M_with_make.Adtmodule Cons : sig ... endThis module defines the interface for creating ADT constructors.
The abstract type representing a defined Algebraic Data Type, encapsulating its sort and associated functions (constructors, selectors, and testers).
make name constructors defines a new ADT with the given name and a list of constructors (of type Cons.t). This returns the ADT definition t.
constructor name adt retrieves the constructor function declaration (e.g., Cons) with the given name from the ADT adt, if it exists.
selector name adt retrieves the selector function declaration (e.g., field_a) with the given name from the ADT adt, if it exists.