Regions (with)

Regions provide a fixed-size, statically allocated backing store that can be used as an allocation context for new.

Full reference: regions.

Notes#

• Supported forms + Limitations: regions

Syntax#

const region region_buf: u8[1024];

with region_buf {
  // `new` allocations use `region_buf` as backing storage.
}

Example#

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

fn main () -> int {
  const region region_buf: u8[1024];
  with region_buf {
    let p: &Point = new Point{ x: 1, y: 2 };
    return p.x + p.y;
  }
}

See also#

• Full reference: regions
• Memory model and new: memory model
• --noheap and std::runtime::mem: runtime