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Repair VC7.1 is_convertible checks

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[SVN r858]
This commit is contained in:
Dave Abrahams
2003-01-14 23:22:52 +00:00
parent 30a6b03a93
commit ab750320d3
1 changed files with 9 additions and 5 deletions
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14
include/boost/iterator/iterator_adaptors.hpp
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@@ -30,9 +30,7 @@
# define BOOST_ARG_DEP_TYPENAME typename
#endif
// CWPro7 never works, and unfortunately vc7.1 final beta sometimes fails
#if BOOST_WORKAROUND(__MWERKS__, <=0x2407) \
|| BOOST_WORKAROUND(_MSC_FULL_VER, BOOST_TESTED_AT(13102292) && BOOST_MSVC > 1300)
#if BOOST_WORKAROUND(__MWERKS__, <=0x2407)
# define BOOST_NO_IS_CONVERTIBLE // "is_convertible doesn't always work"
#endif
@@ -109,7 +107,7 @@ namespace boost
//
template <typename A, typename B>
struct is_interoperable
#if defined(BOOST_NO_IS_CONVERTIBLE) && !(BOOST_MSVC > 1300) // vc7.1 is_convertible works sometimes
#if defined(BOOST_NO_IS_CONVERTIBLE)
: mpl::true_c
#else
: mpl::logical_or<
@@ -221,11 +219,17 @@ namespace boost
{
// Borland 551 and vc6 have a problem with the use of base class
// forwarding in this template, so we write it all out here
#if defined(BOOST_NO_IS_CONVERTIBLE) || defined(BOOST_NO_SFINAE)
# if defined(BOOST_NO_IS_CONVERTIBLE) || defined(BOOST_NO_SFINAE)
typedef detail::enable_type type;
# else
typedef typename detail::enabled<
# if BOOST_WORKAROUND(_MSC_FULL_VER, BOOST_TESTED_AT(13102292) && BOOST_MSVC > 1300)
// For some reason vc7.1 needs us to "cut off" instantiation
// of is_convertible in the case where From == To.
mpl::logical_or<is_same<From,To>, is_convertible<From, To> >::value
# else
::boost::is_convertible<From, To>::value
# endif
>::template base<detail::enable_type>::type type;
# endif
};