flan/test/programs/dev-loop.flan
Joseph Ferano 96ab4c9cf0 Retire the per-type printers, since print says all of it
print-str, print-i64, print-f64, print-bytes, print-line and newline leave
the prelude. print and println are the whole printing surface now, and print
is the better call at every one of the sites that used them: it is the same
structural walk without the newline, so the no-newline case the family was
kept for is covered, and it takes the value as it is. The old print-i64
forced an explicit (i64 x) at every call site, because this language widens
nothing implicitly; that cast is gone from 127 places.

Dropping it moves one answer. hash-grid returns u64, and the cast through
the signed printer showed sand-headless's hash as -2851001042534928384.
print routes a u64 through flan_u64_to_bytes, so it now prints
15595743031174623232 — the same 64 bits, read as the unsigned number they
are. The pinned expectation follows the correction.

test-flan-dev.el and test_session.ml both reached for print-line as "a name
the prelude has"; they reach for rand-seed instead.
2026-09-12 05:32:25 +07:00

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;;;; What [flan dev] launches: a program with a loop, a function to redefine,
;;;; and a way to stop. The daemon overrides the socket path through the
;;;; environment, so the one written here is only what it falls back to.
(import agent "vendor:agent")
(defvar ticks i64)
;;; A condition and something that signals it, so that a body typed in later
;;; can establish a handler and transfer past this frame — spec-conditions.md
;;; §6. It is here rather than in the evaluated form on purpose: the guard that
;;; forwards the transfer has to be one the *host* was compiled with.
(defstruct Missing [id i32])
(defn probe [] i64
(signal (Missing {:id 1}))
0)
(defn step [] i64
(set ticks (+ ticks 1))
ticks)
(defn main [] i32
(agent/start "/tmp/flan-dev-fallback.sock")
(print (step)) (println "")
(while (= (agent/wait 100) 0) 0)
(print (step)) (println "")
(while (= (agent/wait 100) 0) 0)
(print (step)) (println "")
(while (= (agent/wait 100) 0) 0)
(print (step)) (println "")
0)