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Applied clang-format to the source.

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This commit is contained in:
Neil MacIntosh 2016-07-20 13:17:47 -07:00
parent ca4cdd80de
commit b03b04bfcd
8 changed files with 964 additions and 893 deletions
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2
.clang-format
View File

@ -16,6 +16,6 @@ AllowShortLoopsOnASingleLine: true
PointerAlignment: Left
AlignConsecutiveAssignments: false
AlignTrailingComments: false
AlignTrailingComments: true
SpaceAfterCStyleCast: true

43
include/gsl.h
View File

@ -21,8 +21,8 @@
#include "gsl_assert.h" // Ensures/Expects
#include "gsl_util.h" // finally()/narrow()/narrow_cast()...
#include "span.h" // span
#include "multi_span.h" // multi_span, strided_span...
#include "span.h" // span
#include "string_span.h" // zstring, string_span, zstring_builder...
#include <memory>
@ -40,13 +40,12 @@
// turn off some misguided warnings
#pragma warning(push)
#pragma warning(disable: 4351) // warns about newly introduced aggregate initializer behavior
#pragma warning(disable : 4351) // warns about newly introduced aggregate initializer behavior
#endif // _MSC_VER <= 1800
#endif // _MSC_VER
namespace gsl
{
@ -59,7 +58,6 @@ using std::shared_ptr;
template <class T>
using owner = T;
//
// not_null
//
@ -74,25 +72,31 @@ using owner = T;
// - ensure construction from U* fails with nullptr
// - allow implicit conversion to U*
//
template<class T>
template <class T>
class not_null
{
static_assert(std::is_assignable<T&, std::nullptr_t>::value, "T cannot be assigned nullptr.");
public:
not_null(T t) : ptr_(t) { ensure_invariant(); }
not_null& operator=(const T& t) { ptr_ = t; ensure_invariant(); return *this; }
not_null& operator=(const T& t)
{
ptr_ = t;
ensure_invariant();
return *this;
}
not_null(const not_null &other) = default;
not_null& operator=(const not_null &other) = default;
not_null(const not_null& other) = default;
not_null& operator=(const not_null& other) = default;
template <typename U, typename Dummy = std::enable_if_t<std::is_convertible<U, T>::value>>
not_null(const not_null<U> &other)
not_null(const not_null<U>& other)
{
*this = other;
}
template <typename U, typename Dummy = std::enable_if_t<std::is_convertible<U, T>::value>>
not_null& operator=(const not_null<U> &other)
not_null& operator=(const not_null<U>& other)
{
ptr_ = other.get();
return *this;
@ -104,7 +108,8 @@ public:
not_null<T>& operator=(std::nullptr_t) = delete;
not_null<T>& operator=(int) = delete;
T get() const {
T get() const
{
#ifdef _MSC_VER
__assume(ptr_ != nullptr);
#endif
@ -119,7 +124,8 @@ public:
private:
T ptr_;
// we assume that the compiler can hoist/prove away most of the checks inlined from this function
// we assume that the compiler can hoist/prove away most of the checks inlined from this
// function
// if not, we could make them optional via conditional compilation
void ensure_invariant() const { Expects(ptr_ != nullptr); }
@ -139,14 +145,11 @@ private:
namespace std
{
template<class T>
struct hash<gsl::not_null<T>>
{
size_t operator()(const gsl::not_null<T> & value) const
{
return hash<T>{}(value);
}
};
template <class T>
struct hash<gsl::not_null<T>>
{
size_t operator()(const gsl::not_null<T>& value) const { return hash<T>{}(value); }
};
} // namespace std

24
include/gsl_assert.h
View File

@ -30,15 +30,14 @@
// 2. GSL_THROW_ON_CONTRACT_VIOLATION: a gsl::fail_fast exception will be thrown
// 3. GSL_UNENFORCED_ON_CONTRACT_VIOLATION: nothing happens
//
#if !(defined(GSL_THROW_ON_CONTRACT_VIOLATION) ^ defined(GSL_TERMINATE_ON_CONTRACT_VIOLATION) ^ defined(GSL_UNENFORCED_ON_CONTRACT_VIOLATION))
#if !(defined(GSL_THROW_ON_CONTRACT_VIOLATION) ^ defined(GSL_TERMINATE_ON_CONTRACT_VIOLATION) ^ \
defined(GSL_UNENFORCED_ON_CONTRACT_VIOLATION))
#define GSL_TERMINATE_ON_CONTRACT_VIOLATION
#endif
#define GSL_STRINGIFY_DETAIL(x) #x
#define GSL_STRINGIFY(x) GSL_STRINGIFY_DETAIL(x)
//
// GSL.assert: assertions
//
@ -53,18 +52,20 @@ struct fail_fast : public std::runtime_error
#if defined(GSL_THROW_ON_CONTRACT_VIOLATION)
#define Expects(cond) if (!(cond)) \
#define Expects(cond) \
if (!(cond)) \
throw gsl::fail_fast("GSL: Precondition failure at " __FILE__ ": " GSL_STRINGIFY(__LINE__));
#define Ensures(cond) if (!(cond)) \
throw gsl::fail_fast("GSL: Postcondition failure at " __FILE__ ": " GSL_STRINGIFY(__LINE__));
#define Ensures(cond) \
if (!(cond)) \
throw gsl::fail_fast("GSL: Postcondition failure at " __FILE__ \
": " GSL_STRINGIFY(__LINE__));
#elif defined(GSL_TERMINATE_ON_CONTRACT_VIOLATION)
#define Expects(cond) if (!(cond)) std::terminate();
#define Ensures(cond) if (!(cond)) std::terminate();
#define Expects(cond) \
if (!(cond)) std::terminate();
#define Ensures(cond) \
if (!(cond)) std::terminate();
#elif defined(GSL_UNENFORCED_ON_CONTRACT_VIOLATION)
@ -73,5 +74,4 @@ struct fail_fast : public std::runtime_error
#endif
#endif // GSL_CONTRACTS_H

88
include/gsl_byte.h
View File

@ -38,54 +38,76 @@
namespace gsl
{
// This is a simple definition for now that allows
// use of byte within span<> to be standards-compliant
enum class byte : unsigned char {};
// This is a simple definition for now that allows
// use of byte within span<> to be standards-compliant
enum class byte : unsigned char
{
};
template <class IntegerType, class = std::enable_if_t<std::is_integral<IntegerType>::value>>
constexpr byte& operator<<=(byte& b, IntegerType shift) noexcept
{ return b = byte(static_cast<unsigned char>(b) << shift); }
template <class IntegerType, class = std::enable_if_t<std::is_integral<IntegerType>::value>>
constexpr byte& operator<<=(byte& b, IntegerType shift) noexcept
{
return b = byte(static_cast<unsigned char>(b) << shift);
}
template <class IntegerType, class = std::enable_if_t<std::is_integral<IntegerType>::value>>
constexpr byte operator<<(byte b, IntegerType shift) noexcept
{ return byte(static_cast<unsigned char>(b) << shift); }
template <class IntegerType, class = std::enable_if_t<std::is_integral<IntegerType>::value>>
constexpr byte operator<<(byte b, IntegerType shift) noexcept
{
return byte(static_cast<unsigned char>(b) << shift);
}
template <class IntegerType, class = std::enable_if_t<std::is_integral<IntegerType>::value>>
constexpr byte& operator>>=(byte& b, IntegerType shift) noexcept
{ return b = byte(static_cast<unsigned char>(b) >> shift); }
template <class IntegerType, class = std::enable_if_t<std::is_integral<IntegerType>::value>>
constexpr byte& operator>>=(byte& b, IntegerType shift) noexcept
{
return b = byte(static_cast<unsigned char>(b) >> shift);
}
template <class IntegerType, class = std::enable_if_t<std::is_integral<IntegerType>::value>>
constexpr byte operator>> (byte b, IntegerType shift) noexcept
{ return byte(static_cast<unsigned char>(b) >> shift); }
template <class IntegerType, class = std::enable_if_t<std::is_integral<IntegerType>::value>>
constexpr byte operator>>(byte b, IntegerType shift) noexcept
{
return byte(static_cast<unsigned char>(b) >> shift);
}
constexpr byte& operator|=(byte& l, byte r) noexcept
{ return l = byte(static_cast<unsigned char>(l) | static_cast<unsigned char>(r)); }
constexpr byte& operator|=(byte& l, byte r) noexcept
{
return l = byte(static_cast<unsigned char>(l) | static_cast<unsigned char>(r));
}
constexpr byte operator|(byte l, byte r) noexcept
{ return byte(static_cast<unsigned char>(l) + static_cast<unsigned char>(r)); }
constexpr byte operator|(byte l, byte r) noexcept
{
return byte(static_cast<unsigned char>(l) + static_cast<unsigned char>(r));
}
constexpr byte& operator&=(byte& l, byte r) noexcept
{ return l = byte(static_cast<unsigned char>(l) & static_cast<unsigned char>(r)); }
constexpr byte& operator&=(byte& l, byte r) noexcept
{
return l = byte(static_cast<unsigned char>(l) & static_cast<unsigned char>(r));
}
constexpr byte operator&(byte l, byte r) noexcept
{ return byte(static_cast<unsigned char>(l) & static_cast<unsigned char>(r)); }
constexpr byte operator&(byte l, byte r) noexcept
{
return byte(static_cast<unsigned char>(l) & static_cast<unsigned char>(r));
}
constexpr byte& operator^=(byte& l, byte r) noexcept
{ return l = byte(static_cast<unsigned char>(l) ^ static_cast<unsigned char>(r)); }
constexpr byte& operator^=(byte& l, byte r) noexcept
{
return l = byte(static_cast<unsigned char>(l) ^ static_cast<unsigned char>(r));
}
constexpr byte operator^(byte l, byte r) noexcept
{ return byte(static_cast<unsigned char>(l) ^ static_cast<unsigned char>(r)); }
constexpr byte operator^(byte l, byte r) noexcept
{
return byte(static_cast<unsigned char>(l) ^ static_cast<unsigned char>(r));
}
constexpr byte operator~(byte b) noexcept
{ return byte(~static_cast<unsigned char>(b)); }
template <class IntegerType, class = std::enable_if_t<std::is_integral<IntegerType>::value>>
constexpr IntegerType to_integer(byte b) noexcept { return {b}; }
constexpr byte operator~(byte b) noexcept { return byte(~static_cast<unsigned char>(b)); }
template <class IntegerType, class = std::enable_if_t<std::is_integral<IntegerType>::value>>
constexpr IntegerType to_integer(byte b) noexcept
{
return {b};
}
} // namespace gsl
#ifdef _MSC_VER
#if _MSC_VER <= 1800

