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 #ifndef __STDC_FORMAT_MACROS
18 #define __STDC_FORMAT_MACROS 1
21 #include <boost/lexical_cast.hpp>
22 #include <folly/Conv.h>
23 #include <folly/Foreach.h>
24 #include <gtest/gtest.h>
33 using namespace folly;
36 TEST(Conv, digits10) {
40 // first, some basic sniff tests
41 EXPECT_EQ( 1, digits10(0));
42 EXPECT_EQ( 1, digits10(1));
43 EXPECT_EQ( 1, digits10(9));
44 EXPECT_EQ( 2, digits10(10));
45 EXPECT_EQ( 2, digits10(99));
46 EXPECT_EQ( 3, digits10(100));
47 EXPECT_EQ( 3, digits10(999));
48 EXPECT_EQ( 4, digits10(1000));
49 EXPECT_EQ( 4, digits10(9999));
50 EXPECT_EQ(20, digits10(18446744073709551615ULL));
52 // try the first X nonnegatives.
53 // Covers some more cases of 2^p, 10^p
54 for (uint64_t i = 0; i < 100000; i++) {
55 snprintf(buffer, sizeof(buffer), "%" PRIu64, i);
56 EXPECT_EQ(strlen(buffer), digits10(i));
61 for (int p = 0; p < 64; p++) {
62 snprintf(buffer, sizeof(buffer), "%" PRIu64, power);
63 EXPECT_EQ(strlen(buffer), digits10(power));
64 snprintf(buffer, sizeof(buffer), "%" PRIu64, power - 1);
65 EXPECT_EQ(strlen(buffer), digits10(power - 1));
66 snprintf(buffer, sizeof(buffer), "%" PRIu64, power + 1);
67 EXPECT_EQ(strlen(buffer), digits10(power + 1));
73 for (int p = 0; p < 20; p++) {
74 snprintf(buffer, sizeof(buffer), "%" PRIu64, power);
75 EXPECT_EQ(strlen(buffer), digits10(power));
76 snprintf(buffer, sizeof(buffer), "%" PRIu64, power - 1);
77 EXPECT_EQ(strlen(buffer), digits10(power - 1));
78 snprintf(buffer, sizeof(buffer), "%" PRIu64, power + 1);
79 EXPECT_EQ(strlen(buffer), digits10(power + 1));
85 TEST(Conv, Type2Type) {
87 EXPECT_EQ(to<bool>(boolV), true);
90 EXPECT_EQ(to<int>(intV), 42);
93 EXPECT_EQ(to<float>(floatV), 4.2f);
95 double doubleV = 0.42;
96 EXPECT_EQ(to<double>(doubleV), 0.42);
98 std::string stringV = "StdString";
99 EXPECT_EQ(to<std::string>(stringV), "StdString");
101 folly::fbstring fbStrV = "FBString";
102 EXPECT_EQ(to<folly::fbstring>(fbStrV), "FBString");
104 folly::StringPiece spV("StringPiece");
105 EXPECT_EQ(to<folly::StringPiece>(spV), "StringPiece");
108 EXPECT_EQ(to<bool>(true), true);
109 EXPECT_EQ(to<int>(42), 42);
110 EXPECT_EQ(to<float>(4.2f), 4.2f);
111 EXPECT_EQ(to<double>(.42), .42);
112 EXPECT_EQ(to<std::string>(std::string("Hello")), "Hello");
113 EXPECT_EQ(to<folly::fbstring>(folly::fbstring("hello")), "hello");
114 EXPECT_EQ(to<folly::StringPiece>(folly::StringPiece("Forty Two")),
118 TEST(Conv, Integral2Integral) {
119 // Same size, different signs
120 int64_t s64 = numeric_limits<uint8_t>::max();
121 EXPECT_EQ(to<uint8_t>(s64), s64);
123 s64 = numeric_limits<int8_t>::max();
124 EXPECT_EQ(to<int8_t>(s64), s64);
127 TEST(Conv, Floating2Floating) {
129 double d1 = to<double>(f1);
133 auto f2 = to<float>(d2);
134 EXPECT_EQ(double(f2), d2);
136 double invalidFloat = std::numeric_limits<double>::max();
137 EXPECT_ANY_THROW(to<float>(invalidFloat));
138 invalidFloat = -std::numeric_limits<double>::max();
139 EXPECT_ANY_THROW(to<float>(invalidFloat));
142 auto shouldWork = to<float>(std::numeric_limits<double>::min());
143 // The value of `shouldWork' is an implementation defined choice
144 // between the following two alternatives.
145 EXPECT_TRUE(shouldWork == std::numeric_limits<float>::min() ||
152 template <class String>
153 void testIntegral2String() {
156 template <class String, class Int, class... Ints>
157 void testIntegral2String() {
158 typedef typename make_unsigned<Int>::type Uint;
159 typedef typename make_signed<Int>::type Sint;
162 EXPECT_EQ(to<String>(value), "123");
164 EXPECT_EQ(to<String>(svalue), "123");
166 EXPECT_EQ(to<String>(svalue), "-123");
168 value = numeric_limits<Uint>::min();
169 EXPECT_EQ(to<Uint>(to<String>(value)), value);
170 value = numeric_limits<Uint>::max();
171 EXPECT_EQ(to<Uint>(to<String>(value)), value);
173 svalue = numeric_limits<Sint>::min();
174 EXPECT_EQ(to<Sint>(to<String>(svalue)), svalue);
175 value = numeric_limits<Sint>::max();
176 EXPECT_EQ(to<Sint>(to<String>(svalue)), svalue);
178 testIntegral2String<String, Ints...>();
181 #if FOLLY_HAVE_INT128_T
182 template <class String>
183 void test128Bit2String() {
184 typedef unsigned __int128 Uint;
185 typedef __int128 Sint;
187 EXPECT_EQ(detail::digitsEnough<unsigned __int128>(), 39);
190 EXPECT_EQ(to<String>(value), "123");
192 EXPECT_EQ(to<String>(svalue), "123");
194 EXPECT_EQ(to<String>(svalue), "-123");
196 value = __int128(1) << 64;
197 EXPECT_EQ(to<String>(value), "18446744073709551616");
199 svalue = -(__int128(1) << 64);
200 EXPECT_EQ(to<String>(svalue), "-18446744073709551616");
203 EXPECT_EQ(to<String>(value), "0");
206 EXPECT_EQ(to<String>(svalue), "0");
208 value = ~__int128(0);
209 EXPECT_EQ(to<String>(value), "340282366920938463463374607431768211455");
211 svalue = -(Uint(1) << 127);
212 EXPECT_EQ(to<String>(svalue), "-170141183460469231731687303715884105728");
214 svalue = (Uint(1) << 127) - 1;
215 EXPECT_EQ(to<String>(svalue), "170141183460469231731687303715884105727");
217 // TODO: the following do not compile to<__int128> ...
