32 lines
924 B
Plaintext
32 lines
924 B
Plaintext
// `inline for` pack rejections: (1) a pack-element capture exposes only the
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// constraint protocol's interface (same rule as `xs[i]`, example 0530);
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// (2) a pack element cannot be captured by reference (`(*x)` — an element is
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// an AST-substituted call arg, no storage); (3) a trailing pack shorter than
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// the driving iterable; (4) a non-pack, non-range iterable.
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#import "modules/std.sx";
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Show :: protocol { show :: () -> string; }
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IntBox :: struct { v: s64; }
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impl Show for IntBox { show :: (self: *IntBox) -> string { int_to_string(self.v) } }
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leak :: (..xs: Show) {
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inline for xs (x) {
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print("{}\n", x.v);
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}
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}
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borrow :: (..xs: Show) {
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inline for xs (*x) { }
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}
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short :: (..xs: Show) {
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inline for 0..5, xs (i, x) { }
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}
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main :: () {
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leak(IntBox.{ v = 5 });
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borrow(IntBox.{ v = 5 });
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short(IntBox.{ v = 1 }, IntBox.{ v = 2 });
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arr := .[1, 2, 3];
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inline for arr (x) { }
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}
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