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feat(stdlib): DateTime format/parse + simulated Clock — completes #9
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>
2026-08-30 03:51:48 +03:00
..
annotations refactor(lang): rename the ptr/ptrs types to pointer/pointers 2026-08-30 01:58:54 +03:00
builtins refactor(lang): rename builtins flr->floor and fx->fixed 2026-08-30 02:01:56 +03:00
clock feat(stdlib): DateTime format/parse + simulated Clock — completes #9 2026-08-30 03:51:48 +03:00
collision refactor(stdlib): de-abbreviate namespaces (Mem/Sys/Net/Collide) 2026-08-30 01:30:47 +03:00
color feat(stdlib): namespaced standard library (issue #2) 2026-08-30 00:26:19 +03:00
colors docs: add Networking section + process/OS builtins (net_send, owner, is_server, serialize/apply, arg, exit, run, getenv, read_char, file_*) 2026-08-29 16:39:29 +03:00
control feat(stdlib): namespaced standard library (issue #2) 2026-08-30 00:26:19 +03:00
date feat(stdlib): Time/Date/Duration calendar-clock core (issue #9) 2026-08-30 03:37:38 +03:00
datetime feat(stdlib): DateTime format/parse + simulated Clock — completes #9 2026-08-30 03:51:48 +03:00
duration feat(stdlib): Time/Date/Duration calendar-clock core (issue #9) 2026-08-30 03:37:38 +03:00
ease feat(stdlib): Math.exp/log/pow + Ease.elastic transcendentals (issue #25) 2026-08-30 01:19:44 +03:00
ecs refactor(lang): rename the str type (and stringify builtin) to string 2026-08-30 01:51:11 +03:00
events docs(api): per-symbol pages, fuzzy search, deep token linking, hover cards 2026-08-29 17:53:22 +03:00
hash feat(lang,stdlib): 64-bit long type + 64-bit Hash variants (issue #17) 2026-08-30 01:01:06 +03:00
input docs(api): per-symbol pages, fuzzy search, deep token linking, hover cards 2026-08-29 17:53:22 +03:00
list feat(stdlib): namespaced standard library (issue #2) 2026-08-30 00:26:19 +03:00
map docs(api): per-symbol pages, fuzzy search, deep token linking, hover cards 2026-08-29 17:53:22 +03:00
math refactor(lang): rename builtins flr->floor and fx->fixed 2026-08-30 02:01:56 +03:00
memory refactor(lang): rename the ptr/ptrs types to pointer/pointers 2026-08-30 01:58:54 +03:00
network refactor(stdlib): de-abbreviate namespaces (Mem/Sys/Net/Collide) 2026-08-30 01:30:47 +03:00
networking docs(api): per-symbol pages, fuzzy search, deep token linking, hover cards 2026-08-29 17:53:22 +03:00
operators refactor(lang): rename the ptr/ptrs types to pointer/pointers 2026-08-30 01:58:54 +03:00
phases docs(api): per-symbol pages, fuzzy search, deep token linking, hover cards 2026-08-29 17:53:22 +03:00
random feat(stdlib): namespaced standard library (issue #2) 2026-08-30 00:26:19 +03:00
save feat(stdlib): namespaced standard library (issue #2) 2026-08-30 00:26:19 +03:00
scenes docs(api): per-symbol pages, fuzzy search, deep token linking, hover cards 2026-08-29 17:53:22 +03:00
screen feat(stdlib): namespaced standard library (issue #2) 2026-08-30 00:26:19 +03:00
structure refactor(lang): rename builtins flr->floor and fx->fixed 2026-08-30 02:01:56 +03:00
system refactor(lang): rename the ptr/ptrs types to pointer/pointers 2026-08-30 01:58:54 +03:00
text refactor(lang): rename the str type (and stringify builtin) to string 2026-08-30 01:51:11 +03:00
time feat(stdlib): Time/Date/Duration calendar-clock core (issue #9) 2026-08-30 03:37:38 +03:00
types feat(stdlib): 2D Vector type + Vector.* namespace (issue #25) 2026-08-30 02:09:38 +03:00
vector feat(stdlib): 2D Vector type + Vector.* namespace (issue #25) 2026-08-30 02:09:38 +03:00
world feat(stdlib): namespaced standard library (issue #2) 2026-08-30 00:26:19 +03:00