Initialization

Lecture 2 - Slide 25 : 29

Initialization

C++ supports several different notations and mechanisms for initialization

The C++ Prog. Lang. (4. edition): Page 159

Effective Modern C++: Distinguish between () and {} when creating objects. Item 7

  T v1 = v;    // C style initialization.
  T v2 = {v};  // C style List initialization.
  T v3(v);     // Constructor style initialization.
  T v4{v};     // Universal initialization, without narrowing. Preferred.
  T v5{};      // Default initialization. For user-defined types, use parameterless constructor.

Array initialization in C
Struct initialization in C

New style universal initialization - with {}
- Can be used (almost) everywhere
- Generalizes the notation used for initialization of arrays and structs in C
- Can also be used for passing parameters to constructors
  - Although with some ambiguities, forcing the use of old-style initialization (!!)