// Koru Standard Library: Reactive Stores — the `query` event.
// Joined via `~part query` in store.kz; merged into the store module at load.
//
// `claims_descendants`: query MUST fire before its own `! query <row> |> body`
// branch is walked. Otherwise print.ln (deeper, so depth-first-first) resolves
// the body's `{{ field }}` holes while the row binding isn't in scope yet
// (pre-transplant), leaving a raw template. query dodges this by having `create`
// drive the transplant early (on `new`); sweep drives its OWN transplant at the
// site, so it must claim its descendants to win the same race.
~[keyword|comptime|transform|claims_descendants] pub tor query {
    expr: Expression,
    invocation: *const Invocation,
    item: std/compiler:*const Item,
    program: std/compiler:*const Program,
    reporter: std/compiler:*ErrorReporter,
    allocator: std.mem.Allocator
} -> SiteResult