627ee44275
Add 'output: field1, field2' syntax to stream declarations to control
which signals are exposed over the relay. Only listed signals are
registered in _signalRegistry (and thus streamed). Omitting output
streams all signals (backwards-compatible).
Also strips internal sync metadata (_pid, _v) from receiver state
so composition consumers only see clean signal values.
Parser: parse comma-separated idents after 'output:' key
AST: Vec<String> output field on StreamDecl
Codegen: conditional _registerSignal, delete _pid/_v on receive
Example: stream counter on 'ws://...' { mode: signal, output: count, doubled }
26 lines
607 B
Text
26 lines
607 B
Text
-- DreamStack Streaming Counter
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-- A reactive counter that streams all signal changes
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-- to remote receivers via the bitstream relay.
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--
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-- Run with:
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-- cargo run -p ds-stream &
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-- dreamstack stream examples/streaming-counter.ds
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let count = 0
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let doubled = count * 2
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let message = "Streaming Counter"
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stream counter on "ws://localhost:9100" { mode: signal, output: count, doubled }
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view counter =
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column [
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text message
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text count
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text doubled
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row [
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button "-" { click: count -= 1 }
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button "+" { click: count += 1 }
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]
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when count > 10 ->
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text "On fire!"
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]
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