12 2021 档案

Effective C++ 笔记 —— Item 43: Know how to access names in templatized base classes.
摘要：Suppose we need to write an application that can send messages to several different companies. Messages can be sent in either encrypted or cleartext ( 阅读全文
posted @ 2021-12-10 18:26 MyCPlusPlus 阅读(50) 评论(0) 推荐(0)
Effective C++ 笔记 —— Item 42: Understand the two meanings of typename.
摘要：Question: what is the difference between class and typename in the following template declarations? template<class T> class Widget; // uses "class" te 阅读全文
posted @ 2021-12-10 11:17 MyCPlusPlus 阅读(51) 评论(0) 推荐(0)
Effective C++ 笔记 —— Item 41: Understand implicit interfaces and compile-time polymorphism.
摘要：Look what happens when we turn doProcessing from a function into a function template: void doProcessing(Widget& w) { if (w.size() > 10 && w != someNas 阅读全文
posted @ 2021-12-09 10:04 MyCPlusPlus 阅读(54) 评论(0) 推荐(0)
Effective C++ 笔记 —— Item 40: Use multiple inheritance judiciously.
摘要：Multiple inheritance just means inheriting from more than one base class, but it is not uncommon for MI to be found in hierarchies that have higher-le 阅读全文
posted @ 2021-12-07 17:17 MyCPlusPlus 阅读(61) 评论(0) 推荐(0)
Effective C++ 笔记 —— Item 39: Use private inheritance judiciously.
摘要：Item 32 demonstrates that C++ treats public inheritance as an is-a relationship. It does this by showing that compilers, when given a hierarchy in whi 阅读全文
posted @ 2021-12-03 18:04 MyCPlusPlus 阅读(162) 评论(0) 推荐(0)
Effective C++ 笔记 —— Item 38: Model "has-a" or "is-implemented-in-terms-of" through composition.
摘要：Item 32 explains that public inheritance means "is-a." Composition has a meaning, too. Actually, it has two meanings. Composition means either "has-a" 阅读全文
posted @ 2021-12-03 18:03 MyCPlusPlus 阅读(59) 评论(0) 推荐(0)
Makefile 语法笔记
摘要：1. 赋值运算符的辨析： = 基本的赋值:= 覆盖之前的值?= 如果没有被赋值过,就赋予等号后面的值+= 添加等号后面的值 注意： make会将整个 makefile 展开后，再决定变量的值，例如： x = foo y = $(x) bar x = xyz 这个例子中，y的值将会是 xyz bar  阅读全文
posted @ 2021-12-02 16:33 MyCPlusPlus 阅读(42) 评论(0) 推荐(0)