85
include/gsl_util.h
View File

@ -21,9 +21,9 @@
#include "gsl_assert.h" // Ensures/Expects
#include <array>
#include <utility>
#include <type_traits>
#include <exception>
#include <type_traits>
#include <utility>
#ifdef _MSC_VER
@ -32,7 +32,7 @@
#define constexpr
#pragma warning(push)
#pragma warning(disable: 4127) // conditional expression is constant
#pragma warning(disable : 4127) // conditional expression is constant
// MSVC 2013 workarounds
#if _MSC_VER <= 1800
@ -42,13 +42,12 @@
// turn off some misguided warnings
#pragma warning(push)
#pragma warning(disable: 4351) // warns about newly introduced aggregate initializer behavior
#pragma warning(disable : 4351) // warns about newly introduced aggregate initializer behavior
#endif // _MSC_VER <= 1800
#endif // _MSC_VER
namespace gsl
{
//
@ -60,18 +59,20 @@ template <class F>
class final_act
{
public:
explicit final_act(F f) noexcept
: f_(std::move(f)), invoke_(true)
{}
explicit final_act(F f) noexcept : f_(std::move(f)), invoke_(true) {}
final_act(final_act&& other) noexcept
: f_(std::move(other.f_)), invoke_(other.invoke_)
{ other.invoke_ = false; }
final_act(final_act&& other) noexcept : f_(std::move(other.f_)), invoke_(other.invoke_)
{
other.invoke_ = false;
}
final_act(const final_act&) = delete;
final_act& operator=(const final_act&) = delete;
~final_act() noexcept { if (invoke_) f_(); }
~final_act() noexcept
{
if (invoke_) f_();
}
private:
F f_;
@ -80,35 +81,44 @@ private:
// finally() - convenience function to generate a final_act
template <class F>
inline final_act<F> finally(const F &f)
noexcept { return final_act<F>(f); }
inline final_act<F> finally(const F& f) noexcept
{
return final_act<F>(f);
}
template <class F>
inline final_act<F> finally(F &&f) noexcept
{ return final_act<F>(std::forward<F>(f)); }
inline final_act<F> finally(F&& f) noexcept
{
return final_act<F>(std::forward<F>(f));
}
// narrow_cast(): a searchable way to do narrowing casts of values
template<class T, class U>
template <class T, class U>
inline constexpr T narrow_cast(U u) noexcept
{ return static_cast<T>(u); }
{
return static_cast<T>(u);
}
struct narrowing_error : public std::exception {};
struct narrowing_error : public std::exception
{
};
namespace details
{
template<class T, class U>
struct is_same_signedness : public std::integral_constant<bool, std::is_signed<T>::value == std::is_signed<U>::value>
{};
template <class T, class U>
struct is_same_signedness
: public std::integral_constant<bool, std::is_signed<T>::value == std::is_signed<U>::value>
{
};
}
// narrow() : a checked version of narrow_cast() that throws if the cast changed the value
template<class T, class U>
template <class T, class U>
inline T narrow(U u)
{
T t = narrow_cast<T>(u);
if (static_cast<U>(t) != u)
throw narrowing_error();
#pragma warning(suppress:4127) // suppress warning from MSVC compiler about constant in if-test
if (static_cast<U>(t) != u) throw narrowing_error();
#pragma warning(suppress : 4127) // suppress warning from MSVC compiler about constant in if-test
if (!details::is_same_signedness<T, U>::value && ((t < T{}) != (u < U{})))
throw narrowing_error();
return t;
@ -118,24 +128,35 @@ inline T narrow(U u)
// at() - Bounds-checked way of accessing static arrays, std::array, std::vector
//
template <class T, size_t N>
constexpr T& at(T(&arr)[N], size_t index)
{ Expects(index < N); return arr[index]; }
constexpr T& at(T (&arr)[N], size_t index)
{
Expects(index < N);
return arr[index];
}
template <class T, size_t N>
constexpr T& at(std::array<T, N>& arr, size_t index)
{ Expects(index < N); return arr[index]; }
{
Expects(index < N);
return arr[index];
}
template <class Cont>
constexpr typename Cont::value_type& at(Cont& cont, size_t index)
{ Expects(index < cont.size()); return cont[index]; }
{
Expects(index < cont.size());
return cont[index];
}
template <class T>
constexpr const T& at(std::initializer_list<T> cont, size_t index)
{ Expects(index < cont.size()); return *(cont.begin() + index); }
{
Expects(index < cont.size());
return *(cont.begin() + index);
}
} // namespace gsl
#ifdef _MSC_VER
#pragma warning(pop)

95
include/multi_span.h
View File

@ -20,8 +20,8 @@
#define GSL_MULTI_SPAN_H
#include "gsl_assert.h"
#include "gsl_util.h"
#include "gsl_byte.h"
#include "gsl_util.h"
#include <algorithm>
#include <array>
#include <cassert>
@ -217,10 +217,7 @@ public:
return ret;
}
friend constexpr index operator*(value_type v, const index& rhs) noexcept
{
return rhs * v;
}
friend constexpr index operator*(value_type v, const index& rhs) noexcept { return rhs * v; }
constexpr index& operator*=(value_type v) noexcept
{
@ -743,8 +740,7 @@ public:
}
constexpr strided_bounds(const index_type& extents, const index_type& strides) noexcept
: m_extents(extents),
m_strides(strides)
: m_extents(extents), m_strides(strides)
{
}
@ -841,8 +837,7 @@ public:
using index_size_type = typename IndexType::value_type;
template <typename Bounds>
explicit bounds_iterator(const Bounds& bnd, value_type curr) noexcept
: boundary_(bnd.index_bounds()),
curr_(std::move(curr))
: boundary_(bnd.index_bounds()), curr_(std::move(curr))
{
static_assert(is_bounds<Bounds>::value, "Bounds type must be provided");
}
@ -930,7 +925,7 @@ public:
return ret -= n;
}
constexpr bounds_iterator& operator-=(difference_type n) noexcept { return * this += -n; }
constexpr bounds_iterator& operator-=(difference_type n) noexcept { return *this += -n; }
constexpr difference_type operator-(const bounds_iterator& rhs) const noexcept
{
@ -1159,7 +1154,8 @@ namespace details
};
template <typename ValueType, std::ptrdiff_t FirstDimension, std::ptrdiff_t... RestDimensions>
struct is_multi_span_oracle<multi_span<ValueType, FirstDimension, RestDimensions...>> : std::true_type
struct is_multi_span_oracle<multi_span<ValueType, FirstDimension, RestDimensions...>>
: std::true_type
{
};
@ -1249,11 +1245,13 @@ public:
constexpr multi_span(value_type&&) = delete;
// construct from pointer + length
constexpr multi_span(pointer ptr, size_type size) noexcept : multi_span(ptr, bounds_type{size}) {}
constexpr multi_span(pointer ptr, size_type size) noexcept : multi_span(ptr, bounds_type{size})
{
}
// construct from pointer + length - multidimensional
constexpr multi_span(pointer data, bounds_type bounds) noexcept : data_(data),
bounds_(std::move(bounds))
constexpr multi_span(pointer data, bounds_type bounds) noexcept
: data_(data), bounds_(std::move(bounds))
{
Expects((bounds_.size() > 0 && data != nullptr) || bounds_.size() == 0);
}
@ -1263,7 +1261,8 @@ public:
typename = std::enable_if_t<std::is_convertible<Ptr, pointer>::value &&
details::LessThan<bounds_type::dynamic_rank, 2>::value>>
constexpr multi_span(pointer begin, Ptr end)
: multi_span(begin, details::newBoundsHelper<bounds_type>(static_cast<pointer>(end) - begin))
: multi_span(begin,
details::newBoundsHelper<bounds_type>(static_cast<pointer>(end) - begin))
{
Expects(begin != nullptr && end != nullptr && begin <= static_cast<pointer>(end));
}
@ -1273,8 +1272,7 @@ public:
constexpr multi_span(T (&arr)[N])
: multi_span(reinterpret_cast<pointer>(arr), bounds_type{typename Helper::bounds_type{}})
{
static_assert(
std::is_convertible<typename Helper::value_type(*) [], value_type(*) []>::value,
static_assert(std::is_convertible<typename Helper::value_type(*)[], value_type(*)[]>::value,
"Cannot convert from source type to target multi_span type.");
static_assert(std::is_convertible<typename Helper::bounds_type, bounds_type>::value,
"Cannot construct a multi_span from an array with fewer elements.");
