fea5617e4e
xs[1..=3] (end inclusive), xs[0<..<4] (both exclusive), xs[..=2] (prefix form with markers, implicit 0 start), xs[2<..] (open end, exclusive start), and xs[..] (whole collection) — lowered as lo+1 / hi+1 on the existing subslice op. Strings slice through the same path. An explicit end marker requires an end expression, matching the for-header rule. Regression: examples/0052-basic-slice-range-bounds.sx.
33 lines
1.0 KiB
Plaintext
33 lines
1.0 KiB
Plaintext
// Slice range bound markers — same matrix as for-header ranges: each side
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// of `..` takes `=` (inclusive) or `<` (exclusive), defaults 0-inclusive
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// start / exclusive end. Prefix form takes markers too ([..=2], [<..3]);
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// [..] is the whole slice; bounds are arbitrary expressions; strings slice
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// through the same path.
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#import "modules/std.sx";
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dump :: (s: []s64, tag: string) {
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print("{}: ", tag);
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for s (v) { print("{} ", v); }
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print("(len {})\n", s.len);
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}
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main :: () -> s32 {
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xs : [6]s64 = .[10, 11, 12, 13, 14, 15];
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full : []s64 = xs[0..6];
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dump(full[1..=3], "1..=3"); // 11 12 13
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dump(full[0<..<4], "0<..<4"); // 11 12 13
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dump(full[..=2], "..=2"); // 10 11 12
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dump(full[<..3], "<..3"); // 11 12
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dump(full[2<..], "2<.."); // 13 14 15
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dump(full[..], ".."); // all six
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x := 3;
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dump(full[x-1..=x+1], "x-1..=x+1"); // 12 13 14
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s := "abcdef";
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print("str 1..=3: {}\n", s[1..=3]); // bcd
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print("str 0<..<4: {}\n", s[0<..<4]); // bcd
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0
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}
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