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3rdparty: Remove GSL

This commit is contained in:
Stenzek 2023-07-19 23:57:51 +10:00 committed by Connor McLaughlin
parent cd4daa115f
commit 1fae35231b
17 changed files with 2 additions and 2808 deletions
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63
3rdparty/include/gsl/algorithm vendored
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///////////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2015 Microsoft Corporation. All rights reserved.
//
// This code is licensed under the MIT License (MIT).
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//
///////////////////////////////////////////////////////////////////////////////
#ifndef GSL_ALGORITHM_H
#define GSL_ALGORITHM_H
#include <gsl/assert> // for Expects
#include <gsl/span> // for dynamic_extent, span
#include <algorithm> // for copy_n
#include <cstddef> // for ptrdiff_t
#include <type_traits> // for is_assignable
#ifdef _MSC_VER
#pragma warning(push)
// turn off some warnings that are noisy about our Expects statements
#pragma warning(disable : 4127) // conditional expression is constant
#pragma warning(disable : 4996) // unsafe use of std::copy_n
#endif // _MSC_VER
namespace gsl
{
// Note: this will generate faster code than std::copy using span iterator in older msvc+stl
// not necessary for msvc since VS2017 15.8 (_MSC_VER >= 1915)
template <class SrcElementType, std::size_t SrcExtent, class DestElementType,
std::size_t DestExtent>
void copy(span<SrcElementType, SrcExtent> src, span<DestElementType, DestExtent> dest)
{
static_assert(std::is_assignable<decltype(*dest.data()), decltype(*src.data())>::value,
"Elements of source span can not be assigned to elements of destination span");
static_assert(SrcExtent == dynamic_extent || DestExtent == dynamic_extent ||
(SrcExtent <= DestExtent),
"Source range is longer than target range");
Expects(dest.size() >= src.size());
// clang-format off
GSL_SUPPRESS(stl.1) // NO-FORMAT: attribute
// clang-format on
std::copy_n(src.data(), src.size(), dest.data());
}
} // namespace gsl
#ifdef _MSC_VER
#pragma warning(pop)
#endif // _MSC_VER
#endif // GSL_ALGORITHM_H

136
3rdparty/include/gsl/assert vendored
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///////////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2015 Microsoft Corporation. All rights reserved.
//
// This code is licensed under the MIT License (MIT).
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//
///////////////////////////////////////////////////////////////////////////////
#ifndef GSL_CONTRACTS_H
#define GSL_CONTRACTS_H
//
// Temporary until MSVC STL supports no-exceptions mode.
// Currently terminate is a no-op in this mode, so we add termination behavior back
//
#if defined(_MSC_VER) && (defined(_KERNEL_MODE) || (defined(_HAS_EXCEPTIONS) && !_HAS_EXCEPTIONS))
#define GSL_KERNEL_MODE
#define GSL_MSVC_USE_STL_NOEXCEPTION_WORKAROUND
#include <intrin.h>
#define RANGE_CHECKS_FAILURE 0
#if defined(__clang__)
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Winvalid-noreturn"
#endif // defined(__clang__)
#else // defined(_MSC_VER) && (defined(_KERNEL_MODE) || (defined(_HAS_EXCEPTIONS) &&
// !_HAS_EXCEPTIONS))
#include <exception>
#endif // defined(_MSC_VER) && (defined(_KERNEL_MODE) || (defined(_HAS_EXCEPTIONS) &&
// !_HAS_EXCEPTIONS))
//
// make suppress attributes parse for some compilers
// Hopefully temporary until suppression standardization occurs
//
#if defined(__clang__)
#define GSL_SUPPRESS(x) [[gsl::suppress("x")]]
#else
#if defined(_MSC_VER) && !defined(__INTEL_COMPILER)
#define GSL_SUPPRESS(x) [[gsl::suppress(x)]]
#else
#define GSL_SUPPRESS(x)
#endif // _MSC_VER
#endif // __clang__
#define GSL_STRINGIFY_DETAIL(x) #x
#define GSL_STRINGIFY(x) GSL_STRINGIFY_DETAIL(x)
#if defined(__clang__) || defined(__GNUC__)
#define GSL_LIKELY(x) __builtin_expect(!!(x), 1)
#define GSL_UNLIKELY(x) __builtin_expect(!!(x), 0)
#else
#define GSL_LIKELY(x) (!!(x))
#define GSL_UNLIKELY(x) (!!(x))
#endif // defined(__clang__) || defined(__GNUC__)
//
// GSL_ASSUME(cond)
//
// Tell the optimizer that the predicate cond must hold. It is unspecified
// whether or not cond is actually evaluated.
//
#ifdef _MSC_VER
#define GSL_ASSUME(cond) __assume(cond)
#elif defined(__GNUC__)
#define GSL_ASSUME(cond) ((cond) ? static_cast<void>(0) : __builtin_unreachable())
#else
#define GSL_ASSUME(cond) static_cast<void>((cond) ? 0 : 0)
#endif
//
// GSL.assert: assertions
//
namespace gsl
{
namespace details
{
#if defined(GSL_MSVC_USE_STL_NOEXCEPTION_WORKAROUND)
typedef void(__cdecl* terminate_handler)();
// clang-format off
GSL_SUPPRESS(f.6) // NO-FORMAT: attribute
// clang-format on
[[noreturn]] inline void __cdecl default_terminate_handler()
{
__fastfail(RANGE_CHECKS_FAILURE);
}
inline gsl::details::terminate_handler& get_terminate_handler() noexcept
{
static terminate_handler handler = &default_terminate_handler;
return handler;
}
#endif // defined(GSL_MSVC_USE_STL_NOEXCEPTION_WORKAROUND)
[[noreturn]] inline void terminate() noexcept
{
#if defined(GSL_MSVC_USE_STL_NOEXCEPTION_WORKAROUND)
(*gsl::details::get_terminate_handler())();
#else
std::terminate();
#endif // defined(GSL_MSVC_USE_STL_NOEXCEPTION_WORKAROUND)
}
} // namespace details
} // namespace gsl
#define GSL_CONTRACT_CHECK(type, cond) \
(GSL_LIKELY(cond) ? static_cast<void>(0) : gsl::details::terminate())
#define Expects(cond) GSL_CONTRACT_CHECK("Precondition", cond)
#define Ensures(cond) GSL_CONTRACT_CHECK("Postcondition", cond)
#if defined(GSL_MSVC_USE_STL_NOEXCEPTION_WORKAROUND) && defined(__clang__)
#pragma clang diagnostic pop
#endif
#endif // GSL_CONTRACTS_H

213
3rdparty/include/gsl/byte vendored
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///////////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2015 Microsoft Corporation. All rights reserved.
//
// This code is licensed under the MIT License (MIT).
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//
///////////////////////////////////////////////////////////////////////////////
#ifndef GSL_BYTE_H
#define GSL_BYTE_H
//
// make suppress attributes work for some compilers
// Hopefully temporary until suppression standardization occurs
//
#if defined(__clang__)
#define GSL_SUPPRESS(x) [[gsl::suppress("x")]]
#else
#if defined(_MSC_VER) && !defined(__INTEL_COMPILER)
#define GSL_SUPPRESS(x) [[gsl::suppress(x)]]
#else
#define GSL_SUPPRESS(x)
#endif // _MSC_VER
#endif // __clang__
#include <type_traits>
// VS2017 15.8 added support for the __cpp_lib_byte definition
// To do: drop _HAS_STD_BYTE when support for pre 15.8 expires
#ifdef _MSC_VER
#pragma warning(push)
// Turn MSVC /analyze rules that generate too much noise. TODO: fix in the tool.
#pragma warning(disable : 26493) // don't use c-style casts // TODO: MSVC suppression in templates
// does not always work
#ifndef GSL_USE_STD_BYTE
// this tests if we are under MSVC and the standard lib has std::byte and it is enabled
#if (defined(_HAS_STD_BYTE) && _HAS_STD_BYTE) || \
(defined(__cpp_lib_byte) && __cpp_lib_byte >= 201603)
#define GSL_USE_STD_BYTE 1
#else // (defined(_HAS_STD_BYTE) && _HAS_STD_BYTE) || (defined(__cpp_lib_byte) && __cpp_lib_byte >=
// 201603)
#define GSL_USE_STD_BYTE 0
#endif // (defined(_HAS_STD_BYTE) && _HAS_STD_BYTE) || (defined(__cpp_lib_byte) && __cpp_lib_byte >=
// 201603)
#endif // GSL_USE_STD_BYTE
#else // _MSC_VER
#ifndef GSL_USE_STD_BYTE
#include <cstddef> /* __cpp_lib_byte */
// this tests if we are under GCC or Clang with enough -std=c++1z power to get us std::byte
// also check if libc++ version is sufficient (> 5.0) or libstdc++ actually contains std::byte
#if defined(__cplusplus) && (__cplusplus >= 201703L) && \
(defined(__cpp_lib_byte) && (__cpp_lib_byte >= 201603) || \
defined(_LIBCPP_VERSION) && (_LIBCPP_VERSION >= 5000))
#define GSL_USE_STD_BYTE 1
#else // defined(__cplusplus) && (__cplusplus >= 201703L) &&
// (defined(__cpp_lib_byte) && (__cpp_lib_byte >= 201603) ||
// defined(_LIBCPP_VERSION) && (_LIBCPP_VERSION >= 5000))
#define GSL_USE_STD_BYTE 0
#endif // defined(__cplusplus) && (__cplusplus >= 201703L) &&
// (defined(__cpp_lib_byte) && (__cpp_lib_byte >= 201603) ||
// defined(_LIBCPP_VERSION) && (_LIBCPP_VERSION >= 5000))
#endif // GSL_USE_STD_BYTE
#endif // _MSC_VER
// Use __may_alias__ attribute on gcc and clang
#if defined __clang__ || (defined(__GNUC__) && __GNUC__ > 5)
#define byte_may_alias __attribute__((__may_alias__))
#else // defined __clang__ || defined __GNUC__
#define byte_may_alias
#endif // defined __clang__ || defined __GNUC__
#if GSL_USE_STD_BYTE
#include <cstddef>
#endif
namespace gsl
{
#if GSL_USE_STD_BYTE
using std::byte;
using std::to_integer;
#else // GSL_USE_STD_BYTE
// This is a simple definition for now that allows
// use of byte within span<> to be standards-compliant
enum class byte_may_alias 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 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);
}
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 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 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 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 static_cast<IntegerType>(b);
}
#endif // GSL_USE_STD_BYTE
template <bool E, typename T>
constexpr byte to_byte_impl(T t) noexcept
{
static_assert(
E, "gsl::to_byte(t) must be provided an unsigned char, otherwise data loss may occur. "
"If you are calling to_byte with an integer contant use: gsl::to_byte<t>() version.");
return static_cast<byte>(t);
}
template <>
// NOTE: need suppression since c++14 does not allow "return {t}"
// GSL_SUPPRESS(type.4) // NO-FORMAT: attribute // TODO: suppression does not work
constexpr byte to_byte_impl<true, unsigned char>(unsigned char t) noexcept
{
return byte(t);
}
template <typename T>
constexpr byte to_byte(T t) noexcept
{
return to_byte_impl<std::is_same<T, unsigned char>::value, T>(t);
}
template <int I>
constexpr byte to_byte() noexcept
{
static_assert(I >= 0 && I <= 255,
"gsl::byte only has 8 bits of storage, values must be in range 0-255");
return static_cast<byte>(I);
}
} // namespace gsl
#ifdef _MSC_VER
#pragma warning(pop)
#endif // _MSC_VER
#endif // GSL_BYTE_H

