Structs and impl

struct is Silk’s primary record type: named fields stored together as one value. impl blocks attach methods (and special methods like constructor and drop) to a type.

Full reference: structs impls layout.

Notes#

• Supported forms + layout model: structs impls layout

Syntax#

struct Point {
  x: int,
  y: int,
}

impl Point {
  public fn sum (self: &Point) -> int {
    return self.x + self.y;
  }
}

Examples#

Example: struct literal + method call#

struct Point {
  x: int,
  y: int,
}

impl Point {
  public fn add (self: &Point, other: Point) -> Point {
    return Point{
      x: self.x + other.x,
      y: self.y + other.y,
    };
  }
}

fn main () -> int {
  let p: Point = Point{ x: 1, y: 2 };
  let q: Point = Point{ x: 3, y: 4 };
  let r: Point = p.add(q);
  return r.x + r.y; // 10
}

See also#

• Full reference: structs impls layout
• Mutability and mut &T: mutability
• Enums and matching: enums, flow match