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Enforce consistent formatting use `dprint`
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Luca Palmieri
2024-05-24 17:00:03 +02:00
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book/src/03_ticket_v1/04_visibility.md
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@@ -1,12 +1,12 @@
# Visibility
When you start breaking down your code into multiple modules, you need to start thinking about **visibility**.
When you start breaking down your code into multiple modules, you need to start thinking about **visibility**.
Visibility determines which regions of your code (or other people's code) can access a given entity,
be it a struct, a function, a field, etc.
## Private by default
By default, everything in Rust is **private**.
By default, everything in Rust is **private**.\
A private entity can only be accessed:
1. within the same module where it's defined, or
@@ -16,16 +16,16 @@ We've used this extensively in the previous exercises:
- `create_todo_ticket` worked (once you added a `use` statement) because `helpers` is a submodule of the crate root,
where `Ticket` is defined. Therefore, `create_todo_ticket` can access `Ticket` without any issues even
though `Ticket` is private.
- All our unit tests are defined in a submodule of the code they're testing, so they can access everything without
restrictions.
though `Ticket` is private.
- All our unit tests are defined in a submodule of the code they're testing, so they can access everything without
restrictions.
## Visibility modifiers
You can modify the default visibility of an entity using a **visibility modifier**.
You can modify the default visibility of an entity using a **visibility modifier**.\
Some common visibility modifiers are:
- `pub`: makes the entity **public**, i.e. accessible from outside the module where it's defined, potentially from
- `pub`: makes the entity **public**, i.e. accessible from outside the module where it's defined, potentially from
other crates.
- `pub(crate)`: makes the entity public within the same **crate**, but not outside of it.
- `pub(super)`: makes the entity public within the parent module.
@@ -46,4 +46,4 @@ The `active` field, instead, is private and can only be accessed from within the
## References
- The exercise for this section is located in `exercises/03_ticket_v1/04_visibility`
- The exercise for this section is located in `exercises/03_ticket_v1/04_visibility`