@ -1286,17 +1284,17 @@ public:
constexpr multi_span(T* const& data, size_type size)
: multi_span(reinterpret_cast<pointer>(data), typename Helper::bounds_type{size})
{
static_assert(
std::is_convertible<typename Helper::value_type(*) [], value_type(*) []>::value,
static_assert(std::is_convertible<typename Helper::value_type(*)[], value_type(*)[]>::value,
"Cannot convert from source type to target multi_span type.");
}
// construct from std::array
template <typename T, size_t N>
constexpr multi_span(std::array<T, N>& arr) : multi_span(arr.data(), bounds_type{static_bounds<N>{}})
constexpr multi_span(std::array<T, N>& arr)
: multi_span(arr.data(), bounds_type{static_bounds<N>{}})
{
static_assert(
std::is_convertible<T(*) [], typename std::remove_const_t<value_type>(*) []>::value,
std::is_convertible<T(*)[], typename std::remove_const_t<value_type>(*)[]>::value,
"Cannot convert from source type to target multi_span type.");
static_assert(std::is_convertible<static_bounds<N>, bounds_type>::value,
"You cannot construct a multi_span from a std::array of smaller size.");
@ -1307,7 +1305,7 @@ public:
constexpr multi_span(const std::array<std::remove_const_t<value_type>, N>& arr)
: multi_span(arr.data(), static_bounds<N>())
{
static_assert(std::is_convertible<T(*) [], std::remove_const_t<value_type>>::value,
static_assert(std::is_convertible<T(*)[], std::remove_const_t<value_type>>::value,
"Cannot convert from source type to target multi_span type.");
static_assert(std::is_convertible<static_bounds<N>, bounds_type>::value,
"You cannot construct a multi_span from a std::array of smaller size.");
@ -1348,8 +1346,8 @@ public:
typename OtherBounds = static_bounds<OtherDimensions...>,
typename = std::enable_if_t<std::is_convertible<OtherValueType, ValueType>::value &&
std::is_convertible<OtherBounds, bounds_type>::value>>
constexpr multi_span(multi_span<OtherValueType, OtherDimensions...> other) noexcept : data_(other.data_),
bounds_(other.bounds_)
constexpr multi_span(multi_span<OtherValueType, OtherDimensions...> other) noexcept
: data_(other.data_), bounds_(other.bounds_)
{
}
@ -1424,7 +1422,8 @@ public:
// subspan() - create a subview of count elements starting at offset
// supplying dynamic_range for count will consume all available elements from offset
constexpr multi_span<ValueType, dynamic_range> subspan(size_type offset,
size_type count = dynamic_range) const noexcept
size_type count = dynamic_range) const
noexcept
{
Expects((offset >= 0 && offset <= this->size()) &&
(count == dynamic_range || (count <= this->size() - offset)));
@ -1535,7 +1534,8 @@ public:
template <typename OtherValueType, std::ptrdiff_t... OtherDimensions,
typename Dummy = 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 bounds_.size() == other.bounds_.size() &&
(data_ == other.data_ || std::equal(this->begin(), this->end(), other.begin()));
@ -1544,7 +1544,8 @@ public:
template <typename OtherValueType, std::ptrdiff_t... OtherDimensions,
typename Dummy = 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 !(*this == other);
}
@ -1552,7 +1553,8 @@ public:
template <typename OtherValueType, std::ptrdiff_t... OtherDimensions,
typename Dummy = 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 std::lexicographical_compare(this->begin(), this->end(), other.begin(), other.end());
}
@ -1560,7 +1562,8 @@ public:
template <typename OtherValueType, std::ptrdiff_t... OtherDimensions,
typename Dummy = 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);
}
@ -1568,7 +1571,8 @@ public:
template <typename OtherValueType, std::ptrdiff_t... OtherDimensions,
typename Dummy = 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);
}
@ -1576,7 +1580,8 @@ public:
template <typename OtherValueType, std::ptrdiff_t... OtherDimensions,
typename Dummy = 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 !(*this < other);
}
@ -1590,8 +1595,8 @@ public:
// DimCount and Enabled here are workarounds for a bug in MSVC 2015
template <typename SpanType, typename... Dimensions2, size_t DimCount = sizeof...(Dimensions2),
bool Enabled = (DimCount > 0), typename = std::enable_if_t<Enabled>>
constexpr multi_span<typename SpanType::value_type, Dimensions2::value...> as_span(SpanType s,
Dimensions2... dims)
constexpr multi_span<typename SpanType::value_type, Dimensions2::value...>
as_span(SpanType s, Dimensions2... dims)
{
static_assert(details::is_multi_span<SpanType>::value,
"Variadic as_span() is for reshaping existing spans.");
@ -1628,8 +1633,8 @@ multi_span<byte> as_writeable_bytes(multi_span<U, Dimensions...> s) noexcept
// on all implementations. It should be considered an experimental extension
// to the standard GSL interface.
template <typename U, std::ptrdiff_t... Dimensions>
constexpr auto as_span(multi_span<const byte, Dimensions...> s) noexcept
-> multi_span<const U, static_cast<std::ptrdiff_t>(
constexpr auto as_span(multi_span<const byte, Dimensions...> s) noexcept -> multi_span<
const U, static_cast<std::ptrdiff_t>(
multi_span<const byte, Dimensions...>::bounds_type::static_size != dynamic_range
? (static_cast<size_t>(
multi_span<const byte, Dimensions...>::bounds_type::static_size) /
@ -1653,10 +1658,11 @@ constexpr auto as_span(multi_span<const byte, Dimensions...> s) noexcept
// on all implementations. It should be considered an experimental extension
// to the standard GSL interface.
template <typename U, std::ptrdiff_t... Dimensions>
constexpr auto as_span(multi_span<byte, Dimensions...> s) noexcept -> multi_span<
U, narrow_cast<std::ptrdiff_t>(
constexpr auto as_span(multi_span<byte, Dimensions...> s) noexcept
-> multi_span<U, narrow_cast<std::ptrdiff_t>(
multi_span<byte, Dimensions...>::bounds_type::static_size != dynamic_range
? static_cast<std::size_t>(multi_span<byte, Dimensions...>::bounds_type::static_size) /
? static_cast<std::size_t>(
multi_span<byte, Dimensions...>::bounds_type::static_size) /
sizeof(U)
: dynamic_range)>
{
@ -1816,8 +1822,8 @@ public:
auto d = narrow_cast<size_type>(sizeof(OtherValueType) / sizeof(value_type));
size_type size = this->bounds().total_size() / d;
return {const_cast<OtherValueType*>(reinterpret_cast<const OtherValueType*>(this->data())), size,
bounds_type{resize_extent(this->bounds().index_bounds(), d),
return {const_cast<OtherValueType*>(reinterpret_cast<const OtherValueType*>(this->data())),
size, bounds_type{resize_extent(this->bounds().index_bounds(), d),
resize_stride(this->bounds().strides(), d)}};
}
@ -2049,7 +2055,7 @@ public:
contiguous_span_iterator ret{*this};
return ret -= n;
}
contiguous_span_iterator& operator-=(difference_type n) noexcept { return * this += -n; }
contiguous_span_iterator& operator-=(difference_type n) noexcept { return *this += -n; }
difference_type operator-(const contiguous_span_iterator& rhs) const noexcept
{
Expects(m_validator == rhs.m_validator);
@ -2148,16 +2154,13 @@ public:
general_span_iterator ret{*this};
return ret -= n;
}
general_span_iterator& operator-=(difference_type n) noexcept { return * this += -n; }
general_span_iterator& operator-=(difference_type n) noexcept { return *this += -n; }
difference_type operator-(const general_span_iterator& rhs) const noexcept
{
Expects(m_container == rhs.m_container);
return m_itr - rhs.m_itr;
}
value_type operator[](difference_type n) const noexcept
{
return (*m_container)[m_itr[n]];
}
value_type operator[](difference_type n) const noexcept { return (*m_container)[m_itr[n]]; }
bool operator==(const general_span_iterator& rhs) const noexcept
{

