mirror of
https://github.com/microsoft/GSL.git
synced 2025-05-12 17:05:20 -04:00
change span from signed to unsigned to align to std
This commit is contained in:
Jordan Maples [MSFT]
@ -23,7 +23,7 @@
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#include <algorithm> // for equal, lexicographical_compare
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#include <array> // for array
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#include <cstddef> // for ptrdiff_t, size_t, nullptr_t
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#include <cstddef> // for size_t, nullptr_t
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#include <cstdint> // for PTRDIFF_MAX
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#include <cstring>
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#include <string> // for basic_string, allocator, char_traits
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@ -56,43 +56,43 @@ namespace gsl
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// (sometimes needlessly) break existing programs when introduced.
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//
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template <typename CharT, std::ptrdiff_t Extent = dynamic_extent>
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template <typename CharT, std::size_t Extent = dynamic_extent>
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using basic_zstring = CharT*;
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template <std::ptrdiff_t Extent = dynamic_extent>
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template <std::size_t Extent = dynamic_extent>
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using czstring = basic_zstring<const char, Extent>;
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template <std::ptrdiff_t Extent = dynamic_extent>
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template <std::size_t Extent = dynamic_extent>
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using cwzstring = basic_zstring<const wchar_t, Extent>;
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template <std::ptrdiff_t Extent = dynamic_extent>
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template <std::size_t Extent = dynamic_extent>
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using cu16zstring = basic_zstring<const char16_t, Extent>;
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template <std::ptrdiff_t Extent = dynamic_extent>
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template <std::size_t Extent = dynamic_extent>
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using cu32zstring = basic_zstring<const char32_t, Extent>;
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template <std::ptrdiff_t Extent = dynamic_extent>
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template <std::size_t Extent = dynamic_extent>
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using zstring = basic_zstring<char, Extent>;
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template <std::ptrdiff_t Extent = dynamic_extent>
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template <std::size_t Extent = dynamic_extent>
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using wzstring = basic_zstring<wchar_t, Extent>;
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template <std::ptrdiff_t Extent = dynamic_extent>
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template <std::size_t Extent = dynamic_extent>
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using u16zstring = basic_zstring<char16_t, Extent>;
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template <std::ptrdiff_t Extent = dynamic_extent>
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template <std::size_t Extent = dynamic_extent>
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using u32zstring = basic_zstring<char32_t, Extent>;
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namespace details
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{
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template <class CharT>
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std::ptrdiff_t string_length(const CharT* str, std::ptrdiff_t n)
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std::size_t string_length(const CharT* str, std::size_t n)
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{
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if (str == nullptr || n <= 0) return 0;
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if (str == nullptr || n == dynamic_extent) return 0;
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const span<const CharT> str_span{str, n};
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std::ptrdiff_t len = 0;
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std::size_t len = 0;
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while (len < n && str_span[len]) len++;
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return len;
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@ -108,18 +108,20 @@ namespace details
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// Will fail-fast if sentinel cannot be found before max elements are examined.
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//
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template <typename T, const T Sentinel>
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span<T, dynamic_extent> ensure_sentinel(T* seq, std::ptrdiff_t max = PTRDIFF_MAX)
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span<T, dynamic_extent> ensure_sentinel(T* seq,
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std::size_t max = std::numeric_limits<std::size_t>::max())
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{
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Ensures(seq != nullptr);
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GSL_SUPPRESS(f.23) // NO-FORMAT: attribute // TODO: false positive // TODO: suppress does not work
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GSL_SUPPRESS(
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f .23) // NO-FORMAT: attribute // TODO: false positive // TODO: suppress does not work
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auto cur = seq;
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Ensures(cur != nullptr); // workaround for removing the warning
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GSL_SUPPRESS(bounds.1) // NO-FORMAT: attribute // TODO: suppress does not work
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while ((cur - seq) < max && *cur != Sentinel) ++cur;
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GSL_SUPPRESS(bounds .1) // NO-FORMAT: attribute // TODO: suppress does not work
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while (static_cast<std::size_t>(cur - seq) < max && *cur != Sentinel) ++cur;
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Ensures(*cur == Sentinel);
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return {seq, cur - seq};
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return {seq, static_cast<std::size_t>(cur - seq)};
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}
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//
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@ -128,7 +130,8 @@ span<T, dynamic_extent> ensure_sentinel(T* seq, std::ptrdiff_t max = PTRDIFF_MAX
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// the limit of size_type.
