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Do not use __builtin_unreachable() when not on g++ or clang. Fixes #46.

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This commit is contained in:
Peter Dimov
2020-03-01 01:19:58 +02:00
parent f321b05926
commit 1f634c7071
1 changed files with 21 additions and 19 deletions
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40
include/boost/mp11/detail/mp_with_index.hpp
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@@ -20,10 +20,12 @@
# define BOOST_MP11_CONSTEXPR14
#endif
#if defined( _MSC_VER ) && !defined( __clang__ )
# define BOOST_MP11_UNREACHABLE() __assume(false)
#if defined( __GNUC__ ) || defined( __clang__ )
# define BOOST_MP11_UNREACHABLE_DEFAULT default: __builtin_unreachable();
#elif defined( _MSC_VER )
# define BOOST_MP11_UNREACHABLE_DEFAULT default: __assume(false);
#else
# define BOOST_MP11_UNREACHABLE() __builtin_unreachable()
# define BOOST_MP11_UNREACHABLE_DEFAULT
#endif
namespace boost
@@ -80,7 +82,7 @@ template<> struct mp_with_index_impl_<2>
{
switch( i )
{
default: BOOST_MP11_UNREACHABLE();
BOOST_MP11_UNREACHABLE_DEFAULT
case 0: return std::forward<F>(f)( mp_size_t<K+0>() );
case 1: return std::forward<F>(f)( mp_size_t<K+1>() );
}
@@ -93,7 +95,7 @@ template<> struct mp_with_index_impl_<3>
{
switch( i )
{
default: BOOST_MP11_UNREACHABLE();
BOOST_MP11_UNREACHABLE_DEFAULT
case 0: return std::forward<F>(f)( mp_size_t<K+0>() );
case 1: return std::forward<F>(f)( mp_size_t<K+1>() );
case 2: return std::forward<F>(f)( mp_size_t<K+2>() );
@@ -107,7 +109,7 @@ template<> struct mp_with_index_impl_<4>
{
switch( i )
{
default: BOOST_MP11_UNREACHABLE();
BOOST_MP11_UNREACHABLE_DEFAULT
case 0: return std::forward<F>(f)( mp_size_t<K+0>() );
case 1: return std::forward<F>(f)( mp_size_t<K+1>() );
case 2: return std::forward<F>(f)( mp_size_t<K+2>() );
@@ -122,7 +124,7 @@ template<> struct mp_with_index_impl_<5>
{
switch( i )
{
default: BOOST_MP11_UNREACHABLE();
BOOST_MP11_UNREACHABLE_DEFAULT
case 0: return std::forward<F>(f)( mp_size_t<K+0>() );
case 1: return std::forward<F>(f)( mp_size_t<K+1>() );
case 2: return std::forward<F>(f)( mp_size_t<K+2>() );
@@ -138,7 +140,7 @@ template<> struct mp_with_index_impl_<6>
{
switch( i )
{
default: BOOST_MP11_UNREACHABLE();
BOOST_MP11_UNREACHABLE_DEFAULT
case 0: return std::forward<F>(f)( mp_size_t<K+0>() );
case 1: return std::forward<F>(f)( mp_size_t<K+1>() );
case 2: return std::forward<F>(f)( mp_size_t<K+2>() );
@@ -155,7 +157,7 @@ template<> struct mp_with_index_impl_<7>
{
switch( i )
{
default: BOOST_MP11_UNREACHABLE();
BOOST_MP11_UNREACHABLE_DEFAULT
case 0: return std::forward<F>(f)( mp_size_t<K+0>() );
case 1: return std::forward<F>(f)( mp_size_t<K+1>() );
case 2: return std::forward<F>(f)( mp_size_t<K+2>() );
@@ -173,7 +175,7 @@ template<> struct mp_with_index_impl_<8>
{
switch( i )
{
default: BOOST_MP11_UNREACHABLE();
