36 lines
1.3 KiB
Plaintext
36 lines
1.3 KiB
Plaintext
// Free-function dot-calls are OPT-IN. Two opt-in spellings:
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// name :: ufcs (params) { body } — the fn itself is dot-callable
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// name :: ufcs target; — dot-callable (renaming) alias
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// A plain fn is callable directly or via `|>` only (see 1166 for the
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// rejection). Generic ufcs fns dispatch through normal monomorphization,
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// and the plan-side return type binds from the receiver (structured
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// params like `[]$T` included).
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#import "modules/std.sx";
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bump :: (x: s64) -> s64 { x + 1 }
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bump2 :: ufcs (x: s64) -> s64 { x + 2 }
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bump3 :: ufcs bump;
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Counter :: struct { n: s64; }
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inc :: ufcs (c: *Counter, by: s64) -> s64 { c.n += by; c.n }
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gfirst :: ufcs (xs: []$T) -> T { xs[0] }
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main :: () {
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f : s64 = 40;
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print("marked: {}\n", f.bump2()); // 42
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print("alias: {}\n", f.bump3()); // 41
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print("direct: {}\n", bump(f)); // 41 — plain fn, direct
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print("pipe: {}\n", f |> bump()); // 41 — plain fn, pipe
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print("marked-direct: {}\n", bump2(f)); // 42 — marked fn callable directly
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c := Counter.{ n = 10 };
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print("ptr-recv: {}\n", c.inc(5)); // 15 — auto address-of receiver
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arr := .[7, 8, 9];
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xs : []s64 = arr;
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print("generic-dot: {}\n", xs.gfirst()); // 7
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print("generic-direct: {}\n", gfirst(xs)); // 7 — plan types it s64, not a T stub
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}
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