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Diffstat (limited to 'compiler/rustc_monomorphize/src/lib.rs')
-rw-r--r-- | compiler/rustc_monomorphize/src/lib.rs | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/compiler/rustc_monomorphize/src/lib.rs b/compiler/rustc_monomorphize/src/lib.rs new file mode 100644 index 000000000..ef4560b5e --- /dev/null +++ b/compiler/rustc_monomorphize/src/lib.rs @@ -0,0 +1,49 @@ +#![feature(array_windows)] +#![feature(control_flow_enum)] +#![feature(let_else)] +#![recursion_limit = "256"] +#![allow(rustc::potential_query_instability)] + +#[macro_use] +extern crate tracing; +#[macro_use] +extern crate rustc_middle; + +use rustc_hir::lang_items::LangItem; +use rustc_middle::traits; +use rustc_middle::ty::adjustment::CustomCoerceUnsized; +use rustc_middle::ty::query::Providers; +use rustc_middle::ty::{self, Ty, TyCtxt}; + +mod collector; +mod partitioning; +mod polymorphize; +mod util; + +fn custom_coerce_unsize_info<'tcx>( + tcx: TyCtxt<'tcx>, + source_ty: Ty<'tcx>, + target_ty: Ty<'tcx>, +) -> CustomCoerceUnsized { + let def_id = tcx.require_lang_item(LangItem::CoerceUnsized, None); + + let trait_ref = ty::Binder::dummy(ty::TraitRef { + def_id, + substs: tcx.mk_substs_trait(source_ty, &[target_ty.into()]), + }); + + match tcx.codegen_fulfill_obligation((ty::ParamEnv::reveal_all(), trait_ref)) { + Ok(traits::ImplSource::UserDefined(traits::ImplSourceUserDefinedData { + impl_def_id, + .. + })) => tcx.coerce_unsized_info(impl_def_id).custom_kind.unwrap(), + impl_source => { + bug!("invalid `CoerceUnsized` impl_source: {:?}", impl_source); + } + } +} + +pub fn provide(providers: &mut Providers) { + partitioning::provide(providers); + polymorphize::provide(providers); +} |