#include <type_traits>
#include <typeinfo>
#include "meta.h"
+#include "mspcore_api.h"
namespace Msp {
-class type_mismatch: public std::runtime_error
+class MSPCORE_API type_mismatch: public std::runtime_error
{
public:
type_mismatch(const std::type_info &, const std::type_info &);
};
-class Variant
+class MSPCORE_API Variant
{
public:
static constexpr unsigned INTERNAL_SIZE = 2*sizeof(void *);
const T &value() const { return const_cast<Variant *>(this)->get<T>(); }
template<typename T>
- bool has_type() const { return funcs==get_functions<typename std::remove_cv<T>::type>(); }
+ bool has_type() const { return type_equals(funcs, get_functions<typename std::remove_cv<T>::type>()); }
- bool has_same_type(const Variant &v) const { return (funcs && funcs==v.funcs); }
+ bool has_same_type(const Variant &v) const { return type_equals(funcs, v.funcs); }
template<typename T>
DEPRECATED bool check_type() const { return has_type<T>(); }
operator T() const { return value<T>(); }
private:
+ static bool type_equals(const Functions *, const Functions *);
+
template<typename T>
static constexpr bool is_small() { return (sizeof(T)<=INTERNAL_SIZE && alignof(T)<=alignof(void *)); }
return **reinterpret_cast<T **>(storage);
}
+inline bool Variant::type_equals(const Functions *funcs1, const Functions *funcs2)
+{
+ if(!funcs1 || !funcs2)
+ return false;
+ else if(funcs1==funcs2)
+ return true;
+ else
+ return funcs1->get_type()==funcs2->get_type();
+}
+
template<typename T>
inline const Variant::Functions *Variant::get_functions()
{