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Add "is_null" for boxed_values to see if they contain a null shared_ptr value

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This commit is contained in:
Jason Turner
2009-11-08 16:30:12 +00:00
parent 3a37ceedb7
commit cbc61d898c
3 changed files with 31 additions and 6 deletions
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32
include/chaiscript/dispatchkit/boxed_value.hpp
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@@ -49,12 +49,20 @@ namespace chaiscript
return ptr->unique();
}
template<typename T>
static bool is_null(boost::any *a)
{
boost::shared_ptr<T> *ptr = boost::any_cast<boost::shared_ptr<T> >(a);
return ptr->get() == 0;
}
Data(const Type_Info &ti,
const boost::any &to,
bool tr,
const boost::function<bool (boost::any*)> &t_unique = boost::function<bool (boost::any*)>())
const boost::function<bool (boost::any*)> &t_unique = boost::function<bool (boost::any*)>(),
const boost::function<bool (boost::any*)> &t_is_null = boost::function<bool (boost::any*)>())
: m_type_info(ti), m_obj(to),
m_is_ref(tr), m_unique(t_unique)
m_is_ref(tr), m_unique(t_unique), m_is_null(t_is_null)
{
}
@@ -64,6 +72,7 @@ namespace chaiscript
m_obj = rhs.m_obj;
m_is_ref = rhs.m_is_ref;
m_unique = rhs.m_unique;
m_is_null = rhs.m_is_null;
return *this;
}
@@ -72,6 +81,7 @@ namespace chaiscript
boost::any m_obj;
bool m_is_ref;
boost::function<bool (boost::any*)> m_unique;
boost::function<bool (boost::any*)> m_is_null;
};
/**
@@ -111,7 +121,8 @@ namespace chaiscript
detail::Get_Type_Info<T>::get(),
boost::any(obj),
false,
&Data::unique<T>)
&Data::unique<T>,
&Data::is_null<T>)
);
std::map<std::pair<const void *, bool>, Data>::iterator itr
@@ -170,7 +181,8 @@ namespace chaiscript
detail::Get_Type_Info<T>::get(),
boost::any(boost::shared_ptr<T>(new T(t))),
false,
&Data::unique<T>)
&Data::unique<T>,
&Data::is_null<T>)
);
boost::shared_ptr<T> *ptr = boost::any_cast<boost::shared_ptr<T> >(&data->m_obj);
@@ -217,7 +229,7 @@ namespace chaiscript
}
}
std::map<std::pair<const void *, bool>, Data > m_ptrs;
std::map<std::pair<const void *, bool>, Data> m_ptrs;
int m_cullcount;
};
@@ -298,6 +310,16 @@ namespace chaiscript
return m_data->m_type_info.is_undef();
}
bool is_null() const
{
if (m_data->m_is_null)
{
return m_data->m_is_null(&m_data->m_obj);
} else {
return false;
}
}
boost::any get() const
{
return m_data->m_obj;