220 value = numeric_limits<Uint>::min();
221 EXPECT_EQ(to<Uint>(to<String>(value)), value);
222 value = numeric_limits<Uint>::max();
223 EXPECT_EQ(to<Uint>(to<String>(value)), value);
225 svalue = numeric_limits<Sint>::min();
226 EXPECT_EQ(to<Sint>(to<String>(svalue)), svalue);
227 value = numeric_limits<Sint>::max();
228 EXPECT_EQ(to<Sint>(to<String>(svalue)), svalue);
234 TEST(Conv, Integral2String) {
235 testIntegral2String<std::string, int8_t, int16_t, int32_t, int64_t>();
236 testIntegral2String<fbstring, int8_t, int16_t, int32_t, int64_t>();
238 #if FOLLY_HAVE_INT128_T
239 test128Bit2String<std::string>();
240 test128Bit2String<fbstring>();
244 template <class String>
245 void testString2Integral() {
248 template <class String, class Int, class... Ints>
249 void testString2Integral() {
250 typedef typename make_unsigned<Int>::type Uint;
251 typedef typename make_signed<Int>::type Sint;
253 // Unsigned numbers small enough to fit in a signed type
254 static const String strings[] = {
261 "0000000000000000000000000042"
263 static const Uint values[] = {
272 FOR_EACH_RANGE (i, 0, sizeof(strings) / sizeof(*strings)) {
273 EXPECT_EQ(to<Uint>(strings[i]), values[i]);
274 EXPECT_EQ(to<Sint>(strings[i]), values[i]);
277 // Unsigned numbers that won't fit in the signed variation
278 static const String uStrings[] = {
283 static const Uint uValues[] = {
288 FOR_EACH_RANGE (i, 0, sizeof(uStrings)/sizeof(*uStrings)) {
289 EXPECT_EQ(to<Uint>(uStrings[i]), uValues[i]);
290 if (sizeof(Int) == 1) {
291 EXPECT_THROW(to<Sint>(uStrings[i]), std::range_error);
295 if (sizeof(Int) >= 4) {
296 static const String strings2[] = {
302 static const Uint values2[] = {
308 FOR_EACH_RANGE (i, 0, sizeof(strings2)/sizeof(*strings2)) {
309 EXPECT_EQ(to<Uint>(strings2[i]), values2[i]);
310 EXPECT_EQ(to<Sint>(strings2[i]), values2[i]);
313 static const String uStrings2[] = {
319 static const Uint uValues2[] = {
325 FOR_EACH_RANGE (i, 0, sizeof(uStrings2)/sizeof(uStrings2)) {
326 EXPECT_EQ(to<Uint>(uStrings2[i]), uValues2[i]);
327 if (sizeof(Int) == 4) {
328 EXPECT_THROW(to<Sint>(uStrings2[i]), std::range_error);
333 if (sizeof(Int) >= 8) {
334 static_assert(sizeof(Int) <= 8, "Now that would be interesting");
335 static const String strings3[] = {
339 "100000000000000000",
340 "9223372036854775807",
342 static const Uint values3[] = {
345 (Uint)25687346509278435ULL,
346 (Uint)100000000000000000ULL,
347 (Uint)9223372036854775807ULL,
349 FOR_EACH_RANGE (i, 0, sizeof(strings3)/sizeof(*strings3)) {
350 EXPECT_EQ(to<Uint>(strings3[i]), values3[i]);
351 EXPECT_EQ(to<Sint>(strings3[i]), values3[i]);
354 static const String uStrings3[] = {
355 "9223372036854775808",
356 "9987435987394857987",
357 "17873648761234698740",
358 "18446744073709551615",
360 static const Uint uValues3[] = {
361 (Uint)9223372036854775808ULL,
362 (Uint)9987435987394857987ULL,
363 (Uint)17873648761234698740ULL,
364 (Uint)18446744073709551615ULL,
366 FOR_EACH_RANGE (i, 0, sizeof(uStrings3)/sizeof(*uStrings3)) {
367 EXPECT_EQ(to<Uint>(uStrings3[i]), uValues3[i]);
368 if (sizeof(Int) == 8) {
369 EXPECT_THROW(to<Sint>(uStrings3[i]), std::range_error);
374 // Minimum possible negative values, and negative sign overflow
375 static const String strings4[] = {
379 "-9223372036854775808",
381 static const String strings5[] = {
385 "-9223372036854775809",
387 static const Sint values4[] = {
391 (Sint)(-9223372036854775807LL - 1),
393 FOR_EACH_RANGE (i, 0, sizeof(strings4)/sizeof(*strings4)) {
394 if (sizeof(Int) > std::pow(2, i)) {
395 EXPECT_EQ(values4[i], to<Sint>(strings4[i]));
396 EXPECT_EQ(values4[i] - 1, to<Sint>(strings5[i]));
397 } else if (sizeof(Int) == std::pow(2, i)) {
398 EXPECT_EQ(values4[i], to<Sint>(strings4[i]));
399 EXPECT_THROW(to<Sint>(strings5[i]), std::range_error);
401 EXPECT_THROW(to<Sint>(strings4[i]), std::range_error);
402 EXPECT_THROW(to<Sint>(strings5[i]), std::range_error);
406 // Bogus string values
407 static const String bogusStrings[] = {
414 "- 42", // whitespace is not allowed between the sign and the value
416 "12345678901234567890123456789",
418 for (const auto& str : bogusStrings) {
419 EXPECT_THROW(to<Sint>(str), std::range_error);
420 EXPECT_THROW(to<Uint>(str), std::range_error);
423 // A leading '+' character is only allowed when converting to signed types.
