ISO/IEC TS 19568:2015 describes extensions to the C++ Standard Library (1.2). These extensions are classes and
functions that are likely to be used widely within a program and/or on the interface boundaries between libraries written
by different organizations.
ISO/IEC TS 19568:2015 is non-normative. Some of the library components in this technical specification may be
considered for standardization in a future version of C++, but they are not currently part of any C++ standard. Some of
the components in this technical specification may never be standardized, and others may be standardized in a
substantially changed form.
The goal of ISO/IEC TS 19568:2015 is to build more widespread existing practice for an expanded C++ standard
library. It gives advice on extensions to those vendors who wish to provide them.