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Merge pull request #813 from JordanMaples/dev/jomaples/deprecate_multispan

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Deprecate multi_span, strided_span, etc
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Jordan Maples [MSFT] 2019-10-09 15:11:59 -07:00 committed by GitHub
commit 3d56ba9e7f
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4 changed files with 151 additions and 141 deletions
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198
include/gsl/multi_span
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@ -23,7 +23,6 @@
#include <algorithm> // for transform, lexicographical_compare
#include <array> // for array
#include <cassert>
#include <cstddef> // for ptrdiff_t, size_t, nullptr_t
#include <cstdint> // for PTRDIFF_MAX
#include <functional> // for divides, multiplies, minus, negate, plus
@ -49,6 +48,7 @@
#pragma warning(disable : 26473) // in some instantiations we cast to the same type
#pragma warning(disable : 26490) // TODO: bug in parser - attributes and templates
#pragma warning(disable : 26465) // TODO: bug - suppression does not work on template functions
#pragma warning(disable : 4996) // use of function or classes marked [[deprecated]]
#if _MSC_VER < 1910
#pragma push_macro("constexpr")
@ -57,6 +57,11 @@
#endif // _MSC_VER < 1910
#endif // _MSC_VER
#if __clang__ || __GNUC__
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
#endif
// GCC 7 does not like the signed unsigned missmatch (size_t ptrdiff_t)
// While there is a conversion from signed to unsigned, it happens at
// compiletime, so the compiler wouldn't have to warn indiscriminently, but
@ -76,18 +81,18 @@ namespace gsl
namespace details
{
template <typename SizeType>
struct SizeTypeTraits
struct [[deprecated]] SizeTypeTraits
{
static const SizeType max_value = std::numeric_limits<SizeType>::max();
};
template <typename... Ts>
class are_integral : public std::integral_constant<bool, true>
class [[deprecated]] are_integral : public std::integral_constant<bool, true>
{
};
template <typename T, typename... Ts>
class are_integral<T, Ts...>
class [[deprecated]] are_integral<T, Ts...>
: public std::integral_constant<bool,
std::is_integral<T>::value && are_integral<Ts...>::value>
{
@ -95,8 +100,7 @@ namespace details
} // namespace details
template <std::size_t Rank>
class multi_span_index final
{
class [[deprecated]] multi_span_index final {
static_assert(Rank > 0, "Rank must be greater than 0!");
template <std::size_t OtherRank>
@ -152,10 +156,7 @@ public:
return std::equal(elems, elems + rank, rhs.elems);
}
constexpr bool operator!=(const multi_span_index& rhs) const
{
return !(*this == rhs);
}
constexpr bool operator!=(const multi_span_index& rhs) const { return !(*this == rhs); }
constexpr multi_span_index operator+() const noexcept { return *this; }
@ -184,8 +185,7 @@ public:
{
GSL_SUPPRESS(bounds.1) // NO-FORMAT: attribute
GSL_SUPPRESS(bounds.3) // NO-FORMAT: attribute
std::transform(elems, elems + rank, rhs.elems, elems,
std::plus<value_type>{});
std::transform(elems, elems + rank, rhs.elems, elems, std::plus<value_type>{});
return *this;
}
@ -240,7 +240,7 @@ private:
#if !defined(_MSC_VER) || _MSC_VER >= 1910
struct static_bounds_dynamic_range_t
struct [[deprecated]] static_bounds_dynamic_range_t
{
template <typename T, typename = std::enable_if_t<std::is_integral<T>::value>>
constexpr operator T() const noexcept
@ -288,25 +288,22 @@ constexpr static_bounds_dynamic_range_t dynamic_range{};
const std::ptrdiff_t dynamic_range = -1;
#endif
