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sx/examples/basic/0022-basic-for-range.sx
agra 66bdc70bf1 test: group examples into per-category folders
Move examples/*.sx and their expected/ snapshots into per-category
subfolders (examples/<category>/...). Folder = leading filename token,
with ffi-objc/ffi-jni kept whole; filenames are unchanged. The corpus
runner and LSP sweep now discover each category's expected/ dir, while
issues/ stays flat. Example 1058's repo-root-relative companion import
is made file-relative. Path strings embedded in 164 snapshots were
regenerated (path-only changes). Test-layout docs in CLAUDE.md updated.
2026-06-21 14:41:34 +03:00

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// Range-based for loops: `for start..end (i) { }` (cursor optional, `end`
// exclusive) is a runtime counting loop; `inline for start..end (i) { }`
// is comptime-unrolled — the cursor is a compile-time constant each
// iteration, so `xs[i]` over a heterogeneous pack substitutes the concrete
// per-position element (this is what drives pack iteration).
#import "modules/std.sx";
Show :: protocol {
show :: (self: *Self) -> string;
}
A :: struct { x: i64; }
B :: struct { s: string; }
impl Show for A { show :: (self: *A) -> string => "A"; }
impl Show for B { show :: (self: *B) -> string => "B"; }
// Comptime-unrolled iteration over a pack; cursor `i` indexes the pack.
each :: (..xs: Show) -> void {
inline for 0..xs.len (i) {
print("[{}]={}\n", i, xs[i].show());
}
}
main :: () -> i32 {
// Runtime range, cursor used.
for 0..3 (i) { print("i={}\n", i); }
// Runtime range, no cursor — body runs `end - start` times.
n := 0;
for 0..5 { n = n + 1; }
print("n={}\n", n);
// Non-zero start.
for 2..5 (j) { print("j={}\n", j); }
// Inline unroll over a heterogeneous pack.
each(A.{ x = 1 }, B.{ s = "hi" }, A.{ x = 3 });
0
}