C++ Library Extensions.pdf

ISO/IEC DTR 19768 is a draft technical report on C++ library extensions. The document is divided into several sections, including:

1. General: This section introduces the purpose and scope of the document, and provides an overview of the C++ standard library.
2. General Utilities: This section describes several utility classes and functions, including:
Reference wrappers: a class template that provides a wrapper around a reference to an object.
Smart pointers: a set of class templates that provide smart pointer functionality, including `sharedptr` and `weakptr`.
3. Function objects: This section describes several function object classes and functions, including:
`memfn`: a function template that returns a function object that calls a member function on an object.
`bind`: a function template that returns a function object that binds one or more arguments to a function object.
`function`: a class template that provides a polymorphic function wrapper.
4. Metaprogramming and type traits: This section describes several type traits and metaprogramming facilities, including:
`typetraits`: a header that provides several type traits, including `issame`, `isbaseof`, and `isconvertible`.
`enableif`: a class template that enables or disables a function or class template based on a boolean condition.
5. Numerical facilities: This section describes several numerical facilities, including:
Random number generation: a set of classes and functions that provide random number generation functionality.
* Numerical algorithms: a set of functions that provide numerical algorithms, including `accumulate` and `innerproduct`.

The document provides a detailed description of each of these sections, including the syntax, semantics, and usage of each class, function, and template. It also provides several examples and use cases to illustrate the usage of these facilities. Overall, the document provides a comprehensive overview of the C++ library extensions and their usage.