424 String posSign("+42");
425 EXPECT_EQ(42, to<Sint>(posSign));
426 EXPECT_THROW(to<Uint>(posSign), std::range_error);
428 testString2Integral<String, Ints...>();
431 TEST(Conv, String2Integral) {
432 testString2Integral<const char*, int8_t, int16_t, int32_t, int64_t>();
433 testString2Integral<std::string, int8_t, int16_t, int32_t, int64_t>();
434 testString2Integral<fbstring, int8_t, int16_t, int32_t, int64_t>();
436 // Testing the behavior of the StringPiece* API
437 // StringPiece* normally parses as much valid data as it can,
438 // and advances the StringPiece to the end of the valid data.
439 char buf1[] = "100foo";
440 StringPiece sp1(buf1);
441 EXPECT_EQ(100, to<uint8_t>(&sp1));
442 EXPECT_EQ(buf1 + 3, sp1.begin());
443 // However, if the next character would cause an overflow it throws a
444 // range_error rather than consuming only as much as it can without
446 char buf2[] = "1002";
447 StringPiece sp2(buf2);
448 EXPECT_THROW(to<uint8_t>(&sp2), std::range_error);
449 EXPECT_EQ(buf2, sp2.begin());
452 TEST(Conv, StringPiece2Integral) {
453 string s = " +123 hello world ";
455 EXPECT_EQ(to<int>(&sp), 123);
456 EXPECT_EQ(sp, " hello world ");
459 TEST(Conv, StringPieceAppend) {
462 StringPiece sp(s, 0, 3);
463 string result = to<string>(s, sp);
464 EXPECT_EQ(result, "foobarfoo");
467 StringPiece sp1(s, 0, 3);
468 StringPiece sp2(s, 3, 3);
469 string result = to<string>(sp1, sp2);
470 EXPECT_EQ(result, s);
474 TEST(Conv, BadStringToIntegral) {
475 // Note that leading spaces (e.g. " 1") are valid.
476 vector<string> v = { "a", "", " ", "\n", " a0", "abcdef", "1Z", "!#" };
478 EXPECT_THROW(to<int>(s), std::range_error) << "s=" << s;
482 template <class String>
483 void testIdenticalTo() {
484 String s("Yukkuri shiteitte ne!!!");
486 String result = to<String>(s);
487 EXPECT_EQ(result, s);
490 template <class String>
491 void testVariadicTo() {
494 toAppend("Lorem ipsum ", 1234, String(" dolor amet "), 567.89, '!', &s);
495 EXPECT_EQ(s, "Lorem ipsum 1234 dolor amet 567.89!");
498 EXPECT_TRUE(s.empty());
500 s = to<String>("Lorem ipsum ", nullptr, 1234, " dolor amet ", 567.89, '.');
501 EXPECT_EQ(s, "Lorem ipsum 1234 dolor amet 567.89.");
504 template <class String>
505 void testIdenticalToDelim() {
506 String s("Yukkuri shiteitte ne!!!");
508 String charDelim = toDelim<String>('$', s);
509 EXPECT_EQ(charDelim, s);
511 String strDelim = toDelim<String>(String(">_<"), s);
512 EXPECT_EQ(strDelim, s);
515 template <class String>
516 void testVariadicToDelim() {
518 toAppendDelim(":", &s);
520 ":", "Lorem ipsum ", 1234, String(" dolor amet "), 567.89, '!', &s);
521 EXPECT_EQ(s, "Lorem ipsum :1234: dolor amet :567.89:!");
523 s = toDelim<String>(':');
524 EXPECT_TRUE(s.empty());
527 ":", "Lorem ipsum ", nullptr, 1234, " dolor amet ", 567.89, '.');
528 EXPECT_EQ(s, "Lorem ipsum ::1234: dolor amet :567.89:.");
531 TEST(Conv, NullString) {
532 string s1 = to<string>((char *) nullptr);
533 EXPECT_TRUE(s1.empty());
534 fbstring s2 = to<fbstring>((char *) nullptr);
535 EXPECT_TRUE(s2.empty());
538 TEST(Conv, VariadicTo) {
539 testIdenticalTo<string>();
540 testIdenticalTo<fbstring>();
541 testVariadicTo<string>();
542 testVariadicTo<fbstring>();
545 TEST(Conv, VariadicToDelim) {
546 testIdenticalToDelim<string>();
547 testIdenticalToDelim<fbstring>();
548 testVariadicToDelim<string>();
549 testVariadicToDelim<fbstring>();
552 template <class String>
553 void testDoubleToString() {
554 EXPECT_EQ(to<string>(0.0), "0");
555 EXPECT_EQ(to<string>(0.5), "0.5");
556 EXPECT_EQ(to<string>(10.25), "10.25");
557 EXPECT_EQ(to<string>(1.123e10), "11230000000");
560 TEST(Conv, DoubleToString) {
561 testDoubleToString<string>();
562 testDoubleToString<fbstring>();
565 TEST(Conv, FBStringToString) {
567 string ret = to<string>(foo);
568 EXPECT_EQ(ret, "foo");
569 string ret2 = to<string>(foo, 2);