462
include/span.h
View File

@ -20,11 +20,11 @@
#define GSL_SPAN_H
#include "gsl_assert.h"
#include "gsl_util.h"
#include "gsl_byte.h"
#include "gsl_util.h"
#include <array>
#include <limits>
#include <iterator>
#include <limits>
#include <stdexcept>
#include <type_traits>
#include <utility>
@ -39,7 +39,7 @@
// blanket turn off warnings from CppCoreCheck for now
// so people aren't annoyed by them when running the tool.
// more targeted suppressions will be added in a future update to the GSL
#pragma warning(disable: 26481 26482 26483 26485 26490 26491 26492 26493 26495)
#pragma warning(disable : 26481 26482 26483 26485 26490 26491 26492 26493 26495)
// No MSVC does constexpr fully yet
#pragma push_macro("constexpr")
@ -82,87 +82,71 @@ namespace gsl
template <class ElementType, std::ptrdiff_t Extent = dynamic_extent>
class span;
// [views.constants], constants
constexpr const std::ptrdiff_t dynamic_extent = -1;
// implementation details
namespace details
{
template <class T>
struct is_span_oracle : std::false_type
{
};
template <class T>
struct is_span_oracle : std::false_type
{
};
template <class ElementType, std::ptrdiff_t Extent>
struct is_span_oracle<gsl::span<ElementType, Extent>> : std::true_type
{
};
template <class ElementType, std::ptrdiff_t Extent>
struct is_span_oracle<gsl::span<ElementType, Extent>> : std::true_type
{
};
template <class T>
struct is_span : is_span_oracle<std::remove_cv_t<T>>
{
};
template <class T>
struct is_span : is_span_oracle<std::remove_cv_t<T>>
{
};
template <class From, class To>
struct is_allowed_pointer_conversion
: std::bool_constant<
std::is_pointer<From>::value &&
std::is_pointer<To>::value &&
std::is_convertible<From, To>::value
>
{
};
template <class From, class To>
struct is_allowed_pointer_conversion
: std::bool_constant<std::is_pointer<From>::value && std::is_pointer<To>::value &&
std::is_convertible<From, To>::value>
{
};
template <class From, class To>
struct is_allowed_integral_conversion
: std::bool_constant<
std::is_integral<From>::value &&
std::is_integral<To>::value &&
sizeof(From) == sizeof(To) &&
alignof(From) == alignof(To) &&
std::is_convertible<From, To>::value
>
{
};
template <class From, class To>
struct is_allowed_integral_conversion
: std::bool_constant<std::is_integral<From>::value && std::is_integral<To>::value &&
sizeof(From) == sizeof(To) && alignof(From) == alignof(To) &&
std::is_convertible<From, To>::value>
{
};
template <std::ptrdiff_t From, std::ptrdiff_t To>
struct is_allowed_extent_conversion
: std::bool_constant<
From == To ||
From == gsl::dynamic_extent ||
To == gsl::dynamic_extent
>
{
};
template <std::ptrdiff_t From, std::ptrdiff_t To>
struct is_allowed_extent_conversion
: std::bool_constant<From == To || From == gsl::dynamic_extent || To == gsl::dynamic_extent>
{
};
template <class From, class To>
struct is_allowed_element_type_conversion
: std::bool_constant<
std::is_same<From, std::remove_cv_t<To>>::value ||
template <class From, class To>
struct is_allowed_element_type_conversion
: std::bool_constant<std::is_same<From, std::remove_cv_t<To>>::value ||
is_allowed_pointer_conversion<From, To>::value ||
is_allowed_integral_conversion<From, To>::value
>
{
};
is_allowed_integral_conversion<From, To>::value>
{
};
template <class From>
struct is_allowed_element_type_conversion<From, byte>
template <class From>
struct is_allowed_element_type_conversion<From, byte>
: std::bool_constant<!std::is_const<From>::value>
{
};
{
};
template <class From>
struct is_allowed_element_type_conversion<From, const byte>
: std::true_type
{
};
template <class From>
struct is_allowed_element_type_conversion<From, const byte> : std::true_type
{
};
template <class Span>
class const_span_iterator
{
public:
template <class Span>
class const_span_iterator
{
public:
using iterator_category = std::random_access_iterator_tag;
using value_type = typename Span::element_type;
using difference_type = std::ptrdiff_t;
@ -174,13 +158,22 @@ public:
using reference = const_reference;
constexpr const_span_iterator() : const_span_iterator(nullptr, 0) {}
constexpr const_span_iterator(const Span* span, typename Span::index_type index) : span_(span), index_(index)
constexpr const_span_iterator(const Span* span, typename Span::index_type index)
: span_(span), index_(index)
{
Expects(span == nullptr || (index_ >= 0 && index <= span_->length()));
}
constexpr reference operator*() const { Expects(span_); return (*span_)[index_]; }
constexpr pointer operator->() const { Expects(span_); return &((*span_)[index_]); }
constexpr reference operator*() const
{
Expects(span_);
return (*span_)[index_];
}
constexpr pointer operator->() const
{
Expects(span_);
return &((*span_)[index_]);
}
constexpr const_span_iterator& operator++() noexcept
{
@ -240,17 +233,17 @@ public:
return index_ - rhs.index_;
}
constexpr reference operator[](difference_type n) const noexcept
{
return *(*this + n);
}
constexpr reference operator[](difference_type n) const noexcept { return *(*this + n); }
constexpr bool operator==(const const_span_iterator& rhs) const noexcept
{
return span_ == rhs.span_ && index_ == rhs.index_;
}
constexpr bool operator!=(const const_span_iterator& rhs) const noexcept { return !(*this == rhs); }
constexpr bool operator!=(const const_span_iterator& rhs) const noexcept
{
return !(*this == rhs);
}
constexpr bool operator<(const const_span_iterator& rhs) const noexcept
{
@ -258,11 +251,20 @@ public:
return index_ < rhs.index_;
}
constexpr bool operator<=(const const_span_iterator& rhs) const noexcept { return !(rhs < *this); }
constexpr bool operator<=(const const_span_iterator& rhs) const noexcept
{
return !(rhs < *this);
}
constexpr bool operator>(const const_span_iterator& rhs) const noexcept { return rhs < *this; }
constexpr bool operator>(const const_span_iterator& rhs) const noexcept
{
return rhs < *this;
}
constexpr bool operator>=(const const_span_iterator& rhs) const noexcept { return !(rhs > *this); }
constexpr bool operator>=(const const_span_iterator& rhs) const noexcept
{
return !(rhs > *this);
}
void swap(const_span_iterator& rhs) noexcept
{
@ -270,18 +272,17 @@ public:
std::swap(m_span, rhs.m_span);
}
private:
private:
const Span* span_;
ptrdiff_t index_;
};
};
template <class Span>
class span_iterator : public const_span_iterator<Span>
{
template <class Span>
class span_iterator : public const_span_iterator<Span>
{
using base_type = const_span_iterator<Span>;
public:
public:
using iterator_category = std::random_access_iterator_tag;
using value_type = typename Span::element_type;
using difference_type = std::ptrdiff_t;
@ -290,80 +291,129 @@ public:
using reference = value_type&;
constexpr span_iterator() : base_type() {}
constexpr span_iterator(const Span* span, typename Span::index_type index) : base_type(span, index) {}
constexpr span_iterator(const Span* span, typename Span::index_type index)
: base_type(span, index)
{
}
constexpr reference operator*() const { return const_cast<reference>(base_type::operator*()); }
constexpr pointer operator->() const { return const_cast<pointer>(base_type::operator->()); }
constexpr reference operator*() const
{
return const_cast<reference>(base_type::operator*());
}
constexpr pointer operator->() const
{
return const_cast<pointer>(base_type::operator->());
}
constexpr span_iterator& operator++() noexcept { base_type::operator++(); return *this; }
constexpr span_iterator& operator++() noexcept
{
base_type::operator++();
return *this;
}
constexpr span_iterator operator++(int) noexcept { return base_type::operator++(1); }
constexpr span_iterator& operator--() noexcept { base_type::operator--(); return *this; }
constexpr span_iterator& operator--() noexcept
{
base_type::operator--();
return *this;
}
constexpr span_iterator operator--(int) noexcept { return base_type::operator--(1); }
constexpr span_iterator operator+(difference_type n) const noexcept { return base_type::operator+(n); }
constexpr span_iterator operator+(difference_type n) const noexcept
{
return base_type::operator+(n);
}
constexpr span_iterator& operator+=(difference_type n) noexcept { return base_type::operator+=(n); }
constexpr span_iterator& operator+=(difference_type n) noexcept
{
return base_type::operator+=(n);
}
constexpr span_iterator operator-(difference_type n) const noexcept { return base_type::operator-(n); }
constexpr span_iterator operator-(difference_type n) const noexcept
{
return base_type::operator-(n);
}
constexpr span_iterator& operator-=(difference_type n) noexcept { return base_type::operator-=(n); }
constexpr span_iterator& operator-=(difference_type n) noexcept
{
return base_type::operator-=(n);
}
constexpr difference_type operator-(const span_iterator& rhs) const noexcept { return base_type::operator-(rhs); }
constexpr difference_type operator-(const span_iterator& rhs) const noexcept
{
return base_type::operator-(rhs);
}
constexpr reference operator[](difference_type n) const noexcept { return *(*this + n); }
constexpr bool operator==(const span_iterator& rhs) const noexcept { return base_type::operator==(rhs); }
constexpr bool operator==(const span_iterator& rhs) const noexcept
{
return base_type::operator==(rhs);
}
constexpr bool operator!=(const span_iterator& rhs) const noexcept { return !(*this == rhs); }
constexpr bool operator!=(const span_iterator& rhs) const noexcept
{
return !(*this == rhs);
}
constexpr bool operator<(const span_iterator& rhs) const noexcept { return base_type::operator<(rhs); }
constexpr bool operator<(const span_iterator& rhs) const noexcept
{
return base_type::operator<(rhs);
}
constexpr bool operator<=(const span_iterator& rhs) const noexcept { return !(rhs < *this); }
constexpr bool operator<=(const span_iterator& rhs) const noexcept
{
return !(rhs < *this);
}
constexpr bool operator>(const span_iterator& rhs) const noexcept { return rhs < *this; }
constexpr bool operator>=(const span_iterator& rhs) const noexcept { return !(rhs > *this); }
constexpr bool operator>=(const span_iterator& rhs) const noexcept
{
return !(rhs > *this);
}
void swap(span_iterator& rhs) noexcept { base_type::swap(rhs); }
};
};
template <typename Span>
constexpr const_span_iterator<Span> operator+(typename const_span_iterator<Span>::difference_type n,
template <typename Span>
constexpr const_span_iterator<Span>
operator+(typename const_span_iterator<Span>::difference_type n,
const const_span_iterator<Span>& rhs) noexcept
{
{
return rhs + n;
}
}
template <typename Span>
constexpr const_span_iterator<Span> operator-(typename const_span_iterator<Span>::difference_type n,
template <typename Span>
constexpr const_span_iterator<Span>
operator-(typename const_span_iterator<Span>::difference_type n,
const const_span_iterator<Span>& rhs) noexcept
{
{
return rhs - n;
}
}
template <typename Span>
constexpr span_iterator<Span> operator+(typename span_iterator<Span>::difference_type n,
template <typename Span>
constexpr span_iterator<Span> operator+(typename span_iterator<Span>::difference_type n,
const span_iterator<Span>& rhs) noexcept
{
{
