diff options
author | 2019-01-30 10:59:43 -0800 | |
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committer | 2019-01-30 14:24:09 -0500 | |
commit | a4cb1c8ba61531a63f9d309eea01ac1d43d8371d (patch) | |
tree | 4cd407a27c50ef86e2644af93f117cf5eb2b7bd3 /absl/types/variant_test.cc | |
parent | 540e2537b92cd4abfae6ceddfe24304345461f32 (diff) |
Export of internal Abseil changes.
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6fdf24a197b964f9bacbebd0ceca305aef1654fc by Shaindel Schwartz <shaindel@google.com>:
Internal change
PiperOrigin-RevId: 231627312
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65f7faf52bff01384171efb85fee159378dedf70 by CJ Johnson <johnsoncj@google.com>:
Relocates the definitions of the InputIterator-accepting parts of the InlinedVector API into the top-level. The removed functions had no other callers so there was no reason to keep the layer of indirection in the form of the function call.
PiperOrigin-RevId: 231527459
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30e105b749b5ecc50fdaf26c7da589617efce425 by CJ Johnson <johnsoncj@google.com>:
Relocates closing brace for absl namespace in InlinedVector to the correct end location
PiperOrigin-RevId: 231477871
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063c1e8b9d1f032662c46d574e20ecc357b87d0c by Eric Fiselier <ericwf@google.com>:
Cleanup std::hash probing metafunctions.
Previously there were two different ways to probe for
std::hash. One in hash.h and another in type_traits.h,
and they were both implemented differently, and neither
correctly worked around bad STL implementations.
This patch unifies the implementations into a single IsHashable trait.
It also:
* Correctly checks for old libc++ versions where this won't work.
* Avoids undefined behavior which resulted from calling std::is_constructible
incomplete types.
* Unifies the feature test macro used in the headers and the tests.
Additionally it also slightly changes the behavior of when absl::variant
is hashable. Previously we disable hashing when std::hash<T>()(key) was
formed but when std::hash<T> couldn't be destructed. This seems wrong. If a
user provides a evil specialization of std::hash, then it's OK for variant's
hash to blow up.
PiperOrigin-RevId: 231468345
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05d75dd4b07c893de9b104731644d0d207b01253 by Abseil Team <absl-team@google.com>:
Import of CCTZ from GitHub.
PiperOrigin-RevId: 231397518
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a0ee9032f9e04039f3410ed17fcf45ae1a3868f5 by CJ Johnson <johnsoncj@google.com>:
Remove unused EnableIfAtLeastInputIterator from InlinedVector
PiperOrigin-RevId: 231348903
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4dcd4e9a6780a81d7a6974c7bf22a037e6482b49 by Abseil Team <absl-team@google.com>:
Remove unnecessary register keyword from absl/base/internal/endian.h.
PiperOrigin-RevId: 231316570
--
c8584836caa3a10f90a8604a85d4b831310b72ee by Abseil Team <absl-team@google.com>:
Fix hashtablez_sampler compilation on older Android NDK builds
PiperOrigin-RevId: 231283542
GitOrigin-RevId: 6fdf24a197b964f9bacbebd0ceca305aef1654fc
Change-Id: I185b12fb8347e3ad0ffcb2cbb83a53450e5eb938
Diffstat (limited to 'absl/types/variant_test.cc')
-rw-r--r-- | absl/types/variant_test.cc | 35 |
1 files changed, 11 insertions, 24 deletions
diff --git a/absl/types/variant_test.cc b/absl/types/variant_test.cc index 80e8467e..463d775a 100644 --- a/absl/types/variant_test.cc +++ b/absl/types/variant_test.cc @@ -1977,29 +1977,17 @@ TEST(VariantTest, MonostateHash) { } TEST(VariantTest, Hash) { - static_assert(type_traits_internal::IsHashEnabled<variant<int>>::value, ""); - static_assert(type_traits_internal::IsHashEnabled<variant<Hashable>>::value, + static_assert(type_traits_internal::IsHashable<variant<int>>::value, ""); + static_assert(type_traits_internal::IsHashable<variant<Hashable>>::value, ""); + static_assert(type_traits_internal::IsHashable<variant<int, Hashable>>::value, ""); - static_assert( - type_traits_internal::IsHashEnabled<variant<int, Hashable>>::value, ""); - -#if defined(_MSC_VER) || \ - (defined(_LIBCPP_VERSION) && _LIBCPP_VERSION < 4000 && \ - _LIBCPP_STD_VER > 11) || \ - defined(__APPLE__) - // For MSVC and libc++ (< 4.0 and c++14), std::hash primary template has a - // static_assert to catch any user-defined type T that doesn't provide a hash - // specialization. So instantiating std::hash<variant<T>> will result - // in a hard error which is not SFINAE friendly. -#define ABSL_STD_HASH_NOT_SFINAE_FRIENDLY 1 -#endif -#ifndef ABSL_STD_HASH_NOT_SFINAE_FRIENDLY - static_assert( - !type_traits_internal::IsHashEnabled<variant<NonHashable>>::value, ""); - static_assert(!type_traits_internal::IsHashEnabled< - variant<Hashable, NonHashable>>::value, +#if ABSL_META_INTERNAL_STD_HASH_SFINAE_FRIENDLY_ + static_assert(!type_traits_internal::IsHashable<variant<NonHashable>>::value, ""); + static_assert( + !type_traits_internal::IsHashable<variant<Hashable, NonHashable>>::value, + ""); #endif // MSVC std::hash<std::variant> does not use the index, thus produce the same @@ -2023,11 +2011,10 @@ TEST(VariantTest, Hash) { EXPECT_GT(hashcodes.size(), 90); // test const-qualified + static_assert(type_traits_internal::IsHashable<variant<const int>>::value, + ""); static_assert( - type_traits_internal::IsHashEnabled<variant<const int>>::value, ""); - static_assert( - type_traits_internal::IsHashEnabled<variant<const Hashable>>::value, - ""); + type_traits_internal::IsHashable<variant<const Hashable>>::value, ""); std::hash<absl::variant<const int>> c_hash; for (int i = 0; i < 100; ++i) { EXPECT_EQ(hash(i), c_hash(i)); |