570 EXPECT_EQ(ret2, "foo2");
573 TEST(Conv, StringPieceToDouble) {
574 vector<tuple<const char*, const char*, double>> strs{
575 make_tuple("2134123.125 zorro", " zorro", 2134123.125),
576 make_tuple(" 2134123.125 zorro", " zorro", 2134123.125),
577 make_tuple(" 2134123.125 zorro", " zorro", 2134123.125),
578 make_tuple(" 2134123.125 zorro ", " zorro ", 2134123.125),
579 make_tuple("2134123.125zorro", "zorro", 2134123.125),
580 make_tuple("0 zorro", " zorro", 0.0),
581 make_tuple(" 0 zorro", " zorro", 0.0),
582 make_tuple(" 0 zorro", " zorro", 0.0),
583 make_tuple(" 0 zorro ", " zorro ", 0.0),
584 make_tuple("0zorro", "zorro", 0.0),
585 make_tuple("0.0 zorro", " zorro", 0.0),
586 make_tuple(" 0.0 zorro", " zorro", 0.0),
587 make_tuple(" 0.0 zorro", " zorro", 0.0),
588 make_tuple(" 0.0 zorro ", " zorro ", 0.0),
589 make_tuple("0.0zorro", "zorro", 0.0),
591 for (const auto& s : strs) {
592 StringPiece pc(get<0>(s));
593 EXPECT_EQ(get<2>(s), to<double>(&pc)) << "\"" << get<0>(s) << "\"";
594 EXPECT_EQ(get<1>(s), pc);
595 EXPECT_THROW(to<double>(StringPiece(get<0>(s))), std::range_error);
596 EXPECT_EQ(get<2>(s), to<double>(StringPiece(get<0>(s), pc.data())));
599 // Test NaN conversion
601 to<double>("not a number");
603 } catch (const std::range_error &) {
606 EXPECT_TRUE(std::isnan(to<double>("NaN")));
607 EXPECT_EQ(to<double>("inf"), numeric_limits<double>::infinity());
608 EXPECT_EQ(to<double>("infinity"), numeric_limits<double>::infinity());
609 EXPECT_THROW(to<double>("infinitX"), std::range_error);
610 EXPECT_EQ(to<double>("-inf"), -numeric_limits<double>::infinity());
611 EXPECT_EQ(to<double>("-infinity"), -numeric_limits<double>::infinity());
612 EXPECT_THROW(to<double>("-infinitX"), std::range_error);
615 TEST(Conv, EmptyStringToInt) {
622 } catch (const std::range_error &) {
626 TEST(Conv, CorruptedStringToInt) {
628 StringPiece pc(s.data(), s.data() + 1); // Only "-"
633 } catch (const std::range_error &) {
637 TEST(Conv, EmptyStringToDouble) {
644 } catch (const std::range_error &) {
648 TEST(Conv, IntToDouble) {
649 auto d = to<double>(42);
651 /* This seems not work in ubuntu11.10, gcc 4.6.1
653 auto f = to<float>(957837589847);
655 } catch (std::range_error& e) {
656 //LOG(INFO) << e.what();
661 TEST(Conv, DoubleToInt) {
662 auto i = to<int>(42.0);
665 auto i = to<int>(42.1);
666 LOG(ERROR) << "to<int> returned " << i << " instead of throwing";
668 } catch (std::range_error& e) {
669 //LOG(INFO) << e.what();
673 TEST(Conv, EnumToInt) {
674 enum A { x = 42, y = 420, z = 65 };
677 auto j = to<char>(x);
680 auto i = to<char>(y);
681 LOG(ERROR) << "to<char> returned "
682 << static_cast<unsigned int>(i)
683 << " instead of throwing";
685 } catch (std::range_error& e) {
686 //LOG(INFO) << e.what();
690 TEST(Conv, EnumToString) {
692 enum A { x = 4, y = 420, z = 65 };
693 EXPECT_EQ("foo.4", to<string>("foo.", x));
694 EXPECT_EQ("foo.420", to<string>("foo.", y));
695 EXPECT_EQ("foo.65", to<string>("foo.", z));
698 TEST(Conv, IntToEnum) {
699 enum A { x = 42, y = 420 };
705 auto i = to<A>(5000000000L);
706 LOG(ERROR) << "to<A> returned "
707 << static_cast<unsigned int>(i)
708 << " instead of throwing";
710 } catch (std::range_error& e) {
711 //LOG(INFO) << e.what();
715 TEST(Conv, UnsignedEnum) {
716 enum E : uint32_t { x = 3000000000U };
717 auto u = to<uint32_t>(x);
718 EXPECT_EQ(u, 3000000000U);
719 auto s = to<string>(x);
720 EXPECT_EQ("3000000000", s);
721 auto e = to<E>(3000000000U);
724 auto i = to<int32_t>(x);
725 LOG(ERROR) << "to<int32_t> returned " << i << " instead of throwing";
727 } catch (std::range_error& e) {
731 TEST(Conv, UnsignedEnumClass) {
732 enum class E : uint32_t { x = 3000000000U };
733 auto u = to<uint32_t>(E::x);
735 EXPECT_EQ(u, 3000000000U);
736 EXPECT_EQ("3000000000", to<string>(E::x));
737 EXPECT_EQ(E::x, to<E>(3000000000U));
738 EXPECT_EQ(E::x, to<E>("3000000000"));
