OCaml supports modules, which can be used to express a more seamless composition of types. This is similar to the concept of struct embedding in some other languages.
To run the program, save it as struct_composition.ml and use the OCaml compiler:
In this OCaml version, we use records to represent structs. The concept of embedding is achieved by including the base record as a field in the container record.
We define functions that operate on these records, similar to methods in object-oriented languages. The describe function is defined for the base type.
To simulate the interface implementation, we use OCaml’s module system. We define a module signature Describer (similar to an interface) and create a module ContainerDescriber that implements this signature.
The main function demonstrates how to create and use these structures, access their fields, and use the module system to achieve polymorphism.
This example showcases OCaml’s powerful type system and module system, which provide ways to achieve composition and polymorphism similar to struct embedding in other languages.