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3rdparty/include/gsl/gsl vendored
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///////////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2015 Microsoft Corporation. All rights reserved.
//
// This code is licensed under the MIT License (MIT).
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//
///////////////////////////////////////////////////////////////////////////////
#ifndef GSL_GSL_H
#define GSL_GSL_H
#include <gsl/algorithm> // copy
#include <gsl/assert> // Ensures/Expects
#include <gsl/byte> // byte
#include <gsl/pointers> // owner, not_null
#include <gsl/span> // span
#include <gsl/string_span> // zstring, string_span, zstring_builder...
#include <gsl/util> // finally()/narrow_cast()...
#ifdef __cpp_exceptions
#include <gsl/narrow> // narrow()
#endif
#endif // GSL_GSL_H

4
3rdparty/include/gsl/gsl_algorithm vendored
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#pragma once
#pragma message( \
"This header will soon be removed. Use <gsl/algorithm> instead of <gsl/gsl_algorithm>")
#include <gsl/algorithm>

3
3rdparty/include/gsl/gsl_assert vendored
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#pragma once
#pragma message("This header will soon be removed. Use <gsl/assert> instead of <gsl/gsl_assert>")
#include <gsl/assert>

3
3rdparty/include/gsl/gsl_byte vendored
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#pragma once
#pragma message("This header will soon be removed. Use <gsl/byte> instead of <gsl/gsl_byte>")
#include <gsl/byte>

3
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#pragma once
#pragma message("This header will soon be removed. Use <gsl/narrow> instead of <gsl/gsl_narrow>")
#include <gsl/narrow>

3
3rdparty/include/gsl/gsl_util vendored
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#pragma once
#pragma message("This header will soon be removed. Use <gsl/util> instead of <gsl/gsl_util>")
#include <gsl/util>

71
3rdparty/include/gsl/narrow vendored
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///////////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2015 Microsoft Corporation. All rights reserved.
//
// This code is licensed under the MIT License (MIT).
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//
///////////////////////////////////////////////////////////////////////////////
#ifndef GSL_NARROW_H
#define GSL_NARROW_H
#include <gsl/assert> // for Expects
#include <gsl/util> // for narrow_cast
namespace gsl
{
struct narrowing_error : public std::exception
{
const char* what() const noexcept override { return "narrowing_error"; }
};
// narrow() : a checked version of narrow_cast() that throws if the cast changed the value
template <class T, class U, typename std::enable_if<std::is_arithmetic<T>::value>::type* = nullptr>
// clang-format off
GSL_SUPPRESS(type.1) // NO-FORMAT: attribute
GSL_SUPPRESS(f.6) // NO-FORMAT: attribute // TODO: MSVC /analyze does not recognise noexcept(false)
// clang-format on
constexpr T narrow(U u) noexcept(false)
{
constexpr const bool is_different_signedness =
(std::is_signed<T>::value != std::is_signed<U>::value);
GSL_SUPPRESS(es.103) // NO-FORMAT: attribute // don't overflow
GSL_SUPPRESS(es.104) // NO-FORMAT: attribute // don't underflow
GSL_SUPPRESS(p.2) // NO-FORMAT: attribute // don't rely on undefined behavior
const T t = narrow_cast<T>(u); // While this is technically undefined behavior in some cases (i.e., if the source value is of floating-point type
// and cannot fit into the destination integral type), the resultant behavior is benign on the platforms
// that we target (i.e., no hardware trap representations are hit).
if (static_cast<U>(t) != u || (is_different_signedness && ((t < T{}) != (u < U{}))))
{
throw narrowing_error{};
}
return t;
}
template <class T, class U, typename std::enable_if<!std::is_arithmetic<T>::value>::type* = nullptr>
// clang-format off
GSL_SUPPRESS(type.1) // NO-FORMAT: attribute
GSL_SUPPRESS(f.6) // NO-FORMAT: attribute // TODO: MSVC /analyze does not recognise noexcept(false)
// clang-format on
constexpr T narrow(U u) noexcept(false)
{
const T t = narrow_cast<T>(u);
if (static_cast<U>(t) != u)
{
throw narrowing_error{};
}
return t;
}
} // namespace gsl
#endif // GSL_NARROW_H

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3rdparty/include/gsl/pointers vendored
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///////////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2015 Microsoft Corporation. All rights reserved.
//
// This code is licensed under the MIT License (MIT).
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//
///////////////////////////////////////////////////////////////////////////////
#ifndef GSL_POINTERS_H
#define GSL_POINTERS_H
#include <gsl/assert> // for Ensures, Expects
#include <algorithm> // for forward
#include <cstddef> // for ptrdiff_t, nullptr_t, size_t
#include <memory> // for shared_ptr, unique_ptr
#include <system_error> // for hash
#include <type_traits> // for enable_if_t, is_convertible, is_assignable
#if !defined(GSL_NO_IOSTREAMS)
#include <iosfwd> // for ostream
#endif // !defined(GSL_NO_IOSTREAMS)
namespace gsl
{
namespace details
{
template <typename T, typename = void>
struct is_comparable_to_nullptr : std::false_type
{
};
template <typename T>
struct is_comparable_to_nullptr<
T,
std::enable_if_t<std::is_convertible<decltype(std::declval<T>() != nullptr), bool>::value>>
: std::true_type
{
};
} // namespace details
//
// GSL.owner: ownership pointers
//
using std::shared_ptr;
using std::unique_ptr;
//
// owner
//
// owner<T> is designed as a bridge for code that must deal directly with owning pointers for some
// reason
//
// T must be a pointer type
// - disallow construction from any type other than pointer type
//
template <class T, class = std::enable_if_t<std::is_pointer<T>::value>>
using owner = T;
//
// not_null
//
// Restricts a pointer or smart pointer to only hold non-null values.
//
// Has zero size overhead over T.
//
// If T is a pointer (i.e. T == U*) then
// - allow construction from U*
// - disallow construction from nullptr_t
// - disallow default construction
// - ensure construction from null U* fails
// - allow implicit conversion to U*
//
template <class T>
class not_null
{
public:
static_assert(details::is_comparable_to_nullptr<T>::value, "T cannot be compared to nullptr.");
template <typename U, typename = std::enable_if_t<std::is_convertible<U, T>::value>>
constexpr not_null(U&& u) : ptr_(std::forward<U>(u))
{
Expects(ptr_ != nullptr);
}
template <typename = std::enable_if_t<!std::is_same<std::nullptr_t, T>::value>>
constexpr not_null(T u) : ptr_(std::move(u))
{
Expects(ptr_ != nullptr);
}
template <typename U, typename = std::enable_if_t<std::is_convertible<U, T>::value>>
constexpr not_null(const not_null<U>& other) : not_null(other.get())
{}
not_null(const not_null& other) = default;
not_null& operator=(const not_null& other) = default;
constexpr std::conditional_t<std::is_copy_constructible<T>::value, T, const T&> get() const
{
Ensures(ptr_ != nullptr);
return ptr_;
}
constexpr operator T() const { return get(); }
constexpr decltype(auto) operator->() const { return get(); }
constexpr decltype(auto) operator*() const { return *get(); }
// prevents compilation when someone attempts to assign a null pointer constant
not_null(std::nullptr_t) = delete;
not_null& operator=(std::nullptr_t) = delete;
// unwanted operators...pointers only point to single objects!
not_null& operator++() = delete;
not_null& operator--() = delete;
not_null operator++(int) = delete;
not_null operator--(int) = delete;
not_null& operator+=(std::ptrdiff_t) = delete;
not_null& operator-=(std::ptrdiff_t) = delete;
void operator[](std::ptrdiff_t) const = delete;
private:
T ptr_;
};
template <class T>
auto make_not_null(T&& t) noexcept
{
return not_null<std::remove_cv_t<std::remove_reference_t<T>>>{std::forward<T>(t)};
}
#if !defined(GSL_NO_IOSTREAMS)
template <class T>
std::ostream& operator<<(std::ostream& os, const not_null<T>& val)
{
os << val.get();
return os;
}
#endif // !defined(GSL_NO_IOSTREAMS)
template <class T, class U>
auto operator==(const not_null<T>& lhs,
const not_null<U>& rhs) noexcept(noexcept(lhs.get() == rhs.get()))
-> decltype(lhs.get() == rhs.get())
{
return lhs.get() == rhs.get();
}
template <class T, class U>
auto operator!=(const not_null<T>& lhs,
const not_null<U>& rhs) noexcept(noexcept(lhs.get() != rhs.get()))
-> decltype(lhs.get() != rhs.get())
{
return lhs.get() != rhs.get();
}
template <class T, class U>
auto operator<(const not_null<T>& lhs,
const not_null<U>& rhs) noexcept(noexcept(lhs.get() < rhs.get()))
-> decltype(lhs.get() < rhs.get())
{
return lhs.get() < rhs.get();
}
template <class T, class U>
auto operator<=(const not_null<T>& lhs,
const not_null<U>& rhs) noexcept(noexcept(lhs.get() <= rhs.get()))
-> decltype(lhs.get() <= rhs.get())
{
return lhs.get() <= rhs.get();
}
template <class T, class U>
auto operator>(const not_null<T>& lhs,
const not_null<U>& rhs) noexcept(noexcept(lhs.get() > rhs.get()))
-> decltype(lhs.get() > rhs.get())
{
return lhs.get() > rhs.get();
}
template <class T, class U>
auto operator>=(const not_null<T>& lhs,
const not_null<U>& rhs) noexcept(noexcept(lhs.get() >= rhs.get()))
-> decltype(lhs.get() >= rhs.get())
{
return lhs.get() >= rhs.get();
}
// more unwanted operators
template <class T, class U>
std::ptrdiff_t operator-(const not_null<T>&, const not_null<U>&) = delete;
template <class T>
not_null<T> operator-(const not_null<T>&, std::ptrdiff_t) = delete;
template <class T>
not_null<T> operator+(const not_null<T>&, std::ptrdiff_t) = delete;
template <class T>
not_null<T> operator+(std::ptrdiff_t, const not_null<T>&) = delete;
} // namespace gsl
namespace std
{
template <class T>
struct hash<gsl::not_null<T>>
{
std::size_t operator()(const gsl::not_null<T>& value) const { return hash<T>{}(value.get()); }
};
} // namespace std
namespace gsl
{
//
// strict_not_null
//
// Restricts a pointer or smart pointer to only hold non-null values,
//
// - provides a strict (i.e. explicit constructor from T) wrapper of not_null
// - to be used for new code that wishes the design to be cleaner and make not_null
// checks intentional, or in old code that would like to make the transition.
//
// To make the transition from not_null, incrementally replace not_null
// by strict_not_null and fix compilation errors
//
// Expect to
// - remove all unneeded conversions from raw pointer to not_null and back
// - make API clear by specifying not_null in parameters where needed
// - remove unnecessary asserts
//
template <class T>
class strict_not_null : public not_null<T>
{
public:
template <typename U, typename = std::enable_if_t<std::is_convertible<U, T>::value>>
constexpr explicit strict_not_null(U&& u) : not_null<T>(std::forward<U>(u))
{}
template <typename = std::enable_if_t<!std::is_same<std::nullptr_t, T>::value>>
constexpr explicit strict_not_null(T u) : not_null<T>(u)
{}
template <typename U, typename = std::enable_if_t<std::is_convertible<U, T>::value>>
constexpr strict_not_null(const not_null<U>& other) : not_null<T>(other)
{}
template <typename U, typename = std::enable_if_t<std::is_convertible<U, T>::value>>
constexpr strict_not_null(const strict_not_null<U>& other) : not_null<T>(other)
{}
strict_not_null(strict_not_null&& other) = default;
strict_not_null(const strict_not_null& other) = default;
strict_not_null& operator=(const strict_not_null& other) = default;
strict_not_null& operator=(const not_null<T>& other)
{
not_null<T>::operator=(other);
return *this;
}
// prevents compilation when someone attempts to assign a null pointer constant
strict_not_null(std::nullptr_t) = delete;
strict_not_null& operator=(std::nullptr_t) = delete;
// unwanted operators...pointers only point to single objects!
strict_not_null& operator++() = delete;
strict_not_null& operator--() = delete;
strict_not_null operator++(int) = delete;
strict_not_null operator--(int) = delete;
strict_not_null& operator+=(std::ptrdiff_t) = delete;
strict_not_null& operator-=(std::ptrdiff_t) = delete;
void operator[](std::ptrdiff_t) const = delete;
};
// more unwanted operators
template <class T, class U>
std::ptrdiff_t operator-(const strict_not_null<T>&, const strict_not_null<U>&) = delete;
template <class T>
strict_not_null<T> operator-(const strict_not_null<T>&, std::ptrdiff_t) = delete;
template <class T>
strict_not_null<T> operator+(const strict_not_null<T>&, std::ptrdiff_t) = delete;
template <class T>
strict_not_null<T> operator+(std::ptrdiff_t, const strict_not_null<T>&) = delete;
template <class T>
auto make_strict_not_null(T&& t) noexcept
{
return strict_not_null<std::remove_cv_t<std::remove_reference_t<T>>>{std::forward<T>(t)};
}
#if (defined(__cpp_deduction_guides) && (__cpp_deduction_guides >= 201611L))
// deduction guides to prevent the ctad-maybe-unsupported warning
template <class T>
not_null(T) -> not_null<T>;
template <class T>
strict_not_null(T) -> strict_not_null<T>;
#endif // ( defined(__cpp_deduction_guides) && (__cpp_deduction_guides >= 201611L) )
} // namespace gsl
namespace std
{
template <class T>
struct hash<gsl::strict_not_null<T>>
{
std::size_t operator()(const gsl::strict_not_null<T>& value) const
{
return hash<T>{}(value.get());
}
};
} // namespace std
#endif // GSL_POINTERS_H