740 EXPECT_TRUE(parseTo("3000000000", e).hasValue());
742 EXPECT_THROW(to<int32_t>(E::x), std::range_error);
745 // Multi-argument to<string> uses toAppend, a different code path than
747 TEST(Conv, EnumClassToString) {
748 enum class A { x = 4, y = 420, z = 65 };
749 EXPECT_EQ("foo.4", to<string>("foo.", A::x));
750 EXPECT_EQ("foo.420", to<string>("foo.", A::y));
751 EXPECT_EQ("foo.65", to<string>("foo.", A::z));
754 TEST(Conv, IntegralToBool) {
755 EXPECT_FALSE(to<bool>(0));
756 EXPECT_FALSE(to<bool>(0ul));
758 EXPECT_TRUE(to<bool>(1));
759 EXPECT_TRUE(to<bool>(1ul));
761 EXPECT_TRUE(to<bool>(-42));
762 EXPECT_TRUE(to<bool>(42ul));
765 template<typename Src>
766 void testStr2Bool() {
767 EXPECT_FALSE(to<bool>(Src("0")));
768 EXPECT_FALSE(to<bool>(Src(" 000 ")));
770 EXPECT_FALSE(to<bool>(Src("n")));
771 EXPECT_FALSE(to<bool>(Src("no")));
772 EXPECT_FALSE(to<bool>(Src("false")));
773 EXPECT_FALSE(to<bool>(Src("False")));
774 EXPECT_FALSE(to<bool>(Src(" fAlSe" )));
775 EXPECT_FALSE(to<bool>(Src("F")));
776 EXPECT_FALSE(to<bool>(Src("off")));
778 EXPECT_TRUE(to<bool>(Src("1")));
779 EXPECT_TRUE(to<bool>(Src(" 001 ")));
780 EXPECT_TRUE(to<bool>(Src("y")));
781 EXPECT_TRUE(to<bool>(Src("yes")));
782 EXPECT_TRUE(to<bool>(Src("\nyEs\t")));
783 EXPECT_TRUE(to<bool>(Src("true")));
784 EXPECT_TRUE(to<bool>(Src("True")));
785 EXPECT_TRUE(to<bool>(Src("T")));
786 EXPECT_TRUE(to<bool>(Src("on")));
788 EXPECT_THROW(to<bool>(Src("")), std::range_error);
789 EXPECT_THROW(to<bool>(Src("2")), std::range_error);
790 EXPECT_THROW(to<bool>(Src("11")), std::range_error);
791 EXPECT_THROW(to<bool>(Src("19")), std::range_error);
792 EXPECT_THROW(to<bool>(Src("o")), std::range_error);
793 EXPECT_THROW(to<bool>(Src("fal")), std::range_error);
794 EXPECT_THROW(to<bool>(Src("tru")), std::range_error);
795 EXPECT_THROW(to<bool>(Src("ye")), std::range_error);
796 EXPECT_THROW(to<bool>(Src("yes foo")), std::range_error);
797 EXPECT_THROW(to<bool>(Src("bar no")), std::range_error);
798 EXPECT_THROW(to<bool>(Src("one")), std::range_error);
799 EXPECT_THROW(to<bool>(Src("true_")), std::range_error);
800 EXPECT_THROW(to<bool>(Src("bogus_token_that_is_too_long")),
804 TEST(Conv, StringToBool) {
805 // testStr2Bool<const char *>();
806 testStr2Bool<std::string>();
808 // Test with strings that are not NUL terminated.
809 const char buf[] = "01234";
810 EXPECT_FALSE(to<bool>(StringPiece(buf, buf + 1))); // "0"
811 EXPECT_TRUE(to<bool>(StringPiece(buf + 1, buf + 2))); // "1"
812 const char buf2[] = "one two three";
813 EXPECT_TRUE(to<bool>(StringPiece(buf2, buf2 + 2))); // "on"
814 const char buf3[] = "false";
815 EXPECT_THROW(to<bool>(StringPiece(buf3, buf3 + 3)), // "fal"
818 // Test the StringPiece* API
819 const char buf4[] = "001foo";
820 StringPiece sp4(buf4);
821 EXPECT_TRUE(to<bool>(&sp4));
822 EXPECT_EQ(buf4 + 3, sp4.begin());
823 const char buf5[] = "0012";
824 StringPiece sp5(buf5);
825 EXPECT_THROW(to<bool>(&sp5), std::range_error);
826 EXPECT_EQ(buf5, sp5.begin());
829 TEST(Conv, Transform) {
830 const std::vector<int64_t> in{1, 2, 3};
831 std::vector<std::string> out(in.size());
832 std::transform(in.begin(), in.end(), out.begin(), to<std::string, int64_t>);
833 const std::vector<std::string> ref{"1", "2", "3"};
837 TEST(Conv, FloatToInt) {
838 EXPECT_EQ(to<int>(42.0f), 42);
839 EXPECT_EQ(to<int8_t>(-128.0f), int8_t(-128));
840 EXPECT_THROW(to<int8_t>(-129.0), std::range_error);
841 EXPECT_THROW(to<int8_t>(127.001), std::range_error);
842 EXPECT_THROW(to<uint8_t>(-0.0001), std::range_error);
844 to<uint64_t>(static_cast<float>(std::numeric_limits<uint64_t>::max())),
848 TEST(Conv, IntToFloat) {
849 EXPECT_EQ(to<float>(42ULL), 42.0);
850 EXPECT_EQ(to<float>(int8_t(-128)), -128.0);
852 to<float>(std::numeric_limits<uint64_t>::max()), std::range_error);
854 to<float>(std::numeric_limits<int64_t>::max()), std::range_error);