BOOST_MP11_UNREACHABLE_DEFAULT
case 0: return std::forward<F>(f)( mp_size_t<K+0>() );
case 1: return std::forward<F>(f)( mp_size_t<K+1>() );
case 2: return std::forward<F>(f)( mp_size_t<K+2>() );
@@ -192,7 +194,7 @@ template<> struct mp_with_index_impl_<9>
{
switch( i )
{
default: BOOST_MP11_UNREACHABLE();
BOOST_MP11_UNREACHABLE_DEFAULT
case 0: return std::forward<F>(f)( mp_size_t<K+0>() );
case 1: return std::forward<F>(f)( mp_size_t<K+1>() );
case 2: return std::forward<F>(f)( mp_size_t<K+2>() );
@@ -212,7 +214,7 @@ template<> struct mp_with_index_impl_<10>
{
switch( i )
{
default: BOOST_MP11_UNREACHABLE();
BOOST_MP11_UNREACHABLE_DEFAULT
case 0: return std::forward<F>(f)( mp_size_t<K+0>() );
case 1: return std::forward<F>(f)( mp_size_t<K+1>() );
case 2: return std::forward<F>(f)( mp_size_t<K+2>() );
@@ -233,7 +235,7 @@ template<> struct mp_with_index_impl_<11>
{
switch( i )
{
default: BOOST_MP11_UNREACHABLE();
BOOST_MP11_UNREACHABLE_DEFAULT
case 0: return std::forward<F>(f)( mp_size_t<K+0>() );
case 1: return std::forward<F>(f)( mp_size_t<K+1>() );
case 2: return std::forward<F>(f)( mp_size_t<K+2>() );
@@ -255,7 +257,7 @@ template<> struct mp_with_index_impl_<12>
{
switch( i )
{
default: BOOST_MP11_UNREACHABLE();
BOOST_MP11_UNREACHABLE_DEFAULT
case 0: return std::forward<F>(f)( mp_size_t<K+0>() );
case 1: return std::forward<F>(f)( mp_size_t<K+1>() );
case 2: return std::forward<F>(f)( mp_size_t<K+2>() );
@@ -278,7 +280,7 @@ template<> struct mp_with_index_impl_<13>
{
switch( i )
{
default: BOOST_MP11_UNREACHABLE();
BOOST_MP11_UNREACHABLE_DEFAULT
case 0: return std::forward<F>(f)( mp_size_t<K+0>() );
case 1: return std::forward<F>(f)( mp_size_t<K+1>() );
case 2: return std::forward<F>(f)( mp_size_t<K+2>() );
@@ -302,7 +304,7 @@ template<> struct mp_with_index_impl_<14>
{
switch( i )
{
default: BOOST_MP11_UNREACHABLE();
BOOST_MP11_UNREACHABLE_DEFAULT
case 0: return std::forward<F>(f)( mp_size_t<K+0>() );
case 1: return std::forward<F>(f)( mp_size_t<K+1>() );
case 2: return std::forward<F>(f)( mp_size_t<K+2>() );
@@ -327,7 +329,7 @@ template<> struct mp_with_index_impl_<15>
{
switch( i )
{
default: BOOST_MP11_UNREACHABLE();
BOOST_MP11_UNREACHABLE_DEFAULT
case 0: return std::forward<F>(f)( mp_size_t<K+0>() );
case 1: return std::forward<F>(f)( mp_size_t<K+1>() );
case 2: return std::forward<F>(f)( mp_size_t<K+2>() );
@@ -353,7 +355,7 @@ template<> struct mp_with_index_impl_<16>
{
switch( i )
{
default: BOOST_MP11_UNREACHABLE();
BOOST_MP11_UNREACHABLE_DEFAULT
case 0: return std::forward<F>(f)( mp_size_t<K+0>() );
case 1: return std::forward<F>(f)( mp_size_t<K+1>() );
case 2: return std::forward<F>(f)( mp_size_t<K+2>() );
@@ -388,7 +390,7 @@ template<class N, class F> inline BOOST_MP11_CONSTEXPR14 decltype(std::declval<F
}
#undef BOOST_MP11_CONSTEXPR14
#undef BOOST_MP11_UNREACHABLE
#undef BOOST_MP11_UNREACHABLE_DEFAULT
} // namespace mp11
} // namespace boost