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fixed for borland

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[SVN r9508]
This commit is contained in:
Jeremy Siek
2001-03-08 21:12:30 +00:00
parent be12189340
commit fe148355a2
1 changed files with 29 additions and 2 deletions
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31
include/boost/detail/named_template_params.hpp
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@@ -8,6 +8,9 @@
#define BOOST_DETAIL_NAMED_TEMPLATE_PARAMS_HPP
#include <boost/type_traits/conversion_traits.hpp>
#if defined(__BORLANDC__)
#include <boost/type_traits/ice.hpp>
#endif
namespace boost {
namespace detail {
@@ -26,8 +29,14 @@ namespace boost {
typedef detail::dummy_default_gen type;
};
template <class T> struct is_default { enum { value = false }; };
template <> struct is_default<default_argument> { enum { value = true }; };
template <class T> struct is_default {
enum { value = false };
typedef type_traits::no_type type;
};
template <> struct is_default<default_argument> {
enum { value = true };
typedef type_traits::yes_type type;
};
struct choose_default {
template <class Arg, class DefaultGen, class Base, class Traits>
@@ -42,17 +51,33 @@ namespace boost {
typedef Arg type;
};
};
#if defined(__BORLANDC__)
template <class UseDefault>
struct choose_arg_or_default { typedef choose_arg type; };
template <>
struct choose_arg_or_default<type_traits::yes_type> {
typedef choose_default type;
};
#else
template <bool UseDefault>
struct choose_arg_or_default { typedef choose_arg type; };
template <>
struct choose_arg_or_default<true> {
typedef choose_default type;
};
#endif
template <class Arg, class DefaultGen, class Base, class Traits>
class resolve_default {
#if defined(__BORLANDC__)
typedef typename choose_arg_or_default<typename is_default<Arg>::type>::type Selector;
#else
// This usually works for Borland, but I'm seeing weird errors in
// iterator_adaptor_test.cpp when using this method.
enum { is_def = is_default<Arg>::value };
typedef typename choose_arg_or_default<is_def>::type Selector;
#endif
public:
typedef typename Selector
::template bind<Arg, DefaultGen, Base, Traits>::type type;
@@ -75,6 +100,7 @@ namespace boost {
typedef detail::default_argument type;
};
};
template <bool Named> struct choose_default_dispatch { };
template <> struct choose_default_dispatch<true> {
typedef choose_named_params type;
@@ -83,6 +109,7 @@ namespace boost {
typedef choose_default_arg type;
};
template <class PreviousArg>
struct choose_default_argument {
enum { is_named = is_named_param_list<PreviousArg>::value };