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Remove boost::detail::function::unusable

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This commit is contained in:
Peter Dimov
2024-01-27 07:08:12 +02:00
parent ee600cf665
commit 2570672623
1 changed files with 0 additions and 24 deletions
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24
include/boost/function/function_base.hpp
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@@ -113,30 +113,6 @@ namespace boost {
mutable char data[sizeof(function_buffer_members)];
};
/**
* The unusable class is a placeholder for unused function arguments
* It is also completely unusable except that it constructable from
* anything. This helps compilers without partial specialization to
* handle Boost.Function objects returning void.
*/
struct unusable
{
unusable() {}
template<typename T> unusable(const T&) {}
};
/* Determine the return type. This supports compilers that do not support
* void returns or partial specialization by silently changing the return
* type to "unusable".
*/
template<typename T> struct function_return_type { typedef T type; };
template<>
struct function_return_type<void>
{
typedef unusable type;
};
// The operation type to perform on the given functor/function pointer
enum functor_manager_operation_type {
clone_functor_tag,