821
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@ -1,821 +0,0 @@
///////////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2015 Microsoft Corporation. All rights reserved.
//
// This code is licensed under the MIT License (MIT).
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//
///////////////////////////////////////////////////////////////////////////////
#ifndef GSL_SPAN_H
#define GSL_SPAN_H
#include <gsl/assert> // for Expects
#include <gsl/byte> // for byte
#include <gsl/util> // for narrow_cast
#include <array> // for array
#include <cstddef> // for ptrdiff_t, size_t, nullptr_t
#include <gsl/span_ext> // for span specialization of gsl::at and other span-related extensions
#include <iterator> // for reverse_iterator, distance, random_access_...
#include <type_traits> // for enable_if_t, declval, is_convertible, inte...
#if defined(_MSC_VER) && !defined(__clang__)
#pragma warning(push)
// turn off some warnings that are noisy about our Expects statements
#pragma warning(disable : 4127) // conditional expression is constant
#pragma warning( \
disable : 4146) // unary minus operator applied to unsigned type, result still unsigned
#pragma warning(disable : 4702) // unreachable code
// Turn MSVC /analyze rules that generate too much noise. TODO: fix in the tool.
#pragma warning(disable : 26495) // uninitalized member when constructor calls constructor
#pragma warning(disable : 26446) // parser bug does not allow attributes on some templates
#endif // _MSC_VER
// See if we have enough C++17 power to use a static constexpr data member
// without needing an out-of-line definition
#if !(defined(__cplusplus) && (__cplusplus >= 201703L))
#define GSL_USE_STATIC_CONSTEXPR_WORKAROUND
#endif // !(defined(__cplusplus) && (__cplusplus >= 201703L))
// 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 indiscriminately, but
// could check if the source value actually doesn't fit into the target type
// and only warn in those cases.
#if defined(__GNUC__) && __GNUC__ > 6
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wsign-conversion"
#endif
namespace gsl
{
// implementation details
namespace details
{
template <class T>
struct is_span_oracle : std::false_type
{
};
template <class ElementType, std::size_t Extent>
struct is_span_oracle<gsl::span<ElementType, Extent>> : std::true_type
{
};
template <class T>
struct is_span : public is_span_oracle<std::remove_cv_t<T>>
{
};
template <class T>
struct is_std_array_oracle : std::false_type
{
};
template <class ElementType, std::size_t Extent>
struct is_std_array_oracle<std::array<ElementType, Extent>> : std::true_type
{
};
template <class T>
struct is_std_array : is_std_array_oracle<std::remove_cv_t<T>>
{
};
template <std::size_t From, std::size_t To>
struct is_allowed_extent_conversion
: std::integral_constant<bool, From == To || To == dynamic_extent>
{
};
template <class From, class To>
struct is_allowed_element_type_conversion
: std::integral_constant<bool, std::is_convertible<From (*)[], To (*)[]>::value>
{
};
template <class Type>
class span_iterator
{
public:
using iterator_category = std::random_access_iterator_tag;
using value_type = std::remove_cv_t<Type>;
using difference_type = std::ptrdiff_t;
using pointer = Type*;
using reference = Type&;
#ifdef _MSC_VER
using _Unchecked_type = pointer;
#endif // _MSC_VER
constexpr span_iterator() = default;
constexpr span_iterator(pointer begin, pointer end, pointer current)
: begin_(begin), end_(end), current_(current)
{}
constexpr operator span_iterator<const Type>() const noexcept
{
return {begin_, end_, current_};
}
constexpr reference operator*() const noexcept
{
Expects(begin_ && end_);
Expects(begin_ <= current_ && current_ < end_);
return *current_;
}
constexpr pointer operator->() const noexcept
{
Expects(begin_ && end_);
Expects(begin_ <= current_ && current_ < end_);
return current_;
}
constexpr span_iterator& operator++() noexcept
{
Expects(begin_ && current_ && end_);
Expects(current_ < end_);
// clang-format off
GSL_SUPPRESS(bounds.1) // NO-FORMAT: attribute
// clang-format on
++current_;
return *this;
}
constexpr span_iterator operator++(int) noexcept
{
span_iterator ret = *this;
++*this;
return ret;
}
constexpr span_iterator& operator--() noexcept
{
Expects(begin_ && end_);
Expects(begin_ < current_);
--current_;
return *this;
}
constexpr span_iterator operator--(int) noexcept
{
span_iterator ret = *this;
--*this;
return ret;
}
constexpr span_iterator& operator+=(const difference_type n) noexcept
{
if (n != 0) Expects(begin_ && current_ && end_);
if (n > 0) Expects(end_ - current_ >= n);
if (n < 0) Expects(current_ - begin_ >= -n);
// clang-format off
GSL_SUPPRESS(bounds.1) // NO-FORMAT: attribute
// clang-format on
current_ += n;
return *this;
}
constexpr span_iterator operator+(const difference_type n) const noexcept
{
span_iterator ret = *this;
ret += n;
return ret;
}
friend constexpr span_iterator operator+(const difference_type n,
const span_iterator& rhs) noexcept
{
return rhs + n;
}
constexpr span_iterator& operator-=(const difference_type n) noexcept
{
if (n != 0) Expects(begin_ && current_ && end_);
if (n > 0) Expects(current_ - begin_ >= n);
if (n < 0) Expects(end_ - current_ >= -n);
current_ -= n;
return *this;
}
constexpr span_iterator operator-(const difference_type n) const noexcept
{
span_iterator ret = *this;
ret -= n;
return ret;
}
template <
class Type2,
std::enable_if_t<std::is_same<std::remove_cv_t<Type2>, value_type>::value, int> = 0>
constexpr difference_type operator-(const span_iterator<Type2>& rhs) const noexcept
{
Expects(begin_ == rhs.begin_ && end_ == rhs.end_);
return current_ - rhs.current_;
}
constexpr reference operator[](const difference_type n) const noexcept
{
return *(*this + n);
}
template <
class Type2,
std::enable_if_t<std::is_same<std::remove_cv_t<Type2>, value_type>::value, int> = 0>
constexpr bool operator==(const span_iterator<Type2>& rhs) const noexcept
{
Expects(begin_ == rhs.begin_ && end_ == rhs.end_);
return current_ == rhs.current_;
}
template <
class Type2,
std::enable_if_t<std::is_same<std::remove_cv_t<Type2>, value_type>::value, int> = 0>
constexpr bool operator!=(const span_iterator<Type2>& rhs) const noexcept
{
return !(*this == rhs);
}
template <
class Type2,
std::enable_if_t<std::is_same<std::remove_cv_t<Type2>, value_type>::value, int> = 0>
constexpr bool operator<(const span_iterator<Type2>& rhs) const noexcept
{
Expects(begin_ == rhs.begin_ && end_ == rhs.end_);
return current_ < rhs.current_;
}
template <
class Type2,
std::enable_if_t<std::is_same<std::remove_cv_t<Type2>, value_type>::value, int> = 0>
constexpr bool operator>(const span_iterator<Type2>& rhs) const noexcept
{
return rhs < *this;
}
template <
class Type2,
std::enable_if_t<std::is_same<std::remove_cv_t<Type2>, value_type>::value, int> = 0>
constexpr bool operator<=(const span_iterator<Type2>& rhs) const noexcept
{
return !(rhs < *this);
}
template <
class Type2,
std::enable_if_t<std::is_same<std::remove_cv_t<Type2>, value_type>::value, int> = 0>
constexpr bool operator>=(const span_iterator<Type2>& rhs) const noexcept
{
return !(*this < rhs);
}
#ifdef _MSC_VER
// MSVC++ iterator debugging support; allows STL algorithms in 15.8+
// to unwrap span_iterator to a pointer type after a range check in STL
// algorithm calls
friend constexpr void _Verify_range(span_iterator lhs, span_iterator rhs) noexcept
{ // test that [lhs, rhs) forms a valid range inside an STL algorithm
Expects(lhs.begin_ == rhs.begin_ // range spans have to match
&& lhs.end_ == rhs.end_ &&
lhs.current_ <= rhs.current_); // range must not be transposed
}
constexpr void _Verify_offset(const difference_type n) const noexcept
{ // test that *this + n is within the range of this call
if (n != 0) Expects(begin_ && current_ && end_);
if (n > 0) Expects(end_ - current_ >= n);
if (n < 0) Expects(current_ - begin_ >= -n);
}
// clang-format off
GSL_SUPPRESS(bounds.1) // NO-FORMAT: attribute
// clang-format on
constexpr pointer _Unwrapped() const noexcept
{ // after seeking *this to a high water mark, or using one of the
// _Verify_xxx functions above, unwrap this span_iterator to a raw
// pointer
return current_;
}
// Tell the STL that span_iterator should not be unwrapped if it can't
// validate in advance, even in release / optimized builds:
#if defined(GSL_USE_STATIC_CONSTEXPR_WORKAROUND)
static constexpr const bool _Unwrap_when_unverified = false;
#else
static constexpr bool _Unwrap_when_unverified = false;
#endif
// clang-format off
GSL_SUPPRESS(con.3) // NO-FORMAT: attribute // TODO: false positive
// clang-format on
constexpr void _Seek_to(const pointer p) noexcept
{ // adjust the position of *this to previously verified location p
// after _Unwrapped
current_ = p;
}
#endif
pointer begin_ = nullptr;
pointer end_ = nullptr;
pointer current_ = nullptr;
};
template <std::size_t Ext>
class extent_type
{
public:
using size_type = std::size_t;
constexpr extent_type() noexcept = default;
constexpr explicit extent_type(extent_type<dynamic_extent>);
constexpr explicit extent_type(size_type size) { Expects(size == Ext); }
constexpr size_type size() const noexcept { return Ext; }
private:
#if defined(GSL_USE_STATIC_CONSTEXPR_WORKAROUND)
static constexpr const size_type size_ = Ext; // static size equal to Ext
#else
static constexpr size_type size_ = Ext; // static size equal to Ext
#endif
};
template <>
class extent_type<dynamic_extent>
{
public:
using size_type = std::size_t;
template <size_type Other>
constexpr explicit extent_type(extent_type<Other> ext) : size_(ext.size())
{}
constexpr explicit extent_type(size_type size) : size_(size)
{
Expects(size != dynamic_extent);
}
constexpr size_type size() const noexcept { return size_; }
private:
size_type size_;
};
template <std::size_t Ext>
constexpr extent_type<Ext>::extent_type(extent_type<dynamic_extent> ext)
{
Expects(ext.size() == Ext);
}
template <class ElementType, std::size_t Extent, std::size_t Offset, std::size_t Count>
struct calculate_subspan_type
{
using type = span<ElementType, Count != dynamic_extent
? Count
: (Extent != dynamic_extent ? Extent - Offset : Extent)>;
};
} // namespace details
// [span], class template span
template <class ElementType, std::size_t Extent>
class span
{
public:
// constants and types
using element_type = ElementType;
using value_type = std::remove_cv_t<ElementType>;
using size_type = std::size_t;
using pointer = element_type*;
using const_pointer = const element_type*;
using reference = element_type&;
using const_reference = const element_type&;
using difference_type = std::ptrdiff_t;
using iterator = details::span_iterator<ElementType>;
using reverse_iterator = std::reverse_iterator<iterator>;
#if defined(GSL_USE_STATIC_CONSTEXPR_WORKAROUND)
static constexpr const size_type extent{Extent};
#else
static constexpr size_type extent{Extent};
#endif
// [span.cons], span constructors, copy, assignment, and destructor
template <bool Dependent = false,
// "Dependent" is needed to make "std::enable_if_t<Dependent || Extent == 0 || Extent
// == dynamic_extent>" SFINAE, since "std::enable_if_t<Extent == 0 || Extent ==
// dynamic_extent>" is ill-formed when Extent is greater than 0.
class = std::enable_if_t<(Dependent ||
details::is_allowed_extent_conversion<0, Extent>::value)>>
constexpr span() noexcept : storage_(nullptr, details::extent_type<0>())
{}
template <std::size_t MyExtent = Extent, std::enable_if_t<MyExtent != dynamic_extent, int> = 0>
constexpr explicit span(pointer ptr, size_type count) noexcept : storage_(ptr, count)
{
Expects(count == Extent);
}
template <std::size_t MyExtent = Extent, std::enable_if_t<MyExtent == dynamic_extent, int> = 0>
constexpr span(pointer ptr, size_type count) noexcept : storage_(ptr, count)
{}
template <std::size_t MyExtent = Extent, std::enable_if_t<MyExtent != dynamic_extent, int> = 0>
constexpr explicit span(pointer firstElem, pointer lastElem) noexcept
: storage_(firstElem, narrow_cast<std::size_t>(lastElem - firstElem))
{
Expects(lastElem - firstElem == static_cast<difference_type>(Extent));
}
template <std::size_t MyExtent = Extent, std::enable_if_t<MyExtent == dynamic_extent, int> = 0>
