS(0UL, 1);
1136 THE_GREAT_EXPECTATIONS(1UL, 1);
1137 THE_GREAT_EXPECTATIONS(12UL, 2);
1138 THE_GREAT_EXPECTATIONS(123UL, 3);
1139 THE_GREAT_EXPECTATIONS(1234UL, 4);
1140 THE_GREAT_EXPECTATIONS(12345UL, 5);
1141 THE_GREAT_EXPECTATIONS(123456UL, 6);
1142 THE_GREAT_EXPECTATIONS(1234567UL, 7);
1143 THE_GREAT_EXPECTATIONS(12345678UL, 8);
1144 THE_GREAT_EXPECTATIONS(123456789UL, 9);
1145 THE_GREAT_EXPECTATIONS(1234567890UL, 10);
1146 THE_GREAT_EXPECTATIONS(12345678901UL, 11);
1147 THE_GREAT_EXPECTATIONS(123456789012UL, 12);
1148 THE_GREAT_EXPECTATIONS(1234567890123UL, 13);
1149 THE_GREAT_EXPECTATIONS(12345678901234UL, 14);
1150 THE_GREAT_EXPECTATIONS(123456789012345UL, 15);
1151 THE_GREAT_EXPECTATIONS(1234567890123456UL, 16);
1152 THE_GREAT_EXPECTATIONS(12345678901234567UL, 17);
1153 THE_GREAT_EXPECTATIONS(123456789012345678UL, 18);
1154 THE_GREAT_EXPECTATIONS(1234567890123456789UL, 19);
1155 THE_GREAT_EXPECTATIONS(18446744073709551614UL, 20);
1156 THE_GREAT_EXPECTATIONS(18446744073709551615UL, 20);
1158 #undef THE_GREAT_EXPECTATIONS
1161 TEST(Conv, allocate_size) {
1162 std::string str1 = "meh meh meh";
1163 std::string str2 = "zdech zdech zdech";
1165 auto res1 = folly::to<std::string>(str1, ".", str2);
1166 EXPECT_EQ(res1, str1 + "." + str2);
1168 std::string res2; //empty
1169 toAppendFit(str1, str2, 1, &res2);
1170 EXPECT_EQ(res2, str1 + str2 + "1");
1173 toAppendDelimFit(",", str1, str2, &res3);
1174 EXPECT_EQ(res3, str1 + "," + str2);
1180 std::tuple<const int&, const int&> tuple_view() const {
1183 bool operator==(const Dimensions& other) const {
1184 return this->tuple_view() == other.tuple_view();
1188 Expected<StringPiece, ConversionCode> parseTo(
1189 folly::StringPiece in,
1191 return parseTo(in, out.w)
1192 .then([](StringPiece sp) { return sp.removePrefix("x"), sp; })
1193 .then([&](StringPiece sp) { return parseTo(sp, out.h); });
1196 template <class String>
1197 void toAppend(const Dimensions& in, String* result) {
1198 folly::toAppend(in.w, 'x', in.h, result);
1201 size_t estimateSpaceNeeded(const Dimensions&in) {
1202 return 2000 + folly::estimateSpaceNeeded(in.w) +
1203 folly::estimateSpaceNeeded(in.h);
1207 TEST(Conv, custom_kkproviders) {
1208 my::Dimensions expected{7, 8};
1209 EXPECT_EQ(expected, folly::to<my::Dimensions>("7x8"));
1210 auto str = folly::to<std::string>(expected);
1211 EXPECT_EQ("7x8", str);
1212 // make sure above implementation of estimateSpaceNeeded() is used.
1213 EXPECT_GT(str.capacity(), 2000);
1214 EXPECT_LT(str.capacity(), 2500);
1217 TEST(Conv, TryToThenWithVoid) {
1218 auto x = tryTo<int>("42").then([](int) {});
1219 EXPECT_TRUE(x.hasValue());