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//
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template <typename CharT>
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span<CharT, dynamic_extent> ensure_z(CharT* const& sz, std::ptrdiff_t max = PTRDIFF_MAX)
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span<CharT, dynamic_extent> ensure_z(CharT* const& sz,
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std::size_t max = std::numeric_limits<std::size_t>::max())
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{
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return ensure_sentinel<CharT, CharT(0)>(sz, max);
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}
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@ -136,26 +139,27 @@ span<CharT, dynamic_extent> ensure_z(CharT* const& sz, std::ptrdiff_t max = PTRD
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template <typename CharT, std::size_t N>
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span<CharT, dynamic_extent> ensure_z(CharT (&sz)[N])
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{
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return ensure_z(&sz[0], narrow_cast<std::ptrdiff_t>(N));
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return ensure_z(&sz[0], N);
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}
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template <class Cont>
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span<typename std::remove_pointer<typename Cont::pointer>::type, dynamic_extent>
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ensure_z(Cont& cont)
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{
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return ensure_z(cont.data(), narrow_cast<std::ptrdiff_t>(cont.size()));
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return ensure_z(cont.data(), cont.size());
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}
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template <typename CharT, std::ptrdiff_t>
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template <typename CharT, std::size_t>
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class basic_string_span;
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namespace details {
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namespace details
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{
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template <typename T>
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struct is_basic_string_span_oracle : std::false_type
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{
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};
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template <typename CharT, std::ptrdiff_t Extent>
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template <typename CharT, std::size_t Extent>
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struct is_basic_string_span_oracle<basic_string_span<CharT, Extent>> : std::true_type
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{
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};
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@ -169,7 +173,7 @@ namespace details {
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//
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// string_span and relatives
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//
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template <typename CharT, std::ptrdiff_t Extent = dynamic_extent>
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template <typename CharT, std::size_t Extent = dynamic_extent>
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class basic_string_span
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{
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public:
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@ -218,7 +222,7 @@ public:
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template <class Traits, class Allocator>
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// GSL_SUPPRESS(bounds.4) // NO-FORMAT: attribute // TODO: parser bug
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constexpr basic_string_span(std::basic_string<element_type, Traits, Allocator>& str)
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: span_(&str[0], narrow_cast<std::ptrdiff_t>(str.length()))
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: span_(&str[0], str.length())
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{}
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template <class Traits, class Allocator>
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@ -247,7 +251,7 @@ public:
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// from string_span
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template <
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class OtherValueType, std::ptrdiff_t OtherExtent,
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class OtherValueType, std::size_t OtherExtent,
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class = std::enable_if_t<std::is_convertible<
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typename basic_string_span<OtherValueType, OtherExtent>::impl_type, impl_type>::value>>
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constexpr basic_string_span(basic_string_span<OtherValueType, OtherExtent> other)
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@ -312,7 +316,7 @@ public:
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constexpr const_reverse_iterator crend() const noexcept { return span_.crend(); }
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private:
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static impl_type remove_z(pointer const& sz, std::ptrdiff_t max)
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static impl_type remove_z(pointer const& sz, std::size_t max)
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{
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return {sz, details::string_length(sz, max)};
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}
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@ -320,41 +324,41 @@ private:
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template <std::size_t N>
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static impl_type remove_z(element_type (&sz)[N])
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{
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return remove_z(&sz[0], narrow_cast<std::ptrdiff_t>(N));
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return remove_z(&sz[0], N);
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}
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impl_type span_;
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};
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template <std::ptrdiff_t Extent = dynamic_extent>
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template <std::size_t Extent = dynamic_extent>
