CAT 015

CAT-015 — Struct vs Class heuristic

Field	Value
Severity	info
Confidence	medium
Auto-fix	❌

Struct vs Class heuristic — Using class for small value objects allocates on the heap. Prefer struct for immutable, small data objects.

Bad code

class Point
  getter x, y
  def initialize(@x : Int32, @y : Int32); end
end