856 to<float>(std::numeric_limits<int64_t>::min() + 1), std::range_error);
857 #if FOLLY_HAVE_INT128_T
859 to<double>(std::numeric_limits<unsigned __int128>::max()),
862 to<double>(std::numeric_limits<__int128>::max()), std::range_error);
864 to<double>(std::numeric_limits<__int128>::min() + 1), std::range_error);
868 TEST(Conv, BoolToFloat) {
869 EXPECT_EQ(to<double>(true), 1.0);
870 EXPECT_EQ(to<double>(false), 0.0);
873 TEST(Conv, FloatToBool) {
874 EXPECT_EQ(to<bool>(1.0), true);
875 EXPECT_EQ(to<bool>(0.0), false);
876 EXPECT_EQ(to<bool>(2.7), true);
877 EXPECT_EQ(to<bool>(std::numeric_limits<double>::max()), true);
878 EXPECT_EQ(to<bool>(std::numeric_limits<double>::min()), true);
879 EXPECT_EQ(to<bool>(std::numeric_limits<double>::lowest()), true);
880 EXPECT_EQ(to<bool>(std::numeric_limits<double>::quiet_NaN()), true);
881 EXPECT_EQ(to<bool>(std::numeric_limits<double>::infinity()), true);
882 EXPECT_EQ(to<bool>(-std::numeric_limits<double>::infinity()), true);
887 template <typename F>
895 std::string where = to<std::string>(__FILE__, "(", line, "): ");
898 EXPECT_TRUE(false) << where << exprStr << " -> " << res;
899 } catch (const ConversionError& e) {
900 EXPECT_EQ(code, e.errorCode()) << where << exprStr;
901 std::string str(e.what());
902 EXPECT_FALSE(str.empty()) << where << exprStr << " -> " << str;
903 auto pos = str.find(':');
905 std::ostringstream exp;
906 exp << str.substr(0, pos) + ": ";
908 exp << "\"" << value << "\"";
912 EXPECT_EQ(exp.str(), str) << where << exprStr << " -> " << str;
914 EXPECT_EQ(pos, std::string::npos) << where << exprStr << " -> " << str;
920 #define EXPECT_CONV_ERROR_QUOTE(expr, code, value, quoted) \
922 [&] { return expr; }, \
924 ConversionCode::code, \
929 #define EXPECT_CONV_ERROR(expr, code, value) \
930 EXPECT_CONV_ERROR_QUOTE(expr, code, value, true)
932 #define EXPECT_CONV_ERROR_STR(type, str, code) \
933 EXPECT_CONV_ERROR(to<type>(str), code, str)
935 #define EXPECT_CONV_ERROR_STR_NOVAL(type, str, code) \
936 EXPECT_CONV_ERROR(to<type>(str), code, nullptr)
938 TEST(Conv, ConversionErrorStrToBool) {
939 EXPECT_CONV_ERROR_STR_NOVAL(bool, StringPiece(), EMPTY_INPUT_STRING);
940 EXPECT_CONV_ERROR_STR_NOVAL(bool, "", EMPTY_INPUT_STRING);
941 EXPECT_CONV_ERROR_STR(bool, " ", EMPTY_INPUT_STRING);
942 EXPECT_CONV_ERROR_STR(bool, " 11 ", BOOL_OVERFLOW);
943 EXPECT_CONV_ERROR_STR(bool, "other ", BOOL_INVALID_VALUE);
944 EXPECT_CONV_ERROR_STR(bool, " bla", BOOL_INVALID_VALUE);
945 EXPECT_CONV_ERROR(to<bool>(" offbla"), NON_WHITESPACE_AFTER_END, "bla");
948 TEST(Conv, ConversionErrorStrToFloat) {
949 EXPECT_CONV_ERROR_STR_NOVAL(float, StringPiece(), EMPTY_INPUT_STRING);
950 EXPECT_CONV_ERROR_STR_NOVAL(float, "", EMPTY_INPUT_STRING);
951 EXPECT_CONV_ERROR_STR(float, " ", EMPTY_INPUT_STRING);
952 EXPECT_CONV_ERROR_STR(float, " junk", STRING_TO_FLOAT_ERROR);
953 EXPECT_CONV_ERROR(to<float>(" 1bla"), NON_WHITESPACE_AFTER_END, "bla");
956 TEST(Conv, ConversionErrorStrToInt) {
957 // empty string handling
958 EXPECT_CONV_ERROR_STR_NOVAL(int, StringPiece(), EMPTY_INPUT_STRING);
959 EXPECT_CONV_ERROR_STR_NOVAL(int, "", EMPTY_INPUT_STRING);
960 EXPECT_CONV_ERROR_STR(int, " ", EMPTY_INPUT_STRING);
963 EXPECT_CONV_ERROR_STR(int, " *", INVALID_LEADING_CHAR);
964 EXPECT_CONV_ERROR_STR(int, " +", NO_DIGITS);
965 EXPECT_CONV_ERROR_STR(int, " +*", NON_DIGIT_CHAR);
966 EXPECT_CONV_ERROR_STR(int8_t, " 128", POSITIVE_OVERFLOW);
967 EXPECT_CONV_ERROR_STR(int8_t, " -129", NEGATIVE_OVERFLOW);
968 EXPECT_CONV_ERROR_STR(int8_t, " 1000", POSITIVE_OVERFLOW);
969 EXPECT_CONV_ERROR_STR(int8_t, "-1000", NEGATIVE_OVERFLOW);
970 EXPECT_CONV_ERROR(to<int>(" -13bla"), NON_WHITESPACE_AFTER_END, "bla");
973 EXPECT_CONV_ERROR_STR(unsigned, " -", NON_DIGIT_CHAR);
974 EXPECT_CONV_ERROR_STR(uint8_t, " 256", POSITIVE_OVERFLOW);