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using string_span = basic_string_span<char, Extent>;
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template <std::ptrdiff_t Extent = dynamic_extent>
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template <std::size_t Extent = dynamic_extent>
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using cstring_span = basic_string_span<const char, Extent>;
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template <std::ptrdiff_t Extent = dynamic_extent>
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template <std::size_t Extent = dynamic_extent>
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using wstring_span = basic_string_span<wchar_t, Extent>;
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template <std::ptrdiff_t Extent = dynamic_extent>
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template <std::size_t Extent = dynamic_extent>
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using cwstring_span = basic_string_span<const wchar_t, Extent>;
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template <std::ptrdiff_t Extent = dynamic_extent>
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template <std::size_t Extent = dynamic_extent>
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using u16string_span = basic_string_span<char16_t, Extent>;
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template <std::ptrdiff_t Extent = dynamic_extent>
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template <std::size_t Extent = dynamic_extent>
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using cu16string_span = basic_string_span<const char16_t, Extent>;
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template <std::ptrdiff_t Extent = dynamic_extent>
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template <std::size_t Extent = dynamic_extent>
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using u32string_span = basic_string_span<char32_t, Extent>;
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template <std::ptrdiff_t Extent = dynamic_extent>
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template <std::size_t Extent = dynamic_extent>
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using cu32string_span = basic_string_span<const char32_t, Extent>;
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//
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// to_string() allow (explicit) conversions from string_span to string
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//
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template <typename CharT, std::ptrdiff_t Extent>
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template <typename CharT, std::size_t Extent>
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std::basic_string<typename std::remove_const<CharT>::type>
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to_string(basic_string_span<CharT, Extent> view)
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{
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@ -362,33 +366,34 @@ to_string(basic_string_span<CharT, Extent> view)
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}
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template <typename CharT, typename Traits = typename std::char_traits<CharT>,
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typename Allocator = std::allocator<CharT>, typename gCharT, std::ptrdiff_t Extent>
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typename Allocator = std::allocator<CharT>, typename gCharT, std::size_t Extent>
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std::basic_string<CharT, Traits, Allocator> to_basic_string(basic_string_span<gCharT, Extent> view)
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{
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return {view.data(), narrow_cast<std::size_t>(view.length())};
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}
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template <class ElementType, std::ptrdiff_t Extent>
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template <class ElementType, std::size_t Extent>
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basic_string_span<const byte, details::calculate_byte_size<ElementType, Extent>::value>
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as_bytes(basic_string_span<ElementType, Extent> s) noexcept
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{
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GSL_SUPPRESS(type.1) // NO-FORMAT: attribute
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GSL_SUPPRESS(type .1) // NO-FORMAT: attribute
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return {reinterpret_cast<const byte*>(s.data()), s.size_bytes()};
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}
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template <class ElementType, std::ptrdiff_t Extent,
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template <class ElementType, std::size_t Extent,
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class = std::enable_if_t<!std::is_const<ElementType>::value>>
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basic_string_span<byte, details::calculate_byte_size<ElementType, Extent>::value>
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as_writeable_bytes(basic_string_span<ElementType, Extent> s) noexcept
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{
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GSL_SUPPRESS(type.1) // NO-FORMAT: attribute
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GSL_SUPPRESS(type .1) // NO-FORMAT: attribute
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return {reinterpret_cast<byte*>(s.data()), s.size_bytes()};
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}
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// zero-terminated string span, used to convert
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// zero-terminated spans to legacy strings
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template <typename CharT, std::ptrdiff_t Extent = dynamic_extent>
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class basic_zstring_span {
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template <typename CharT, std::size_t Extent = dynamic_extent>
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class basic_zstring_span
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{
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public:
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using value_type = CharT;
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using const_value_type = std::add_const_t<CharT>;
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@ -435,32 +440,32 @@ private:
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impl_type span_;
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};
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template <std::ptrdiff_t Max = dynamic_extent>
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template <std::size_t Max = dynamic_extent>
