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2021年9月28日

Effective C++ 笔记 —— Item 36: Never redefine an inherited non-virtual function.

摘要： Consider: class B { public: void mf(); // ... }; class D : public B { /*...*/ }; D x; // x is an object of type D B *pB = &x; // get pointer to x pB-> 阅读全文

posted @ 2021-09-28 20:49 MyCPlusPlus 阅读(28) 评论(0) 推荐(0) 编辑

Effective C++ 笔记 —— Item 35: Consider alternatives to virtual functions.

摘要： The Template Method Pattern via the Non-Virtual Interface Idiom: class GameCharacter { public: int healthValue() const // derived classes do not redef 阅读全文

posted @ 2021-09-28 20:34 MyCPlusPlus 阅读(100) 评论(0) 推荐(0) 编辑

Effective C++ 笔记 —— Item 34: Differentiate between inheritance of interface and inheritance of implementation.

摘要： The seemingly straightforward notion of (public) inheritance turns out, upon closer examination, to be composed of two separable parts: inheritance of 阅读全文

posted @ 2021-09-28 11:35 MyCPlusPlus 阅读(36) 评论(0) 推荐(0) 编辑

2021年9月14日

Effective C++ 笔记 —— Item 33: Avoid hiding inherited names.

摘要： C++'s name-hiding rules do just that: hide names. Whether the names correspond to the same or different types is immaterial. int x; // global variable 阅读全文

posted @ 2021-09-14 10:38 MyCPlusPlus 阅读(93) 评论(0) 推荐(0) 编辑

2021年9月13日

Effective C++ 笔记 —— Item 32: Make sure public inheritance models "is-a."

摘要： Consider this code: class Rectangle { public: virtual void setHeight(int newHeight); virtual void setWidth(int newWidth); virtual int height() const; 阅读全文

posted @ 2021-09-13 10:50 MyCPlusPlus 阅读(38) 评论(0) 推荐(0) 编辑

2021年9月10日

Effective C++ 笔记 —— Item 31: Minimize compilation dependencies between files.

摘要： C++ doesn't do a very good job of separating interfaces from implementations. A class definition specifies not only a class interface but also a fair 阅读全文

posted @ 2021-09-10 18:09 MyCPlusPlus 阅读(81) 评论(0) 推荐(0) 编辑

Effective C++ 笔记 —— Item 30: Understand the ins and outs of inlining.

摘要： When you inline a function, you may enable compilers to perform context-specific optimizations on the body of the function. Most compilers never perfo 阅读全文

posted @ 2021-09-10 14:32 MyCPlusPlus 阅读(77) 评论(0) 推荐(0) 编辑

Effective C++ 笔记 —— Item 29: Strive for exception-safe code.

摘要： Suppose we have a class for representing GUI menus with background images. The class is designed to be used in a threaded environment, so it has a mut 阅读全文

posted @ 2021-09-10 11:12 MyCPlusPlus 阅读(63) 评论(0) 推荐(0) 编辑

2021年9月9日

Effective C++ 笔记 —— Item 28: Avoid returning "handles" to object internals.

摘要： Suppose you’re working on an application involving rectangles. Each rectangle can be represented by its upper left corner and its lower right corner. 阅读全文

posted @ 2021-09-09 19:57 MyCPlusPlus 阅读(44) 评论(0) 推荐(0) 编辑

Effective C++ 笔记 —— Item 27: Minimize casting.

摘要： Let’s begin with a review of casting syntax, because there are usually three different ways to write the same cast. C-style casts look like this: (T) 阅读全文

posted @ 2021-09-09 18:00 MyCPlusPlus 阅读(43) 评论(0) 推荐(0) 编辑

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