struct generalized_mapping_tag
{
};
struct contiguous_mapping_tag : generalized_mapping_tag
struct [[deprecated]] generalized_mapping_tag
{
};
struct[[deprecated]] contiguous_mapping_tag : generalized_mapping_tag{};
namespace details
{
template <std::ptrdiff_t Left, std::ptrdiff_t Right>
struct LessThan
struct [[deprecated]] LessThan
{
static const bool value = Left < Right;
};
template <std::ptrdiff_t... Ranges>
struct BoundsRanges
{
struct [[deprecated]] BoundsRanges {
using size_type = std::ptrdiff_t;
static const size_type Depth = 0;
static const size_type DynamicNum = 0;
@ -345,7 +342,7 @@ namespace details
};
template <std::ptrdiff_t... RestRanges>
struct BoundsRanges<dynamic_range, RestRanges...> : BoundsRanges<RestRanges...>
struct[[deprecated]] BoundsRanges<dynamic_range, RestRanges...> : BoundsRanges<RestRanges...>
{
using Base = BoundsRanges<RestRanges...>;
using size_type = std::ptrdiff_t;
@ -358,7 +355,8 @@ namespace details
size_type m_bound;
public:
GSL_SUPPRESS(f.23) // NO-FORMAT: attribute // this pointer type is cannot be assigned nullptr - issue in not_null
GSL_SUPPRESS(
f.23) // NO-FORMAT: attribute // this pointer type is cannot be assigned nullptr - issue in not_null
GSL_SUPPRESS(bounds.1) // NO-FORMAT: attribute
constexpr BoundsRanges(const std::ptrdiff_t* const arr)
: Base(arr + 1), m_bound(*arr * this->Base::totalSize())
@ -400,19 +398,19 @@ namespace details
return cur < m_bound ? cur + last : -1;
}
GSL_SUPPRESS(c.128) // NO-FORMAT: attribute // no pointers to BoundsRanges should be ever used
constexpr size_type totalSize() const noexcept
{
return m_bound;
}
GSL_SUPPRESS(
c.128) // NO-FORMAT: attribute // no pointers to BoundsRanges should be ever used
constexpr size_type totalSize() const noexcept { return m_bound; }
GSL_SUPPRESS(c.128) // NO-FORMAT: attribute // no pointers to BoundsRanges should be ever used
GSL_SUPPRESS(
c.128) // NO-FORMAT: attribute // no pointers to BoundsRanges should be ever used
constexpr size_type elementNum() const noexcept
{
return totalSize() / this->Base::totalSize();
}
GSL_SUPPRESS(c.128) // NO-FORMAT: attribute // no pointers to BoundsRanges should be ever used
GSL_SUPPRESS(
c.128) // NO-FORMAT: attribute // no pointers to BoundsRanges should be ever used
constexpr size_type elementNum(std::size_t dim) const noexcept
{
if (dim > 0)
@ -429,7 +427,7 @@ namespace details
};
template <std::ptrdiff_t CurRange, std::ptrdiff_t... RestRanges>
struct BoundsRanges<CurRange, RestRanges...> : BoundsRanges<RestRanges...>
struct[[deprecated]] BoundsRanges<CurRange, RestRanges...> : BoundsRanges<RestRanges...>
{
using Base = BoundsRanges<RestRanges...>;
using size_type = std::ptrdiff_t;
@ -465,8 +463,7 @@ namespace details
Expects(arr[Dim] >= 0 && arr[Dim] < CurrentRange); // Index is out of range
GSL_SUPPRESS(bounds.4) // NO-FORMAT: attribute
const ptrdiff_t d = arr[Dim];
return this->Base::totalSize() * d +
this->Base::template linearize<T, Dim + 1>(arr);
return this->Base::totalSize() * d + this->Base::template linearize<T, Dim + 1>(arr);
}
template <typename T, std::size_t Dim = 0>
@ -478,19 +475,19 @@ namespace details
return this->Base::totalSize() * arr[Dim] + last;
}
GSL_SUPPRESS(c.128) // NO-FORMAT: attribute // no pointers to BoundsRanges should be ever used
GSL_SUPPRESS(
c.128) // NO-FORMAT: attribute // no pointers to BoundsRanges should be ever used
constexpr size_type totalSize() const noexcept
{
return CurrentRange * this->Base::totalSize();
}
GSL_SUPPRESS(c.128) // NO-FORMAT: attribute // no pointers to BoundsRanges should be ever used
