# libstdc++ Namespace List

Here is a list of all documented namespaces with brief descriptions:

__cxxabiv1 |
__gnu_cxx | GNU extensions for public use
__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 classes for public use
__gnu_internal | GNU implemenation details, not for public use or export. Used only when anonymous namespaces cannot be substituted
__gnu_parallel | GNU parallel code for public use
__gnu_pbds | GNU extensions for policy-based data structures for public use
__gnu_pbds::detail |
__gnu_sequential | GNU sequential classes for public use
abi | The cross-vendor C++ Application Binary Interface. A namespace alias to __cxxabiv1
std | ISO C++ entities toplevel namespace is std
std::__debug | GNU debug code, replaces standard behavior with debug behavior
std::__detail | Implementation details not part of the namespace std interface
std::__parallel | GNU parallel code, replaces standard behavior with parallel behavior
std::placeholders | ISO C++ 0x entities sub namespace for functional
std::regex_constants | ISO C++ 0x entities sub namespace for regex
std::rel_ops | The generated relational operators are sequestered here
std::tr1 | ISO C++ TR1 entities toplevel namespace is std::tr1
std::tr1::__detail | Implementation details not part of the namespace std::tr1 interface