constexpr span(pointer firstElem, pointer lastElem) noexcept
: storage_(firstElem, narrow_cast<std::size_t>(lastElem - firstElem))
{}
template <std::size_t N,
std::enable_if_t<details::is_allowed_extent_conversion<N, Extent>::value, int> = 0>
constexpr span(element_type (&arr)[N]) noexcept
: storage_(KnownNotNull{arr}, details::extent_type<N>())
{}
template <
class T, std::size_t N,
std::enable_if_t<(details::is_allowed_extent_conversion<N, Extent>::value &&
details::is_allowed_element_type_conversion<T, element_type>::value),
int> = 0>
constexpr span(std::array<T, N>& arr) noexcept
: storage_(KnownNotNull{arr.data()}, details::extent_type<N>())
{}
template <class T, std::size_t N,
std::enable_if_t<
(details::is_allowed_extent_conversion<N, Extent>::value &&
details::is_allowed_element_type_conversion<const T, element_type>::value),
int> = 0>
constexpr span(const std::array<T, N>& arr) noexcept
: storage_(KnownNotNull{arr.data()}, details::extent_type<N>())
{}
// NB: the SFINAE on these constructors uses .data() as an incomplete/imperfect proxy for the
// requirement on Container to be a contiguous sequence container.
template <std::size_t MyExtent = Extent, class Container,
std::enable_if_t<
MyExtent != dynamic_extent && !details::is_span<Container>::value &&
!details::is_std_array<Container>::value &&
std::is_pointer<decltype(std::declval<Container&>().data())>::value &&
std::is_convertible<
std::remove_pointer_t<decltype(std::declval<Container&>().data())> (*)[],
element_type (*)[]>::value,
int> = 0>
constexpr explicit span(Container& cont) noexcept : span(cont.data(), cont.size())
{}
template <std::size_t MyExtent = Extent, class Container,
std::enable_if_t<
MyExtent == dynamic_extent && !details::is_span<Container>::value &&
!details::is_std_array<Container>::value &&
std::is_pointer<decltype(std::declval<Container&>().data())>::value &&
std::is_convertible<
std::remove_pointer_t<decltype(std::declval<Container&>().data())> (*)[],
element_type (*)[]>::value,
int> = 0>
constexpr span(Container& cont) noexcept : span(cont.data(), cont.size())
{}
template <
std::size_t MyExtent = Extent, class Container,
std::enable_if_t<
MyExtent != dynamic_extent && std::is_const<element_type>::value &&
!details::is_span<Container>::value && !details::is_std_array<Container>::value &&
std::is_pointer<decltype(std::declval<const Container&>().data())>::value &&
std::is_convertible<
std::remove_pointer_t<decltype(std::declval<const Container&>().data())> (*)[],
element_type (*)[]>::value,
int> = 0>
constexpr explicit span(const Container& cont) noexcept : span(cont.data(), cont.size())
{}
template <
std::size_t MyExtent = Extent, class Container,
std::enable_if_t<
MyExtent == dynamic_extent && std::is_const<element_type>::value &&
!details::is_span<Container>::value && !details::is_std_array<Container>::value &&
std::is_pointer<decltype(std::declval<const Container&>().data())>::value &&
std::is_convertible<
std::remove_pointer_t<decltype(std::declval<const Container&>().data())> (*)[],
element_type (*)[]>::value,
int> = 0>
constexpr span(const Container& cont) noexcept : span(cont.data(), cont.size())
{}
constexpr span(const span& other) noexcept = default;
template <class OtherElementType, std::size_t OtherExtent, std::size_t MyExtent = Extent,
std::enable_if_t<(MyExtent == dynamic_extent || MyExtent == OtherExtent) &&
details::is_allowed_element_type_conversion<OtherElementType,
element_type>::value,
int> = 0>
constexpr span(const span<OtherElementType, OtherExtent>& other) noexcept
: storage_(other.data(), details::extent_type<OtherExtent>(other.size()))
{}
template <class OtherElementType, std::size_t OtherExtent, std::size_t MyExtent = Extent,
std::enable_if_t<MyExtent != dynamic_extent && OtherExtent == dynamic_extent &&
details::is_allowed_element_type_conversion<OtherElementType,
element_type>::value,
int> = 0>
constexpr explicit span(const span<OtherElementType, OtherExtent>& other) noexcept
: storage_(other.data(), details::extent_type<OtherExtent>(other.size()))
{}
~span() noexcept = default;
constexpr span& operator=(const span& other) noexcept = default;
// [span.sub], span subviews
template <std::size_t Count>
constexpr span<element_type, Count> first() const noexcept
{
Expects(Count <= size());
return span<element_type, Count>{data(), Count};
}
template <std::size_t Count>
// clang-format off
GSL_SUPPRESS(bounds.1) // NO-FORMAT: attribute
// clang-format on
constexpr span<element_type, Count> last() const noexcept
{
Expects(Count <= size());
return span<element_type, Count>{data() + (size() - Count), Count};
}
template <std::size_t Offset, std::size_t Count = dynamic_extent>
// clang-format off
GSL_SUPPRESS(bounds.1) // NO-FORMAT: attribute
// clang-format on
constexpr auto subspan() const noexcept ->
typename details::calculate_subspan_type<ElementType, Extent, Offset, Count>::type
{
Expects((size() >= Offset) && (Count == dynamic_extent || (Count <= size() - Offset)));
using type =
typename details::calculate_subspan_type<ElementType, Extent, Offset, Count>::type;
return type{data() + Offset, Count == dynamic_extent ? size() - Offset : Count};
}
constexpr span<element_type, dynamic_extent> first(size_type count) const noexcept
{
Expects(count <= size());
return {data(), count};
}
constexpr span<element_type, dynamic_extent> last(size_type count) const noexcept
{
Expects(count <= size());
return make_subspan(size() - count, dynamic_extent, subspan_selector<Extent>{});
}
constexpr span<element_type, dynamic_extent>
subspan(size_type offset, size_type count = dynamic_extent) const noexcept
{
return make_subspan(offset, count, subspan_selector<Extent>{});
}
// [span.obs], span observers
constexpr size_type size() const noexcept { return storage_.size(); }
constexpr size_type size_bytes() const noexcept
{
Expects(size() < dynamic_extent / sizeof(element_type));
return size() * sizeof(element_type);
}
constexpr bool empty() const noexcept { return size() == 0; }
// [span.elem], span element access
// clang-format off
GSL_SUPPRESS(bounds.1) // NO-FORMAT: attribute
// clang-format on
constexpr reference operator[](size_type idx) const noexcept
{
Expects(idx < size());
return data()[idx];
}
constexpr reference front() const noexcept
{
Expects(size() > 0);
return data()[0];
}
constexpr reference back() const noexcept
{
Expects(size() > 0);
return data()[size() - 1];
}
constexpr pointer data() const noexcept { return storage_.data(); }
// [span.iter], span iterator support
constexpr iterator begin() const noexcept
{
const auto data = storage_.data();
// clang-format off
GSL_SUPPRESS(bounds.1) // NO-FORMAT: attribute
// clang-format on
return {data, data + size(), data};
}
constexpr iterator end() const noexcept
{
const auto data = storage_.data();
// clang-format off
GSL_SUPPRESS(bounds.1) // NO-FORMAT: attribute
// clang-format on
const auto endData = data + storage_.size();
return {data, endData, endData};
}
constexpr reverse_iterator rbegin() const noexcept { return reverse_iterator{end()}; }
constexpr reverse_iterator rend() const noexcept { return reverse_iterator{begin()}; }
#ifdef _MSC_VER
// Tell MSVC how to unwrap spans in range-based-for
constexpr pointer _Unchecked_begin() const noexcept { return data(); }
constexpr pointer _Unchecked_end() const noexcept
{
// clang-format off
GSL_SUPPRESS(bounds.1) // NO-FORMAT: attribute
// clang-format on
return data() + size();
}
#endif // _MSC_VER
private:
// Needed to remove unnecessary null check in subspans
struct KnownNotNull
{
pointer p;
};
// this implementation detail class lets us take advantage of the
// empty base class optimization to pay for only storage of a single
// pointer in the case of fixed-size spans
template <class ExtentType>
class storage_type : public ExtentType
{
public:
// KnownNotNull parameter is needed to remove unnecessary null check
// in subspans and constructors from arrays
template <class OtherExtentType>
constexpr storage_type(KnownNotNull data, OtherExtentType ext)
: ExtentType(ext), data_(data.p)
{
Expects(ExtentType::size() != dynamic_extent);
}
template <class OtherExtentType>
constexpr storage_type(pointer data, OtherExtentType ext) : ExtentType(ext), data_(data)
{
Expects(ExtentType::size() != dynamic_extent);
Expects(data || ExtentType::size() == 0);
}
constexpr pointer data() const noexcept { return data_; }
private:
pointer data_;
};
storage_type<details::extent_type<Extent>> storage_;
// The rest is needed to remove unnecessary null check
// in subspans and constructors from arrays
constexpr span(KnownNotNull ptr, size_type count) noexcept : storage_(ptr, count) {}
template <std::size_t CallerExtent>
class subspan_selector
{
};
template <std::size_t CallerExtent>
constexpr span<element_type, dynamic_extent>
make_subspan(size_type offset, size_type count, subspan_selector<CallerExtent>) const noexcept
{
const span<element_type, dynamic_extent> tmp(*this);
return tmp.subspan(offset, count);
}
// clang-format off
GSL_SUPPRESS(bounds.1) // NO-FORMAT: attribute
// clang-format on
constexpr span<element_type, dynamic_extent>
make_subspan(size_type offset, size_type count, subspan_selector<dynamic_extent>) const noexcept
{
Expects(size() >= offset);
if (count == dynamic_extent) { return {KnownNotNull{data() + offset}, size() - offset}; }
Expects(size() - offset >= count);
return {KnownNotNull{data() + offset}, count};
}
};
#if (defined(__cpp_deduction_guides) && (__cpp_deduction_guides >= 201611L))
// Deduction Guides
template <class Type, std::size_t Extent>
span(Type (&)[Extent]) -> span<Type, Extent>;
template <class Type, std::size_t Size>
span(std::array<Type, Size>&) -> span<Type, Size>;
template <class Type, std::size_t Size>
span(const std::array<Type, Size>&) -> span<const Type, Size>;
template <class Container,
class Element = std::remove_pointer_t<decltype(std::declval<Container&>().data())>>
span(Container&) -> span<Element>;
template <class Container,
class Element = std::remove_pointer_t<decltype(std::declval<const Container&>().data())>>
span(const Container&) -> span<Element>;
#endif // ( defined(__cpp_deduction_guides) && (__cpp_deduction_guides >= 201611L) )
#if defined(GSL_USE_STATIC_CONSTEXPR_WORKAROUND)
template <class ElementType, std::size_t Extent>
constexpr const typename span<ElementType, Extent>::size_type span<ElementType, Extent>::extent;
#endif
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 std::size_t, but older compilers may not see it as
// constexpr
// and so will fail compilation of the template
template <class ElementType, std::size_t Extent>
struct calculate_byte_size : std::integral_constant<std::size_t, sizeof(ElementType) * Extent>
{
static_assert(Extent < dynamic_extent / sizeof(ElementType), "Size is too big.");
};
template <class ElementType>
struct calculate_byte_size<ElementType, dynamic_extent>
: std::integral_constant<std::size_t, dynamic_extent>
{
};
} // namespace details
// [span.objectrep], views of object representation
template <class ElementType, std::size_t Extent>
span<const byte, details::calculate_byte_size<ElementType, Extent>::value>
as_bytes(span<ElementType, Extent> s) noexcept
{
using type = span<const byte, details::calculate_byte_size<ElementType, Extent>::value>;
// clang-format off
GSL_SUPPRESS(type.1) // NO-FORMAT: attribute
// clang-format on
return type{reinterpret_cast<const byte*>(s.data()), s.size_bytes()};
}
template <class ElementType, std::size_t Extent,
std::enable_if_t<!std::is_const<ElementType>::value, int> = 0>
span<byte, details::calculate_byte_size<ElementType, Extent>::value>
as_writable_bytes(span<ElementType, Extent> s) noexcept
{
using type = span<byte, details::calculate_byte_size<ElementType, Extent>::value>;
// clang-format off
GSL_SUPPRESS(type.1) // NO-FORMAT: attribute
// clang-format on
return type{reinterpret_cast<byte*>(s.data()), s.size_bytes()};
}
} // namespace gsl
#if defined(_MSC_VER) && !defined(__clang__)
#pragma warning(pop)
#endif // _MSC_VER
#if defined(__GNUC__) && __GNUC__ > 6
#pragma GCC diagnostic pop
#endif // __GNUC__ > 6
#endif // GSL_SPAN_H