constexpr size_type elementNum() const noexcept
{
return CurrentRange;
}
GSL_SUPPRESS(
c.128) // NO-FORMAT: attribute // no pointers to BoundsRanges should be ever used
constexpr size_type elementNum() const noexcept { return CurrentRange; }
GSL_SUPPRESS(c.128) // NO-FORMAT: attribute // no pointers to BoundsRanges should be ever used
GSL_SUPPRESS(
c.128) // NO-FORMAT: attribute // no pointers to BoundsRanges should be ever used
constexpr size_type elementNum(std::size_t dim) const noexcept
{
if (dim > 0)
@ -506,17 +503,14 @@ namespace details
};
template <typename SourceType, typename TargetType>
struct BoundsRangeConvertible
struct[[deprecated]] BoundsRangeConvertible
: public std::integral_constant<bool, (SourceType::TotalSize >= TargetType::TotalSize ||
TargetType::TotalSize == dynamic_range ||
SourceType::TotalSize == dynamic_range ||
TargetType::TotalSize == 0)>
{
};
TargetType::TotalSize == 0)>{};
template <typename TypeChain>
struct TypeListIndexer
{
struct [[deprecated]] TypeListIndexer {
const TypeChain& obj_;
constexpr TypeListIndexer(const TypeChain& obj) : obj_(obj) {}
@ -562,17 +556,16 @@ namespace details
} // namespace details
template <typename IndexType>
class bounds_iterator;
class [[deprecated]] bounds_iterator;
template <std::ptrdiff_t... Ranges>
class static_bounds
{
class [[deprecated]] static_bounds {
public:
static_bounds(const details::BoundsRanges<Ranges...>&) {}
};
template <std::ptrdiff_t FirstRange, std::ptrdiff_t... RestRanges>
class static_bounds<FirstRange, RestRanges...>
class[[deprecated]] static_bounds<FirstRange, RestRanges...>
{
using MyRanges = details::BoundsRanges<FirstRange, RestRanges...>;
@ -724,10 +717,7 @@ public:
return !(*this == rhs);
}
constexpr const_iterator begin() const noexcept
{
return const_iterator(*this, index_type{});
}
constexpr const_iterator begin() const noexcept { return const_iterator(*this, index_type{}); }
constexpr const_iterator end() const noexcept
{
@ -736,7 +726,7 @@ public:
};
template <std::size_t Rank>
class strided_bounds {
class [[deprecated]] strided_bounds {
template <std::size_t OtherRank>
friend class strided_bounds;
@ -766,8 +756,7 @@ public:
constexpr strided_bounds(const index_type& extents, const index_type& strides) noexcept
: m_extents(extents), m_strides(strides)
{
}
{}
constexpr index_type strides() const noexcept { return m_strides; }
@ -839,21 +828,14 @@ private:
};
template <typename T>
struct is_bounds : std::integral_constant<bool, false>
{
};
struct[[deprecated]] is_bounds : std::integral_constant<bool, false>{};
template <std::ptrdiff_t... Ranges>
struct is_bounds<static_bounds<Ranges...>> : std::integral_constant<bool, true>
{
};
struct[[deprecated]] is_bounds<static_bounds<Ranges...>> : std::integral_constant<bool, true>{};
template <std::size_t Rank>
struct is_bounds<strided_bounds<Rank>> : std::integral_constant<bool, true>
{
};
struct[[deprecated]] is_bounds<strided_bounds<Rank>> : std::integral_constant<bool, true>{};
template <typename IndexType>
class bounds_iterator
{
class [[deprecated]] bounds_iterator {
public:
static const std::size_t rank = IndexType::rank;
using iterator_category = std::random_access_iterator_tag;
@ -974,7 +956,6 @@ public:
return curr_ == rhs.curr_;
}
constexpr bool operator!=(const bounds_iterator& rhs) const noexcept { return !(*this == rhs); }
constexpr bool operator<(const bounds_iterator& rhs) const noexcept
@ -995,7 +976,6 @@ public:
}
private:
GSL_SUPPRESS(bounds.4) // NO-FORMAT: attribute
constexpr bool less(index_type & one, index_type & other) const noexcept
{
@ -1092,17 +1072,17 @@ namespace details
