I have following code to test one concept from a bigger program, and I try to compile with GCC 4.1.1 on Linux. I cannot use newer version of compiler due to corporate environment restrictions and so I have to make it compiling and working with currently available compiler version.
// test.cpp - my tr1::unordered_map usage example
#include <iostream>
#include <tr1/unordered_map>
namespace YY {
class X { public: X(int z_val = 0); private: int z; };
inline X::X(int z_val) : z(z_val) {}
enum XTE { Xt1, Xt2, Xt3 };
}
namespace std { namespace tr1 {
#define _my_tr1_hashtable_define_trivial_hash(T) \
template<> \
struct hash<T> \
: public std::unary_function<T, std::size_t> \
{ \
std::size_t \
operator()(T val) const \
{ return static_cast<std::size_t>(val); } \
}
_my_tr1_hashtable_define_trivial_hash(YY::XTE);
#undef _my_tr1_hashtable_define_trivial_hash
}}
namespace YY {
typedef std::tr1::unordered_map<long long, X*> TXM;
typedef std::tr1::unordered_map<XTE, TXM> TTXM;
}
int main()
{
YY::TTXM m;
std::cout << m.size();
return 0;
}
Then I try to compile this code, gcc gives me following error:
$ g++ -c test.cpp /usr/lib/gcc/x86_64-redhat-linux/4.1.1/../../../../include/c++/4.1.1/tr1/hashtable: In instantiation of Б─≤Internal::hash_code_base, Internal::extract1st >, std::equal_to, std::tr1::hash, Internal::mod_range_hashing, Internal::default_ranged_hash, false>Б─≥: /usr/lib/gcc/x86_64-redhat-linux/4.1.1/../../../../include/c++/4.1.1/tr1/hashtable:1014: instantiated from Б─≤std::tr1::hashtable, std::allocator >, Internal::extract1st >, std::equal_to, std::tr1::hash, Internal::mod_range_hashing, Internal::default_ranged_hash, Internal::prime_rehash_policy, false, false, true>Б─≥ /usr/lib/gcc/x86_64-redhat-linux/4.1.1/../../../../include/c++/4.1.1/tr1/unordered_map:63: instantiated from Б─≤std::tr1::unordered_map, std::equal_to, std::allocator >, false>Б─≥ /usr/lib/gcc/x86_64-redhat-linux/4.1.1/../../../../include/c++/4.1.1/bits/stl_pair.h:74: instantiated from Б─≤std::pair, std::equal_to, std::allocator >, false> >Б─≥ /usr/lib/gcc/x86_64-redhat-linux/4.1.1/../../../../include/c++/4.1.1/tr1/hashtable:413: instantiated from Б─≤Internal::extract1st, std::equal_to, std::allocator >, false> > >Б─≥ /usr/lib/gcc/x86_64-redhat-linux/4.1.1/../../../../include/c++/4.1.1/tr1/hashtable:861: instantiated from Б─≤Internal::hash_code_base, std::equal_to, std::allocator >, false> >, Internal::extract1st, std::equal_to, std::allocator >, false> > >, std::equal_to, std::tr1::hash, Internal::mod_range_hashing, Internal::default_ranged_hash, false>Б─≥ /usr/lib/gcc/x86_64-redhat-linux/4.1.1/../../../../include/c++/4.1.1/tr1/hashtable:1014: instantiated from Б─≤std::tr1::hashtable, std::equal_to, std::allocator >, false> >, std::allocator, std::equal_to, std::allocator >, false> > >, Internal::extract1st, std::equal_to, std::allocator >, false> > >, std::equal_to, std::tr1::hash, Internal::mod_range_hashing, Internal::default_ranged_hash, Internal::prime_rehash_policy, false, false, true>Б─≥ /usr/lib/gcc/x86_64-redhat-linux/4.1.1/../../../../include/c++/4.1.1/tr1/unordered_map:63: instantiated from Б─≤std::tr1::unordered_map, std::equal_to, std::allocator >, false>, std::tr1::hash, std::equal_to, std::allocator, std::equal_to, std::allocator >, false> > >, false>Б─≥ test.cpp:42: instantiated from here /usr/lib/gcc/x86_64-redhat-linux/4.1.1/../../../../include/c++/4.1.1/tr1/hashtable:863: error: Б─≤Internal::hash_code_base::m_h1Б─≥ has incomplete type /usr/lib/gcc/x86_64-redhat-linux/4.1.1/../../../../include/c++/4.1.1/tr1/functional:1101: error: declaration of Б─≤struct std::tr1::hashБ─≥
test.cpp:42: instantiated from here is
YY::TTXM m;
If I change
typedef std::tr1::unordered_map<XTE, TXM> TTXM;
into
typedef std::tr1::unordered_map<XTE, TXM*> TTXM;
it compiles succesfully, but this is not what I want to do. Any ideas, suggestions, how to make this work?