return rhs + n;
}
}
template <typename Span>
constexpr span_iterator<Span> operator-(typename span_iterator<Span>::difference_type n,
template <typename Span>
constexpr span_iterator<Span> operator-(typename span_iterator<Span>::difference_type n,
const span_iterator<Span>& rhs) noexcept
{
{
return rhs - n;
}
}
} // namespace details
// [span], class template span
template <class ElementType, std::ptrdiff_t Extent>
class span {
class span
{
public:
// constants and types
using element_type = ElementType;
@ -379,78 +429,83 @@ public:
constexpr static const index_type extent = Extent;
// [span.cons], span constructors, copy, assignment, and destructor
constexpr span() noexcept : storage_(nullptr, extent_type<0>())
{}
constexpr span() noexcept : storage_(nullptr, extent_type<0>()) {}
constexpr span(nullptr_t) noexcept : span()
{}
constexpr span(nullptr_t) noexcept : span() {}
constexpr span(pointer ptr, index_type count) : storage_(ptr, count)
{}
constexpr span(pointer ptr, index_type count) : storage_(ptr, count) {}
constexpr span(pointer firstElem, pointer lastElem)
: storage_(firstElem, std::distance(firstElem, lastElem))
{}
{
}
template <size_t N>
constexpr span(element_type(&arr)[N]) noexcept
: storage_(&arr[0], extent_type<N>())
{}
constexpr span(element_type (&arr)[N]) noexcept : storage_(&arr[0], extent_type<N>())
{
}
template <size_t N>
constexpr span(std::array<element_type, N>& arr) noexcept
: storage_(&arr[0], extent_type<N>())
{}
constexpr span(std::array<element_type, N>& arr) noexcept : storage_(&arr[0], extent_type<N>())
{
}
template <size_t N, class = std::enable_if_t<is_const<element_type>::value>>
constexpr span(std::array<std::remove_const_t<element_type>, N>& arr) noexcept
: storage_(&arr[0], extent_type<N>())
{}
{
}
template <size_t N, class = std::enable_if_t<is_const<element_type>::value>>
constexpr span(const std::array<std::remove_const_t<element_type>, N>& arr) noexcept
: storage_(&arr[0], extent_type<N>())
{}
{
}
// NB: the SFINAE here uses .data() as a incomplete/imperfect proxy for the requirement
// on Container to be a contiguous sequence container.
template <class Container,
class = std::enable_if_t<!details::is_span<Container>::value &&
std::is_convertible<Container::pointer, pointer>::value &&
std::is_convertible<Container::pointer, decltype(std::declval<Container>().data())>::value>
>
constexpr span(Container& cont) : span(cont.data(), cont.size()) {}
template <class Container,
class = std::enable_if_t<std::is_const<element_type>::value &&
class = std::enable_if_t<
!details::is_span<Container>::value &&
std::is_convertible<Container::pointer, pointer>::value &&
std::is_convertible<Container::pointer, decltype(std::declval<Container>().data())>::value>
>
constexpr span(const Container& cont) : span(cont.data(), cont.size()) {}
std::is_convertible<Container::pointer,
decltype(std::declval<Container>().data())>::value>>
constexpr span(Container& cont) : span(cont.data(), cont.size())
{
}
template <class Container,
class = std::enable_if_t<
std::is_const<element_type>::value && !details::is_span<Container>::value &&
std::is_convertible<Container::pointer, pointer>::value &&
std::is_convertible<Container::pointer,
decltype(std::declval<Container>().data())>::value>>
constexpr span(const Container& cont) : span(cont.data(), cont.size())
{
}
constexpr span(const span& other) noexcept = default;
constexpr span(span&& other) noexcept = default;
template <class OtherElementType, std::ptrdiff_t OtherExtent,
template <
class OtherElementType, std::ptrdiff_t OtherExtent,
class = std::enable_if_t<
details::is_allowed_extent_conversion<OtherExtent, Extent>::value &&
details::is_allowed_element_type_conversion<OtherElementType, element_type>::value
>
>
details::is_allowed_element_type_conversion<OtherElementType, element_type>::value>>
constexpr span(const span<OtherElementType, OtherExtent>& other)
: storage_(reinterpret_cast<pointer>(other.data()), extent_type<OtherExtent>(other.size()))
{}
{
}
template <class OtherElementType, std::ptrdiff_t OtherExtent,
template <
class OtherElementType, std::ptrdiff_t OtherExtent,
class = std::enable_if_t<
details::is_allowed_extent_conversion<OtherExtent, Extent>::value &&
details::is_allowed_element_type_conversion<OtherElementType, element_type>::value
>
>
details::is_allowed_element_type_conversion<OtherElementType, element_type>::value>>
constexpr span(span<OtherElementType, OtherExtent>&& other)
: storage_(reinterpret_cast<pointer>(other.data()), extent_type<OtherExtent>(other.size()))
{}
{
}
~span() noexcept = default;
constexpr span& operator=(const span& other) noexcept = default;
@ -461,14 +516,14 @@ public:
constexpr span<element_type, Count> first() const
{
Expects(Count >= 0 && Count <= size());
return { data(), Count };
return {data(), Count};
}
template <ptrdiff_t Count>
constexpr span<element_type, Count> last() const
{
Expects(Count >= 0 && Count <= size());
return{ data() + (size() - Count), Count };
return {data() + (size() - Count), Count};
}
template <ptrdiff_t Offset, ptrdiff_t Count = dynamic_extent>
@ -476,19 +531,19 @@ public:
{
Expects((Offset == 0 || Offset > 0 && Offset <= size()) &&
(Count == dynamic_extent || Count >= 0 && Offset + Count <= size()));
return { data() + Offset, Count == dynamic_extent ? size() - Offset : Count };
return {data() + Offset, Count == dynamic_extent ? size() - Offset : Count};
}
constexpr span<element_type, dynamic_extent> first(index_type count) const
{
Expects(count >= 0 && count <= size());
return { data(), count };
return {data(), count};
}
constexpr span<element_type, dynamic_extent> last(index_type count) const
{
Expects(count >= 0 && count <= size());
return { data() + (size() - count), count };
return {data() + (size() - count), count};
}
constexpr span<element_type, dynamic_extent> subspan(index_type offset,
@ -496,7 +551,7 @@ public:
{
Expects((offset == 0 || offset > 0 && offset <= size()) &&
(count == dynamic_extent || count >= 0 && offset + count <= size()));
return { data() + offset, count == dynamic_extent ? size() - offset : count };
return {data() + offset, count == dynamic_extent ? size() - offset : count};
}
// [span.obs], span observers
@ -548,8 +603,7 @@ private:
Expects(ext.size() == Extent);
}
constexpr extent_type(index_type size)
{ Expects(size == Extent); }
constexpr extent_type(index_type size) { Expects(size == Extent); }
constexpr inline index_type size() const noexcept { return Extent; }
};
@ -560,13 +614,12 @@ private:
public:
template <index_type Other>
explicit constexpr extent_type(extent_type<Other> ext) : size_(ext.size())
{}
{
}
explicit constexpr extent_type(index_type size) : size_(size)
{ Expects(size >= 0); }
explicit constexpr extent_type(index_type size) : size_(size) { Expects(size >= 0); }
constexpr inline index_type size() const noexcept
{ return size_; }
constexpr inline index_type size() const noexcept { return size_; }
private:
index_type size_;
@ -580,12 +633,12 @@ private:
{
public:
template <class OtherExtentType>
constexpr storage_type(pointer data, OtherExtentType ext)
: ExtentType(ext), data_(data)
{ Expects((!data && size() == 0) || (data && size() >= 0)); }
constexpr storage_type(pointer data, OtherExtentType ext) : ExtentType(ext), data_(data)
{
Expects((!data && size() == 0) || (data && size() >= 0));
}
constexpr inline pointer data() const noexcept
{ return data_; }
constexpr inline pointer data() const noexcept { return data_; }
private:
pointer data_;
@ -594,60 +647,81 @@ private:
storage_type<extent_type<Extent>> storage_;
};
// [span.comparison], span comparison operators
template <class ElementType, ptrdiff_t Extent>
constexpr bool operator==(const span<ElementType, Extent>& l, const span<ElementType, Extent>& r)
{ return std::equal(l.begin(), l.end(), r.begin(), r.end()); }
{
return std::equal(l.begin(), l.end(), r.begin(), r.end());
}
template <class ElementType, ptrdiff_t Extent>
constexpr bool operator!=(const span<ElementType, Extent>& l, const span<ElementType, Extent>& r)
{ return !(l == r); }
{
return !(l == r);
}
template <class ElementType, ptrdiff_t Extent>
constexpr bool operator<(const span<ElementType, Extent>& l, const span<ElementType, Extent>& r)
{ return std::lexicographical_compare(l.begin(), l.end(), r.begin(), r.end()); }
{
return std::lexicographical_compare(l.begin(), l.end(), r.begin(), r.end());
}
template <class ElementType, ptrdiff_t Extent>
constexpr bool operator<=(const span<ElementType, Extent>& l, const span<ElementType, Extent>& r)
{ return !(l > r); }
{
return !(l > r);
}
template <class ElementType, ptrdiff_t Extent>
constexpr bool operator>(const span<ElementType, Extent>& l, const span<ElementType, Extent>& r)
{ return r < l; }
{
return r < l;
}
template <class ElementType, ptrdiff_t Extent>
constexpr bool operator>=(const span<ElementType, Extent>& l, const span<ElementType, Extent>& r)
{ return !(l < r); }
{
return !(l < r);
}
namespace details
{
// if we only supported compilers with good constexpr support then
// this pair of classes could collapse down to a constexpr function
// we should use a narrow_cast<> to go to size_t, but older compilers may not see it as constexpr
// we should use a narrow_cast<> to go to size_t, but older compilers may not see it as
// constexpr
// and so will fail compilation of the template
template <class ElementType, ptrdiff_t Extent>
struct calculate_byte_size :
std::integral_constant<std::ptrdiff_t, static_cast<ptrdiff_t>(sizeof(ElementType) * static_cast<size_t>(Extent))>
{};
struct calculate_byte_size
: std::integral_constant<std::ptrdiff_t,
static_cast<ptrdiff_t>(sizeof(ElementType) *
static_cast<size_t>(Extent))>
{
};
template <class ElementType>
struct calculate_byte_size<ElementType, dynamic_extent> :
std::integral_constant<std::ptrdiff_t, dynamic_extent>
{};
struct calculate_byte_size<ElementType, dynamic_extent>
: std::integral_constant<std::ptrdiff_t, dynamic_extent>
{
};
}
// [span.objectrep], views of object representation
template <class ElementType, ptrdiff_t Extent>
span<const byte, details::calculate_byte_size<ElementType, Extent>::value> as_bytes(span<ElementType, Extent> s) noexcept
{ return {reinterpret_cast<const byte*>(s.data()), s.size_bytes()}; }
span<const byte, details::calculate_byte_size<ElementType, Extent>::value>
as_bytes(span<ElementType, Extent> s) noexcept
{
return {reinterpret_cast<const byte*>(s.data()), s.size_bytes()};
}
template <class ElementType, ptrdiff_t Extent, class = std::enable_if_t<!std::is_const<ElementType>::value>>
span<byte, details::calculate_byte_size<ElementType, Extent>::value> as_writeable_bytes(span<ElementType, Extent> s) noexcept
{ return {reinterpret_cast<byte*>(s.data()), s.size_bytes()}; }
template <class ElementType, ptrdiff_t Extent,
class = std::enable_if_t<!std::is_const<ElementType>::value>>
span<byte, details::calculate_byte_size<ElementType, Extent>::value>
as_writeable_bytes(span<ElementType, Extent> s) noexcept
{
return {reinterpret_cast<byte*>(s.data()), s.size_bytes()};
}
} // namespace gsl

