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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 12:06:31 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 12:06:31 +0000
commit2ff14448863ac1a1dd9533461708e29aae170c2d (patch)
tree85b9fea2bbfe3f06473cfa381eed11f273b57c5c /compiler/rustc_middle/src/values.rs
parentAdding debian version 1.64.0+dfsg1-1. (diff)
downloadrustc-2ff14448863ac1a1dd9533461708e29aae170c2d.tar.xz
rustc-2ff14448863ac1a1dd9533461708e29aae170c2d.zip
Adding debian version 1.65.0+dfsg1-2.debian/1.65.0+dfsg1-2
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r--compiler/rustc_middle/src/values.rs54
1 files changed, 54 insertions, 0 deletions
diff --git a/compiler/rustc_middle/src/values.rs b/compiler/rustc_middle/src/values.rs
new file mode 100644
index 000000000..7fbe9ae2a
--- /dev/null
+++ b/compiler/rustc_middle/src/values.rs
@@ -0,0 +1,54 @@
+use rustc_middle::ty::{self, AdtSizedConstraint, Ty, TyCtxt};
+use rustc_query_system::Value;
+
+impl<'tcx> Value<TyCtxt<'tcx>> for Ty<'_> {
+ fn from_cycle_error(tcx: TyCtxt<'tcx>) -> Self {
+ // SAFETY: This is never called when `Self` is not `Ty<'tcx>`.
+ // FIXME: Represent the above fact in the trait system somehow.
+ unsafe { std::mem::transmute::<Ty<'tcx>, Ty<'_>>(tcx.ty_error()) }
+ }
+}
+
+impl<'tcx> Value<TyCtxt<'tcx>> for ty::SymbolName<'_> {
+ fn from_cycle_error(tcx: TyCtxt<'tcx>) -> Self {
+ // SAFETY: This is never called when `Self` is not `SymbolName<'tcx>`.
+ // FIXME: Represent the above fact in the trait system somehow.
+ unsafe {
+ std::mem::transmute::<ty::SymbolName<'tcx>, ty::SymbolName<'_>>(ty::SymbolName::new(
+ tcx, "<error>",
+ ))
+ }
+ }
+}
+
+impl<'tcx> Value<TyCtxt<'tcx>> for AdtSizedConstraint<'_> {
+ fn from_cycle_error(tcx: TyCtxt<'tcx>) -> Self {
+ // SAFETY: This is never called when `Self` is not `AdtSizedConstraint<'tcx>`.
+ // FIXME: Represent the above fact in the trait system somehow.
+ unsafe {
+ std::mem::transmute::<AdtSizedConstraint<'tcx>, AdtSizedConstraint<'_>>(
+ AdtSizedConstraint(tcx.intern_type_list(&[tcx.ty_error()])),
+ )
+ }
+ }
+}
+
+impl<'tcx> Value<TyCtxt<'tcx>> for ty::Binder<'_, ty::FnSig<'_>> {
+ fn from_cycle_error(tcx: TyCtxt<'tcx>) -> Self {
+ let err = tcx.ty_error();
+ // FIXME(compiler-errors): It would be nice if we could get the
+ // query key, so we could at least generate a fn signature that
+ // has the right arity.
+ let fn_sig = ty::Binder::dummy(tcx.mk_fn_sig(
+ [].into_iter(),
+ err,
+ false,
+ rustc_hir::Unsafety::Normal,
+ rustc_target::spec::abi::Abi::Rust,
+ ));
+
+ // SAFETY: This is never called when `Self` is not `ty::Binder<'tcx, ty::FnSig<'tcx>>`.
+ // FIXME: Represent the above fact in the trait system somehow.
+ unsafe { std::mem::transmute::<ty::PolyFnSig<'tcx>, ty::Binder<'_, ty::FnSig<'_>>>(fn_sig) }
+ }
+}