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Export of internal Abseil changes.

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7672429b51fa4edc9e2386f3d6ead89a33e523c0 by Xiaoyi Zhang <zhangxy@google.com>:

Work around a bug in MSVC 2015 which causes compiler error when building
variant_test with inline namespace for the LTS release.
The bug is reduced to https://godbolt.org/g/hvqDVz.

PiperOrigin-RevId: 201343049

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dfe4f3869aa4b70dda69631816103e7b2c53c593 by Shaindel Schwartz <shaindel@google.com>:

Update date for LTS branch.

PiperOrigin-RevId: 201335133

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9a8f41ddd0c75d5d2746141f61ba5736cfbde494 by Abseil Team <absl-team@google.com>:

Update bazel_toolchains to the latest commit.

PiperOrigin-RevId: 201231595

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f6d5d5d08e638424073d0bc31bb4ed4d1ef512e2 by Tom Manshreck <shreck@google.com>:

Fix LTS wording, move to top level

PiperOrigin-RevId: 201054433
GitOrigin-RevId: 7672429b51fa4edc9e2386f3d6ead89a33e523c0
Change-Id: Id63a986870993889258f6364634a7880d226d187
This commit is contained in:
Abseil Team 2018-06-20 06:25:23 -07:00 • committed by Shaindel Schwartz
parent bd40a41cc1
commit d89dba27e3
4 changed files with 29 additions and 36 deletions
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6
absl/types/variant.h
View file

@ -445,9 +445,11 @@ constexpr bool operator!=(monostate, monostate) noexcept { return false; }
//------------------------------------------------------------------------------
template <typename T0, typename... Tn>
class variant<T0, Tn...> : private variant_internal::VariantBase<T0, Tn...> {
// Intentionally not qualifing `negation` with `absl::` to work around a bug
// in MSVC 2015 with inline namespace and variadic template.
static_assert(absl::conjunction<std::is_object<T0>, std::is_object<Tn>...,
absl::negation<std::is_array<T0>>,
absl::negation<std::is_array<Tn>>...,
negation<std::is_array<T0> >,
negation<std::is_array<Tn> >...,
std::is_nothrow_destructible<T0>,
std::is_nothrow_destructible<Tn>...>::value,
"Attempted to instantiate a variant with an unsupported type.");