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Fix string view compat for VS 2013.
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@grafikrobot
grafikrobot committed Aug 20, 2023
1 parent 31ff4df commit 66b93e4
Showing 1 changed file with 263 additions and 0 deletions.
263 changes: 263 additions & 0 deletions src/engine/strview.h
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Original file line number Diff line number Diff line change
Expand Up @@ -26,10 +26,21 @@
#include <type_traits>
#include <cassert>

// RFRM: -begin- Hardwire C++11
#define BOOST_CXX14_CONSTEXPR
#define BOOST_NOEXCEPT
#if (defined(_MSC_FULL_VER) && _MSC_FULL_VER < 190024210)
#define BOOST_NO_CXX11_CONSTEXPR
#endif
#if defined(BOOST_NO_CXX11_CONSTEXPR)
#define BOOST_CONSTEXPR
#else
#define BOOST_CONSTEXPR constexpr
#endif
#define BOOST_STATIC_CONSTEXPR static const
#define BOOST_NO_CXX17_HDR_STRING_VIEW
#define BOOST_NO_CXX20_HDR_CONCEPTS
// RFRM: -end- Hardwire C++11

namespace boost
{
Expand Down Expand Up @@ -379,8 +390,30 @@ template<class Ch> class basic_string_view
{
}

#if !defined(BOOST_NO_CXX17_HDR_STRING_VIEW)

basic_string_view( std::basic_string_view<Ch, std::char_traits<Ch> > const& str ) BOOST_NOEXCEPT: p_( str.data() ), n_( str.size() )
{
}

#endif

#if !defined(BOOST_NO_CXX11_NULLPTR)
# if !defined(BOOST_NO_CXX11_DELETED_FUNCTIONS)

basic_string_view( std::nullptr_t ) = delete;

# else

private:

basic_string_view( std::nullptr_t );

public:

# endif
#endif

// BOOST_CONSTEXPR basic_string_view& operator=( basic_string_view const& ) BOOST_NOEXCEPT & = default;

// conversions
Expand All @@ -390,6 +423,16 @@ template<class Ch> class basic_string_view
return std::basic_string<Ch, std::char_traits<Ch>, A>( data(), size() );
}

#if !defined(BOOST_NO_CXX17_HDR_STRING_VIEW)

template<class Ch2, class En = typename boost::enable_if<boost::core::detail::is_same<Ch2, Ch> >::type>
operator std::basic_string_view<Ch2>() const BOOST_NOEXCEPT
{
return std::basic_string_view<Ch>( data(), size() );
}

#endif

// iterator support

BOOST_CONSTEXPR const_iterator begin() const BOOST_NOEXCEPT
Expand Down Expand Up @@ -937,6 +980,195 @@ template<class Ch> class basic_string_view
}

#if !defined(BOOST_NO_CXX17_HDR_STRING_VIEW)

// "sufficient number of additional overloads"

// against std::string_view

BOOST_CXX14_CONSTEXPR friend bool operator==( basic_string_view sv1, std::basic_string_view<Ch> sv2 ) BOOST_NOEXCEPT
{
return sv1.size() == sv2.size() && traits_type::compare( sv1.data(), sv2.data(), sv1.size() ) == 0;
}

BOOST_CXX14_CONSTEXPR friend bool operator==( std::basic_string_view<Ch> sv1, basic_string_view sv2 ) BOOST_NOEXCEPT
{
return sv1.size() == sv2.size() && traits_type::compare( sv1.data(), sv2.data(), sv1.size() ) == 0;
}

BOOST_CXX14_CONSTEXPR friend bool operator!=( basic_string_view sv1, std::basic_string_view<Ch> sv2 ) BOOST_NOEXCEPT
{
return !( sv1 == sv2 );
}

BOOST_CXX14_CONSTEXPR friend bool operator!=( std::basic_string_view<Ch> sv1, basic_string_view sv2 ) BOOST_NOEXCEPT
{
return !( sv1 == sv2 );
}

BOOST_CXX14_CONSTEXPR friend bool operator<( basic_string_view sv1, std::basic_string_view<Ch> sv2 ) BOOST_NOEXCEPT
{
return sv1.compare( sv2 ) < 0;
}

BOOST_CXX14_CONSTEXPR friend bool operator<( std::basic_string_view<Ch> sv1, basic_string_view sv2 ) BOOST_NOEXCEPT
{
return sv1.compare( sv2 ) < 0;
}

BOOST_CXX14_CONSTEXPR friend bool operator<=( basic_string_view sv1, std::basic_string_view<Ch> sv2 ) BOOST_NOEXCEPT
{
return sv1.compare( sv2 ) <= 0;
}

