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Implement free-standing (c|r|cr)(begin|end) and ssize functions

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Martijn Otto 2019-11-14 13:13:19 +01:00
parent 0fefba89da
commit b186b6cc68
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1 changed files with 56 additions and 0 deletions
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56
include/gsl/span
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@ -774,6 +774,62 @@ constexpr ElementType& at(span<ElementType, Extent> s, index i)
return s[i];
}
// [span.obs] Free observer functions
template <class ElementType, std::ptrdiff_t Extent>
constexpr typename span<ElementType, Extent>::index_type ssize(const span<ElementType, Extent> &span) noexcept
{
return span.size();
}
// [span.iter] Free functions for begin/end functions
template <class ElementType, std::ptrdiff_t Extent>
constexpr typename span<ElementType, Extent>::iterator begin(const span<ElementType, Extent> &span) noexcept
{
return span.begin();
}
template <class ElementType, std::ptrdiff_t Extent = dynamic_extent>
constexpr typename span<ElementType, Extent>::iterator end(const span<ElementType, Extent> &span) noexcept
{
return span.end();
}
template <class ElementType, std::ptrdiff_t Extent>
constexpr typename span<ElementType, Extent>::const_iterator cbegin(const span<ElementType, Extent> &span) noexcept
{
return span.cbegin();
}
template <class ElementType, std::ptrdiff_t Extent>
constexpr typename span<ElementType, Extent>::const_iterator cend(const span<ElementType, Extent> &span) noexcept
{
return span.cend();
}
template <class ElementType, std::ptrdiff_t Extent>
constexpr typename span<ElementType, Extent>::reverse_iterator rbegin(const span<ElementType, Extent> &span) noexcept
{
return span.rbegin();
}
template <class ElementType, std::ptrdiff_t Extent>
constexpr typename span<ElementType, Extent>::reverse_iterator rend(const span<ElementType, Extent> &span) noexcept
{
return span.rend();
}
template <class ElementType, std::ptrdiff_t Extent>
constexpr typename span<ElementType, Extent>::const_reverse_iterator crbegin(const span<ElementType, Extent> &span) noexcept
{
return span.crbegin();
}
template <class ElementType, std::ptrdiff_t Extent>
constexpr typename span<ElementType, Extent>::const_reverse_iterator crend(const span<ElementType, Extent> &span) noexcept
{
return span.crend();
}
} // namespace gsl
#if defined(_MSC_VER) && !defined(__clang__)