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首页C++高级编程:探索Boost库的225页精华
C++高级编程:探索Boost库的225页精华
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更新于2024-06-25
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《03-Beyond the C++ Standard Library》是一本由Björn Karlsson编写的经典著作,专为中级到高级的C++开发者设计。该书于2005年8月由Addison Wesley Professional出版社发行,ISBN号码为0321133544,共432页,旨在引领读者探索C++编程的全新边界,超越标准库的局限,提升代码的优雅、健壮性和生产力。 书中系统地介绍了Boost库,这是C++编程领域的一个重要突破,为程序员提供了众多功能强大的辅助工具。Boost不仅仅是一个包含58个库的集合,而是涵盖了广泛的主题,包括智能指针、类型转换、容器和数据结构等。Karlsson深入浅出地讲解了如何通过使用这些库来优化代码,使之更加高效和易读。 作者特别关注12个关键的Boost库,它们在实际开发中极为实用,例如,他详细探讨了高阶函数对象的运用,这种技术允许开发者编写更简洁、表达力更强且易于理解的代码。此外,书中还揭示了如何利用Boost的底层工具和技术,创建自己的通用代码,让读者能够深入了解库的内部工作原理和扩展可能性。 《03-Beyond the C++ Standard Library》不仅提供了一个全面的库指南,而且是提升C++编程技能,掌握最新技术和最佳实践的重要参考书。无论是希望改进现有项目还是寻求创新解决方案的开发者,这本书都将是一个不可或缺的资源。通过阅读本书,读者将能够扩展C++语言的功能,从而在实际工作中实现更高的效率和质量。
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Function Objects and Higher-Order Programming
Boost.Bind
Bind is a generalization of the Standard Library binders, bind1st and bind2nd. The library supports binding arguments
to anything that behaves like a functionfunction pointers, function objects, and member function pointers with a
uniform syntax. It also enables functional composition by means of nested binders. This library does not have all of the
requirements that are imposed by the Standard Library binders, most notably that there is often no need to provide
the typedefs result_type, first_argument_type, and second_argument_type for your classes. This library also makes it
unnecessary to use the adaptors ptr_fun, mem_fun, and mem_fun_ref. The Bind library is thoroughly covered in "
Library 9: Bind 9." It's an important and very useful addition to the C++ Standard Library. Bind is typically used with
the Standard Library algorithms, and is often used together with Boost.Function, yielding a powerful tool for storing
arbitrary functions and function objects for subsequent invocation. Bind has been accepted for the upcoming Library
Technical Report.
The author of Bind is Peter Dimov.
Boost.Function
The Function library implements a generalized callback mechanism. It provides for the storage and subsequent
invocation of function pointers, function objects, and member function pointers. Of course, it works with binder
libraries such as Boost.Bind and Boost.Lambda, which greatly increases the number of use cases for callbacks
(including stateful callback functions). The library is covered in detail in "Library 11: Function 11." Function is typically
used where a function pointer would otherwise be employed to provide callbacks. Examples of usage are in signal/slot
implementations, separation of GUIs from business logic, and storage of heterogeneous function-like types in
Standard Library containers. Function has been accepted for the upcoming Library Technical Report.
The author of Function is Douglas Gregor.
Boost.Functional
The Functional library provides enhanced versions of the adapters in the C++ Standard Library. The major
advantage is that it helps solve the problem with references to references (which are illegal) that arise when using the
Standard Library binders with functions taking one or more arguments by reference. Functional also obviates the use
of ptr_fun for using function pointers with the Standard Library algorithms.
The author of Functional is Mark Rodgers.
Boost.Lambda
Lambda provides lambda expressionsunnamed functionsfor C++. Especially useful when using the Standard Library
algorithms, Lambda allows functions to be created at the call site, which avoids the creation of many small function
objects. Using lambdas means writing less code, and writing it in the location where it's to be used, which is much
clearer and maintainable than scattering function objects around the code base. "Library 10: Lambda 10" covers this
library in detail.
The authors of Lambda are Jaakko Järvi and Gary Powell.
Boost.Ref
Many function templates, including a large number from the Standard C++ Library, take their arguments by value,
which is sometimes problematic. It may be expensive or impossible to copy an object, or the state may be tied to a
particular instance, so copying is unwanted. In these situations, one needs a way to pass by reference rather than by
value. Ref wraps a reference to an object and turns it into an object that may be copied. This permits calling functions
taking their arguments by value with a reference. Ref has been accepted for the upcoming Library Technical Report.
The authors of Ref are Jaakko Järvi, Peter Dimov, Douglas Gregor, and David Abrahams.
Boost.Signals
Signals and slots systems, based on a pattern also known as publisher-subscriber and observer, are important tools
for managing events in a system with a minimum of dependencies. Few large applications get by without some
variation of this powerful design pattern, though typically they use proprietary implementations. Signals provides a
proven and efficient means to decouple the emission of signals (events/subjects) from the slots (subscribers/observers)
that need notification of those signals.
The author of Signals is Douglas Gregor.
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