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@ -1,212 +0,0 @@
///////////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2015 Microsoft Corporation. All rights reserved.
//
// This code is licensed under the MIT License (MIT).
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//
///////////////////////////////////////////////////////////////////////////////
#ifndef GSL_SPAN_EXT_H
#define GSL_SPAN_EXT_H
///////////////////////////////////////////////////////////////////////////////
//
// File: span_ext
// Purpose: continue offering features that have been cut from the official
// implementation of span.
// While modernizing gsl::span a number of features needed to be removed to
// be compliant with the design of std::span
//
///////////////////////////////////////////////////////////////////////////////
#include <gsl/assert> // GSL_KERNEL_MODE
#include <gsl/util> // for narrow_cast, narrow
#include <cstddef> // for ptrdiff_t, size_t
#include <utility>
#ifndef GSL_KERNEL_MODE
#include <algorithm> // for lexicographical_compare
#endif // GSL_KERNEL_MODE
namespace gsl
{
// [span.views.constants], constants
constexpr const std::size_t dynamic_extent = narrow_cast<std::size_t>(-1);
template <class ElementType, std::size_t Extent = dynamic_extent>
class span;
// std::equal and std::lexicographical_compare are not /kernel compatible
// so all comparison operators must be removed for kernel mode.
#ifndef GSL_KERNEL_MODE
// [span.comparison], span comparison operators
template <class ElementType, std::size_t FirstExtent, std::size_t SecondExtent>
constexpr bool operator==(span<ElementType, FirstExtent> l, span<ElementType, SecondExtent> r)
{
return std::equal(l.begin(), l.end(), r.begin(), r.end());
}
template <class ElementType, std::size_t Extent>
constexpr bool operator!=(span<ElementType, Extent> l, span<ElementType, Extent> r)
{
return !(l == r);
}
template <class ElementType, std::size_t Extent>
constexpr bool operator<(span<ElementType, Extent> l, span<ElementType, Extent> r)
{
return std::lexicographical_compare(l.begin(), l.end(), r.begin(), r.end());
}
template <class ElementType, std::size_t Extent>
constexpr bool operator<=(span<ElementType, Extent> l, span<ElementType, Extent> r)
{
return !(l > r);
}
template <class ElementType, std::size_t Extent>
constexpr bool operator>(span<ElementType, Extent> l, span<ElementType, Extent> r)
{
return r < l;
}
template <class ElementType, std::size_t Extent>
constexpr bool operator>=(span<ElementType, Extent> l, span<ElementType, Extent> r)
{
return !(l < r);
}
#endif // GSL_KERNEL_MODE
//
// make_span() - Utility functions for creating spans
//
template <class ElementType>
constexpr span<ElementType> make_span(ElementType* ptr, typename span<ElementType>::size_type count)
{
return span<ElementType>(ptr, count);
}
template <class ElementType>
constexpr span<ElementType> make_span(ElementType* firstElem, ElementType* lastElem)
{
return span<ElementType>(firstElem, lastElem);
}
template <class ElementType, std::size_t N>
constexpr span<ElementType, N> make_span(ElementType (&arr)[N]) noexcept
{
return span<ElementType, N>(arr);
}
template <class Container>
constexpr span<typename Container::value_type> make_span(Container& cont)
{
return span<typename Container::value_type>(cont);
}
template <class Container>
constexpr span<const typename Container::value_type> make_span(const Container& cont)
{
return span<const typename Container::value_type>(cont);
}
template <class Ptr>
constexpr span<typename Ptr::element_type> make_span(Ptr& cont, std::size_t count)
{
return span<typename Ptr::element_type>(cont, count);
}
template <class Ptr>
constexpr span<typename Ptr::element_type> make_span(Ptr& cont)
{
return span<typename Ptr::element_type>(cont);
}
// Specialization of gsl::at for span
template <class ElementType, std::size_t Extent>
constexpr ElementType& at(span<ElementType, Extent> s, index i)
{
// No bounds checking here because it is done in span::operator[] called below
Ensures(i >= 0);
return s[narrow_cast<std::size_t>(i)];
}
// [span.obs] Free observer functions
template <class ElementType, std::size_t Extent>
constexpr std::ptrdiff_t ssize(const span<ElementType, Extent>& s) noexcept
{
return static_cast<std::ptrdiff_t>(s.size());
}
// [span.iter] Free functions for begin/end functions
template <class ElementType, std::size_t Extent>
constexpr typename span<ElementType, Extent>::iterator
begin(const span<ElementType, Extent>& s) noexcept
{
return s.begin();
}
template <class ElementType, std::size_t Extent = dynamic_extent>
constexpr typename span<ElementType, Extent>::iterator
end(const span<ElementType, Extent>& s) noexcept
{
return s.end();
}
template <class ElementType, std::size_t Extent>
constexpr typename span<ElementType, Extent>::reverse_iterator
rbegin(const span<ElementType, Extent>& s) noexcept
{
return s.rbegin();
}
template <class ElementType, std::size_t Extent>
constexpr typename span<ElementType, Extent>::reverse_iterator
rend(const span<ElementType, Extent>& s) noexcept
{
return s.rend();
}
template <class ElementType, std::size_t Extent>
constexpr typename span<ElementType, Extent>::iterator
cbegin(const span<ElementType, Extent>& s) noexcept
{
return s.begin();
}
template <class ElementType, std::size_t Extent = dynamic_extent>
constexpr typename span<ElementType, Extent>::iterator
cend(const span<ElementType, Extent>& s) noexcept
{
return s.end();
}
template <class ElementType, std::size_t Extent>
constexpr typename span<ElementType, Extent>::reverse_iterator
crbegin(const span<ElementType, Extent>& s) noexcept
{
return s.rbegin();
}
template <class ElementType, std::size_t Extent>
constexpr typename span<ElementType, Extent>::reverse_iterator
crend(const span<ElementType, Extent>& s) noexcept
{
return s.rend();
}
} // namespace gsl
#endif // GSL_SPAN_EXT_H

