High Quality Content by WIKIPEDIA articles! C++ Technical Report 1 (TR1) is the common name for ISO/IEC TR 19768, C++ Library Extensions, which was a document proposing additions to the C++ standard library for the C++03 language standard. The additions include regular expressions, smart pointers, hash tables, and random number generators. TR1 was not a standard itself, but rather a draft document. However, most of its proposals became part of the current official standard, C++11. Before C++11 was standardized, vendors used this document as a guide to create extensions. The report`s goal was "to build more widespread existing practice for an expanded C++ standard library."