1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
//! Per-domain sealed-trait pattern.
//!
//! Each `*Sealed` trait gates a single category of public marker trait so
//! that downstream crates cannot impl that category directly. Splitting
//! the seals (rather than using one shared `Sealed`) lets the
//! `define_vehicle!` / `define_planet!` macros open exactly the
//! `Vehicle` and `Planet` catalogs (via the `__macro_support`
//! re-export) while keeping `Frame`, `TimeScale`, `Layout`, and
//! `Transform` closed at the type-system level.
//!
//! - `FrameSealed`: gates `Frame` impls. Closed.
//! - `TimeScaleSealed`: gates `TimeScale` impls. Closed.
//! - `QuatSealed`: gates `Layout` and `Transform` impls. Closed.
//! - `VehicleSealed`: gates `Vehicle` impls. Re-exported via
//! `__macro_support` so `define_vehicle!` can satisfy the bound from
//! downstream call sites. Convention-sealed: only the macro should
//! produce impls.
//! - `PlanetSealed`: gates `Planet` impls. Same treatment as
//! `VehicleSealed`.
/// Sealed-trait bound for [`crate::frame::Frame`] impls. Closed —
/// downstream crates cannot impl this trait, so they cannot impl
/// `Frame` either.
/// Sealed-trait bound for [`crate::frame::Vehicle`] impls. Re-exported
/// via `__macro_support` so the `define_vehicle!` macro can satisfy
/// the bound from downstream call sites. Convention-sealed: only the
/// macro should produce impls.
/// Sealed-trait bound for [`crate::frame::Planet`] impls. Re-exported
/// via `__macro_support` so the `define_planet!` macro can satisfy the
/// bound from downstream call sites. Convention-sealed: only the macro
/// should produce impls.
/// Sealed-trait bound for [`crate::time_scale::TimeScale`] impls.
/// Closed — downstream crates cannot impl this trait.
/// Sealed-trait bound for [`crate::quat::Layout`] and
/// [`crate::quat::Transform`] impls. Closed — the four standing
/// quaternion conventions are exhaustive.