Rust Type

• Primitive types:
  • Boolean — bool
  • Numeric — integer and float
  • Textual — char and str
  • Never — ! — a type with no values
• Sequence types:
  • Tuple
  • Array
  • Slice
• User-defined types:
  • Struct
  • Enum
  • Union
• Function types:
  • Functions
  • Closures
• Pointer types:
  • References
  • Raw pointers
  • Function pointers
• Trait types:
  • Trait objects
  • Impl trait
• Rust String
• usize: sizeof pointer
• Owned Types
  • variables that contain the actual values they represent
  • move types
• Borrowed Types
  • addresses of the values they represent

Type alias

Replace empty struct with type alias

type Kilometers = i32;
 
let x: i32 = 5;
let y: Kilometers = 5;
 
println!("x + y = {}", x + y);

Links

Types - The Rust Reference