510
include/string_span.h
View File

@ -36,8 +36,7 @@
// blanket turn off warnings from CppCoreCheck for now
// so people aren't annoyed by them when running the tool.
// more targeted suppressions will be added in a future update to the GSL
#pragma warning(disable: 26481 26482 26483 26485 26490 26491 26492 26493 26495)
#pragma warning(disable : 26481 26482 26483 26485 26490 26491 26492 26493 26495)
// VS 2013 workarounds
#if _MSC_VER <= 1800
@ -80,19 +79,19 @@ namespace gsl
// (sometimes needlessly) break existing programs when introduced.
//
template<typename CharT, std::ptrdiff_t Extent = dynamic_extent>
template <typename CharT, std::ptrdiff_t Extent = dynamic_extent>
using basic_zstring = CharT*;
template<std::ptrdiff_t Extent = dynamic_extent>
template <std::ptrdiff_t Extent = dynamic_extent>
using czstring = basic_zstring<const char, Extent>;
template<std::ptrdiff_t Extent = dynamic_extent>
template <std::ptrdiff_t Extent = dynamic_extent>
using cwzstring = basic_zstring<const wchar_t, Extent>;
template<std::ptrdiff_t Extent = dynamic_extent>
template <std::ptrdiff_t Extent = dynamic_extent>
using zstring = basic_zstring<char, Extent>;
template<std::ptrdiff_t Extent = dynamic_extent>
template <std::ptrdiff_t Extent = dynamic_extent>
using wzstring = basic_zstring<wchar_t, Extent>;
//
@ -103,85 +102,93 @@ using wzstring = basic_zstring<wchar_t, Extent>;
//
// Will fail-fast if sentinel cannot be found before max elements are examined.
//
template<typename T, const T Sentinel>
template <typename T, const T Sentinel>
span<T, dynamic_extent> ensure_sentinel(T* seq, std::ptrdiff_t max = PTRDIFF_MAX)
{
auto cur = seq;
while ((cur - seq) < max && *cur != Sentinel) ++cur;
Ensures(*cur == Sentinel);
return{ seq, cur - seq };
return {seq, cur - seq};
}
//
// ensure_z - creates a span for a czstring or cwzstring.
// Will fail fast if a null-terminator cannot be found before
// the limit of size_type.
//
template<typename T>
inline span<T, dynamic_extent> ensure_z(T* const & sz, std::ptrdiff_t max = PTRDIFF_MAX)
template <typename T>
inline span<T, dynamic_extent> ensure_z(T* const& sz, std::ptrdiff_t max = PTRDIFF_MAX)
{
return ensure_sentinel<T, 0>(sz, max);
}
// TODO (neilmac) there is probably a better template-magic way to get the const and non-const overloads to share an implementation
// TODO (neilmac) there is probably a better template-magic way to get the const and non-const
// overloads to share an implementation
inline span<char, dynamic_extent> ensure_z(char* const& sz, std::ptrdiff_t max)
{
auto len = strnlen(sz, narrow_cast<size_t>(max));
Ensures(sz[len] == 0);
return{ sz, static_cast<std::ptrdiff_t>(len) };
return {sz, static_cast<std::ptrdiff_t>(len)};
}
inline span<const char, dynamic_extent> ensure_z(const char* const& sz, std::ptrdiff_t max)
{
auto len = strnlen(sz, narrow_cast<size_t>(max));
Ensures(sz[len] == 0);
return{ sz, static_cast<std::ptrdiff_t>(len) };
return {sz, static_cast<std::ptrdiff_t>(len)};
}
inline span<wchar_t, dynamic_extent> ensure_z(wchar_t* const& sz, std::ptrdiff_t max)
{
auto len = wcsnlen(sz, narrow_cast<size_t>(max));
Ensures(sz[len] == 0);
return{ sz, static_cast<std::ptrdiff_t>(len) };
return {sz, static_cast<std::ptrdiff_t>(len)};
}
inline span<const wchar_t, dynamic_extent> ensure_z(const wchar_t* const& sz, std::ptrdiff_t max)
{
auto len = wcsnlen(sz, narrow_cast<size_t>(max));
Ensures(sz[len] == 0);
return{ sz, static_cast<std::ptrdiff_t>(len) };
return {sz, static_cast<std::ptrdiff_t>(len)};
}
template<typename T, size_t N>
span<T, dynamic_extent> ensure_z(T(&sz)[N]) { return ensure_z(&sz[0], static_cast<std::ptrdiff_t>(N)); }
template <typename T, size_t N>
span<T, dynamic_extent> ensure_z(T (&sz)[N])
{
return ensure_z(&sz[0], static_cast<std::ptrdiff_t>(N));
}
template<class Cont>
span<typename std::remove_pointer<typename Cont::pointer>::type, dynamic_extent> ensure_z(Cont& cont)
template <class Cont>
span<typename std::remove_pointer<typename Cont::pointer>::type, dynamic_extent>
ensure_z(Cont& cont)
{
return ensure_z(cont.data(), static_cast<std::ptrdiff_t>(cont.length()));
}
template<typename CharT, std::ptrdiff_t>
template <typename CharT, std::ptrdiff_t>
class basic_string_span;
namespace details
{
template <typename T>
struct is_basic_string_span_oracle : std::false_type
{};
{
};
template <typename CharT, std::ptrdiff_t Extent>
struct is_basic_string_span_oracle<basic_string_span<CharT, Extent>> : std::true_type
{};
{
};
template <typename T>
struct is_basic_string_span : is_basic_string_span_oracle<std::remove_cv_t<T>>
{};
{
};
template <typename T>
struct length_func
{};
{
};
template <>
struct length_func<char>
@ -220,7 +227,6 @@ namespace details
};
}
//
// string_span and relatives
//
@ -247,19 +253,17 @@ public:
// copy
constexpr basic_string_span(const basic_string_span& other) = default;
// move
// move
#ifndef GSL_MSVC_NO_DEFAULT_MOVE_CTOR
constexpr basic_string_span(basic_string_span&& other) = default;
#else
constexpr basic_string_span(basic_string_span&& other)
: span_(std::move(other.span_))
{}
constexpr basic_string_span(basic_string_span&& other) : span_(std::move(other.span_)) {}
#endif
// assign
constexpr basic_string_span& operator=(const basic_string_span& other) = default;
// move assign
// move assign
#ifndef GSL_MSVC_NO_DEFAULT_MOVE_CTOR
constexpr basic_string_span& operator=(basic_string_span&& other) = default;
#else
@ -271,211 +275,160 @@ public:
#endif
// from nullptr
constexpr basic_string_span(std::nullptr_t ptr) noexcept
: span_(ptr)
{}
constexpr basic_string_span(std::nullptr_t ptr) noexcept : span_(ptr) {}
// from nullptr and length
constexpr basic_string_span(std::nullptr_t ptr, size_type length) noexcept
: span_(ptr, length)
{}
constexpr basic_string_span(std::nullptr_t ptr, size_type length) noexcept : span_(ptr, length)
{
}
// From static arrays - if 0-terminated, remove 0 from the view
// from static arrays and string literals
template<size_t N>
constexpr basic_string_span(value_type(&arr)[N]) noexcept
: span_(remove_z(arr))
{}
template <size_t N>
constexpr basic_string_span(value_type (&arr)[N]) noexcept : span_(remove_z(arr))
{
}
// Those allow 0s within the length, so we do not remove them
// from raw data and length
constexpr basic_string_span(pointer ptr, size_type length) noexcept
: span_(ptr, length)
{}
constexpr basic_string_span(pointer ptr, size_type length) noexcept : span_(ptr, length) {}
// from string
constexpr basic_string_span(std::string& s) noexcept
: span_(const_cast<pointer>(s.data()), narrow_cast<std::ptrdiff_t>(s.length()))
{}
{
}
// from containers. Containers must have .size() and .data() function signatures
template <typename Cont,
typename = std::enable_if_t<
!details::is_basic_string_span<Cont>::value
&& !details::is_span<Cont>::value
&& std::is_convertible<Cont::pointer, pointer>::value
&& std::is_convertible<Cont::pointer, decltype(std::declval<Cont>().data())>::value>
>
constexpr basic_string_span(Cont& cont) : span_(cont.data(), cont.size()) {}
!details::is_basic_string_span<Cont>::value && !details::is_span<Cont>::value &&
std::is_convertible<Cont::pointer, pointer>::value &&
std::is_convertible<Cont::pointer, decltype(std::declval<Cont>().data())>::value>>
constexpr basic_string_span(Cont& cont) : span_(cont.data(), cont.size())
{
}
// disallow creation from temporary containers and strings
template <typename Cont,
typename = std::enable_if_t<
!details::is_basic_string_span<Cont>::value
&& !details::is_span<Cont>::value
&& std::is_convertible<Cont::pointer, pointer>::value
&& std::is_convertible<Cont::pointer, decltype(std::declval<Cont>().data())>::value>
>
constexpr basic_string_span(const Cont& cont) : span_(cont.data(), cont.size()) {}
!details::is_basic_string_span<Cont>::value && !details::is_span<Cont>::value &&
std::is_convertible<Cont::pointer, pointer>::value &&
std::is_convertible<Cont::pointer, decltype(std::declval<Cont>().data())>::value>>
constexpr basic_string_span(const Cont& cont) : span_(cont.data(), cont.size())
{
}
#ifndef GSL_MSVC_HAS_SFINAE_SUBSTITUTION_ICE
// from span
template <typename OtherValueType, std::ptrdiff_t OtherExtent,
typename Dummy = std::enable_if_t<
std::is_convertible<span<OtherValueType, OtherExtent>, impl_type>::value
>
>
constexpr basic_string_span(span<OtherValueType, OtherExtent> other) noexcept
: span_(other)
{}
std::is_convertible<span<OtherValueType, OtherExtent>, impl_type>::value>>
constexpr basic_string_span(span<OtherValueType, OtherExtent> other) noexcept : span_(other)
{
}
#else
// from span
constexpr basic_string_span(span<value_type, Extent> other) noexcept
: span_(other)
{}
constexpr basic_string_span(span<value_type, Extent> other) noexcept : span_(other) {}
template <typename = std::enable_if_t<!std::is_same<std::remove_const_t<value_type>, value_type>::value>>
template <typename = std::enable_if_t<
!std::is_same<std::remove_const_t<value_type>, value_type>::value>>
constexpr basic_string_span(span<std::remove_const_t<value_type>, Extent> other) noexcept
: span_(other)
{}
{
}
#endif
// from string_span
template <typename OtherValueType, std::ptrdiff_t OtherExtent,
typename = std::enable_if_t<
std::is_convertible<basic_string_span<OtherValueType, OtherExtent>::impl_type, impl_type>::value
>
>
typename = std::enable_if_t<std::is_convertible<
basic_string_span<OtherValueType, OtherExtent>::impl_type, impl_type>::value>>
constexpr basic_string_span(basic_string_span<OtherValueType, OtherExtent> other) noexcept
: span_(other.data(), other.length())
{}
constexpr bool empty() const noexcept
{
return length() == 0;
}
constexpr bool empty() const noexcept { return length() == 0; }
// first Count elements
template<size_type Count>
template <size_type Count>
constexpr basic_string_span<value_type, Count> first() const noexcept
{
return{ span_.template first<Count>() };
return {span_.template first<Count>()};
}
constexpr basic_string_span<value_type, dynamic_extent> first(size_type count) const noexcept
{
return{ span_.first(count) };
return {span_.first(count)};
}
// last Count elements
template<size_type Count>
template <size_type Count>
constexpr basic_string_span<value_type, Count> last() const noexcept
{
return{ span_.template last<Count>() };
return {span_.template last<Count>()};
}
constexpr basic_string_span<value_type, dynamic_extent> last(size_type count) const noexcept
{
return{ span_.last(count) };
return {span_.last(count)};
}
// create a subview of Count elements starting from Offset
template<size_type Offset, size_type Count>
template <size_type Offset, size_type Count>
constexpr basic_string_span<value_type, Count> subspan() const noexcept
{
return{ span_.template subspan<Offset, Count>() };
return {span_.template subspan<Offset, Count>()};
}
constexpr basic_string_span<value_type, dynamic_extent> subspan(size_type offset, size_type count = dynamic_extent) const noexcept
constexpr basic_string_span<value_type, dynamic_extent>
subspan(size_type offset, size_type count = dynamic_extent) const noexcept
{
return{ span_.subspan(offset, count) };
return {span_.subspan(offset, count)};
}
constexpr reference operator[](size_type idx) const noexcept
{
return span_[idx];
}
constexpr reference operator[](size_type idx) const noexcept { return span_[idx]; }
constexpr pointer data() const noexcept
{
return span_.data();
}
constexpr pointer data() const noexcept { return span_.data(); }
// length of the span in elements
constexpr size_type length() const noexcept
{
return span_.size();
}
constexpr size_type length() const noexcept { return span_.size(); }
// length of the span in elements
constexpr size_type size() const noexcept
{
return span_.size();
}
constexpr size_type size() const noexcept { return span_.size(); }
// length of the span in bytes
constexpr size_type size_bytes() const noexcept
{
return span_.size_bytes();
}
constexpr size_type size_bytes() const noexcept { return span_.size_bytes(); }
