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feat(stdlib): DateTime format/parse + simulated Clock — completes #9
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Finish issue #9 by adding the two remaining acceptance items on top of the
calendar/clock core, still pure-integer and deterministic:

  DateTime.format(dt, pattern) -> string   render an instant via a token
                                           pattern (YYYY/YY/MM/DD/HH/mm/ss;
                                           other chars pass through)
  DateTime.parse(text, pattern) -> int     read an instant back; -1 on a
                                           non-digit where one is expected
  Clock.now/set/advance/reset              a game-controlled simulated clock
                                           (the @L_clock global) that never
                                           touches the wall clock, so gameplay
                                           reading Clock.now() is replay-safe

format/parse take a string-LITERAL pattern and are expanded at compile time
(field offsets are then constant), folding @fn_str_concat over literal runs and
two small runtime helpers: @fn_dt_pad0 (zero-padded field) and @fn_dt_rd
(fixed-width digit reader that stops at the terminator and flags malformed
input). Clock is a universal i32 global declared in emit_head, so it works in
entry and game programs alike.

Adds examples/offline_rewards.ludic — the issue's worked "you were away N hours"
example, driven from its own entry and asserted in the regression suite — plus
selfhost/tests/datetime2.ludic (format/parse round-trip, parse failure, clock),
docs (Clock section + 4 pages, DateTime.format/parse pages), inventory and LSP
hover. Reseeded; C-free fixpoint holds; all suites green (27 self-host / 46
regression / 29 tools); check.py (366 symbols), check-impl.py (218 ns-methods)
and validate.py OK.

With this, #9's scope is fully delivered: DateTime/Date/Duration + core ops,
format/parse, a deterministic simulated clock, docs + offline-rewards example,
and tests. (v1 stays UTC-only, no leap seconds, i32 epoch valid through 2038.)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
Orkun ÇAKILKAYA 2026-08-30 03:51:48 +03:00
parent 1a2c6ec2c7
commit b5455cd550
17 changed files with 13902 additions and 12278 deletions
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8
tools/ludic-tools/lsp.ludic
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@ -1436,6 +1436,14 @@ program LudicLsp {
if (meth == "hour") { return "DateTime.hour(dt) -> int" }
if (meth == "minute") { return "DateTime.minute(dt) -> int" }
if (meth == "second") { return "DateTime.second(dt) -> int" }
if (meth == "format") { return "DateTime.format(dt, pattern) -> string" }
if (meth == "parse") { return "DateTime.parse(text, pattern) -> int" }
}
if (ns == "Clock") {
if (meth == "now") { return "Clock.now() -> int" }
if (meth == "set") { return "Clock.set(t)" }
if (meth == "advance") { return "Clock.advance(span)" }
if (meth == "reset") { return "Clock.reset()" }
}
if (ns == "Memory") {
if (meth == "bytes") { return "Memory.bytes(n) -> pointer" }