BOOST_CXX14_CONSTEXPR friend bool operator<=( std::basic_string_view<Ch> sv1, basic_string_view sv2 ) BOOST_NOEXCEPT
{
return sv1.compare( sv2 ) <= 0;
}

BOOST_CXX14_CONSTEXPR friend bool operator>( basic_string_view sv1, std::basic_string_view<Ch> sv2 ) BOOST_NOEXCEPT
{
return sv1.compare( sv2 ) > 0;
}

BOOST_CXX14_CONSTEXPR friend bool operator>( std::basic_string_view<Ch> sv1, basic_string_view sv2 ) BOOST_NOEXCEPT
{
return sv1.compare( sv2 ) > 0;
}

BOOST_CXX14_CONSTEXPR friend bool operator>=( basic_string_view sv1, std::basic_string_view<Ch> sv2 ) BOOST_NOEXCEPT
{
return sv1.compare( sv2 ) >= 0;
}

BOOST_CXX14_CONSTEXPR friend bool operator>=( std::basic_string_view<Ch> sv1, basic_string_view sv2 ) BOOST_NOEXCEPT
{
return sv1.compare( sv2 ) >= 0;
}

// against Ch const*

BOOST_CXX14_CONSTEXPR friend bool operator==( basic_string_view sv1, Ch const* sv2 ) BOOST_NOEXCEPT
{
return sv1 == basic_string_view( sv2 );
}

BOOST_CXX14_CONSTEXPR friend bool operator==( Ch const* sv1, basic_string_view sv2 ) BOOST_NOEXCEPT
{
return basic_string_view( sv1 ) == sv2;
}

BOOST_CXX14_CONSTEXPR friend bool operator!=( basic_string_view sv1, Ch const* sv2 ) BOOST_NOEXCEPT
{
return !( sv1 == sv2 );
}

BOOST_CXX14_CONSTEXPR friend bool operator!=( Ch const* sv1, basic_string_view sv2 ) BOOST_NOEXCEPT
{
return !( sv1 == sv2 );
}

BOOST_CXX14_CONSTEXPR friend bool operator<( basic_string_view sv1, Ch const* sv2 ) BOOST_NOEXCEPT
{
return sv1.compare( sv2 ) < 0;
}

BOOST_CXX14_CONSTEXPR friend bool operator<( Ch const* sv1, basic_string_view sv2 ) BOOST_NOEXCEPT
{
return sv2.compare( sv1 ) > 0;
}

BOOST_CXX14_CONSTEXPR friend bool operator<=( basic_string_view sv1, Ch const* sv2 ) BOOST_NOEXCEPT
{
return sv1.compare( sv2 ) <= 0;
}

BOOST_CXX14_CONSTEXPR friend bool operator<=( Ch const* sv1, basic_string_view sv2 ) BOOST_NOEXCEPT
{
return sv2.compare( sv1 ) >= 0;
}

BOOST_CXX14_CONSTEXPR friend bool operator>( basic_string_view sv1, Ch const* sv2 ) BOOST_NOEXCEPT
{
return sv1.compare( sv2 ) > 0;
}

BOOST_CXX14_CONSTEXPR friend bool operator>( Ch const* sv1, basic_string_view sv2 ) BOOST_NOEXCEPT
{
return sv2.compare( sv1 ) < 0;
}

BOOST_CXX14_CONSTEXPR friend bool operator>=( basic_string_view sv1, Ch const* sv2 ) BOOST_NOEXCEPT
{
return sv1.compare( sv2 ) >= 0;
}

BOOST_CXX14_CONSTEXPR friend bool operator>=( Ch const* sv1, basic_string_view sv2 ) BOOST_NOEXCEPT
{
return sv2.compare( sv1 ) <= 0;
}

// against std::string

template<class A> BOOST_CXX14_CONSTEXPR friend bool operator==( basic_string_view sv1, std::basic_string<Ch, std::char_traits<Ch>, A> const& sv2 ) BOOST_NOEXCEPT
{
return sv1.size() == sv2.size() && traits_type::compare( sv1.data(), sv2.data(), sv1.size() ) == 0;
}

template<class A> BOOST_CXX14_CONSTEXPR friend bool operator==( std::basic_string<Ch, std::char_traits<Ch>, A> const& sv1, basic_string_view sv2 ) BOOST_NOEXCEPT
{
return sv1.size() == sv2.size() && traits_type::compare( sv1.data(), sv2.data(), sv1.size() ) == 0;
}