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///////////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2015 Microsoft Corporation. All rights reserved.
//
// This code is licensed under the MIT License (MIT).
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//
///////////////////////////////////////////////////////////////////////////////
#ifndef GSL_STRING_SPAN_H
#define GSL_STRING_SPAN_H
#include <gsl/assert> // for Ensures, Expects
#include <gsl/span_ext> // for operator!=, operator==, dynamic_extent
#include <gsl/util> // for narrow_cast
#include <algorithm> // for equal, lexicographical_compare
#include <array> // for array
#include <cstddef> // for size_t, nullptr_t
#include <cstdint> // for PTRDIFF_MAX
#include <cstring>
#include <string> // for basic_string, allocator, char_traits
#include <type_traits> // for declval, is_convertible, enable_if_t, add_...
#if defined(_MSC_VER) && !defined(__clang__)
#pragma warning(push)
// Turn MSVC /analyze rules that generate too much noise. TODO: fix in the tool.
#pragma warning(disable : 26446) // TODO: bug in parser - attributes and templates
#pragma warning(disable : 26481) // TODO: suppress does not work inside templates sometimes
#pragma warning(disable : 4996) // use of functions & classes marked [[deprecated]]
#endif // _MSC_VER
#if defined(__GNUC__) || defined(__clang__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
#endif
namespace gsl
{
//
// czstring and wzstring
//
// These are "tag" typedefs for C-style strings (i.e. null-terminated character arrays)
// that allow static analysis to help find bugs.
//
// There are no additional features/semantics that we can find a way to add inside the
// type system for these types that will not either incur significant runtime costs or
// (sometimes needlessly) break existing programs when introduced.
//
template <typename CharT, std::size_t Extent = dynamic_extent>
using basic_zstring = CharT*;
using czstring = basic_zstring<const char, dynamic_extent>;
using cwzstring = basic_zstring<const wchar_t, dynamic_extent>;
using cu16zstring = basic_zstring<const char16_t, dynamic_extent>;
using cu32zstring = basic_zstring<const char32_t, dynamic_extent>;
using zstring = basic_zstring<char, dynamic_extent>;
using wzstring = basic_zstring<wchar_t, dynamic_extent>;
using u16zstring = basic_zstring<char16_t, dynamic_extent>;
using u32zstring = basic_zstring<char32_t, dynamic_extent>;
namespace details
{
template <class CharT>
[[deprecated("string_span was removed from the C++ Core Guidelines. For more information, see "
"isocpp/CppCoreGuidelines PR#1680")]] constexpr std::size_t
string_length(const CharT* str, std::size_t n)
{
if (str == nullptr || n == dynamic_extent) return 0;
const span<const CharT> str_span{str, n};
std::size_t len = 0;
while (len < n && str_span[len]) len++;
return len;
}
} // namespace details
//
// ensure_sentinel()
//
// Provides a way to obtain an span from a contiguous sequence
// that ends with a (non-inclusive) sentinel value.
//
// Will fail-fast if sentinel cannot be found before max elements are examined.
//
template <typename T, const T Sentinel>
[[deprecated("string_span was removed from the C++ Core Guidelines. For more information, see "
"isocpp/CppCoreGuidelines PR#1680")]] constexpr span<T, dynamic_extent>
ensure_sentinel(T* seq, std::size_t max = static_cast<std::size_t>(-1))
{
Ensures(seq != nullptr);
// clang-format off
GSL_SUPPRESS(f.23) // TODO: false positive // TODO: suppress does not work
// clang-format on
auto cur = seq;
Ensures(cur != nullptr); // workaround for removing the warning
// clang-format off
GSL_SUPPRESS(bounds.1) // TODO: suppress does not work
// clang-format on
while (static_cast<std::size_t>(cur - seq) < max && *cur != Sentinel) ++cur;
Ensures(*cur == Sentinel);
return {seq, static_cast<std::size_t>(cur - seq)};
}
//
// ensure_z - creates a span for a zero terminated strings. The span will not contain the zero
// termination. Will fail fast if a null-terminator cannot be found before the limit of size_type.
//
template <typename CharT>
[[deprecated("string_span was removed from the C++ Core Guidelines. For more information, see "
"isocpp/CppCoreGuidelines PR#1680")]] constexpr span<CharT, dynamic_extent>
ensure_z(CharT* const& sz, std::size_t max = static_cast<std::size_t>(-1))
{
return ensure_sentinel<CharT, CharT(0)>(sz, max);
}
template <typename CharT, std::size_t N>
constexpr span<CharT, dynamic_extent> ensure_z(CharT (&sz)[N])
{
return ensure_z(&sz[0], N);
}
template <class Cont>
[[deprecated(
"string_span was removed from the C++ Core Guidelines. For more information, see "
"isocpp/CppCoreGuidelines PR#1680")]] constexpr span<typename std::
remove_pointer<
typename Cont::pointer>::type,
dynamic_extent>
ensure_z(Cont& cont)
{
return ensure_z(cont.data(), cont.size());
}
template <typename CharT, std::size_t>
class [[deprecated("string_span was removed from the C++ Core Guidelines. For more information, "
"see isocpp/CppCoreGuidelines PR#1680")]] basic_string_span;
namespace details
{
template <typename T>
struct [[deprecated(
"string_span was removed from the C++ Core Guidelines. For more information, "
"see isocpp/CppCoreGuidelines PR#1680")]] is_basic_string_span_oracle : std::false_type{};
template <typename CharT, std::size_t Extent>
struct [[deprecated(
"string_span was removed from the C++ Core Guidelines. For more information, see "
"isocpp/CppCoreGuidelines PR#1680")]] is_basic_string_span_oracle<basic_string_span<CharT,
Extent>>
: std::true_type{};
template <typename T>
struct [[deprecated("string_span was removed from the C++ Core Guidelines. For more "
"information, see isocpp/CppCoreGuidelines PR#1680")]] is_basic_string_span
: is_basic_string_span_oracle<std::remove_cv_t<T>>{};
} // namespace details
//
// string_span and relatives
//
template <typename CharT, std::size_t Extent = dynamic_extent>
class [[deprecated("string_span was removed from the C++ Core Guidelines. For more information, "
"see isocpp/CppCoreGuidelines PR#1680")]] basic_string_span
{
public:
using element_type = CharT;
using value_type = std::remove_cv_t<element_type>;
using pointer = std::add_pointer_t<element_type>;
using reference = std::add_lvalue_reference_t<element_type>;
using const_reference = std::add_lvalue_reference_t<std::add_const_t<element_type>>;
using impl_type = span<element_type, Extent>;
using size_type = typename impl_type::size_type;
using iterator = typename impl_type::iterator;
using reverse_iterator = typename impl_type::reverse_iterator;
// default (empty)
constexpr basic_string_span() noexcept = default;
// copy
constexpr basic_string_span(const basic_string_span& other) noexcept = default;
// assign
constexpr basic_string_span& operator=(const basic_string_span& other) noexcept = default;
constexpr basic_string_span(pointer ptr, size_type length) : span_(ptr, length) {}
constexpr basic_string_span(pointer firstElem, pointer lastElem) : span_(firstElem, lastElem) {}
// From static arrays - if 0-terminated, remove 0 from the view
// All other containers allow 0s within the length, so we do not remove them
template <std::size_t N>
constexpr basic_string_span(element_type(&arr)[N]) : span_(remove_z(arr))
{}
template <std::size_t N, class ArrayElementType = std::remove_const_t<element_type>>
constexpr basic_string_span(std::array<ArrayElementType, N> & arr) noexcept : span_(arr)
{}
template <std::size_t N, class ArrayElementType = std::remove_const_t<element_type>>
constexpr basic_string_span(const std::array<ArrayElementType, N>& arr) noexcept : span_(arr)
{}
// Container signature should work for basic_string after C++17 version exists
template <class Traits, class Allocator>
// GSL_SUPPRESS(bounds.4) // TODO: parser bug
constexpr basic_string_span(std::basic_string<element_type, Traits, Allocator> & str)
: span_(&str[0], str.length())
{}
template <class Traits, class Allocator>
constexpr basic_string_span(const std::basic_string<element_type, Traits, Allocator>& str)
: span_(&str[0], str.length())
{}
// from containers. Containers must have a pointer type and data() function signatures
template <class Container,
class = std::enable_if_t<
!details::is_basic_string_span<Container>::value &&
std::is_convertible<typename Container::pointer, pointer>::value &&
std::is_convertible<typename Container::pointer,
decltype(std::declval<Container>().data())>::value>>
constexpr basic_string_span(Container & cont) : span_(cont)
{}
template <class Container,
class = std::enable_if_t<
!details::is_basic_string_span<Container>::value &&
std::is_convertible<typename Container::pointer, pointer>::value &&
std::is_convertible<typename Container::pointer,
decltype(std::declval<Container>().data())>::value>>
constexpr basic_string_span(const Container& cont) : span_(cont)
{}
// from string_span
template <
class OtherValueType, std::size_t OtherExtent,
class = std::enable_if_t<std::is_convertible<
typename basic_string_span<OtherValueType, OtherExtent>::impl_type, impl_type>::value>>
constexpr basic_string_span(basic_string_span<OtherValueType, OtherExtent> other)
: span_(other.data(), other.length())
{}
template <size_type Count>
constexpr basic_string_span<element_type, Count> first() const
{
return {span_.template first<Count>()};
}
constexpr basic_string_span<element_type, dynamic_extent> first(size_type count) const
{
return {span_.first(count)};
}
template <size_type Count>
constexpr basic_string_span<element_type, Count> last() const
{
return {span_.template last<Count>()};
}
constexpr basic_string_span<element_type, dynamic_extent> last(size_type count) const
{
return {span_.last(count)};
}
template <size_type Offset, size_type Count>
constexpr basic_string_span<element_type, Count> subspan() const
{
return {span_.template subspan<Offset, Count>()};
}
constexpr basic_string_span<element_type, dynamic_extent> subspan(
size_type offset, size_type count = dynamic_extent) const
{
return {span_.subspan(offset, count)};
}
constexpr reference operator[](size_type idx) const { return span_[idx]; }
constexpr reference operator()(size_type idx) const { return span_[idx]; }
constexpr pointer data() const { return span_.data(); }
constexpr size_type length() const noexcept { return span_.size(); }
constexpr size_type size() const noexcept { return span_.size(); }
constexpr size_type size_bytes() const noexcept { return span_.size_bytes(); }
constexpr size_type length_bytes() const noexcept { return span_.length_bytes(); }
constexpr bool empty() const noexcept { return size() == 0; }
constexpr iterator begin() const noexcept { return span_.begin(); }
constexpr iterator end() const noexcept { return span_.end(); }
constexpr reverse_iterator rbegin() const noexcept { return span_.rbegin(); }
constexpr reverse_iterator rend() const noexcept { return span_.rend(); }
private:
static constexpr impl_type remove_z(pointer const& sz, std::size_t max)
{
return impl_type(sz, details::string_length(sz, max));
}
template <std::size_t N>
static constexpr impl_type remove_z(element_type(&sz)[N])
{
return remove_z(&sz[0], N);
}
impl_type span_;
};
template <std::size_t Extent = dynamic_extent>
using string_span [[deprecated("string_span was removed from the C++ Core Guidelines. For more "
"information, see isocpp/CppCoreGuidelines PR#1680")]] =
basic_string_span<char, Extent>;
template <std::size_t Extent = dynamic_extent>
using cstring_span [[deprecated("string_span was removed from the C++ Core Guidelines. For more "
"information, see isocpp/CppCoreGuidelines PR#1680")]] =
basic_string_span<const char, Extent>;
template <std::size_t Extent = dynamic_extent>
using wstring_span [[deprecated("string_span was removed from the C++ Core Guidelines. For more "
"information, see isocpp/CppCoreGuidelines PR#1680")]] =
basic_string_span<wchar_t, Extent>;
template <std::size_t Extent = dynamic_extent>
