040000 tree ddf3c518dfe7ef58d0db4307b92205b4ce8d8f6d	2_general_utilities
040000 tree af9bf5e4502d820ec24f0fd3645132d577e9f630	3_function_objects
040000 tree 4503f1360dd20ffc77c23698be7d3f45479242ff	4_metaprogramming
040000 tree 30eac81c8f17b2db68568fb90150bd46e0f042e5	5_numerical_facilities
040000 tree 7d41bcfa058c6c3e00e58171f1ace93739594139	6_containers
040000 tree a3b147cf3934132c484f6214981c66d05787b6ad	7_regular_expressions
040000 tree 60460fbe9489efda10be914ed43c111e2f7ca88f	8_c_compatibility
040000 tree 8fda0d0017760e626d642241e5aae6f8c91ce41e	headers