} // namespace details
template <typename Span>
class contiguous_span_iterator;
class [[deprecated]] contiguous_span_iterator;
template <typename Span>
class general_span_iterator;
class [[deprecated]] general_span_iterator;
template <std::ptrdiff_t DimSize = dynamic_range>
struct dim_t
struct [[deprecated]] dim_t
{
static const std::ptrdiff_t value = DimSize;
};
template <>
struct dim_t<dynamic_range>
struct [[deprecated]] dim_t<dynamic_range>
{
static const std::ptrdiff_t value = dynamic_range;
const std::ptrdiff_t dvalue;
@ -1123,28 +1103,30 @@ constexpr dim_t<N> dim(std::ptrdiff_t n) noexcept
template <typename ValueType, std::ptrdiff_t FirstDimension = dynamic_range,
std::ptrdiff_t... RestDimensions>
class multi_span;
class [[deprecated("gsl::multi_span is deprecated because it is not in the C++ Core Guidelines")]] multi_span;
template <typename ValueType, std::size_t Rank>
class strided_span;
class [[deprecated("gsl::strided_span is deprecated because it is not in the C++ Core Guidelines")]] strided_span;
namespace details
{
template <typename T, typename = std::true_type>
struct SpanTypeTraits
struct [[deprecated]] SpanTypeTraits
{
using value_type = T;
using size_type = std::size_t;
};
template <typename Traits>
struct SpanTypeTraits<Traits, typename std::is_reference<typename Traits::span_traits&>::type>
struct [[deprecated]] SpanTypeTraits<
Traits, typename std::is_reference<typename Traits::span_traits&>::type>
{
using value_type = typename Traits::span_traits::value_type;
using size_type = typename Traits::span_traits::size_type;
};
template <typename T, std::ptrdiff_t... Ranks>
struct SpanArrayTraits
struct [[deprecated]] SpanArrayTraits
{
using type = multi_span<T, Ranks...>;
using value_type = T;
@ -1153,7 +1135,7 @@ namespace details
using reference = T&;
};
template <typename T, std::ptrdiff_t N, std::ptrdiff_t... Ranks>
struct SpanArrayTraits<T[N], Ranks...> : SpanArrayTraits<T, Ranks..., N>
struct [[deprecated]] SpanArrayTraits<T[N], Ranks...> : SpanArrayTraits<T, Ranks..., N>
{
};
@ -1177,7 +1159,7 @@ namespace details
totalSize, std::integral_constant<bool, BoundsType::dynamic_rank == 1>());
}
struct Sep
struct [[deprecated]] Sep
{
};
@ -1200,36 +1182,35 @@ namespace details
}
template <typename... Dimensions>
struct static_as_multi_span_static_bounds_helper
struct [[deprecated]] static_as_multi_span_static_bounds_helper
{
using type = static_bounds<(Dimensions::value)...>;
};
template <typename T>
struct is_multi_span_oracle : std::false_type
struct [[deprecated]] is_multi_span_oracle : std::false_type
{
};
template <typename ValueType, std::ptrdiff_t FirstDimension, std::ptrdiff_t... RestDimensions>
struct is_multi_span_oracle<multi_span<ValueType, FirstDimension, RestDimensions...>>
struct [[deprecated]] is_multi_span_oracle<multi_span<ValueType, FirstDimension, RestDimensions...>>
: std::true_type
{
};
template <typename ValueType, std::ptrdiff_t Rank>
struct is_multi_span_oracle<strided_span<ValueType, Rank>> : std::true_type
struct [[deprecated]] is_multi_span_oracle<strided_span<ValueType, Rank>> : std::true_type
{
};
template <typename T>
struct is_multi_span : is_multi_span_oracle<std::remove_cv_t<T>>
struct [[deprecated]] is_multi_span : is_multi_span_oracle<std::remove_cv_t<T>>
{
};
} // namespace details
template <typename ValueType, std::ptrdiff_t FirstDimension, std::ptrdiff_t... RestDimensions>
class multi_span
{
class [[deprecated("gsl::multi_span is deprecated because it is not in the C++ Core Guidelines")]] multi_span {
// TODO do we still need this?
