[gtest] Use std::index_sequence and friends instead of rolling our own

* Applies for `std::index_sequence`, `std::make_index_sequence`, and `std::index_sequence_for` replacing `IndexSequence`, `MakeIndexSequence` and IndexSequenceFor`
* Also deleted implementation helper `DoubleSequence`
* The standard interfaces [have been in the standard library since C++14](https://en.cppreference.com/w/cpp/utility/integer_sequence), which [is the minimum supported C++ version by Google Test](https://github.com/google/oss-policies-info/blob/main/foundational-cxx-support-matrix.md)

PiperOrigin-RevId: 621939977
Change-Id: Id264266f08da66c0fa2a6e6fbb8f86fd3cb3a421
This commit is contained in:
Lawrence Wolf-Sonkin
2024-04-04 12:37:50 -07:00
committed by Copybara-Service
parent 61db1e1740
commit 0af976647f
7 changed files with 56 additions and 103 deletions

View File

@@ -2135,13 +2135,13 @@ struct ActionImpl<R(Args...), Impl> : ImplBase<Impl>::type {
R operator()(Args&&... arg) const {
static constexpr size_t kMaxArgs =
sizeof...(Args) <= 10 ? sizeof...(Args) : 10;
return Apply(MakeIndexSequence<kMaxArgs>{},
MakeIndexSequence<10 - kMaxArgs>{},
return Apply(std::make_index_sequence<kMaxArgs>{},
std::make_index_sequence<10 - kMaxArgs>{},
args_type{std::forward<Args>(arg)...});
}
template <std::size_t... arg_id, std::size_t... excess_id>
R Apply(IndexSequence<arg_id...>, IndexSequence<excess_id...>,
R Apply(std::index_sequence<arg_id...>, std::index_sequence<excess_id...>,
const args_type& args) const {
// Impl need not be specific to the signature of action being implemented;
// only the implementing function body needs to have all of the specific