All C++20 core language features with examples(oleksandrkvl.github.io)

  npm install react 

  go: finding rsc.io/quote v1.5.2
  go: downloading rsc.io/quote v1.5.2

  void ptr_add(int *f) {
    *f += 5;
  }

  void val_add(int f) {
    f += 5;   // only changes local copy of f
  }

  void ref_add(int &f) {
    f += 5;
  }

  int main() {
    int foo = 42;
    ptr_add(&foo);  // foo is now 47
    val_add(foo);   // foo is still 47
    ref_add(foo);   // foo is now 52
  }

    [intro.structure]
    Clause 5 through Clause 15 describe the C++ programming language. 
    That description includes detailed syntactic specifications in a form described in 4.3. 
    For convenience, Annex A repeats all such syntactic specifications.

    Clause 17 through Clause 32 and Annex D (the library clauses) describe the C++ standard library. 
    That description includes detailed descriptions of the entities and macros that constitute the library, in a form described in Clause 16.