| __cxxabiv1 | |
| __gnu_cxx | GNU extensions for public use |
| __gnu_cxx::__debug | |
| __gnu_cxx::__detail | Implementation details not part of the namespace __gnu_cxx interface |
| __gnu_cxx::typelist | GNU typelist extensions for public compile-time use |
| __gnu_cxx::typelist::detail | |
| __gnu_debug | GNU debug mode classes for public use |
| __gnu_internal | GNU implemenation details, not for public use or export. Used only when anonymous namespaces cannot be substituted |
| abi | The cross-vendor C++ Application Binary Interface. A namespace alias to __cxxabiv1 |
| pb_ds | |
| pb_ds::detail | |
| std | Everything defined by the ISO C++ Standard is within namespace std |
| std::__debug | |
| std::__detail | Implementation details not part of the namespace std interface |
| std::rel_ops | The generated relational operators are sequestered here |
| std::tr1 | Everything defined by the ISO C++ TR1 is within namespace std::tr1 |
| std::tr1::__detail | Implementation details not part of the namespace std::tr1 interface |
1.5.1