class

Declares a class: a named heap type with fields, constructed with new.

Fields are name: Type, private unless marked pub; const fields are set only by the constructor and static fields belong to the class. Methods go in an impl block. A class can be generic and can declare an invariant.

class Account {
    pub owner: string,
    balance: int,
}

impl Account {
    pub fn deposit(int amount) {
        self.balance = self.balance + amount;
    }
}

fn main() {
    let a = new Account("ada", 0);
    a.deposit(10);
}

See also#

• fn: Declares a function, a method, or (written in an expression) an anonymous function.
• let: Declares a mutable local variable.
• const: Declares a binding that cannot be reassigned: a local, a module constant, or a class field that is set only by new.
• static: Declares a module-level or class-level slot shared by the whole program, or a method without self.
• readonly: A read-only view of a value: nothing reachable through it can be changed.
• if: Runs a block when a bool condition is true.
• else: Introduces the branch of an if that runs when its condition is false (or its pattern does not match).
• while: Repeats a block while a bool condition is true.