975 EXPECT_CONV_ERROR(to<unsigned>("42bla"), NON_WHITESPACE_AFTER_END, "bla");
978 #define EXPECT_CONV_ERROR_PP_VAL(type, str, code, val) \
980 StringPiece input(str); \
981 EXPECT_CONV_ERROR(to<type>(input.begin(), input.end()), code, val); \
984 #define EXPECT_CONV_ERROR_PP(type, str, code) \
985 EXPECT_CONV_ERROR_PP_VAL(type, str, code, str)
987 TEST(Conv, ConversionErrorPtrPairToInt) {
989 EXPECT_CONV_ERROR_PP(int, "", INVALID_LEADING_CHAR);
990 EXPECT_CONV_ERROR_PP(int, " ", INVALID_LEADING_CHAR);
991 EXPECT_CONV_ERROR_PP(int, "*", INVALID_LEADING_CHAR);
992 EXPECT_CONV_ERROR_PP(int, "+", NO_DIGITS);
993 EXPECT_CONV_ERROR_PP(int8_t, "128", POSITIVE_OVERFLOW);
994 EXPECT_CONV_ERROR_PP(int8_t, "-129", NEGATIVE_OVERFLOW);
995 EXPECT_CONV_ERROR_PP(int8_t, "1000", POSITIVE_OVERFLOW);
996 EXPECT_CONV_ERROR_PP(int8_t, "-1000", NEGATIVE_OVERFLOW);
997 EXPECT_CONV_ERROR_PP(int, "-junk", NON_DIGIT_CHAR);
1000 EXPECT_CONV_ERROR_PP(unsigned, "", NO_DIGITS);
1001 EXPECT_CONV_ERROR_PP(uint8_t, "256", POSITIVE_OVERFLOW);
1002 EXPECT_CONV_ERROR_PP(unsigned, "junk", NON_DIGIT_CHAR);
1007 template <typename T, typename V>
1008 std::string prefixWithType(V value) {
1009 std::ostringstream oss;
1010 #ifdef FOLLY_HAS_RTTI
1011 oss << "(" << demangle(typeid(T)) << ") ";
1013 oss << to<std::string>(value);
1018 #define EXPECT_CONV_ERROR_ARITH(type, val, code) \
1019 EXPECT_CONV_ERROR_QUOTE( \
1020 to<type>(val), code, prefixWithType<type>(val).c_str(), false)
1022 TEST(Conv, ConversionErrorIntToInt) {
1023 EXPECT_CONV_ERROR_ARITH(signed char, 128, ARITH_POSITIVE_OVERFLOW);
1024 EXPECT_CONV_ERROR_ARITH(unsigned char, -1, ARITH_NEGATIVE_OVERFLOW);
1027 TEST(Conv, ConversionErrorFloatToFloat) {
1028 EXPECT_CONV_ERROR_ARITH(
1029 float, std::numeric_limits<double>::max(), ARITH_POSITIVE_OVERFLOW);
1030 EXPECT_CONV_ERROR_ARITH(
1031 float, std::numeric_limits<double>::lowest(), ARITH_NEGATIVE_OVERFLOW);
1034 TEST(Conv, ConversionErrorIntToFloat) {
1035 EXPECT_CONV_ERROR_ARITH(
1036 float, std::numeric_limits<long long>::max(), ARITH_LOSS_OF_PRECISION);
1039 TEST(Conv, ConversionErrorFloatToInt) {
1040 EXPECT_CONV_ERROR_ARITH(int8_t, 65.5, ARITH_LOSS_OF_PRECISION);
1043 TEST(Conv, TryStringToBool) {
1044 auto rv1 = folly::tryTo<bool>("xxxx");
1045 EXPECT_FALSE(rv1.hasValue());
1046 auto rv2 = folly::tryTo<bool>("false");
1047 EXPECT_TRUE(rv2.hasValue());
1048 EXPECT_FALSE(rv2.value());
1049 auto rv3 = folly::tryTo<bool>("yes");
1050 EXPECT_TRUE(rv3.hasValue());
1051 EXPECT_TRUE(rv3.value());
1054 TEST(Conv, TryStringToInt) {
1055 auto rv1 = folly::tryTo<int>("1000000000000000000000000000000");
1056 EXPECT_FALSE(rv1.hasValue());
1057 auto rv2 = folly::tryTo<int>("4711");
1058 EXPECT_TRUE(rv2.hasValue());
1059 EXPECT_EQ(rv2.value(), 4711);
1062 TEST(Conv, TryStringToFloat) {
1063 auto rv1 = folly::tryTo<float>("");
1064 EXPECT_FALSE(rv1.hasValue());
1065 auto rv2 = folly::tryTo<float>("3.14");
1066 EXPECT_TRUE(rv2.hasValue());
1067 EXPECT_NEAR(rv2.value(), 3.14, 1e-5);
1070 TEST(Conv, TryStringToDouble) {
1071 auto rv1 = folly::tryTo<double>("");
1072 EXPECT_FALSE(rv1.hasValue());
1073 auto rv2 = folly::tryTo<double>("3.14");
1074 EXPECT_TRUE(rv2.hasValue());
1075 EXPECT_NEAR(rv2.value(), 3.14, 1e-10);
1078 TEST(Conv, TryIntToInt) {
1079 auto rv1 = folly::tryTo<uint8_t>(256);
1080 EXPECT_FALSE(rv1.hasValue());
1081 auto rv2 = folly::tryTo<uint8_t>(255);
1082 EXPECT_TRUE(rv2.hasValue());
1083 EXPECT_EQ(rv2.value(), 255);
1086 TEST(Conv, TryFloatToFloat) {
1087 auto rv1 = folly::tryTo<float>(1e100);
1088 EXPECT_FALSE(rv1.hasValue());
1089 auto rv2 = folly::tryTo<double>(25.5f);
1090 EXPECT_TRUE(rv2.hasValue());
1091 EXPECT_NEAR(rv2.value(), 25.5, 1e-10);
1094 TEST(Conv, TryFloatToInt) {
1095 auto rv1 = folly::tryTo<int>(100.001);
1096 EXPECT_FALSE(rv1.hasValue());
1097 auto rv2 = folly::tryTo<int>(100.0);
1098 EXPECT_TRUE(rv2.hasValue());
