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Add BOOST_CONSTEXPR to endian_reverse functions

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This commit is contained in:
Peter Dimov
2019-10-11 18:49:06 +03:00
parent 80d926e700
commit cc28f5d658
2 changed files with 16 additions and 16 deletions
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30
include/boost/endian/conversion.hpp
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@ -47,28 +47,28 @@ namespace endian
// reverse byte order
// requires T to be a non-bool integral type
// in detail/endian_reverse.hpp
template<class T> inline T endian_reverse( T x ) BOOST_NOEXCEPT;
template<class T> inline BOOST_CONSTEXPR T endian_reverse( T x ) BOOST_NOEXCEPT;
// reverse byte order unless native endianness is big
template <class EndianReversible >
inline EndianReversible big_to_native(EndianReversible x) BOOST_NOEXCEPT;
inline BOOST_CONSTEXPR EndianReversible big_to_native(EndianReversible x) BOOST_NOEXCEPT;
// Returns: x if native endian order is big, otherwise endian_reverse(x)
template <class EndianReversible >
inline EndianReversible native_to_big(EndianReversible x) BOOST_NOEXCEPT;
inline BOOST_CONSTEXPR EndianReversible native_to_big(EndianReversible x) BOOST_NOEXCEPT;
// Returns: x if native endian order is big, otherwise endian_reverse(x)
// reverse byte order unless native endianness is little
template <class EndianReversible >
inline EndianReversible little_to_native(EndianReversible x) BOOST_NOEXCEPT;
inline BOOST_CONSTEXPR EndianReversible little_to_native(EndianReversible x) BOOST_NOEXCEPT;
// Returns: x if native endian order is little, otherwise endian_reverse(x)
template <class EndianReversible >
inline EndianReversible native_to_little(EndianReversible x) BOOST_NOEXCEPT;
inline BOOST_CONSTEXPR EndianReversible native_to_little(EndianReversible x) BOOST_NOEXCEPT;
// Returns: x if native endian order is little, otherwise endian_reverse(x)
// generic conditional reverse byte order
template <BOOST_SCOPED_ENUM(order) From, BOOST_SCOPED_ENUM(order) To,
class EndianReversible>
inline EndianReversible conditional_reverse(EndianReversible from) BOOST_NOEXCEPT;
inline BOOST_CONSTEXPR EndianReversible conditional_reverse(EndianReversible from) BOOST_NOEXCEPT;
// Returns: If From == To have different values, from.
// Otherwise endian_reverse(from).
// Remarks: The From == To test, and as a consequence which form the return takes, is
@ -76,7 +76,7 @@ namespace endian
// runtime conditional reverse byte order
template <class EndianReversible >
inline EndianReversible conditional_reverse(EndianReversible from,
inline BOOST_CONSTEXPR EndianReversible conditional_reverse(EndianReversible from,
BOOST_SCOPED_ENUM(order) from_order, BOOST_SCOPED_ENUM(order) to_order)
BOOST_NOEXCEPT;
// Returns: from_order == to_order ? from : endian_reverse(from).
@ -154,7 +154,7 @@ template<class T> struct is_endian_reversible: boost::integral_constant<bool,
} // namespace detail
template <class EndianReversible>
inline EndianReversible big_to_native( EndianReversible x ) BOOST_NOEXCEPT
inline BOOST_CONSTEXPR EndianReversible big_to_native( EndianReversible x ) BOOST_NOEXCEPT
{
BOOST_STATIC_ASSERT( detail::is_endian_reversible<EndianReversible>::value );
@ -170,7 +170,7 @@ inline EndianReversible big_to_native( EndianReversible x ) BOOST_NOEXCEPT
}
template <class EndianReversible>
inline EndianReversible native_to_big( EndianReversible x ) BOOST_NOEXCEPT
inline BOOST_CONSTEXPR EndianReversible native_to_big( EndianReversible x ) BOOST_NOEXCEPT
{
BOOST_STATIC_ASSERT( detail::is_endian_reversible<EndianReversible>::value );
@ -186,7 +186,7 @@ inline EndianReversible native_to_big( EndianReversible x ) BOOST_NOEXCEPT
}
template <class EndianReversible>
inline EndianReversible little_to_native( EndianReversible x ) BOOST_NOEXCEPT
inline BOOST_CONSTEXPR EndianReversible little_to_native( EndianReversible x ) BOOST_NOEXCEPT
{
BOOST_STATIC_ASSERT( detail::is_endian_reversible<EndianReversible>::value );
@ -202,7 +202,7 @@ inline EndianReversible little_to_native( EndianReversible x ) BOOST_NOEXCEPT
}
template <class EndianReversible>
inline EndianReversible native_to_little( EndianReversible x ) BOOST_NOEXCEPT
inline BOOST_CONSTEXPR EndianReversible native_to_little( EndianReversible x ) BOOST_NOEXCEPT
{
BOOST_STATIC_ASSERT( detail::is_endian_reversible<EndianReversible>::value );
@ -221,13 +221,13 @@ namespace detail
{
template<class EndianReversible>
inline EndianReversible conditional_reverse_impl( EndianReversible x, boost::true_type ) BOOST_NOEXCEPT
inline BOOST_CONSTEXPR EndianReversible conditional_reverse_impl( EndianReversible x, boost::true_type ) BOOST_NOEXCEPT
{
return x;
}
template<class EndianReversible>
inline EndianReversible conditional_reverse_impl( EndianReversible x, boost::false_type ) BOOST_NOEXCEPT
inline BOOST_CONSTEXPR EndianReversible conditional_reverse_impl( EndianReversible x, boost::false_type ) BOOST_NOEXCEPT
{
return endian_reverse( x );
}
@ -236,7 +236,7 @@ inline EndianReversible conditional_reverse_impl( EndianReversible x, boost::fal
// generic conditional reverse
template <BOOST_SCOPED_ENUM(order) From, BOOST_SCOPED_ENUM(order) To, class EndianReversible>
inline EndianReversible conditional_reverse( EndianReversible x ) BOOST_NOEXCEPT
inline BOOST_CONSTEXPR EndianReversible conditional_reverse( EndianReversible x ) BOOST_NOEXCEPT
{
BOOST_STATIC_ASSERT( detail::is_endian_reversible<EndianReversible>::value );
return detail::conditional_reverse_impl( x, boost::integral_constant<bool, From == To>() );
@ -244,7 +244,7 @@ inline EndianReversible conditional_reverse( EndianReversible x ) BOOST_NOEXCEPT
// runtime conditional reverse
template <class EndianReversible>
inline EndianReversible conditional_reverse( EndianReversible x,
inline BOOST_CONSTEXPR EndianReversible conditional_reverse( EndianReversible x,
BOOST_SCOPED_ENUM(order) from_order, BOOST_SCOPED_ENUM(order) to_order ) BOOST_NOEXCEPT
{
BOOST_STATIC_ASSERT( detail::is_endian_reversible<EndianReversible>::value );

2
include/boost/endian/detail/endian_reverse.hpp
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@ -82,7 +82,7 @@ inline uint64_t endian_reverse_impl(uint64_t x) BOOST_NOEXCEPT
// Requires:
// T is non-bool integral
template<class T> inline T endian_reverse( T x ) BOOST_NOEXCEPT
template<class T> inline BOOST_CONSTEXPR T endian_reverse( T x ) BOOST_NOEXCEPT
{
BOOST_STATIC_ASSERT( is_integral<T>::value && !is_same<T, bool>::value );