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using zstring_span = basic_zstring_span<char, Max>;
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template <std::ptrdiff_t Max = dynamic_extent>
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template <std::size_t Max = dynamic_extent>
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using wzstring_span = basic_zstring_span<wchar_t, Max>;
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template <std::ptrdiff_t Max = dynamic_extent>
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template <std::size_t Max = dynamic_extent>
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using u16zstring_span = basic_zstring_span<char16_t, Max>;
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template <std::ptrdiff_t Max = dynamic_extent>
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template <std::size_t Max = dynamic_extent>
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using u32zstring_span = basic_zstring_span<char32_t, Max>;
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template <std::ptrdiff_t Max = dynamic_extent>
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template <std::size_t Max = dynamic_extent>
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using czstring_span = basic_zstring_span<const char, Max>;
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template <std::ptrdiff_t Max = dynamic_extent>
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template <std::size_t Max = dynamic_extent>
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using cwzstring_span = basic_zstring_span<const wchar_t, Max>;
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template <std::ptrdiff_t Max = dynamic_extent>
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template <std::size_t Max = dynamic_extent>
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using cu16zstring_span = basic_zstring_span<const char16_t, Max>;
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template <std::ptrdiff_t Max = dynamic_extent>
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template <std::size_t Max = dynamic_extent>
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using cu32zstring_span = basic_zstring_span<const char32_t, Max>;
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// operator ==
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template <class CharT, std::ptrdiff_t Extent, class T,
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template <class CharT, std::size_t Extent, class T,
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class = std::enable_if_t<
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details::is_basic_string_span<T>::value ||
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std::is_convertible<T, gsl::basic_string_span<std::add_const_t<CharT>>>::value>>
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@ -470,7 +475,7 @@ bool operator==(const gsl::basic_string_span<CharT, Extent>& one, const T& other
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return std::equal(one.begin(), one.end(), tmp.begin(), tmp.end());
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}
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template <class CharT, std::ptrdiff_t Extent, class T,
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template <class CharT, std::size_t Extent, class T,
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class = std::enable_if_t<
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!details::is_basic_string_span<T>::value &&
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std::is_convertible<T, gsl::basic_string_span<std::add_const_t<CharT>>>::value>>
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@ -481,7 +486,7 @@ bool operator==(const T& one, const gsl::basic_string_span<CharT, Extent>& other
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}
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// operator !=
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template <typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
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template <typename CharT, std::size_t Extent = gsl::dynamic_extent, typename T,
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typename = std::enable_if_t<std::is_convertible<
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T, gsl::basic_string_span<std::add_const_t<CharT>, Extent>>::value>>
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bool operator!=(gsl::basic_string_span<CharT, Extent> one, const T& other)
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@ -490,7 +495,7 @@ bool operator!=(gsl::basic_string_span<CharT, Extent> one, const T& other)
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}
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template <
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typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
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typename CharT, std::size_t Extent = gsl::dynamic_extent, typename T,
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typename = std::enable_if_t<
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std::is_convertible<T, gsl::basic_string_span<std::add_const_t<CharT>, Extent>>::value &&
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!gsl::details::is_basic_string_span<T>::value>>
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@ -500,7 +505,7 @@ bool operator!=(const T& one, gsl::basic_string_span<CharT, Extent> other)
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}
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// operator<
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template <typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
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template <typename CharT, std::size_t Extent = gsl::dynamic_extent, typename T,
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typename = std::enable_if_t<std::is_convertible<
|
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T, gsl::basic_string_span<std::add_const_t<CharT>, Extent>>::value>>
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bool operator<(gsl::basic_string_span<CharT, Extent> one, const T& other)
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@ -510,7 +515,7 @@ bool operator<(gsl::basic_string_span<CharT, Extent> one, const T& other)
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}
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template <
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typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
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typename CharT, std::size_t Extent = gsl::dynamic_extent, typename T,
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typename = std::enable_if_t<
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std::is_convertible<T, gsl::basic_string_span<std::add_const_t<CharT>, Extent>>::value &&
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!gsl::details::is_basic_string_span<T>::value>>
