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// These functions are used by macro expansion for bug! and span_bug!
use crate::ty::{tls, TyCtxt};
use rustc_errors::MultiSpan;
use rustc_span::Span;
use std::fmt;
use std::panic::{panic_any, Location};
#[cold]
#[inline(never)]
#[track_caller]
pub fn bug_fmt(args: fmt::Arguments<'_>) -> ! {
// this wrapper mostly exists so I don't have to write a fully
// qualified path of None::<Span> inside the bug!() macro definition
opt_span_bug_fmt(None::<Span>, args, Location::caller());
}
#[cold]
#[inline(never)]
#[track_caller]
pub fn span_bug_fmt<S: Into<MultiSpan>>(span: S, args: fmt::Arguments<'_>) -> ! {
opt_span_bug_fmt(Some(span), args, Location::caller());
}
#[track_caller]
fn opt_span_bug_fmt<S: Into<MultiSpan>>(
span: Option<S>,
args: fmt::Arguments<'_>,
location: &Location<'_>,
) -> ! {
tls::with_opt(move |tcx| {
let msg = format!("{}: {}", location, args);
match (tcx, span) {
(Some(tcx), Some(span)) => tcx.sess.diagnostic().span_bug(span, &msg),
(Some(tcx), None) => tcx.sess.diagnostic().bug(&msg),
(None, _) => panic_any(msg),
}
});
unreachable!();
}
/// A query to trigger a `delay_span_bug`. Clearly, if one has a `tcx` one can already trigger a
/// `delay_span_bug`, so what is the point of this? It exists to help us test `delay_span_bug`'s
/// interactions with the query system and incremental.
pub fn trigger_delay_span_bug(tcx: TyCtxt<'_>, key: rustc_hir::def_id::DefId) {
tcx.sess.delay_span_bug(
tcx.def_span(key),
"delayed span bug triggered by #[rustc_error(delay_span_bug_from_inside_query)]",
);
}
pub fn provide(providers: &mut crate::ty::query::Providers) {
*providers = crate::ty::query::Providers { trigger_delay_span_bug, ..*providers };
}
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