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Contents
// Ruby 2.7 now includes a similarly named macro that uses templates to
// pick the right overload for the underlying function. That doesn't work
// for our cases because we are using this method dynamically and get a
// compilation error otherwise. This removes the macro and lets us fall
// back to the C-API underneath again.
#undef rb_define_method_id
namespace Rice::detail
{
// Effective Java (2nd edition)
// https://stackoverflow.com/a/2634715
inline size_t MethodData::key(VALUE klass, ID id)
{
if (rb_type(klass) == T_ICLASS)
{
klass = detail::protect(rb_class_of, klass);
}
uint32_t prime = 53;
return (prime + klass) * prime + id;
}
template <typename Return_T>
inline Return_T MethodData::data()
{
ID id;
VALUE klass;
if (!rb_frame_method_id_and_class(&id, &klass))
{
rb_raise(rb_eRuntimeError, "Cannot get method id and class for function");
}
auto iter = methodWrappers_.find(key(klass, id));
if (iter == methodWrappers_.end())
{
rb_raise(rb_eRuntimeError, "Could not find data for klass and method id");
}
std::any data = iter->second;
return std::any_cast<Return_T>(data);
}
template<typename Function_T>
inline void MethodData::define_method(VALUE klass, ID id, Function_T func, int arity, std::any data)
{
// Define the method
protect(rb_define_method_id, klass, id, (RUBY_METHOD_FUNC)func, arity);
// Now store data about it
methodWrappers_[key(klass, id)] = data;
}
}
Version data entries
5 entries across 5 versions & 1 rubygems