// length of the span in bytes
constexpr size_type length_bytes() const noexcept
{
return span_.length_bytes();
}
constexpr size_type length_bytes() const noexcept { return span_.length_bytes(); }
constexpr iterator begin() const noexcept
{
return span_.begin();
}
constexpr iterator begin() const noexcept { return span_.begin(); }
constexpr iterator end() const noexcept
{
return span_.end();
}
constexpr iterator end() const noexcept { return span_.end(); }
constexpr const_iterator cbegin() const noexcept
{
return span_.cbegin();
}
constexpr const_iterator cbegin() const noexcept { return span_.cbegin(); }
constexpr const_iterator cend() const noexcept
{
return span_.cend();
}
constexpr const_iterator cend() const noexcept { return span_.cend(); }
constexpr reverse_iterator rbegin() const noexcept
{
return span_.rbegin();
}
constexpr reverse_iterator rbegin() const noexcept { return span_.rbegin(); }
constexpr reverse_iterator rend() const noexcept
{
return span_.rend();
}
constexpr reverse_iterator rend() const noexcept { return span_.rend(); }
constexpr const_reverse_iterator crbegin() const noexcept
{
return span_.crbegin();
}
constexpr const_reverse_iterator crbegin() const noexcept { return span_.crbegin(); }
constexpr const_reverse_iterator crend() const noexcept
{
return span_.crend();
}
constexpr const_reverse_iterator crend() const noexcept { return span_.crend(); }
private:
static impl_type remove_z(pointer const& sz, std::ptrdiff_t max) noexcept
{
return{ sz, details::length_func<value_type>()(sz, max)};
return {sz, details::length_func<value_type>()(sz, max)};
}
template<size_t N>
static impl_type remove_z(value_type(&sz)[N]) noexcept
template <size_t N>
static impl_type remove_z(value_type (&sz)[N]) noexcept
{
return remove_z(&sz[0], narrow_cast<std::ptrdiff_t>(N));
}
@ -483,16 +436,16 @@ private:
impl_type span_;
};
template<std::ptrdiff_t Extent = dynamic_extent>
template <std::ptrdiff_t Extent = dynamic_extent>
using string_span = basic_string_span<char, Extent>;
template<std::ptrdiff_t Extent = dynamic_extent>
template <std::ptrdiff_t Extent = dynamic_extent>
using cstring_span = basic_string_span<const char, Extent>;
template<std::ptrdiff_t Extent = dynamic_extent>
template <std::ptrdiff_t Extent = dynamic_extent>
using wstring_span = basic_string_span<wchar_t, Extent>;
template<std::ptrdiff_t Extent = dynamic_extent>
template <std::ptrdiff_t Extent = dynamic_extent>
using cwstring_span = basic_string_span<const wchar_t, Extent>;
//
@ -500,39 +453,40 @@ using cwstring_span = basic_string_span<const wchar_t, Extent>;
//
#ifndef GSL_MSVC_HAS_TYPE_DEDUCTION_BUG
template<typename CharT, ptrdiff_t Extent>
std::basic_string<typename std::remove_const<CharT>::type> to_string(basic_string_span<CharT, Extent> view)
template <typename CharT, ptrdiff_t Extent>
std::basic_string<typename std::remove_const<CharT>::type>
to_string(basic_string_span<CharT, Extent> view)
{
return{ view.data(), static_cast<size_t>(view.length()) };
return {view.data(), static_cast<size_t>(view.length())};
}
#else
inline std::string to_string(cstring_span<> view)
{
return{ view.data(), static_cast<size_t>(view.length()) };
return {view.data(), static_cast<size_t>(view.length())};
}
inline std::string to_string(string_span<> view)
{
return{ view.data(), static_cast<size_t>(view.length()) };
return {view.data(), static_cast<size_t>(view.length())};
}
inline std::wstring to_string(cwstring_span<> view)
{
return{ view.data(), static_cast<size_t>(view.length()) };
return {view.data(), static_cast<size_t>(view.length())};
}
inline std::wstring to_string(wstring_span<> view)
{
return{ view.data(), static_cast<size_t>(view.length()) };
return {view.data(), static_cast<size_t>(view.length())};
}
#endif
// zero-terminated string span, used to convert
// zero-terminated spans to legacy strings
template<typename CharT, std::ptrdiff_t Extent = dynamic_extent>
template <typename CharT, std::ptrdiff_t Extent = dynamic_extent>
class basic_zstring_span
{
public:
@ -548,8 +502,7 @@ public:
using impl_type = span<value_type, Extent>;
using string_span_type = basic_string_span<value_type, Extent>;
constexpr basic_zstring_span(impl_type s) noexcept
: span_(s)
constexpr basic_zstring_span(impl_type s) noexcept : span_(s)
{
// expects a zero-terminated span
Expects(s[s.size() - 1] == '\0');
@ -558,19 +511,17 @@ public:
// copy
constexpr basic_zstring_span(const basic_zstring_span& other) = default;
// move
// move
#ifndef GSL_MSVC_NO_DEFAULT_MOVE_CTOR
constexpr basic_zstring_span(basic_zstring_span&& other) = default;
#else
constexpr basic_zstring_span(basic_zstring_span&& other)
: span_(std::move(other.span_))
{}
constexpr basic_zstring_span(basic_zstring_span&& other) : span_(std::move(other.span_)) {}
#endif
// assign
constexpr basic_zstring_span& operator=(const basic_zstring_span& other) = default;
// move assign
// move assign
#ifndef GSL_MSVC_NO_DEFAULT_MOVE_CTOR
constexpr basic_zstring_span& operator=(basic_zstring_span&& other) = default;
#else
@ -583,7 +534,10 @@ public:
constexpr bool empty() const noexcept { return span_.size() == 0; }
constexpr string_span_type as_string_span() const noexcept { return span_.first(span_.size()-1); }
constexpr string_span_type as_string_span() const noexcept
{
return span_.first(span_.size() - 1);
}
constexpr string_span_type ensure_z() const noexcept { return gsl::ensure_z(span_); }
@ -609,9 +563,8 @@ using cwzstring_span = basic_zstring_span<const wchar_t, Max>;
// operator ==
template <typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
typename = std::enable_if_t<
std::is_convertible<T, gsl::basic_string_span<std::add_const_t<CharT>, Extent>>::value>
>
typename = std::enable_if_t<std::is_convertible<
T, gsl::basic_string_span<std::add_const_t<CharT>, Extent>>::value>>
bool operator==(gsl::basic_string_span<CharT, Extent> one, const T& other) noexcept
{
gsl::basic_string_span<std::add_const_t<CharT>, Extent> tmp(other);
@ -622,11 +575,11 @@ bool operator==(gsl::basic_string_span<CharT, Extent> one, const T& other) noexc
#endif
}
template <typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
template <
typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
typename Dummy = std::enable_if_t<
std::is_convertible<T, gsl::basic_string_span<std::add_const_t<CharT>, Extent>>::value
&& !gsl::details::is_basic_string_span<T>::value>
>
std::is_convertible<T, gsl::basic_string_span<std::add_const_t<CharT>, Extent>>::value &&
!gsl::details::is_basic_string_span<T>::value>>
bool operator==(const T& one, gsl::basic_string_span<CharT, Extent> other) noexcept
{
gsl::basic_string_span<std::add_const_t<CharT>, Extent> tmp(one);
@ -642,28 +595,28 @@ bool operator==(const T& one, gsl::basic_string_span<CharT, Extent> other) noexc
// VS treats temp and const containers as convertible to basic_string_span,
// so the cases below are already covered by the previous operators
template <typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
template <
typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
typename DataType = typename T::value_type,
typename Dummy = std::enable_if_t<
!gsl::details::is_span<T>::value
&& !gsl::details::is_basic_string_span<T>::value
&& std::is_convertible<DataType*, CharT*>::value
&& std::is_same<std::decay_t<decltype(std::declval<T>().size(), *std::declval<T>().data())>, DataType>::value>
>
!gsl::details::is_span<T>::value && !gsl::details::is_basic_string_span<T>::value &&
std::is_convertible<DataType*, CharT*>::value &&
std::is_same<std::decay_t<decltype(std::declval<T>().size(), *std::declval<T>().data())>,
DataType>::value>>
bool operator==(gsl::basic_string_span<CharT, Extent> one, const T& other) noexcept
{
gsl::basic_string_span<std::add_const_t<CharT>, Extent> tmp(other);
return std::equal(one.begin(), one.end(), tmp.begin(), tmp.end());
}
template <typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
template <
typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
typename DataType = typename T::value_type,
typename Dummy = std::enable_if_t<
!gsl::details::is_span<T>::value
&& !gsl::details::is_basic_string_span<T>::value
&& std::is_convertible<DataType*, CharT*>::value
&& std::is_same<std::decay_t<decltype(std::declval<T>().size(), *std::declval<T>().data())>, DataType>::value>
>
!gsl::details::is_span<T>::value && !gsl::details::is_basic_string_span<T>::value &&
std::is_convertible<DataType*, CharT*>::value &&
std::is_same<std::decay_t<decltype(std::declval<T>().size(), *std::declval<T>().data())>,
DataType>::value>>
bool operator==(const T& one, gsl::basic_string_span<CharT, Extent> other) noexcept
{
gsl::basic_string_span<std::add_const_t<CharT>, Extent> tmp(one);
@ -673,19 +626,18 @@ bool operator==(const T& one, gsl::basic_string_span<CharT, Extent> other) noexc
// operator !=
template <typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
typename = std::enable_if_t<
std::is_convertible<T, gsl::basic_string_span<std::add_const_t<CharT>, Extent>>::value>
>
typename = std::enable_if_t<std::is_convertible<
T, gsl::basic_string_span<std::add_const_t<CharT>, Extent>>::value>>
bool operator!=(gsl::basic_string_span<CharT, Extent> one, const T& other) noexcept
{
return !(one == other);
}
template <typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
template <
typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
typename Dummy = std::enable_if_t<
std::is_convertible<T, gsl::basic_string_span<std::add_const_t<CharT>, Extent>>::value
&& !gsl::details::is_basic_string_span<T>::value>
>
std::is_convertible<T, gsl::basic_string_span<std::add_const_t<CharT>, Extent>>::value &&
!gsl::details::is_basic_string_span<T>::value>>
bool operator!=(const T& one, gsl::basic_string_span<CharT, Extent> other) noexcept
{
return !(one == other);
@ -696,27 +648,27 @@ bool operator!=(const T& one, gsl::basic_string_span<CharT, Extent> other) noexc
// VS treats temp and const containers as convertible to basic_string_span,
// so the cases below are already covered by the previous operators
template <typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
template <
typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
typename DataType = typename T::value_type,
typename Dummy = std::enable_if_t<
!gsl::details::is_span<T>::value
&& !gsl::details::is_basic_string_span<T>::value
&& std::is_convertible<DataType*, CharT*>::value
&& std::is_same<std::decay_t<decltype(std::declval<T>().size(), *std::declval<T>().data())>, DataType>::value>
>
!gsl::details::is_span<T>::value && !gsl::details::is_basic_string_span<T>::value &&
std::is_convertible<DataType*, CharT*>::value &&
std::is_same<std::decay_t<decltype(std::declval<T>().size(), *std::declval<T>().data())>,
DataType>::value>>
bool operator!=(gsl::basic_string_span<CharT, Extent> one, const T& other) noexcept
{
return !(one == other);
}
template <typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
template <
typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
typename DataType = typename T::value_type,
typename Dummy = std::enable_if_t<
!gsl::details::is_span<T>::value
&& !gsl::details::is_basic_string_span<T>::value
&& std::is_convertible<DataType*, CharT*>::value
&& std::is_same<std::decay_t<decltype(std::declval<T>().size(), *std::declval<T>().data())>, DataType>::value>
>
!gsl::details::is_span<T>::value && !gsl::details::is_basic_string_span<T>::value &&
std::is_convertible<DataType*, CharT*>::value &&
std::is_same<std::decay_t<decltype(std::declval<T>().size(), *std::declval<T>().data())>,
DataType>::value>>
bool operator!=(const T& one, gsl::basic_string_span<CharT, Extent> other) noexcept
{
return !(one == other);
@ -725,20 +677,19 @@ bool operator!=(const T& one, gsl::basic_string_span<CharT, Extent> other) noexc
// operator<
template <typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
typename = std::enable_if_t<
