rust-type-driven

Solution Patterns

Pattern 1: Newtype Pattern

// ❌ Primitive types can be confused
fn process_user(id: u64) { ... }
fn process_order(id: u64) { ... }

// Easy to mix up:
process_order(user_id);  // Compiles but wrong!

// ✅ Type-safe newtypes
struct UserId(u64);
struct OrderId(u64);

fn process_user(id: UserId) { ... }
fn process_order(id: OrderId) { ... }