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tru64cxx6.5 fixes

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[SVN r14421]
This commit is contained in:
Dave Abrahams
2002-07-12 14:32:20 +00:00
parent cb5b83ef53
commit 7d3864be03
1 changed files with 55 additions and 5 deletions
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56
include/boost/cast.hpp
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@@ -166,13 +166,63 @@ namespace boost
};
// Move to namespace boost in utility.hpp?
template <class T>
struct fixed_numeric_limits
template <class T, bool specialized>
struct fixed_numeric_limits_base
: public numeric_min_select<
std::numeric_limits<T>::is_signed
>::template limits<T>
{};
template <class T>
struct fixed_numeric_limits
: fixed_numeric_limits_base<T,(std::numeric_limits<T>::is_specialized)>
{};
# ifdef BOOST_HAS_LONG_LONG
// cover implementations which supply no specialization for long
// long / unsigned long long. Not intended to be full
// numeric_limits replacements, but good enough for numeric_cast<>
template <>
struct fixed_numeric_limits_base<long long, false>
{
BOOST_STATIC_CONSTANT(bool, is_specialized = true);
BOOST_STATIC_CONSTANT(bool, is_signed = true);
static long long max()
{
# ifdef LONGLONG_MAX
return LONGLONG_MAX;
# else
return 9223372036854775807LL; // hope this is portable
# endif
}
static long long min()
{
# ifdef LONGLONG_MIN
return LONGLONG_MIN;
# else
return -9223372036854775808LL; // hope this is portable
# endif
}
};
template <>
struct fixed_numeric_limits_base<unsigned long long, false>
{
BOOST_STATIC_CONSTANT(bool, is_specialized = true);
BOOST_STATIC_CONSTANT(bool, is_signed = false);
static unsigned long long max()
{
# ifdef ULONGLONG_MAX
return ULONGLONG_MAX;
# else
return 0xffffffffffffffffULL; // hope this is portable
# endif
}
static unsigned long long min() { return 0; }
};
# endif
} // namespace detail
// less_than_type_min -
@@ -310,7 +360,7 @@ namespace boost
inline Target numeric_cast(Source arg BOOST_EXPLICIT_DEFAULT_TARGET)
{
// typedefs abbreviating respective trait classes
typedef std::numeric_limits<Source> arg_traits;
typedef detail::fixed_numeric_limits<Source> arg_traits;
typedef detail::fixed_numeric_limits<Target> result_traits;
#if !defined(BOOST_NO_LIMITS_COMPILE_TIME_CONSTANTS) || defined(BOOST_SGI_CPP_LIMITS)