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rolled back g++ fix, since it didn't work

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[SVN r8832]
This commit is contained in:
Jeremy Siek
2001-01-31 18:28:51 +00:00
parent ed10188083
commit 8ae858cc79
1 changed files with 1 additions and 42 deletions
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43
include/boost/detail/type_traits.hpp
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@ -10,8 +10,6 @@
// see libs/utility/type_traits.htm
/* Release notes:
31 Jan 2001:
Fixes for is_convertible with g++. (Jeremy Siek)
21 Jan 2001:
Fixed tests for long long to detect its presence on GCC (David Abrahams)
03 Oct 2000:
@ -470,51 +468,13 @@ template <typename T, std::size_t sz> struct is_POD<T[sz]>
//
// is one type convertable to another?
#if defined(__GNUC__)
template <bool isPOD_or_nonclass, class From, class To>
struct is_convertible_dispatch {
typedef char (&no)[1];
typedef char (&yes)[2];
template <class T>
struct checker {
static no check(...);
static yes check(T);
};
static From from;
static const bool value = sizeof( checker<To>::check(from) ) == sizeof(yes);
};
template <class From, class To>
struct is_convertible_dispatch<false, From, To> {
typedef char (&no)[1];
typedef char (&yes)[2];
template <class T>
struct checker {
static no check(void*);
static yes check(T*);
};
static From from;
static const bool value = sizeof( checker<To>::check(&from) ) == sizeof(yes);
};
template <class From, class To>
struct is_convertible
{
private:
typedef is_convertible_dispatch<is_POD<From>::value
|| !BOOST_IS_CLASS(From) || is_reference<From>::value, From, To> Dispatch;
public:
static const bool value = Dispatch::value;
};
#else // not __GNUC__
template <class From, class To>
struct is_convertible
{
private:
typedef char (&no)[1];
typedef char (&yes)[2];
# if defined(__BORLANDC__)
# if defined(__BORLANDC__) || defined(__GNUC__)
// This workaround for Borland breaks the EDG C++ frontend,
// so we only use it for Borland.
template <class T>
@ -535,7 +495,6 @@ public:
# endif
void foo(); // avoid warning about all members being private
};
#endif // not __GNUC__
template <class From>
struct is_convertible<From, void>