ludic/packages/ludic.base/tests/queue_test.ludic
Orkuncakilkaya 71735b10a2 feat(base): 0.R4 - a queue keeps its own count, so every package verb takes only its own state; ludic migrate state --prune
ludic.base's Queue<T> carries a QueueTag (its name and pending count): queue_new(name), q_push(q, v),
q_drain(q), q_clear(q) take no BaseState, and core_undrained(tags) names the given queues still holding
facts. A reducer on a package's state can now call that package's verbs (wallet_earn(wallet_st, n)).

ludic migrate state --prune (ludicc --migrate-prune) takes out each state parameter a function no
longer uses, nor anything it calls, and the argument that fills it - including an argument for a
parameter the callee has dropped, which is taken out before the call is checked, so a generic's T is
told by the argument that says it. A reducer keeps its state. --dry-run now counts the edits it would
make. Every package was moved with it: 608 base_st parameters and their arguments, 1889 edits.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-09-26 04:19:56 +03:00

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# queue_test.ludic - Queue<T>: first in first out, drain empties, undrained queues are named.
# A generic call is not resolved inside a `test` body yet, so each case is a function.
import "ludic.base"
program QueueTest {
numbers float
property Caught { species: int = 0, weight: float = 0.0 }
function caught(sp: int, w: float) -> Caught {
let c = new Caught
c.species = sp
c.weight = w
return c
}
function fifo_case() -> void {
let q: Queue<int> = queue_new("ints")
q_push(q, 3)
q_push(q, 1)
q_push(q, 2)
expect_eq(q_len(q), 3)
let xs = q_drain(q)
expect_eq(len(xs), 3)
expect_eq(xs[0], 3)
expect_eq(xs[1], 1)
expect_eq(xs[2], 2)
expect_eq(q_len(q), 0)
expect_eq(len(q_drain(q)), 0)
}
function record_case() -> void {
let q: Queue<Caught> = queue_new("caught")
q_push(q, caught(2, 1.5))
q_push(q, caught(4, 0.25))
let cs = q_drain(q)
expect_eq(cs[1].species, 4)
expect(cs[0].weight == 1.5)
}
function clear_case() -> void {
let q: Queue<string> = queue_new("words")
q_push(q, "a")
q_clear(q)
expect_eq(q_len(q), 0)
}
# nothing but the queue says what T is: a drain and a clear still know it
function infer_case() -> void {
let q: Queue<Caught> = queue_new("told")
q_push(q, caught(1, 2.0))
expect_eq(q_drain(q)[0].species, 1)
q_push(q, caught(3, 1.0))
q_clear(q)
expect_eq(q_len(q), 0)
}
function undrained_case() -> void {
let a: Queue<int> = queue_new("left_behind")
let b: Queue<int> = queue_new("read")
q_push(a, 1)
q_push(b, 2)
q_drain(b)
let tags = [q_tag(a), q_tag(b)]
let names = core_undrained(tags)
expect_eq(len(names), 1)
expect(names[0] == "left_behind")
q_drain(a)
expect_eq(len(core_undrained(tags)), 0)
}
test "a queue drains in the order it was pushed" () { fifo_case() }
test "a queue holds records" () { record_case() }
test "clear drops what is waiting" () { clear_case() }
test "a queue's element type is told by the queue alone" () { infer_case() }
test "the undrained queues are named, and a drain clears the report" () { undrained_case() }
}