c45f29595d
`MultiSpan` contains labels, which are more complicated with the introduction of diagnostic translation and will use types from `rustc_errors` - however, `rustc_errors` depends on `rustc_span` so `rustc_span` cannot use types like `DiagnosticMessage` without dependency cycles. Introduce a new `rustc_error_messages` crate that can contain `DiagnosticMessage` and `MultiSpan`. Signed-off-by: David Wood <david.wood@huawei.com>
55 lines
1.8 KiB
Rust
55 lines
1.8 KiB
Rust
// These functions are used by macro expansion for bug! and span_bug!
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use crate::ty::{tls, TyCtxt};
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use rustc_errors::MultiSpan;
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use rustc_span::Span;
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use std::fmt;
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use std::panic::{panic_any, Location};
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#[cold]
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#[inline(never)]
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#[track_caller]
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pub fn bug_fmt(args: fmt::Arguments<'_>) -> ! {
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// this wrapper mostly exists so I don't have to write a fully
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// qualified path of None::<Span> inside the bug!() macro definition
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opt_span_bug_fmt(None::<Span>, args, Location::caller());
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}
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#[cold]
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#[inline(never)]
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#[track_caller]
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pub fn span_bug_fmt<S: Into<MultiSpan>>(span: S, args: fmt::Arguments<'_>) -> ! {
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opt_span_bug_fmt(Some(span), args, Location::caller());
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}
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#[track_caller]
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fn opt_span_bug_fmt<S: Into<MultiSpan>>(
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span: Option<S>,
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args: fmt::Arguments<'_>,
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location: &Location<'_>,
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) -> ! {
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tls::with_opt(move |tcx| {
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let msg = format!("{}: {}", location, args);
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match (tcx, span) {
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(Some(tcx), Some(span)) => tcx.sess.diagnostic().span_bug(span, &msg),
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(Some(tcx), None) => tcx.sess.diagnostic().bug(&msg),
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(None, _) => panic_any(msg),
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}
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});
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unreachable!();
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}
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/// A query to trigger a `delay_span_bug`. Clearly, if one has a `tcx` one can already trigger a
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/// `delay_span_bug`, so what is the point of this? It exists to help us test `delay_span_bug`'s
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/// interactions with the query system and incremental.
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pub fn trigger_delay_span_bug(tcx: TyCtxt<'_>, key: rustc_hir::def_id::DefId) {
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tcx.sess.delay_span_bug(
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tcx.def_span(key),
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"delayed span bug triggered by #[rustc_error(delay_span_bug_from_inside_query)]",
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);
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}
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pub fn provide(providers: &mut crate::ty::query::Providers) {
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*providers = crate::ty::query::Providers { trigger_delay_span_bug, ..*providers };
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}
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