using cwstring_span [[deprecated("string_span was removed from the C++ Core Guidelines. For more "
"information, see isocpp/CppCoreGuidelines PR#1680")]] =
basic_string_span<const wchar_t, Extent>;
template <std::size_t Extent = dynamic_extent>
using u16string_span [[deprecated("string_span was removed from the C++ Core Guidelines. For more "
"information, see isocpp/CppCoreGuidelines PR#1680")]] =
basic_string_span<char16_t, Extent>;
template <std::size_t Extent = dynamic_extent>
using cu16string_span [[deprecated("string_span was removed from the C++ Core Guidelines. For more "
"information, see isocpp/CppCoreGuidelines PR#1680")]] =
basic_string_span<const char16_t, Extent>;
template <std::size_t Extent = dynamic_extent>
using u32string_span [[deprecated("string_span was removed from the C++ Core Guidelines. For more "
"information, see isocpp/CppCoreGuidelines PR#1680")]] =
basic_string_span<char32_t, Extent>;
template <std::size_t Extent = dynamic_extent>
using cu32string_span [[deprecated("string_span was removed from the C++ Core Guidelines. For more "
"information, see isocpp/CppCoreGuidelines PR#1680")]] =
basic_string_span<const char32_t, Extent>;
//
// to_string() allow (explicit) conversions from string_span to string
//
template <typename CharT, std::size_t Extent>
constexpr std::basic_string<typename std::remove_const<CharT>::type>
to_string(basic_string_span<CharT, Extent> view)
{
return {view.data(), narrow_cast<std::size_t>(view.length())};
}
template <typename CharT, typename Traits = typename std::char_traits<CharT>,
typename Allocator = std::allocator<CharT>, typename gCharT, std::size_t Extent>
constexpr std::basic_string<CharT, Traits, Allocator>
to_basic_string(basic_string_span<gCharT, Extent> view)
{
return {view.data(), narrow_cast<std::size_t>(view.length())};
}
template <class ElementType, std::size_t Extent>
constexpr basic_string_span<const byte, details::calculate_byte_size<ElementType, Extent>::value>
as_bytes(basic_string_span<ElementType, Extent> s) noexcept
{
// clang-format off
GSL_SUPPRESS(type.1)
// clang-format on
return {reinterpret_cast<const byte*>(s.data()), s.size_bytes()};
}
template <class ElementType, std::size_t Extent,
class = std::enable_if_t<!std::is_const<ElementType>::value>>
constexpr basic_string_span<byte, details::calculate_byte_size<ElementType, Extent>::value>
as_writable_bytes(basic_string_span<ElementType, Extent> s) noexcept
{
// clang-format off
GSL_SUPPRESS(type.1)
// clang-format on
return {reinterpret_cast<byte*>(s.data()), s.size_bytes()};
}
// zero-terminated string span, used to convert
// zero-terminated spans to legacy strings
template <typename CharT, std::size_t Extent = dynamic_extent>
class [[deprecated("string_span was removed from the C++ Core Guidelines. For more information, "
"see isocpp/CppCoreGuidelines PR#1680")]] basic_zstring_span
{
public:
using value_type = CharT;
using const_value_type = std::add_const_t<CharT>;
using pointer = std::add_pointer_t<value_type>;
using const_pointer = std::add_pointer_t<const_value_type>;
using zstring_type = basic_zstring<value_type, Extent>;
using const_zstring_type = basic_zstring<const_value_type, Extent>;
using impl_type = span<value_type, Extent>;
using string_span_type = basic_string_span<value_type, Extent>;
constexpr basic_zstring_span(impl_type s) : span_(s)
{
// expects a zero-terminated span
Expects(s.size() > 0);
Expects(s[s.size() - 1] == value_type{});
}
// copy
constexpr basic_zstring_span(const basic_zstring_span& other) = default;
// move
constexpr basic_zstring_span(basic_zstring_span && other) = default;
// assign
constexpr basic_zstring_span& operator=(const basic_zstring_span& other) = default;
// move assign
constexpr basic_zstring_span& operator=(basic_zstring_span&& other) = default;
constexpr bool empty() const noexcept { return false; }
constexpr string_span_type as_string_span() const noexcept
{
return {span_.data(), span_.size() - 1};
}
constexpr string_span_type ensure_z() const { return gsl::ensure_z(span_); }
constexpr const_zstring_type assume_z() const noexcept { return span_.data(); }
private:
impl_type span_;
};
template <std::size_t Max = dynamic_extent>
using zstring_span [[deprecated("string_span was removed from the C++ Core Guidelines. For more "
"information, see isocpp/CppCoreGuidelines PR#1680")]] =
basic_zstring_span<char, Max>;
template <std::size_t Max = dynamic_extent>
using wzstring_span [[deprecated("string_span was removed from the C++ Core Guidelines. For more "
"information, see isocpp/CppCoreGuidelines PR#1680")]] =
basic_zstring_span<wchar_t, Max>;
template <std::size_t Max = dynamic_extent>
using u16zstring_span [[deprecated("string_span was removed from the C++ Core Guidelines. For more "
"information, see isocpp/CppCoreGuidelines PR#1680")]] =
basic_zstring_span<char16_t, Max>;
template <std::size_t Max = dynamic_extent>
using u32zstring_span [[deprecated("string_span was removed from the C++ Core Guidelines. For more "
"information, see isocpp/CppCoreGuidelines PR#1680")]] =
basic_zstring_span<char32_t, Max>;
template <std::size_t Max = dynamic_extent>
using czstring_span [[deprecated("string_span was removed from the C++ Core Guidelines. For more "
"information, see isocpp/CppCoreGuidelines PR#1680")]] =
basic_zstring_span<const char, Max>;
template <std::size_t Max = dynamic_extent>
using cwzstring_span [[deprecated("string_span was removed from the C++ Core Guidelines. For more "
"information, see isocpp/CppCoreGuidelines PR#1680")]] =
basic_zstring_span<const wchar_t, Max>;
template <std::size_t Max = dynamic_extent>
using cu16zstring_span [[deprecated("string_span was removed from the C++ Core Guidelines. For "
"more information, see isocpp/CppCoreGuidelines PR#1680")]] =
basic_zstring_span<const char16_t, Max>;
template <std::size_t Max = dynamic_extent>
using cu32zstring_span [[deprecated("string_span was removed from the C++ Core Guidelines. For "
"more information, see isocpp/CppCoreGuidelines PR#1680")]] =
basic_zstring_span<const char32_t, Max>;
// operator ==
template <class CharT, std::size_t Extent, class T,
class = std::enable_if_t<
details::is_basic_string_span<T>::value ||
std::is_convertible<T, gsl::basic_string_span<std::add_const_t<CharT>>>::value>>
bool operator==(const gsl::basic_string_span<CharT, Extent>& one, const T& other)
{
const gsl::basic_string_span<std::add_const_t<CharT>> tmp(other);
return std::equal(one.begin(), one.end(), tmp.begin(), tmp.end());
}
template <class CharT, std::size_t Extent, class T,
class = std::enable_if_t<
!details::is_basic_string_span<T>::value &&
std::is_convertible<T, gsl::basic_string_span<std::add_const_t<CharT>>>::value>>
bool operator==(const T& one, const gsl::basic_string_span<CharT, Extent>& other)
{
const gsl::basic_string_span<std::add_const_t<CharT>> tmp(one);
return std::equal(tmp.begin(), tmp.end(), other.begin(), other.end());
}
// operator !=
template <typename CharT, std::size_t Extent = dynamic_extent, typename T,
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)
{
return !(one == other);
}
template <
typename CharT, std::size_t Extent = dynamic_extent, typename T,
typename = 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>>
bool operator!=(const T& one, gsl::basic_string_span<CharT, Extent> other)
{
return !(one == other);
}
// operator<
template <typename CharT, std::size_t Extent = dynamic_extent, typename T,
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)
{
const 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::size_t Extent = dynamic_extent, typename T,
typename = 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>>
bool operator<(const T& one, gsl::basic_string_span<CharT, Extent> other)
{
gsl::basic_string_span<std::add_const_t<CharT>, Extent> tmp(one);
return std::lexicographical_compare(tmp.begin(), tmp.end(), other.begin(), other.end());
}
#ifndef _MSC_VER
// 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::size_t Extent = dynamic_extent, typename T,
typename DataType = typename T::value_type,
typename = 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>>
bool operator<(gsl::basic_string_span<CharT, Extent> one, const T& other)
{
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::size_t Extent = dynamic_extent, typename T,
typename DataType = typename T::value_type,
typename = 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>>
bool operator<(const T& one, gsl::basic_string_span<CharT, Extent> other)
{
gsl::basic_string_span<std::add_const_t<CharT>, Extent> tmp(one);
return std::lexicographical_compare(tmp.begin(), tmp.end(), other.begin(), other.end());
}
#endif
// operator <=
template <typename CharT, std::size_t Extent = dynamic_extent, typename T,
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)
{
return !(other < one);
}
template <
typename CharT, std::size_t Extent = dynamic_extent, typename T,
typename = 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>>
bool operator<=(const T& one, gsl::basic_string_span<CharT, Extent> other)
{
return !(other < one);
}
#ifndef _MSC_VER
// 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::size_t Extent = dynamic_extent, typename T,
typename DataType = typename T::value_type,
typename = 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>>
bool operator<=(gsl::basic_string_span<CharT, Extent> one, const T& other)
{
return !(other < one);
}
template <
typename CharT, std::size_t Extent = dynamic_extent, typename T,
typename DataType = typename T::value_type,
typename = 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>>
bool operator<=(const T& one, gsl::basic_string_span<CharT, Extent> other)
{
return !(other < one);
}
#endif
// operator>
template <typename CharT, std::size_t Extent = dynamic_extent, typename T,
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)
{
return other < one;
}
template <
typename CharT, std::size_t Extent = dynamic_extent, typename T,
typename = 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>>
bool operator>(const T& one, gsl::basic_string_span<CharT, Extent> other)
{
return other < one;
}
#ifndef _MSC_VER
// 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::size_t Extent = dynamic_extent, typename T,
typename DataType = typename T::value_type,
typename = 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>>
bool operator>(gsl::basic_string_span<CharT, Extent> one, const T& other)
{
return other < one;
}
template <
typename CharT, std::size_t Extent = dynamic_extent, typename T,
typename DataType = typename T::value_type,
typename = 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>>
bool operator>(const T& one, gsl::basic_string_span<CharT, Extent> other)
{
return other < one;
}
#endif
// operator >=
template <typename CharT, std::size_t Extent = dynamic_extent, typename T,
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)
{
return !(one < other);
}
template <
typename CharT, std::size_t Extent = dynamic_extent, typename T,
typename = 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>>
bool operator>=(const T& one, gsl::basic_string_span<CharT, Extent> other)
{
return !(one < other);
}
#ifndef _MSC_VER
// 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::size_t Extent = dynamic_extent, typename T,
typename DataType = typename T::value_type,
typename = 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>>
bool operator>=(gsl::basic_string_span<CharT, Extent> one, const T& other)
{
return !(one < other);
}
template <
typename CharT, std::size_t Extent = dynamic_extent, typename T,
typename DataType = typename T::value_type,
typename = 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>>
bool operator>=(const T& one, gsl::basic_string_span<CharT, Extent> other)
{
return !(one < other);
}
#endif
} // namespace gsl
#if defined(_MSC_VER) && !defined(__clang__)
#pragma warning(pop)
#endif // _MSC_VER
#if defined(__GNUC__) || defined(__clang__)
#pragma GCC diagnostic pop
#endif
#endif // GSL_STRING_SPAN_H

