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A Log.* namespace: five levels (trace/debug/info/warn/error), a runtime threshold, and structured key=value fields, so games get something better than scattered print calls and release builds can go quiet without touching call sites. - Log.trace/debug/info/warn/error(msg, [k, v]...) -> stderr, "[LEVEL] msg k=v" - Log.set_level(n) show only level >= n (0 = all default, 5 silences all) - Log.level() read the current threshold Fields accept strings, ints, and longs (numbers formatted automatically); the level tag is chosen at compile time so a filtered-out level costs only a comparison. Writes to stderr, never touching the simulation — no effect on determinism/replays. v1 is the console sink; rotating-file and in-engine overlay sinks are noted as follow-ups. - examples/library/logging.ludic: asserts the set_level/level threshold round-trip and that every level (with mixed-type fields) runs without faulting; the stderr gating itself was verified by hand (warn/error emit, lower levels suppressed). Wired into `x test` (now 53 passed). - docs: a new Log section + per-symbol pages; inventory and coverage pass. - seed regenerated; `x bootstrap-cfree` fixpoint holds. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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| id | name | category | kind | tokens | sig | tip | order | ns | member |
|---|---|---|---|---|---|---|---|---|---|
| log-set_level | Log.set_level | log | namespace-method | Log.set_level | Log.set_level(n) -> void | Show only messages at level n or above (0 = all). | 6 | Log | set_level |
Sets the logging threshold: only messages whose level is n or higher are written; everything below is silently dropped. The levels are trace 0, debug 1, info 2, warn 3, error 4, so set_level(3) shows only warnings and errors, and the default of 0 shows everything. Set it once at startup — low in development, high (3, or 5 to silence all) for release — and every call site adjusts automatically. Read the current value back with Log.level.
Parameters:
n— the minimum level to show (0–4; use 5 to silence every level)
program Quiet {
entry {
Log.set_level(3) # warnings and errors only
Log.info("startup") # dropped
Log.warn("low memory") # shown
}
}