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function_base.hpp:

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function_template.hpp:
  - Revert to older implementation of has_empty_function (Metrowerks doesn't
    handle is_base_and_derived correctly)


[SVN r13854]
This commit is contained in:
Douglas Gregor
2002-05-14 14:18:36 +00:00
parent d1f21800ac
commit 4d635501ab
2 changed files with 7 additions and 21 deletions
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16
include/boost/function/function_base.hpp
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@ -341,20 +341,14 @@ namespace boost {
namespace detail {
namespace function {
// The result is not a Boost.Function object, so we assume that this
// target is not empty
template<typename FunctionObj>
inline bool has_empty_target(const FunctionObj&, truth<false>)
inline bool has_empty_target(const function_base* f)
{
return false;
return f->empty();
}
// The result is a Boost.Function object, so query whether it is empty
// or not
template<typename FunctionObj>
inline bool has_empty_target(const FunctionObj& f, truth<true>)
{
return f.empty();
inline bool has_empty_target(...)
{
return false;
}
} // end namespace function
} // end namespace detail