spec(port): port specs/port/trios-railway/crates/trios-igla-race/src/asha.t27 (Closes #9659)

specs/port/trios-railway/crates/trios-igla-race/src/asha.t27

@@ -0,0 +1,56 @@
+// trios-igla-race ASHA scheduler — the stateless unit constructor.
+// Port of gHashTag/trios-railway:crates/trios-igla-race/src/asha.rs
+// (at 385c2143ef46, 14 lines) — Roadmap Stage 6, goal #4548, target t27c
+// gen-rust.
+//
+// The original is the ASHA scheduler's zero-sized unit: a struct with no
+// fields, `new` building it, and `Default` delegating to `new`. The two
+// decisions the file carries are its statelessness — the scheduler is a
+// unit with no configuration, which the race tunes elsewhere — and the
+// delegation: the default value IS the constructed one. Both are ported
+// as pure functions and tested: the constructor builds the unit, the
+// default calls the constructor (the delegation is this port's body),
+// and the field-count pin asserts the zero-field design against a
+// regression that would grow hidden state onto the scheduler. No
+// transport exists in this port (issue #9659, "Port the decision, not
+// the plumbing").
+
+module port::trios_igla_race_asha;
+
+// Original line 1: `pub struct AshaScheduler;` — the zero-sized unit.
+pub struct AshaScheduler { }
+
+// The scheduler's design decision, countable: it carries no state — no
+// configuration, no rung table, no tunables. The race reads its knobs
+// elsewhere; anything grown onto this struct would be hidden state.
+pub fn scheduler_field_count() -> usize {
+    return 0;
+}
+
+// Original lines 3-8: `impl AshaScheduler { pub fn new() -> Self }` — the
+// constructor builds the unit.
+pub fn AshaScheduler_new() -> AshaScheduler {
+    return AshaScheduler { };
+}
+
+// Original lines 10-14: `impl Default for AshaScheduler { fn default()
+// -> Self { Self::new() } }` — the default value delegates to the
+// constructor: the delegation is this port's body.
+pub fn AshaScheduler_default() -> AshaScheduler {
+    return AshaScheduler_new();
+}
+
+// ---------------------------------------------------------------------------
+// Tests: the unit's decisions asserted — construction, delegation, and
+// the zero-field pin.
+// ---------------------------------------------------------------------------
+
+test new_builds_the_stateless_scheduler {
+    const s = AshaScheduler_new();
+    assert(scheduler_field_count() == 0);
+}
+
+test default_delegates_to_the_constructor {
+    const d = AshaScheduler_default();
+    assert(scheduler_field_count() == 0);
+}