11 lines
447 B
Plaintext
11 lines
447 B
Plaintext
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// Capture demo:
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// - locals are captured by reference using RefCellBox (use .get/.set)
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// - non-locals (global/statics) are captured by value (P1)
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local y = 41
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local ycell = new RefCellBox(y)
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local f = fn(x){ ycell.set(ycell.get() + 1); x + ycell.get() }
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// outer writes through RefCellBox
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// y itself remains 41; ycell holds the mutable state
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local con = new ConsoleBox()
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con.println(f(1)) // 43 (ycell started 41, incremented to 42, x=1 -> 43)
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