pub const ROW_PART_CLASSES: &[&str];Expand description
The class for a row part.
This comment used to say RowPart was the one closed enum left here, and
that gaining a member would stop this compiling — “the same lockstep break
non_exhaustive was added elsewhere to end”. makeover-layout 0.9.0 ended
it: the enum gained RowPart::Tokens and #[non_exhaustive] in the same
release, so the prediction was paid off rather than waited for.
The fallback is what that costs. A member added upstream lands here as a
bare row-part with no rule of its own, which is a thing rendering plainly
rather than a build that stops. Grep this function when adopting a new
makeover-layout.
Public since 0.27.0. A row’s parts are emitted by whoever builds the row
element, and that is not always this crate: cells_html emits a table’s
cells, but a list row carries the app’s identity and hooks, so a screen
renderer writes it. quasi-webview wrote this list out a second time to do
that, which made the obligation in the paragraph above land on a function
its author would not think to grep.
Every class part_class can return, including the fallback.
Beside the match rather than derived from it, because a match over a
#[non_exhaustive] enum cannot be enumerated from outside. It carries the
same obligation the match does and a test below holds the two together, so
a new arm added without a new entry fails rather than silently narrowing
what a checker believes this crate can emit.