template <typename ValueType2, std::ptrdiff_t FirstDimension2,
std::ptrdiff_t... RestDimensions2>
@ -1262,8 +1243,7 @@ private:
public:
// default constructor - same as constructing from nullptr_t
GSL_SUPPRESS(type.6) // NO-FORMAT: attribute // TODO: false positive
constexpr multi_span() noexcept
: multi_span(nullptr, bounds_type{})
constexpr multi_span() noexcept : multi_span(nullptr, bounds_type{})
{
static_assert(bounds_type::dynamic_rank != 0 ||
(bounds_type::dynamic_rank == 0 && bounds_type::static_size == 0),
@ -1273,8 +1253,7 @@ public:
// construct from nullptr - get an empty multi_span
GSL_SUPPRESS(type.6) // NO-FORMAT: attribute // TODO: false positive
constexpr multi_span(std::nullptr_t) noexcept
: multi_span(nullptr, bounds_type{})
constexpr multi_span(std::nullptr_t) noexcept : multi_span(nullptr, bounds_type{})
{
static_assert(bounds_type::dynamic_rank != 0 ||
(bounds_type::dynamic_rank == 0 && bounds_type::static_size == 0),
@ -1298,8 +1277,7 @@ public:
// construct from a single element
GSL_SUPPRESS(type.6) // NO-FORMAT: attribute // TODO: false positive
constexpr multi_span(reference data) noexcept
: multi_span(&data, bounds_type{1})
constexpr multi_span(reference data) noexcept : multi_span(&data, bounds_type{1})
{
static_assert(bounds_type::dynamic_rank > 0 || bounds_type::static_size == 0 ||
bounds_type::static_size == 1,
@ -1312,13 +1290,10 @@ public:
// construct from pointer + length
GSL_SUPPRESS(type.6) // NO-FORMAT: attribute // TODO: false positive
constexpr multi_span(pointer ptr, size_type size)
: multi_span(ptr, bounds_type{size})
{}
constexpr multi_span(pointer ptr, size_type size) : multi_span(ptr, bounds_type{size}) {}
// construct from pointer + length - multidimensional
constexpr multi_span(pointer data, bounds_type bounds)
: data_(data), bounds_(std::move(bounds))
constexpr multi_span(pointer data, bounds_type bounds) : data_(data), bounds_(std::move(bounds))
{
Expects((bounds_.size() > 0 && data != nullptr) || bounds_.size() == 0);
}
@ -1493,8 +1468,7 @@ public:
}
// section - creates a non-contiguous, strided multi_span from a contiguous one
constexpr strided_span<ValueType, Rank> section(index_type origin,
index_type extents) const
constexpr strided_span<ValueType, Rank> section(index_type origin, index_type extents) const
{
const size_type size = this->bounds().total_size() - this->bounds().linearize(origin);
return {&this->operator[](origin), size,
@ -1636,8 +1610,8 @@ public:
template <typename OtherValueType, std::ptrdiff_t... OtherDimensions,
typename = std::enable_if_t<std::is_same<std::remove_cv_t<value_type>,
std::remove_cv_t<OtherValueType>>::value>>
constexpr bool operator>(const multi_span<OtherValueType, OtherDimensions...>& other) const
noexcept
constexpr bool operator>(const multi_span<OtherValueType, OtherDimensions...>& other)
const noexcept
{
return (other < *this);
}
@ -1673,7 +1647,8 @@ constexpr auto as_multi_span(SpanType s, Dimensions2... dims)
// convert a multi_span<T> to a multi_span<const byte>
template <typename U, std::ptrdiff_t... Dimensions>
multi_span<const byte, dynamic_range> as_bytes(multi_span<U, Dimensions...> s) noexcept
multi_span<const byte, dynamic_range>
as_bytes(multi_span<U, Dimensions...> s) noexcept
{
static_assert(std::is_trivial<std::decay_t<U>>::value,
"The value_type of multi_span must be a trivial type.");
@ -1759,7 +1734,8 @@ constexpr auto as_multi_span(T* arr, std::ptrdiff_t len) ->
}
template <typename T, std::size_t N>
constexpr auto as_multi_span(T (&arr)[N]) -> typename details::SpanArrayTraits<T, N>::type
constexpr auto as_multi_span(T (&arr)[N]) ->
typename details::SpanArrayTraits<T, N>::type
{
return {arr};
}
@ -1812,7 +1788,7 @@ constexpr auto as_multi_span(std::basic_string<CharT, Traits, Allocator>& str)
// strided_span is an extension that is not strictly part of the GSL at this time.
