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173eb6f407
On later stages, the feature is already stable. Result of running: rg -l "feature.let_else" compiler/ src/librustdoc/ library/ | xargs sed -s -i "s#\\[feature.let_else#\\[cfg_attr\\(bootstrap, feature\\(let_else\\)#"
53 lines
1.5 KiB
Rust
53 lines
1.5 KiB
Rust
#![feature(array_windows)]
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#![feature(control_flow_enum)]
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#![cfg_attr(bootstrap, feature(let_else))]
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#![recursion_limit = "256"]
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#![allow(rustc::potential_query_instability)]
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#![deny(rustc::untranslatable_diagnostic)]
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#![deny(rustc::diagnostic_outside_of_impl)]
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#[macro_use]
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extern crate tracing;
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#[macro_use]
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extern crate rustc_middle;
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use rustc_hir::lang_items::LangItem;
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use rustc_middle::traits;
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use rustc_middle::ty::adjustment::CustomCoerceUnsized;
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use rustc_middle::ty::query::Providers;
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use rustc_middle::ty::{self, Ty, TyCtxt};
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mod collector;
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mod errors;
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mod partitioning;
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mod polymorphize;
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mod util;
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fn custom_coerce_unsize_info<'tcx>(
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tcx: TyCtxt<'tcx>,
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source_ty: Ty<'tcx>,
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target_ty: Ty<'tcx>,
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) -> CustomCoerceUnsized {
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let def_id = tcx.require_lang_item(LangItem::CoerceUnsized, None);
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let trait_ref = ty::Binder::dummy(ty::TraitRef {
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def_id,
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substs: tcx.mk_substs_trait(source_ty, &[target_ty.into()]),
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});
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match tcx.codegen_select_candidate((ty::ParamEnv::reveal_all(), trait_ref)) {
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Ok(traits::ImplSource::UserDefined(traits::ImplSourceUserDefinedData {
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impl_def_id,
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..
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})) => tcx.coerce_unsized_info(impl_def_id).custom_kind.unwrap(),
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impl_source => {
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bug!("invalid `CoerceUnsized` impl_source: {:?}", impl_source);
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}
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}
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}
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pub fn provide(providers: &mut Providers) {
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partitioning::provide(providers);
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polymorphize::provide(providers);
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}
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