160
3rdparty/include/gsl/util vendored
View File

@ -1,160 +0,0 @@
///////////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2015 Microsoft Corporation. All rights reserved.
//
// This code is licensed under the MIT License (MIT).
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//
///////////////////////////////////////////////////////////////////////////////
#ifndef GSL_UTIL_H
#define GSL_UTIL_H
#include <gsl/assert> // for Expects
#include <array>
#include <cstddef> // for ptrdiff_t, size_t
#include <initializer_list> // for initializer_list
#include <type_traits> // for is_signed, integral_constant
#include <utility> // for exchange, forward
#if defined(__has_include) && __has_include(<version>)
#include <version>
#if defined(__cpp_lib_span) && __cpp_lib_span >= 202002L
#include <span>
#endif // __cpp_lib_span >= 202002L
#endif //__has_include(<version>)
#if defined(_MSC_VER) && !defined(__clang__)
#pragma warning(push)
#pragma warning(disable : 4127) // conditional expression is constant
#endif // _MSC_VER
#if defined(__cplusplus) && (__cplusplus >= 201703L)
#define GSL_NODISCARD [[nodiscard]]
#else
#define GSL_NODISCARD
#endif // defined(__cplusplus) && (__cplusplus >= 201703L)
namespace gsl
{
//
// GSL.util: utilities
//
// index type for all container indexes/subscripts/sizes
using index = std::ptrdiff_t;
// final_action allows you to ensure something gets run at the end of a scope
template <class F>
class final_action
{
public:
static_assert(!std::is_reference<F>::value && !std::is_const<F>::value &&
!std::is_volatile<F>::value,
"Final_action should store its callable by value");
explicit final_action(F f) noexcept : f_(std::move(f)) {}
final_action(final_action&& other) noexcept
: f_(std::move(other.f_)), invoke_(std::exchange(other.invoke_, false))
{}
final_action(const final_action&) = delete;
final_action& operator=(const final_action&) = delete;
final_action& operator=(final_action&&) = delete;
// clang-format off
GSL_SUPPRESS(f.6) // NO-FORMAT: attribute // terminate if throws
// clang-format on
~final_action() noexcept
{
if (invoke_) f_();
}
private:
F f_;
bool invoke_{true};
};
// finally() - convenience function to generate a final_action
template <class F>
GSL_NODISCARD final_action<typename std::remove_cv<typename std::remove_reference<F>::type>::type>
finally(F&& f) noexcept
{
return final_action<typename std::remove_cv<typename std::remove_reference<F>::type>::type>(
std::forward<F>(f));
}
// narrow_cast(): a searchable way to do narrowing casts of values
template <class T, class U>
// clang-format off
GSL_SUPPRESS(type.1) // NO-FORMAT: attribute
// clang-format on
constexpr T narrow_cast(U&& u) noexcept
{
return static_cast<T>(std::forward<U>(u));
}
//
// at() - Bounds-checked way of accessing builtin arrays, std::array, std::vector
//
template <class T, std::size_t N>
// clang-format off
GSL_SUPPRESS(bounds.4) // NO-FORMAT: attribute
GSL_SUPPRESS(bounds.2) // NO-FORMAT: attribute
// clang-format on
constexpr T& at(T (&arr)[N], const index i)
{
Expects(i >= 0 && i < narrow_cast<index>(N));
return arr[narrow_cast<std::size_t>(i)];
}
template <class Cont>
// clang-format off
GSL_SUPPRESS(bounds.4) // NO-FORMAT: attribute
GSL_SUPPRESS(bounds.2) // NO-FORMAT: attribute
// clang-format on
constexpr auto at(Cont& cont, const index i) -> decltype(cont[cont.size()])
{
Expects(i >= 0 && i < narrow_cast<index>(cont.size()));
using size_type = decltype(cont.size());
return cont[narrow_cast<size_type>(i)];
}
template <class T>
// clang-format off
GSL_SUPPRESS(bounds.1) // NO-FORMAT: attribute
// clang-format on
constexpr T at(const std::initializer_list<T> cont, const index i)
{
Expects(i >= 0 && i < narrow_cast<index>(cont.size()));
return *(cont.begin() + i);
}
#if defined(__cpp_lib_span) && __cpp_lib_span >= 202002L
template <class T, size_t extent = std::dynamic_extent>
constexpr auto at(std::span<T, extent> sp, const index i) -> decltype(sp[sp.size()])
{
Expects(i >= 0 && i < narrow_cast<index>(sp.size()));
return sp[gsl::narrow_cast<size_t>(i)];
}
#endif // __cpp_lib_span >= 202002L
} // namespace gsl
#if defined(_MSC_VER) && !defined(__clang__)
#pragma warning(pop)
#endif // _MSC_VER
#endif // GSL_UTIL_H

2
pcsx2/GS/Renderers/OpenGL/GLContextEGL.cpp
View File

@ -44,7 +44,7 @@ std::unique_ptr<GLContext> GLContextEGL::Create(const WindowInfo& wi, std::span<
return context;
}
bool GLContextEGL::Initialize(gsl::span<const Version> versions_to_try)
bool GLContextEGL::Initialize(std::span<const Version> versions_to_try)
{
if (!gladLoadEGL())
{

2
pcsx2/GS/Renderers/OpenGL/GLContextEGL.h
View File

@ -42,7 +42,7 @@ protected:
virtual bool SetDisplay();
virtual EGLNativeWindowType GetNativeWindow(EGLConfig config);
bool Initialize(gsl::span<const Version> versions_to_try);
bool Initialize(std::span<const Version> versions_to_try);
bool CreateDisplay();
bool CreateContext(const Version& version, EGLContext share_context);
bool CreateContextAndSurface(const Version& version, EGLContext share_context, bool make_current);