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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-30 18:31:44 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-30 18:31:44 +0000 |
commit | c23a457e72abe608715ac76f076f47dc42af07a5 (patch) | |
tree | 2772049aaf84b5c9d0ed12ec8d86812f7a7904b6 /compiler/rustc_middle/src/ty/generic_args.rs | |
parent | Releasing progress-linux version 1.73.0+dfsg1-1~progress7.99u1. (diff) | |
download | rustc-c23a457e72abe608715ac76f076f47dc42af07a5.tar.xz rustc-c23a457e72abe608715ac76f076f47dc42af07a5.zip |
Merging upstream version 1.74.1+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'compiler/rustc_middle/src/ty/generic_args.rs')
-rw-r--r-- | compiler/rustc_middle/src/ty/generic_args.rs | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/compiler/rustc_middle/src/ty/generic_args.rs b/compiler/rustc_middle/src/ty/generic_args.rs index 97dab5cb4..72390e4bb 100644 --- a/compiler/rustc_middle/src/ty/generic_args.rs +++ b/compiler/rustc_middle/src/ty/generic_args.rs @@ -379,12 +379,17 @@ impl<'tcx> GenericArgs<'tcx> { self.iter().filter_map(|k| k.as_const()) } + /// Returns generic arguments that are not lifetimes or host effect params. #[inline] pub fn non_erasable_generics( &'tcx self, + tcx: TyCtxt<'tcx>, + def_id: DefId, ) -> impl DoubleEndedIterator<Item = GenericArgKind<'tcx>> + 'tcx { - self.iter().filter_map(|k| match k.unpack() { - GenericArgKind::Lifetime(_) => None, + let generics = tcx.generics_of(def_id); + self.iter().enumerate().filter_map(|(i, k)| match k.unpack() { + _ if Some(i) == generics.host_effect_index => None, + ty::GenericArgKind::Lifetime(_) => None, generic => Some(generic), }) } @@ -440,7 +445,7 @@ impl<'tcx> GenericArgs<'tcx> { target_args: GenericArgsRef<'tcx>, ) -> GenericArgsRef<'tcx> { let defs = tcx.generics_of(source_ancestor); - tcx.mk_args_from_iter(target_args.iter().chain(self.iter().skip(defs.params.len()))) + tcx.mk_args_from_iter(target_args.iter().chain(self.iter().skip(defs.count()))) } pub fn truncate_to(&self, tcx: TyCtxt<'tcx>, generics: &ty::Generics) -> GenericArgsRef<'tcx> { @@ -450,6 +455,11 @@ impl<'tcx> GenericArgs<'tcx> { pub fn host_effect_param(&'tcx self) -> Option<ty::Const<'tcx>> { self.consts().rfind(|x| matches!(x.kind(), ty::ConstKind::Param(p) if p.name == sym::host)) } + + pub fn print_as_list(&self) -> String { + let v = self.iter().map(|arg| arg.to_string()).collect::<Vec<_>>(); + format!("[{}]", v.join(", ")) + } } impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for GenericArgsRef<'tcx> { @@ -1019,7 +1029,7 @@ impl<'a, 'tcx> ArgFolder<'a, 'tcx> { /// Stores the user-given args to reach some fully qualified path /// (e.g., `<T>::Item` or `<T as Trait>::Item`). #[derive(Copy, Clone, Debug, PartialEq, Eq, Hash, TyEncodable, TyDecodable)] -#[derive(HashStable, TypeFoldable, TypeVisitable, Lift)] +#[derive(HashStable, TypeFoldable, TypeVisitable)] pub struct UserArgs<'tcx> { /// The args for the item as given by the user. pub args: GenericArgsRef<'tcx>, @@ -1046,7 +1056,7 @@ pub struct UserArgs<'tcx> { /// the self type, giving `Foo<?A>`. Finally, we unify that with /// the self type here, which contains `?A` to be `&'static u32` #[derive(Copy, Clone, Debug, PartialEq, Eq, Hash, TyEncodable, TyDecodable)] -#[derive(HashStable, TypeFoldable, TypeVisitable, Lift)] +#[derive(HashStable, TypeFoldable, TypeVisitable)] pub struct UserSelfTy<'tcx> { pub impl_def_id: DefId, pub self_ty: Ty<'tcx>, |