038 nested for simple

// Test: nested for loops - depth-first transform ordering
// Inner for should transform before outer for

~import "$std/control"

const std = @import("std");

~event start {}
| done {}

~proc start {
    return .{ .done = .{} };
}

// Outer for contains inner for
// Both should transform to Zig for loops
~start()
| done |> for(&[_]i32{1, 2})
    | each |> for(&[_]i32{10, 20})
        | each |> _
        | done |> _
    | done |> _