use rustc_span::ErrorGuaranteed;
use crate::dep_graph::DepContext;
use crate::query::QueryInfo;
pub trait Value<Tcx: DepContext>: Sized {
fn from_cycle_error(tcx: Tcx, cycle: &[QueryInfo], guar: ErrorGuaranteed) -> Self;
}
impl<Tcx: DepContext, T> Value<Tcx> for T {
default fn from_cycle_error(tcx: Tcx, cycle: &[QueryInfo], _guar: ErrorGuaranteed) -> T {
tcx.sess().abort_if_errors();
// Ideally we would use `bug!` here. But bug! is only defined in rustc_middle, and it's
// non-trivial to define it earlier.
panic!(
"<{} as Value>::from_cycle_error called without errors: {cycle:#?}",
std::any::type_name::<T>()
);
}
}