// It is kept here while the multidimensional interface is still being defined.
template <typename ValueType, std::size_t Rank>
class strided_span
class [[deprecated("gsl::strided_span is deprecated because it is not in the C++ Core Guidelines")]] strided_span
{
public:
using bounds_type = strided_bounds<Rank>;
@ -2055,8 +2031,7 @@ private:
};
template <class Span>
class contiguous_span_iterator
{
class [[deprecated]] contiguous_span_iterator {
public:
using iterator_category = std::random_access_iterator_tag;
using value_type = typename Span::value_type;
@ -2072,7 +2047,8 @@ private:
const Span* m_validator;
GSL_SUPPRESS(bounds.1) // NO-FORMAT: attribute
void validateThis() const {
void validateThis() const
{
// iterator is out of range of the array
Expects(data_ >= m_validator->data_ && data_ < m_validator->data_ + m_validator->size());
}
@ -2176,7 +2152,7 @@ contiguous_span_iterator<Span> operator+(typename contiguous_span_iterator<Span>
}
template <typename Span>
class general_span_iterator {
class [[deprecated]] general_span_iterator {
public:
using iterator_category = std::random_access_iterator_tag;
using value_type = typename Span::value_type;
@ -2290,4 +2266,8 @@ general_span_iterator<Span> operator+(typename general_span_iterator<Span>::diff
#pragma GCC diagnostic pop
#endif // __GNUC__ > 6
#if __clang__ || __GNUC__
#pragma GCC diagnostic pop
#endif
#endif // GSL_MULTI_SPAN_H

10
tests/bounds_tests.cpp
View File

@ -18,6 +18,12 @@
// blanket turn off warnings from CppCoreCheck from catch
// so people aren't annoyed by them when running the tool.
#pragma warning(disable : 26440 26426) // from catch
#pragma warning(disable : 4996) // use of function or classes marked [[deprecated]]
#endif
#if __clang__ || __GNUC__
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
#endif
#include <catch/catch.hpp> // for AssertionHandler, StringRef, TEST_CASE
@ -113,3 +119,7 @@ TEST_CASE("bounds_convertible")
#ifdef CONFIRM_COMPILATION_ERRORS
copy(src_span_static, dst_span_static);
#endif
#if __clang__ || __GNUC__
#pragma GCC diagnostic pop
#endif

10
tests/multi_span_tests.cpp
View File

@ -18,7 +18,13 @@
// blanket turn off warnings from CppCoreCheck from catch
// so people aren't annoyed by them when running the tool.
#pragma warning(disable : 26440 26426) // from catch
#pragma warning(disable : 4996) // multi_span is in the process of being deprecated.
// Suppressing warnings until it is completely removed
#endif
#if __clang__ || __GNUC__
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
#endif
#include <catch/catch.hpp> // for AssertionHandler, StringRef, CHECK, CHECK...
@ -1787,3 +1793,7 @@ TEST_CASE("iterator")
#ifdef CONFIRM_COMPILATION_ERRORS
copy(src_span_static, dst_span_static);
#endif
#if __clang__ || __GNUC__
#pragma GCC diagnostic pop
#endif

12
tests/strided_span_tests.cpp
View File

@ -17,8 +17,14 @@
#ifdef _MSC_VER
// blanket turn off warnings from CppCoreCheck from catch
// so people aren't annoyed by them when running the tool.
#pragma warning(disable : 26440 26426) // from catch
#pragma warning(disable : 26440 26426) // from catch deprecated
#pragma warning(disable : 4996) // strided_span is in the process of being deprecated.
// Suppressing warnings until it is completely removed
#endif
#if __clang__ || __GNUC__
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
#endif
#include <catch/catch.hpp> // for AssertionHandler, StringRef, CHECK, CHECK...
@ -794,3 +800,7 @@ TEST_CASE("strided_span_conversion")
i++;
}
}
#if __clang__ || __GNUC__
#pragma GCC diagnostic pop
#endif