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@ -526,7 +531,7 @@ bool operator<(const T& one, gsl::basic_string_span<CharT, Extent> other)
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// so the cases below are already covered by the previous operators
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template <
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typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
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typename CharT, std::size_t Extent = gsl::dynamic_extent, typename T,
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typename DataType = typename T::value_type,
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typename = std::enable_if_t<
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!gsl::details::is_span<T>::value && !gsl::details::is_basic_string_span<T>::value &&
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@ -540,7 +545,7 @@ bool operator<(gsl::basic_string_span<CharT, Extent> one, const T& other)
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}
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template <
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typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
|
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typename CharT, std::size_t Extent = gsl::dynamic_extent, typename T,
|
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typename DataType = typename T::value_type,
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typename = std::enable_if_t<
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!gsl::details::is_span<T>::value && !gsl::details::is_basic_string_span<T>::value &&
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@ -555,7 +560,7 @@ bool operator<(const T& one, gsl::basic_string_span<CharT, Extent> other)
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#endif
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// operator <=
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template <typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
|
||||
template <typename CharT, std::size_t Extent = gsl::dynamic_extent, typename T,
|
||||
typename = std::enable_if_t<std::is_convertible<
|
||||
T, gsl::basic_string_span<std::add_const_t<CharT>, Extent>>::value>>
|
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bool operator<=(gsl::basic_string_span<CharT, Extent> one, const T& other)
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@ -564,7 +569,7 @@ bool operator<=(gsl::basic_string_span<CharT, Extent> one, const T& other)
|
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}
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template <
|
||||
typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
|
||||
typename CharT, std::size_t Extent = gsl::dynamic_extent, typename T,
|
||||
typename = std::enable_if_t<
|
||||
std::is_convertible<T, gsl::basic_string_span<std::add_const_t<CharT>, Extent>>::value &&
|
||||
!gsl::details::is_basic_string_span<T>::value>>
|
||||
@ -579,7 +584,7 @@ bool operator<=(const T& one, gsl::basic_string_span<CharT, Extent> other)
|
||||
// so the cases below are already covered by the previous operators
|
||||
|
||||
template <
|
||||
typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
|
||||
typename CharT, std::size_t Extent = gsl::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 &&
|
||||
@ -592,7 +597,7 @@ bool operator<=(gsl::basic_string_span<CharT, Extent> one, const T& other)
|
||||
}
|
||||
|
||||
template <
|
||||
typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
|
||||
typename CharT, std::size_t Extent = gsl::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 &&
|
||||
@ -606,7 +611,7 @@ bool operator<=(const T& one, gsl::basic_string_span<CharT, Extent> other)
|
||||
#endif
|
||||
|
||||
// operator>
|
||||
template <typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
|
||||
template <typename CharT, std::size_t Extent = gsl::dynamic_extent, typename T,
|
||||
typename = std::enable_if_t<std::is_convertible<
|
||||
T, gsl::basic_string_span<std::add_const_t<CharT>, Extent>>::value>>
|
||||
bool operator>(gsl::basic_string_span<CharT, Extent> one, const T& other)
|
||||
@ -615,7 +620,7 @@ bool operator>(gsl::basic_string_span<CharT, Extent> one, const T& other)
|
||||
}
|
||||
|
||||
template <
|
||||
typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
|
||||
typename CharT, std::size_t Extent = gsl::dynamic_extent, typename T,
|
||||
typename = std::enable_if_t<
|
||||
std::is_convertible<T, gsl::basic_string_span<std::add_const_t<CharT>, Extent>>::value &&
|
||||
!gsl::details::is_basic_string_span<T>::value>>
|
||||
@ -630,7 +635,7 @@ bool operator>(const T& one, gsl::basic_string_span<CharT, Extent> other)
|
||||
// so the cases below are already covered by the previous operators
|
||||
|
||||
template <
|
||||
typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
|
||||
typename CharT, std::size_t Extent = gsl::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 &&
|
||||
@ -643,7 +648,7 @@ bool operator>(gsl::basic_string_span<CharT, Extent> one, const T& other)
|
||||
}
|
||||
|
||||
template <
|
||||
typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
|
||||
typename CharT, std::size_t Extent = gsl::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 &&
|
||||
@ -657,7 +662,7 @@ bool operator>(const T& one, gsl::basic_string_span<CharT, Extent> other)
|
||||
#endif
|
||||
|
||||
// operator >=
|
||||
template <typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
|
||||
template <typename CharT, std::size_t Extent = gsl::dynamic_extent, typename T,
|
||||
typename = std::enable_if_t<std::is_convertible<
|
||||
T, gsl::basic_string_span<std::add_const_t<CharT>, Extent>>::value>>
|
||||
bool operator>=(gsl::basic_string_span<CharT, Extent> one, const T& other)
|
||||
@ -666,7 +671,7 @@ bool operator>=(gsl::basic_string_span<CharT, Extent> one, const T& other)
|
||||
}
|
||||
|
||||
template <
|
||||
typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
|
||||
typename CharT, std::size_t Extent = gsl::dynamic_extent, typename T,
|
||||
typename = std::enable_if_t<
|
||||
std::is_convertible<T, gsl::basic_string_span<std::add_const_t<CharT>, Extent>>::value &&
|
||||
!gsl::details::is_basic_string_span<T>::value>>
|
||||
@ -681,7 +686,7 @@ bool operator>=(const T& one, gsl::basic_string_span<CharT, Extent> other)
|
||||
// so the cases below are already covered by the previous operators
|
||||
|
||||
template <
|
||||
typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
|
||||
typename CharT, std::size_t Extent = gsl::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 &&
|
||||
@ -694,7 +699,7 @@ bool operator>=(gsl::basic_string_span<CharT, Extent> one, const T& other)
|
||||
}
|
||||
|
||||
template <
|
||||
typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
|
||||
typename CharT, std::size_t Extent = gsl::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 &&
|
||||
|
||||
Reference in New Issue
Block a user