Initialization

C++ 的初始化方式可以分成很多種， 七種 Initializer ：

  • Default initialization

  • Value initialization, e.g. std::string s{};

  • Direct initialization, e.g. std::string s(“hello”);

  • Copy initialization, e.g. std::string s = “hello”;

  • List initialization, e.g. std::string s{‘a’, ‘b’, ‘c’};

  • Aggregate initialization, e.g. char a[3] = {‘a’, ‘b’};

  • Reference initialization, e.g. char& c = a[0];

兩種 Static initialization：

  1. Static initialization

  2. Dynamic initialization

兩種 Dynamic non-local initialization：

  1. Ordered dynamic initialization

  2. Unordered dynamic initialization

兩種 Class member initialization：

  1. Member initializer list

  2. in-class brace-or-equal initializer

Reference