std::is_convertible<T, gsl::basic_string_span<std::add_const_t<CharT>, Extent>>::value>
>
typename = std::enable_if_t<std::is_convertible<
T, gsl::basic_string_span<std::add_const_t<CharT>, Extent>>::value>>
bool operator<(gsl::basic_string_span<CharT, Extent> one, const T& other) noexcept
{
gsl::basic_string_span<std::add_const_t<CharT>, Extent> tmp(other);
return std::lexicographical_compare(one.begin(), one.end(), tmp.begin(), tmp.end());
}
template <typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
template <
typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
typename Dummy = std::enable_if_t<
std::is_convertible<T, gsl::basic_string_span<std::add_const_t<CharT>, Extent>>::value
&& !gsl::details::is_basic_string_span<T>::value>
>
std::is_convertible<T, gsl::basic_string_span<std::add_const_t<CharT>, Extent>>::value &&
!gsl::details::is_basic_string_span<T>::value>>
bool operator<(const T& one, gsl::basic_string_span<CharT, Extent> other) noexcept
{
gsl::basic_string_span<std::add_const_t<CharT>, Extent> tmp(one);
@ -750,28 +701,28 @@ bool operator<(const T& one, gsl::basic_string_span<CharT, Extent> other) noexce
// VS treats temp and const containers as convertible to basic_string_span,
// so the cases below are already covered by the previous operators
template <typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
template <
typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
typename DataType = typename T::value_type,
typename Dummy = std::enable_if_t<
!gsl::details::is_span<T>::value
&& !gsl::details::is_basic_string_span<T>::value
&& std::is_convertible<DataType*, CharT*>::value
&& std::is_same<std::decay_t<decltype(std::declval<T>().size(), *std::declval<T>().data())>, DataType>::value>
>
!gsl::details::is_span<T>::value && !gsl::details::is_basic_string_span<T>::value &&
std::is_convertible<DataType*, CharT*>::value &&
std::is_same<std::decay_t<decltype(std::declval<T>().size(), *std::declval<T>().data())>,
DataType>::value>>
bool operator<(gsl::basic_string_span<CharT, Extent> one, const T& other) noexcept
{
gsl::basic_string_span<std::add_const_t<CharT>, Extent> tmp(other);
return std::lexicographical_compare(one.begin(), one.end(), tmp.begin(), tmp.end());
}
template <typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
template <
typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
typename DataType = typename T::value_type,
typename Dummy = std::enable_if_t<
!gsl::details::is_span<T>::value
&& !gsl::details::is_basic_string_span<T>::value
&& std::is_convertible<DataType*, CharT*>::value
&& std::is_same<std::decay_t<decltype(std::declval<T>().size(), *std::declval<T>().data())>, DataType>::value>
>
!gsl::details::is_span<T>::value && !gsl::details::is_basic_string_span<T>::value &&
std::is_convertible<DataType*, CharT*>::value &&
std::is_same<std::decay_t<decltype(std::declval<T>().size(), *std::declval<T>().data())>,
DataType>::value>>
bool operator<(const T& one, gsl::basic_string_span<CharT, Extent> other) noexcept
{
gsl::basic_string_span<std::add_const_t<CharT>, Extent> tmp(one);
@ -781,19 +732,18 @@ bool operator<(const T& one, gsl::basic_string_span<CharT, Extent> other) noexce
// operator <=
template <typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
typename = std::enable_if_t<
std::is_convertible<T, gsl::basic_string_span<std::add_const_t<CharT>, Extent>>::value>
>
typename = std::enable_if_t<std::is_convertible<
T, gsl::basic_string_span<std::add_const_t<CharT>, Extent>>::value>>
bool operator<=(gsl::basic_string_span<CharT, Extent> one, const T& other) noexcept
{
return !(other < one);
}
template <typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
template <
typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
typename Dummy = std::enable_if_t<
std::is_convertible<T, gsl::basic_string_span<std::add_const_t<CharT>, Extent>>::value
&& !gsl::details::is_basic_string_span<T>::value>
>
std::is_convertible<T, gsl::basic_string_span<std::add_const_t<CharT>, Extent>>::value &&
!gsl::details::is_basic_string_span<T>::value>>
bool operator<=(const T& one, gsl::basic_string_span<CharT, Extent> other) noexcept
{
return !(other < one);
@ -804,27 +754,27 @@ bool operator<=(const T& one, gsl::basic_string_span<CharT, Extent> other) noexc
// VS treats temp and const containers as convertible to basic_string_span,
// so the cases below are already covered by the previous operators
template <typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
template <
typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
typename DataType = typename T::value_type,
typename Dummy = std::enable_if_t<
!gsl::details::is_span<T>::value
&& !gsl::details::is_basic_string_span<T>::value
&& std::is_convertible<DataType*, CharT*>::value
&& std::is_same<std::decay_t<decltype(std::declval<T>().size(), *std::declval<T>().data())>, DataType>::value>
>
!gsl::details::is_span<T>::value && !gsl::details::is_basic_string_span<T>::value &&
std::is_convertible<DataType*, CharT*>::value &&
std::is_same<std::decay_t<decltype(std::declval<T>().size(), *std::declval<T>().data())>,
DataType>::value>>
bool operator<=(gsl::basic_string_span<CharT, Extent> one, const T& other) noexcept
{
return !(other < one);
}
template <typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
template <
typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
typename DataType = typename T::value_type,
typename Dummy = std::enable_if_t<
!gsl::details::is_span<T>::value
&& !gsl::details::is_basic_string_span<T>::value
&& std::is_convertible<DataType*, CharT*>::value
&& std::is_same<std::decay_t<decltype(std::declval<T>().size(), *std::declval<T>().data())>, DataType>::value>
>
!gsl::details::is_span<T>::value && !gsl::details::is_basic_string_span<T>::value &&
std::is_convertible<DataType*, CharT*>::value &&
std::is_same<std::decay_t<decltype(std::declval<T>().size(), *std::declval<T>().data())>,
DataType>::value>>
bool operator<=(const T& one, gsl::basic_string_span<CharT, Extent> other) noexcept
{
return !(other < one);
@ -833,19 +783,18 @@ bool operator<=(const T& one, gsl::basic_string_span<CharT, Extent> other) noexc
// operator>
template <typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
typename = std::enable_if_t<
std::is_convertible<T, gsl::basic_string_span<std::add_const_t<CharT>, Extent>>::value>
>
typename = std::enable_if_t<std::is_convertible<
T, gsl::basic_string_span<std::add_const_t<CharT>, Extent>>::value>>
bool operator>(gsl::basic_string_span<CharT, Extent> one, const T& other) noexcept
{
return other < one;
}
template <typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
template <
typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
typename Dummy = std::enable_if_t<
std::is_convertible<T, gsl::basic_string_span<std::add_const_t<CharT>, Extent>>::value
&& !gsl::details::is_basic_string_span<T>::value>
>
std::is_convertible<T, gsl::basic_string_span<std::add_const_t<CharT>, Extent>>::value &&
!gsl::details::is_basic_string_span<T>::value>>
bool operator>(const T& one, gsl::basic_string_span<CharT, Extent> other) noexcept
{
return other < one;
@ -856,27 +805,27 @@ bool operator>(const T& one, gsl::basic_string_span<CharT, Extent> other) noexce
// VS treats temp and const containers as convertible to basic_string_span,
// so the cases below are already covered by the previous operators
template <typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
template <
typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
typename DataType = typename T::value_type,
typename Dummy = std::enable_if_t<
!gsl::details::is_span<T>::value
&& !gsl::details::is_basic_string_span<T>::value
&& std::is_convertible<DataType*, CharT*>::value
&& std::is_same<std::decay_t<decltype(std::declval<T>().size(), *std::declval<T>().data())>, DataType>::value>
>
!gsl::details::is_span<T>::value && !gsl::details::is_basic_string_span<T>::value &&
std::is_convertible<DataType*, CharT*>::value &&
std::is_same<std::decay_t<decltype(std::declval<T>().size(), *std::declval<T>().data())>,
DataType>::value>>
bool operator>(gsl::basic_string_span<CharT, Extent> one, const T& other) noexcept
{
return other < one;
}
template <typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
template <
typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
typename DataType = typename T::value_type,
typename Dummy = std::enable_if_t<
!gsl::details::is_span<T>::value
&& !gsl::details::is_basic_string_span<T>::value
&& std::is_convertible<DataType*, CharT*>::value
&& std::is_same<std::decay_t<decltype(std::declval<T>().size(), *std::declval<T>().data())>, DataType>::value>
>
!gsl::details::is_span<T>::value && !gsl::details::is_basic_string_span<T>::value &&
std::is_convertible<DataType*, CharT*>::value &&
std::is_same<std::decay_t<decltype(std::declval<T>().size(), *std::declval<T>().data())>,
DataType>::value>>
bool operator>(const T& one, gsl::basic_string_span<CharT, Extent> other) noexcept
{
return other < one;
@ -885,19 +834,18 @@ bool operator>(const T& one, gsl::basic_string_span<CharT, Extent> other) noexce
// operator >=
template <typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
typename = std::enable_if_t<
std::is_convertible<T, gsl::basic_string_span<std::add_const_t<CharT>, Extent>>::value>
>
typename = std::enable_if_t<std::is_convertible<
T, gsl::basic_string_span<std::add_const_t<CharT>, Extent>>::value>>
bool operator>=(gsl::basic_string_span<CharT, Extent> one, const T& other) noexcept
{
return !(one < other);
}
template <typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
template <
typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
typename Dummy = std::enable_if_t<
std::is_convertible<T, gsl::basic_string_span<std::add_const_t<CharT>, Extent>>::value
&& !gsl::details::is_basic_string_span<T>::value>
>
std::is_convertible<T, gsl::basic_string_span<std::add_const_t<CharT>, Extent>>::value &&
!gsl::details::is_basic_string_span<T>::value>>
bool operator>=(const T& one, gsl::basic_string_span<CharT, Extent> other) noexcept
{
return !(one < other);
@ -908,27 +856,27 @@ bool operator>=(const T& one, gsl::basic_string_span<CharT, Extent> other) noexc
// VS treats temp and const containers as convertible to basic_string_span,
// so the cases below are already covered by the previous operators
template <typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
template <
typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
typename DataType = typename T::value_type,
typename Dummy = std::enable_if_t<
!gsl::details::is_span<T>::value
&& !gsl::details::is_basic_string_span<T>::value
&& std::is_convertible<DataType*, CharT*>::value
&& std::is_same<std::decay_t<decltype(std::declval<T>().size(), *std::declval<T>().data())>, DataType>::value>
>
!gsl::details::is_span<T>::value && !gsl::details::is_basic_string_span<T>::value &&
std::is_convertible<DataType*, CharT*>::value &&
std::is_same<std::decay_t<decltype(std::declval<T>().size(), *std::declval<T>().data())>,
DataType>::value>>
bool operator>=(gsl::basic_string_span<CharT, Extent> one, const T& other) noexcept
{
return !(one < other);
}
template <typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
template <
typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
typename DataType = typename T::value_type,
typename Dummy = std::enable_if_t<
!gsl::details::is_span<T>::value
&& !gsl::details::is_basic_string_span<T>::value
&& std::is_convertible<DataType*, CharT*>::value
&& std::is_same<std::decay_t<decltype(std::declval<T>().size(), *std::declval<T>().data())>, DataType>::value>
>
!gsl::details::is_span<T>::value && !gsl::details::is_basic_string_span<T>::value &&
std::is_convertible<DataType*, CharT*>::value &&
std::is_same<std::decay_t<decltype(std::declval<T>().size(), *std::declval<T>().data())>,
DataType>::value>>
bool operator>=(const T& one, gsl::basic_string_span<CharT, Extent> other) noexcept
{
return !(one < other);