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Collapse signal platform primitives into pure SX dicts

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Replace _Signal class (Python) and SxSignal constructor (JS) with plain
dicts keyed by "__signal". Nine platform accessor functions become ~20
lines of pure SX in signals.sx. type-of returns "dict" for signals;
signal? is now a structural predicate (dict? + has-key?).

Net: -168 lines platform, +120 lines SX. Zero platform primitives for
reactivity — signals compile to any host via the bootstrappers.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
giles
2026-03-14 00:04:38 +00:00
parent dcc73a68d5
commit f3a9f3ccc0
6 changed files with 121 additions and 169 deletions
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23
shared/sx/ref/run_signal_tests.py
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@@ -87,16 +87,8 @@ env["report-fail"] = _report_fail
env["push-suite"] = _push_suite
env["pop-suite"] = _pop_suite
# Signal platform primitives
env["signal?"] = sx_ref.is_signal
env["make-signal"] = sx_ref.make_signal
env["signal-value"] = sx_ref.signal_value
env["signal-set-value!"] = sx_ref.signal_set_value
env["signal-subscribers"] = sx_ref.signal_subscribers
env["signal-add-sub!"] = sx_ref.signal_add_sub
env["signal-remove-sub!"] = sx_ref.signal_remove_sub
env["signal-deps"] = sx_ref.signal_deps
env["signal-set-deps!"] = sx_ref.signal_set_deps
# Signal functions are now pure SX (transpiled into sx_ref.py from signals.sx)
# Wire both low-level dict-based signal functions and high-level API
env["identical?"] = sx_ref.is_identical
env["island?"] = lambda x: isinstance(x, Island)
@@ -105,6 +97,17 @@ env["scope-push!"] = scope_push
env["scope-pop!"] = scope_pop
env["context"] = sx_context
# Low-level signal functions (now pure SX, transpiled from signals.sx)
env["make-signal"] = sx_ref.make_signal
env["signal?"] = sx_ref.is_signal
env["signal-value"] = sx_ref.signal_value
env["signal-set-value!"] = sx_ref.signal_set_value
env["signal-subscribers"] = sx_ref.signal_subscribers
env["signal-add-sub!"] = sx_ref.signal_add_sub
env["signal-remove-sub!"] = sx_ref.signal_remove_sub
env["signal-deps"] = sx_ref.signal_deps
env["signal-set-deps!"] = sx_ref.signal_set_deps
# Bootstrapped signal functions from sx_ref.py
env["signal"] = sx_ref.signal
env["deref"] = sx_ref.deref