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Backport cleanup #1385

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5aca9a4
Removed backport of void_t
JohanMabille Jul 20, 2026
dad659f
removed empty file build.rst
JohanMabille Jul 20, 2026
8ec9bca
Removed outdated stuff
JohanMabille Jul 21, 2026
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Empty file removed docs/source/build.rst
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8 changes: 3 additions & 5 deletions include/xsimd/arch/common/xsimd_common_details.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -301,13 +301,11 @@ namespace xsimd
using type = with_slow_conversion;
};

using xsimd::detail::void_t;

template <class A, class From, class To>
struct conversion_type_impl<A, From, To,
void_t<decltype(fast_cast(std::declval<const batch<From, A>&>(),
std::declval<const batch<To, A>&>(),
std::declval<const A&>()))>>
std::void_t<decltype(fast_cast(std::declval<const batch<From, A>&>(),
std::declval<const batch<To, A>&>(),
std::declval<const A&>()))>>
{
using type = with_fast_conversion;
};
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2 changes: 1 addition & 1 deletion include/xsimd/memory/xsimd_alignment.hpp
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Expand Up @@ -74,7 +74,7 @@ namespace xsimd
};

template <class C>
struct container_alignment<C, detail::void_t<typename C::allocator_type>>
struct container_alignment<C, std::void_t<typename C::allocator_type>>
{
using type = allocator_alignment_t<typename C::allocator_type>;
};
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2 changes: 1 addition & 1 deletion include/xsimd/types/xsimd_api.hpp
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Expand Up @@ -371,7 +371,7 @@ namespace xsimd
template <class Arch, class Batch, class BatchConstant>
struct has_bitwise_lshift_batch_const<
Arch, Batch, BatchConstant,
void_t<decltype(kernel::bitwise_lshift<Arch>(
std::void_t<decltype(kernel::bitwise_lshift<Arch>(
std::declval<Batch>(), std::declval<BatchConstant>(), Arch {}))>>
: std::true_type
{
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49 changes: 5 additions & 44 deletions include/xsimd/types/xsimd_utils.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -190,9 +190,8 @@ namespace xsimd
inline To bit_cast(From val) noexcept
{
static_assert(sizeof(From) == sizeof(To), "casting between compatible layout");
// FIXME: Some old version of GCC don't support that trait
// static_assert(std::is_trivially_copyable<From>::value, "input type is trivially copyable");
// static_assert(std::is_trivially_copyable<To>::value, "output type is trivially copyable");
static_assert(std::is_trivially_copyable<From>::value, "input type is trivially copyable");
static_assert(std::is_trivially_copyable<To>::value, "output type is trivially copyable");
To res;
std::memcpy(&res, &val, sizeof(val));
return res;
Expand Down Expand Up @@ -255,19 +254,13 @@ namespace xsimd
} // namespace detail
} // namespace kernel

/*****************************************
* Backport of index_sequence from c++14 *
*****************************************/
/********************************************
* int_sequence and make_sequence_as_bactch *

@serge-sans-paille serge-sans-paille Jul 21, 2026

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typo :-)

********************************************/

// TODO: Remove this once we drop C++11 support
namespace detail
{
template <typename T>
struct identity
{
using type = T;
};

template <int... Is>
using int_sequence = std::integer_sequence<int, Is...>;

Expand All @@ -291,38 +284,6 @@ namespace xsimd
}
}

/*********************************
* Backport of void_t from C++17 *
*********************************/

namespace detail
{
template <class... T>
struct make_void
{
using type = void;
};

template <class... T>
using void_t = typename make_void<T...>::type;
}

/**************************************************
* Equivalent of void_t but with size_t parameter *
**************************************************/

namespace detail
{
template <std::size_t>
struct check_size
{
using type = void;
};

template <std::size_t S>
using check_size_t = typename check_size<S>::type;
}

/*****************************************
* Supplementary std::array constructors *
*****************************************/
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