What are the key features expected in C++26

C++26, the upcoming version of the C++ standard, is expected to introduce several key features that will enhance the language's safety, usability, and performance. Here are some of the major features anticipated in C++26:

Key Features of C++26

1. Contracts

• Purpose: Implement design by contract, allowing functions to specify preconditions, postconditions, and invariants.

• Impact: Enhances code reliability by explicitly defining API contracts, reducing runtime errors.

• Example:

   

  cpp

  int f(const int x) [[pre: x != 1]] // precondition [[post(r : r != 2)]] // postcondition { contract_assert(x != 3); return x; }