Modern C++ Programming Cookbook

How to do it...

To uniformly initialize objects regardless of their type, use the brace-initialization form {} that can be used for both direct initialization and copy initialization. When used with brace initialization, these are called direct list and copy list initialization.

    T object {other};   // direct list initialization     T object = {other}; // copy list initialization

Examples of uniform initialization are as follows:

• Standard containers:

        std::vector<int> v { 1, 2, 3 };        std::map<int, std::string> m { {1, "one"}, { 2, "two" }};

• Dynamically allocated arrays:

        int* arr2 = new int[3]{ 1, 2, 3 };    

• Arrays:

        int arr1[3] { 1, 2, 3 }; 

• Built-in types:

        int i { 42 };        double d { 1.2 };    

• User-defined types:

        class foo        { int ...