1099 EXPECT_EQ(rv2.value(), 100);
1102 TEST(Conv, TryIntToFloat) {
1103 auto rv1 = folly::tryTo<float>(std::numeric_limits<uint64_t>::max());
1104 EXPECT_FALSE(rv1.hasValue());
1105 auto rv2 = folly::tryTo<float>(1000ULL);
1106 EXPECT_TRUE(rv2.hasValue());
1107 EXPECT_EQ(rv2.value(), 1000.0f);
1110 TEST(Conv, TryPtrPairToInt) {
1111 StringPiece sp1("1000000000000000000000000000000");
1112 auto rv1 = folly::tryTo<int>(sp1.begin(), sp1.end());
1113 EXPECT_FALSE(rv1.hasValue());
1114 StringPiece sp2("4711");
1115 auto rv2 = folly::tryTo<int>(sp2.begin(), sp2.end());
1116 EXPECT_TRUE(rv2.hasValue());
1117 EXPECT_EQ(rv2.value(), 4711);
1118 StringPiece sp3("-4711");
1119 auto rv3 = folly::tryTo<int>(sp3.begin(), sp3.end());
1120 EXPECT_TRUE(rv3.hasValue());
1121 EXPECT_EQ(rv3.value(), -4711);
1122 StringPiece sp4("4711");
1123 auto rv4 = folly::tryTo<uint16_t>(sp4.begin(), sp4.end());
1124 EXPECT_TRUE(rv4.hasValue());
1125 EXPECT_EQ(rv4.value(), 4711);
1128 TEST(Conv, NewUint64ToString) {
1131 #define THE_GREAT_EXPECTATIONS(n, len) \
1133 EXPECT_EQ((len), uint64ToBufferUnsafe((n), buf)); \
1135 auto s = string(#n); \
1136 s = s.substr(0, s.size() - 2); \
1137 EXPECT_EQ(s, buf); \
1140 THE_GREAT_EXPECTATIONS(0UL, 1);
1141 THE_GREAT_EXPECTATIONS(1UL, 1);
1142 THE_GREAT_EXPECTATIONS(12UL, 2);
1143 THE_GREAT_EXPECTATIONS(123UL, 3);
1144 THE_GREAT_EXPECTATIONS(1234UL, 4);
1145 THE_GREAT_EXPECTATIONS(12345UL, 5);
1146 THE_GREAT_EXPECTATIONS(123456UL, 6);
1147 THE_GREAT_EXPECTATIONS(1234567UL, 7);
1148 THE_GREAT_EXPECTATIONS(12345678UL, 8);
1149 THE_GREAT_EXPECTATIONS(123456789UL, 9);
1150 THE_GREAT_EXPECTATIONS(1234567890UL, 10);
1151 THE_GREAT_EXPECTATIONS(12345678901UL, 11);
1152 THE_GREAT_EXPECTATIONS(123456789012UL, 12);
1153 THE_GREAT_EXPECTATIONS(1234567890123UL, 13);
1154 THE_GREAT_EXPECTATIONS(12345678901234UL, 14);
1155 THE_GREAT_EXPECTATIONS(123456789012345UL, 15);
1156 THE_GREAT_EXPECTATIONS(1234567890123456UL, 16);
1157 THE_GREAT_EXPECTATIONS(12345678901234567UL, 17);
1158 THE_GREAT_EXPECTATIONS(123456789012345678UL, 18);
1159 THE_GREAT_EXPECTATIONS(1234567890123456789UL, 19);
1160 THE_GREAT_EXPECTATIONS(18446744073709551614UL, 20);
1161 THE_GREAT_EXPECTATIONS(18446744073709551615UL, 20);
1163 #undef THE_GREAT_EXPECTATIONS
1166 TEST(Conv, allocate_size) {
1167 std::string str1 = "meh meh meh";
1168 std::string str2 = "zdech zdech zdech";
1170 auto res1 = folly::to<std::string>(str1, ".", str2);
1171 EXPECT_EQ(res1, str1 + "." + str2);
1173 std::string res2; //empty
1174 toAppendFit(str1, str2, 1, &res2);
1175 EXPECT_EQ(res2, str1 + str2 + "1");
1178 toAppendDelimFit(",", str1, str2, &res3);
1179 EXPECT_EQ(res3, str1 + "," + str2);
1185 std::tuple<const int&, const int&> tuple_view() const {
1188 bool operator==(const Dimensions& other) const {
1189 return this->tuple_view() == other.tuple_view();
1193 Expected<StringPiece, ConversionCode> parseTo(
1194 folly::StringPiece in,
1196 return parseTo(in, out.w)
1197 .then([](StringPiece sp) { return sp.removePrefix("x"), sp; })
1198 .then([&](StringPiece sp) { return parseTo(sp, out.h); });
1201 template <class String>
1202 void toAppend(const Dimensions& in, String* result) {
1203 folly::toAppend(in.w, 'x', in.h, result);
1206 size_t estimateSpaceNeeded(const Dimensions&in) {
1207 return 2000 + folly::estimateSpaceNeeded(in.w) +
1208 folly::estimateSpaceNeeded(in.h);
1212 TEST(Conv, custom_kkproviders) {
1213 my::Dimensions expected{7, 8};
1214 EXPECT_EQ(expected, folly::to<my::Dimensions>("7x8"));
1215 auto str = folly::to<std::string>(expected);
1216 EXPECT_EQ("7x8", str);
1217 // make sure above implementation of estimateSpaceNeeded() is used.
1218 EXPECT_GT(str.capacity(), 2000);
1219 EXPECT_LT(str.capacity(), 2500);
1222 TEST(Conv, TryToThenWithVoid) {
1223 auto x = tryTo<int>("42").then([](int) {});
1224 EXPECT_TRUE(x.hasValue());