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rolled back changes, value_type can not be an abstract base class

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[SVN r9583]
This commit is contained in:
Jeremy Siek
2001-03-19 16:56:32 +00:00
parent cf8fe4f2b1
commit 69dccc47b5
1 changed files with 1 additions and 16 deletions
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17
include/boost/detail/named_template_params.hpp
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@@ -88,24 +88,9 @@ namespace boost {
// we use is_convertible<X, iter_traits_gen_base>.
struct named_template_param_base { };
struct is_convertible_to_named_param {
template <class X> struct bind {
enum { value = is_convertible<X*, named_template_param_base*>::value };
};
};
struct not_named_param {
template <class X> struct bind {
enum { value = false };
};
};
template <class X>
struct is_named_param_list {
// If X is a reference type, we can't form a pointer and use is_convertible<X*, ...>,
// but we know that if it is a reference, it isn't a named parameter.
typedef typename ct_if<is_reference<X>::value,
not_named_param, is_convertible_to_named_param>::type IsNamedParam;
enum { value = IsNamedParam::template bind<X>::value };
enum { value = is_convertible<X, named_template_param_base>::value };
};
struct choose_named_params {