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# CPP-Templates-2nd
* C++ [模板](https://en.cppreference.com/w/cpp/language/templates)技术是泛型编程的核心,但囿于编译器技术限制,不得不带着缺陷诞生,语法晦涩,报错冗长,难以调试,应用层开发较少使用,相关技术书籍匮乏,因此掌握难度较大。模板相关的经典技术书籍主要有三本,分别是 2001 年出版的 [*Modern C++ Design*](https://book.douban.com/subject/1755195/)、2002 年出版的 [*C++ Templates*](https://book.douban.com/subject/1455780/)、2004 年出版的 [*C++ Template Metaprogramming*](https://book.douban.com/subject/1920800/)。三者基于的 C++ 标准都是 C++98,*Modern C++ Design* 涉及 [Andrei Alexandrescu](https://en.wikipedia.org/wiki/Andrei_Alexandrescu) 写书时配套的 [Loki](http://loki-lib.sourceforge.net/),*C++ Template Metaprogramming* 涉及 [Boost](https://www.boost.org/),二者以介绍元编程(模板技术的一种应用)为主,只有 *C++ Templates* 主要介绍 C++98 标准的模板技术。时过境迁,C++ 标准的更新逐步修复了一些语法缺陷,减少了使用者的心智负担,并引入了语法糖和工具,让编写模板越来越简单。2017 年 9 月 25 日,基于 C++17 标准,[*C++ Templates 2ed*](https://book.douban.com/subject/11939436/) 出版,填补了十多年间模板技术进化时相关书籍的空白,堪称最全面的模板教程,也是对 C++11/14/17 特性介绍最为全面的书籍之一。个人完整学习[原书](https://www.safaribooksonline.com/library/view/c-templates-the/9780134778808/)后,梳理精简章节脉络,补充 C++20 相关特性,如 [concepts](https://en.cppreference.com/w/cpp/concepts)、支持模板参数的 [lambda](https://en.cppreference.com/w/cpp/language/lambda) 等,运行验证所有代码结果,最终记录至此。

## Contents

1. [Function template](https://github.com/downdemo/Cpp-Templates-2ed/blob/master/docs/01_function_template.md)
2. [Class template](https://github.com/downdemo/Cpp-Templates-2ed/blob/master/docs/02_class_template.md)
3. [Non-type template parameter](https://github.com/downdemo/Cpp-Templates-2ed/blob/master/docs/03_non_type_template_parameter.md)
4. [Variadic template](https://github.com/downdemo/Cpp-Templates-2ed/blob/master/docs/04_variadic_template.md)
5. [Move semantics and perfect forwarding](https://github.com/downdemo/Cpp-Templates-2ed/blob/master/docs/05_move_semantics_and_perfect_forwarding.md)
6. [Name lookup](https://github.com/downdemo/Cpp-Templates-2ed/blob/master/docs/06_name_lookup.md)
7. [Instantiation](https://github.com/downdemo/Cpp-Templates-2ed/blob/master/docs/07_instantiation.md)
8. [Template argument deduction](https://github.com/downdemo/Cpp-Templates-2ed/blob/master/docs/08_template_argument_deduction.md)
9. [Specialization and overloading](https://github.com/downdemo/Cpp-Templates-2ed/blob/master/docs/09_specialization_and_overloading.md)
10. [Traits](https://github.com/downdemo/Cpp-Templates-2ed/blob/master/docs/10_traits.md)
11. [Inheritance](https://github.com/downdemo/Cpp-Templates-2ed/blob/master/docs/11_inheritance.md)
12. [Type erasure](https://github.com/downdemo/Cpp-Templates-2ed/blob/master/docs/12_type_erasure.md)
13. [Metaprogramming](https://github.com/downdemo/Cpp-Templates-2ed/blob/master/docs/13_metaprogramming.md)
14. [Expression template](https://github.com/downdemo/Cpp-Templates-2ed/blob/master/docs/14_expression_template.md)
15. [Debugging](https://github.com/downdemo/Cpp-Templates-2ed/blob/master/docs/15_debugging.md)
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