可移植的 C++ 标准库 Boost 1.67.0 beta 1 版本发布，Boost 库是一个经过千锤百炼、可移植、提供源代码的 C++ 库，作为标准库的后备，是 C++ 标准化进程的发动机之一，由 C++ 标准委员会库工作组成员发起。 新增的库 Contract:Contract programming for C++. All contract programming features are supported: Subcontracting, class invariants, postconditions (with old and return values), preconditions, customizable actions on assertion failure (e.g., terminate or throw), optional compilation and checking of assertions, etc, from Lorenzo Caminiti. HOF:Higher-order functions for C++, from Paul Fultz II. 更新的库 Asio: Added experimental::detached completion token. Added experimental::redirect_error completion token. Added experimental::co_spawn facility for integration with the coroutines technical specification. Added missing const qualifier to basic_socket_acceptor::get_option. Worked around a parsing error that occurs with some versions of gcc. Fixed broken code samples in tutorial. Added new experimental features. (Note that "experimental" features may be changed without notice in subsequent releases.) 详情请查看更新日志。 下载地址：https://dl.bintray.com/boostorg/beta/1.67.0.beta.1/binaries/ 可移植的 C++ 标准库 Boost 1.67.0 beta 1 发布下载地址
