Vulkan-Hpp/snippets/ArrayProxy.hpp

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template <typename T>
class ArrayProxy
{
public:
VULKAN_HPP_CONSTEXPR ArrayProxy() VULKAN_HPP_NOEXCEPT
: m_count( 0 )
, m_ptr( nullptr )
{}
VULKAN_HPP_CONSTEXPR ArrayProxy( std::nullptr_t ) VULKAN_HPP_NOEXCEPT
: m_count( 0 )
, m_ptr( nullptr )
{}
ArrayProxy( T const & value ) VULKAN_HPP_NOEXCEPT
: m_count( 1 )
, m_ptr( &value )
{}
ArrayProxy( uint32_t count, T const * ptr ) VULKAN_HPP_NOEXCEPT
: m_count( count )
, m_ptr( ptr )
{}
template <std::size_t C>
ArrayProxy( T const ( &ptr )[C] ) VULKAN_HPP_NOEXCEPT
: m_count( C )
, m_ptr( ptr )
{}
# if __GNUC__ >= 9
# pragma GCC diagnostic push
# pragma GCC diagnostic ignored "-Winit-list-lifetime"
# endif
ArrayProxy( std::initializer_list<T> const & list ) VULKAN_HPP_NOEXCEPT
: m_count( static_cast<uint32_t>( list.size() ) )
, m_ptr( list.begin() )
{}
template <typename B = T, typename std::enable_if<std::is_const<B>::value, int>::type = 0>
ArrayProxy( std::initializer_list<typename std::remove_const<T>::type> const & list ) VULKAN_HPP_NOEXCEPT
: m_count( static_cast<uint32_t>( list.size() ) )
, m_ptr( list.begin() )
{
}
#if __GNUC__ >= 9
# pragma GCC diagnostic pop
# endif
// Any type with a .data() return type implicitly convertible to T*, and a .size() return type implicitly
// convertible to size_t. The const version can capture temporaries, with lifetime ending at end of statement.
template <typename V,
typename std::enable_if<
std::is_convertible<decltype( std::declval<V>().data() ), T *>::value &&
std::is_convertible<decltype( std::declval<V>().size() ), std::size_t>::value>::type * = nullptr>
ArrayProxy( V const & v ) VULKAN_HPP_NOEXCEPT
: m_count( static_cast<uint32_t>( v.size() ) )
, m_ptr( v.data() )
{}
const T * begin() const VULKAN_HPP_NOEXCEPT
{
return m_ptr;
}
const T * end() const VULKAN_HPP_NOEXCEPT
{
return m_ptr + m_count;
}
const T & front() const VULKAN_HPP_NOEXCEPT
{
VULKAN_HPP_ASSERT( m_count && m_ptr );
return *m_ptr;
}
const T & back() const VULKAN_HPP_NOEXCEPT
{
VULKAN_HPP_ASSERT( m_count && m_ptr );
return *( m_ptr + m_count - 1 );
}
bool empty() const VULKAN_HPP_NOEXCEPT
{
return ( m_count == 0 );
}
uint32_t size() const VULKAN_HPP_NOEXCEPT
{
return m_count;
}
T const * data() const VULKAN_HPP_NOEXCEPT
{
return m_ptr;
}
private:
uint32_t m_count;
T const * m_ptr;
};