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added dummy versions of enable_if templates for platforms that

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have BOOST_NO_SFINAE defined


[SVN r21154]
This commit is contained in:
Jaakko Järvi
2003-12-05 21:38:43 +00:00
parent 484d184de5
commit 3155044abd
1 changed files with 41 additions and 0 deletions
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41
include/boost/utility/enable_if.hpp
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@@ -15,6 +15,7 @@
#define BOOST_UTILITY_ENABLE_IF_HPP #define BOOST_UTILITY_ENABLE_IF_HPP
#include <boost/config.hpp> #include <boost/config.hpp>
#include <boost/static_assert.hpp>
// Even the definition of enable_if causes problems on some compilers, // Even the definition of enable_if causes problems on some compilers,
// so it's macroed out for all compilers that do not support SFINAE // so it's macroed out for all compilers that do not support SFINAE
@@ -71,6 +72,46 @@ namespace boost
} // namespace boost } // namespace boost
#else
namespace boost {
BOOST_STATIC_CONSTANT(bool, enable_if_does_not_work_on_this_compiler = false);
template <bool B, class T = void>
struct enable_if_c
{ BOOST_STATIC_ASSERT(enable_if_does_not_work_on_this_compiler); };
template <bool B, class T = void>
struct disable_if_c
{ BOOST_STATIC_ASSERT(enable_if_does_not_work_on_this_compiler); };
template <bool B, class T = void>
struct lazy_enable_if_c
{ BOOST_STATIC_ASSERT(enable_if_does_not_work_on_this_compiler); };
template <bool B, class T = void>
struct lazy_disable_if_c
{ BOOST_STATIC_ASSERT(enable_if_does_not_work_on_this_compiler); };
template <class Cond, class T = void>
struct enable_if
{ BOOST_STATIC_ASSERT(enable_if_does_not_work_on_this_compiler); };
template <class Cond, class T = void>
struct disable_if
{ BOOST_STATIC_ASSERT(enable_if_does_not_work_on_this_compiler); };
template <class Cond, class T = void>
struct lazy_enable_if
{ BOOST_STATIC_ASSERT(enable_if_does_not_work_on_this_compiler); };
template <class Cond, class T = void>
struct lazy_disable_if
{ BOOST_STATIC_ASSERT(enable_if_does_not_work_on_this_compiler); };
} // namespace boost
#endif // BOOST_NO_SFINAE #endif // BOOST_NO_SFINAE
#endif #endif