In C++ you have economy-class functions, business-class functions, and first-class functions, all with varying degrees of comfort, space, privacy, and onboard service…no, of course that’s not what the term first-class means.1 Let’s start over:
In computer science, a programming language is said to offer first-class functions if it allows you to treat functions like any other variable. In such a language, for instance, you can assign a function as a value to a variable, just like you would an integer or a string. ...
