Skip to content
Related Articles

Related Articles

Trivial classes in C++

Improve Article
Save Article
  • Difficulty Level : Hard
  • Last Updated : 08 Aug, 2017
Improve Article
Save Article

When a class or struct in C++ has compiler-provided or explicitly defaulted special member functions, then it is a trivial type. It occupies a contiguous memory area. It can have members with different access specifiers.

Trivial types have a trivial default constructor, trivial copy constructor, trivial copy assignment operator and trivial destructor. In each case, trivial means the constructor/ operator/ destructor is not user-provided and belongs to a class that has :

  • No virtual functions or virtual base classes,
  • No base classes with a corresponding non-trivial constructor/operator/destructor
  • No data members of class type with a corresponding non-trivial constructor/operator/destructor

The following examples show trivial types :

/*Since there are no explicit constructors,
there exists a default constructor*/
struct Trivial {
    int i;
    int j;
/* In Trivial2 structure, the presence of the 
   Trivial2(int a, int b) constructor requires
   that you provide a default constructor. For 
   the type to qualify as trivial, we must  
   explicitly default that constructor.*/
struct Trivial2 {
    int i;
    Trivial2(int a, int b)
        i = a;
    Trivial2() = default;

Reference :

This article is contributed by Rohit Thapliyal. If you like GeeksforGeeks and would like to contribute, you can also write an article using or mail your article to See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above.

My Personal Notes arrow_drop_up
Related Articles

Start Your Coding Journey Now!