© The Author(s), under exclusive license to APress Media, LLC, part of Springer Nature 2022
C. MilanesiBeginning Rusthttps://doi.org/10.1007/978-1-4842-7208-4_18

18. Data Encapsulation

Carlo Milanesi1  
(1)
Bergamo, Italy
 
In this chapter, you will learn:

  • Why the dot notation for calling a function is more convenient than the functional notation

  • How to use the impl and self keywords to declare functions that can be invoked using the dot notation

  • How to encapsulate function declarations in modules, selecting which functions declared in a module should be accessible from other modules

  • How to create a hierarchy of modules, and how to access any function in such hierarchy

  • How to define type aliases

The Need for Methods

We already saw that there are two possible ...

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