template<class A> BOOST_CXX14_CONSTEXPR friend bool operator!=( basic_string_view sv1, std::basic_string<Ch, std::char_traits<Ch>, A> const& sv2 ) BOOST_NOEXCEPT
{
return !( sv1 == sv2 );
}

template<class A> BOOST_CXX14_CONSTEXPR friend bool operator!=( std::basic_string<Ch, std::char_traits<Ch>, A> const& sv1, basic_string_view sv2 ) BOOST_NOEXCEPT
{
return !( sv1 == sv2 );
}

template<class A> BOOST_CXX14_CONSTEXPR friend bool operator<( basic_string_view sv1, std::basic_string<Ch, std::char_traits<Ch>, A> const& sv2 ) BOOST_NOEXCEPT
{
return sv1.compare( sv2 ) < 0;
}

template<class A> BOOST_CXX14_CONSTEXPR friend bool operator<( std::basic_string<Ch, std::char_traits<Ch>, A> const& sv1, basic_string_view sv2 ) BOOST_NOEXCEPT
{
return sv2.compare( sv1 ) > 0;
}

template<class A> BOOST_CXX14_CONSTEXPR friend bool operator<=( basic_string_view sv1, std::basic_string<Ch, std::char_traits<Ch>, A> const& sv2 ) BOOST_NOEXCEPT
{
return sv1.compare( sv2 ) <= 0;
}

template<class A> BOOST_CXX14_CONSTEXPR friend bool operator<=( std::basic_string<Ch, std::char_traits<Ch>, A> const& sv1, basic_string_view sv2 ) BOOST_NOEXCEPT
{
return sv2.compare( sv1 ) >= 0;
}

template<class A> BOOST_CXX14_CONSTEXPR friend bool operator>( basic_string_view sv1, std::basic_string<Ch, std::char_traits<Ch>, A> const& sv2 ) BOOST_NOEXCEPT
{
return sv1.compare( sv2 ) > 0;
}

template<class A> BOOST_CXX14_CONSTEXPR friend bool operator>( std::basic_string<Ch, std::char_traits<Ch>, A> const& sv1, basic_string_view sv2 ) BOOST_NOEXCEPT
{
return sv2.compare( sv1 ) < 0;
}

template<class A> BOOST_CXX14_CONSTEXPR friend bool operator>=( basic_string_view sv1, std::basic_string<Ch, std::char_traits<Ch>, A> const& sv2 ) BOOST_NOEXCEPT
{
return sv1.compare( sv2 ) >= 0;
}

template<class A> BOOST_CXX14_CONSTEXPR friend bool operator>=( std::basic_string<Ch, std::char_traits<Ch>, A> const& sv1, basic_string_view sv2 ) BOOST_NOEXCEPT
{
return sv2.compare( sv1 ) <= 0;
}

#endif
};

Expand Down Expand Up @@ -980,8 +1212,14 @@ template<class Ch> BOOST_CONSTEXPR_OR_CONST std::size_t basic_string_view<Ch>::n

typedef basic_string_view<char> string_view;
typedef basic_string_view<wchar_t> wstring_view;

#if !defined(BOOST_NO_CXX11_CHAR16_T)
typedef basic_string_view<char16_t> u16string_view;
#endif

#if !defined(BOOST_NO_CXX11_CHAR32_T)
typedef basic_string_view<char32_t> u32string_view;
#endif

#if defined(__cpp_char8_t) && __cpp_char8_t >= 201811L
typedef basic_string_view<char8_t> u8string_view;
Expand All @@ -990,6 +1228,31 @@ typedef basic_string_view<char8_t> u8string_view;
} // namespace core
} // namespace boost

// std::common_reference support
// needed for iterators that have reference=string_view and value_type=std::string

#if !defined(BOOST_NO_CXX20_HDR_CONCEPTS)

template<class Ch, class A, template<class> class Q1, template<class> class Q2>
struct std::basic_common_reference<
boost::core::basic_string_view<Ch>,
std::basic_string<Ch, std::char_traits<Ch>, A>,
Q1, Q2>
{
using type = boost::core::basic_string_view<Ch>;
};

template<class Ch, class A, template<class> class Q1, template<class> class Q2>
struct std::basic_common_reference<
std::basic_string<Ch, std::char_traits<Ch>, A>,
boost::core::basic_string_view<Ch>,
Q1, Q2>
{
using type = boost::core::basic_string_view<Ch>;
};

#endif

namespace b2 {

using string_view = boost::core::string_view;
Expand Down

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