giles
10576f86d1
- Symbol interning in sx_types.ml: env lookups use int keys (intern/unintern) to avoid repeated string hashing in scope chain walks - sx-platform.js: poll for SxKernel availability (WASM init is async) - shell.sx: load sx_browser.bc.wasm.js when SX_USE_WASM=1 - bundle.sh: fix .sx file paths (web-signals.sx rename) - browser/dune: target byte+js+wasm modes - Bundle 23 .sx platform files for browser (dom, signals, router, boot, etc.) Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
95 lines
3.3 KiB
Plaintext
95 lines
3.3 KiB
Plaintext
;; ==========================================================================
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;; freeze.sx — Serializable state boundaries
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;;
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;; Freeze scopes collect signals registered within them. On freeze,
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;; their current values are serialized to SX. On thaw, values are
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;; restored. Multiple named scopes can coexist independently.
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;;
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;; This is a library built on top of the evaluator's scoped effects
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;; (scope-push!/scope-pop!/context) and signal system. It is NOT
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;; part of the core evaluator — it loads after evaluator.sx.
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;;
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;; Usage:
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;; (freeze-scope "editor"
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;; (let ((doc (signal "hello")))
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;; (freeze-signal "doc" doc)
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;; ...))
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;;
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;; (cek-freeze-scope "editor") → {:name "editor" :signals {:doc "hello"}}
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;; (cek-thaw-scope "editor" frozen-data) → restores signal values
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;; ==========================================================================
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;; Registry of freeze scopes: name → list of {name signal} entries
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(define freeze-registry (dict))
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;; Register a signal in the current freeze scope
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(define freeze-signal :effects [mutation]
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(fn (name sig)
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(let ((scope-name (context "sx-freeze-scope" nil)))
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(when scope-name
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(let ((entries (or (get freeze-registry scope-name) (list))))
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(append! entries (dict "name" name "signal" sig))
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(dict-set! freeze-registry scope-name entries))))))
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;; Freeze scope delimiter — collects signals registered within body
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(define freeze-scope :effects [mutation]
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(fn (name body-fn)
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(scope-push! "sx-freeze-scope" name)
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;; Initialize empty entry list for this scope
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(dict-set! freeze-registry name (list))
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(cek-call body-fn nil)
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(scope-pop! "sx-freeze-scope")
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nil))
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;; Freeze a named scope → SX dict of signal values
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(define cek-freeze-scope :effects []
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(fn (name)
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(let ((entries (or (get freeze-registry name) (list)))
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(signals-dict (dict)))
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(for-each (fn (entry)
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(dict-set! signals-dict
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(get entry "name")
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(signal-value (get entry "signal"))))
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entries)
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(dict "name" name "signals" signals-dict))))
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;; Freeze all scopes
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(define cek-freeze-all :effects []
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(fn ()
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(map (fn (name) (cek-freeze-scope name))
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(keys freeze-registry))))
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;; Thaw a named scope — restore signal values from frozen data
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(define cek-thaw-scope :effects [mutation]
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(fn (name frozen)
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(let ((entries (or (get freeze-registry name) (list)))
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(values (get frozen "signals")))
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(when values
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(for-each (fn (entry)
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(let ((sig-name (get entry "name"))
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(sig (get entry "signal"))
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(val (get values sig-name)))
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(when (not (nil? val))
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(reset! sig val))))
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entries)))))
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;; Thaw all scopes from a list of frozen scope dicts
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(define cek-thaw-all :effects [mutation]
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(fn (frozen-list)
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(for-each (fn (frozen)
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(cek-thaw-scope (get frozen "name") frozen))
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frozen-list)))
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;; Serialize a frozen scope to SX text
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(define freeze-to-sx :effects []
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(fn (name)
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(sx-serialize (cek-freeze-scope name))))
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;; Restore from SX text
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(define thaw-from-sx :effects [mutation]
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(fn (sx-text)
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(let ((parsed (sx-parse sx-text)))
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(when (not (empty? parsed))
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(let ((frozen (first parsed)))
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(cek-thaw-scope (get frozen "name") frozen))))))
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