Hello,
I was using the boost tuples library (from boost 1.31) to create a cache key. However, the Solaris compiler (SUNWspro v6.2.p1) complained when I tried to access the last element in the tuple. My class looked something like this:
typedef enum result_type_id {
...
} ResultTypeID;
class ParamStateKey;
class Cache
{
typedef boost::tuple key_type;
// cache implementation
...
// some helper functions defined to hide the boost::tuple interface
static ParamStateKey &GetState(key_type &k) { return boost::tuples::get<0>(k); }
static ResultTypeID &GetGreek(key_type &k) { return boost::tuples::get<1>(k); }
static int &GetProduct(key_type &k) { return boost::tuples::get<2>(k); }
static int &GetSubpage(key_type &k) { return boost::tuples::get<3>(k); }
static int &GetBucket(key_type &k) { return boost::tuples::get<4>(k); }
static key_type MakeKey(const ParamStateKey &psk, ResultTypeID r, int p1, int p2, int bkt)
{
return boost::tuples::make_tuple(psk, r, p1, p2, bkt);
}
};
The solaris compiler complained whenever I tried to call Cache::GetBucket() with the following error:
"../../../../incl/3rd/boost/tuple/detail/tuple_basic.hpp", line 105: Error: Could not find a match for boost::tuples::detail::get_class<0>::get::RET, boost::tuples::detail::get_class<0>::HT, boost::tuples::detail::get_class<0>::TT>(boost::tuples::cons).
"../../../../incl/3rd/boost/tuple/detail/tuple_basic.hpp", line 105: Where: While instantiating "static boost::tuples::detail::get_class<1>::get>(boost::tuples::cons>&)".
"../../../../incl/3rd/boost/tuple/detail/tuple_basic.hpp", line 105: Where: Instantiated from non-template code.
Firstly, I have no way of deciphering that error message. Through trial and error, I found that removing the GetBucket() calls solved the problem. However, I needed these calls. I reasoned that since the other helper functions worked, it was a problem accessing the last element of the tuple. So I created a dummy entry in the tuple and redefined my typedef:
typedef boost::tuple key_type;
This work-around is fine, so this is not an urgent problem. But it seems like this should not be necessary.
________________________________________
Darren Gilbert
Associate Director
UBS - Equities Quantitative Strategies
Phone: +1 (312) 525-5766
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-- Herb Stein, Chairman of the Council of Economic Advisors under Nixon
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