bors e7cc3bddbe Auto merge of #92007 - oli-obk:lazy_tait2, r=nikomatsakis ... Lazy type-alias-impl-trait Previously opaque types were processed by 1. replacing all mentions of them with inference variables 2. memorizing these inference variables in a side-table 3. at the end of typeck, resolve the inference variables in the side table and use the resolved type as the hidden type of the opaque type This worked okayish for `impl Trait` in return position, but required lots of roundabout type inference hacks and processing. This PR instead stops this process of replacing opaque types with inference variables, and just keeps the opaque types around. Whenever an opaque type `O` is compared with another type `T`, we make the comparison succeed and record `T` as the hidden type. If `O` is compared to `U` while there is a recorded hidden type for it, we grab the recorded type (`T`) and compare that against `U`. This makes implementing * https://github.com/rust-lang/rfcs/pull/2515 much simpler (previous attempts on the inference based scheme were very prone to ICEs and general misbehaviour that was not explainable except by random implementation defined oddities). r? `@nikomatsakis` fixes #93411 fixes #88236		2022-02-07 23:40:26 +00:00
..
rustc	remove unused jemallocator crate	2022-01-28 16:56:05 +01:00
rustc_apfloat	Stabilize iter::zip.	2021-12-14 18:50:31 -04:00
rustc_arena	Remove unused dep from rustc_arena	2022-02-02 17:37:14 +01:00
rustc_ast	Make Decodable and Decoder infallible.	2022-01-22 10:38:31 +11:00
rustc_ast_lowering	More let_else adoptions	2022-02-02 17:11:01 +01:00
rustc_ast_passes	add a rustc::query_stability lint	2022-02-01 10:15:59 +01:00
rustc_ast_pretty	Change struct expr pretty printing to match rustfmt style	2022-02-03 10:59:35 -08:00
rustc_attr	More let_else adoptions	2022-02-02 17:11:01 +01:00
rustc_borrowck	Auto merge of #92007 - oli-obk:lazy_tait2, r=nikomatsakis	2022-02-07 23:40:26 +00:00
rustc_builtin_macros	Rollup merge of #93416 - name1e5s:chore/remove_allow_fail, r=m-ou-se	2022-02-07 14:08:34 +00:00
rustc_codegen_cranelift	Use an indexmap to avoid sorting LocalDefIds	2022-01-22 22:34:16 -06:00
rustc_codegen_gcc	Merge landing_pad and set_cleanup into cleanup_landing_pad	2022-01-24 14:10:05 +01:00
rustc_codegen_llvm	Rollup merge of #90132 - joshtriplett:stabilize-instrument-coverage, r=wesleywiser	2022-02-04 18:42:13 +01:00
rustc_codegen_ssa	Rollup merge of #90132 - joshtriplett:stabilize-instrument-coverage, r=wesleywiser	2022-02-04 18:42:13 +01:00
rustc_const_eval	Auto merge of #92007 - oli-obk:lazy_tait2, r=nikomatsakis	2022-02-07 23:40:26 +00:00
rustc_data_structures	Auto merge of #92007 - oli-obk:lazy_tait2, r=nikomatsakis	2022-02-07 23:40:26 +00:00
rustc_driver	Rollup merge of #93566 - Aaron1011:rustc-backtrace, r=davidtwco	2022-02-03 22:20:26 +09:00
rustc_error_codes	Rollup merge of #91939 - GKFX:feature-91866, r=cjgillot	2022-02-06 04:13:29 +01:00
rustc_errors	add a rustc::query_stability lint	2022-02-01 10:15:59 +01:00
rustc_expand	add a rustc::query_stability lint	2022-02-01 10:15:59 +01:00
rustc_feature	Rollup merge of #93682 - PatchMixolydic:where-in-the-world-is-const_fn_trait_bound, r=oli-obk	2022-02-07 14:08:37 +00:00
rustc_fs_util
rustc_graphviz	eplace usages of vec![].into_iter with [].into_iter	2022-01-09 14:09:25 +11:00
rustc_hir	Auto merge of #93179 - Urgau:unreachable-2021, r=m-ou-se,oli-obk	2022-02-07 00:26:52 +00:00
rustc_hir_pretty	Change pp indent to signed to allow negative indents	2022-02-03 10:59:09 -08:00
rustc_incremental	add a rustc::query_stability lint	2022-02-01 10:15:59 +01:00
rustc_index	implement lint for suspicious auto trait impls	2022-02-01 09:55:19 +01:00
rustc_infer	Auto merge of #92007 - oli-obk:lazy_tait2, r=nikomatsakis	2022-02-07 23:40:26 +00:00
rustc_interface	Rollup merge of #90132 - joshtriplett:stabilize-instrument-coverage, r=wesleywiser	2022-02-04 18:42:13 +01:00
rustc_lexer
rustc_lint	Auto merge of #92007 - oli-obk:lazy_tait2, r=nikomatsakis	2022-02-07 23:40:26 +00:00
rustc_lint_defs	implement lint for suspicious auto trait impls	2022-02-01 09:55:19 +01:00
rustc_llvm	Windows: Disable LLVM crash dialog boxes.	2022-01-27 16:53:17 -08:00
rustc_log	Make rustc_log doc test runnable	2022-01-03 22:31:56 -08:00
rustc_macros	Make Decodable and Decoder infallible.	2022-01-22 10:38:31 +11:00
rustc_metadata	Auto merge of #93539 - petrochenkov:doclink, r=camelid,michaelwoerister	2022-02-05 18:27:06 +00:00
rustc_middle	Auto merge of #92007 - oli-obk:lazy_tait2, r=nikomatsakis	2022-02-07 23:40:26 +00:00
rustc_mir_build	Auto merge of #92007 - oli-obk:lazy_tait2, r=nikomatsakis	2022-02-07 23:40:26 +00:00
rustc_mir_dataflow	rustc_mir_dataflow: use iter::once instead of Some().into_iter	2022-02-03 13:52:26 -07:00
rustc_mir_transform	Rollup merge of #90132 - joshtriplett:stabilize-instrument-coverage, r=wesleywiser	2022-02-04 18:42:13 +01:00
rustc_monomorphize	add a rustc::query_stability lint	2022-02-01 10:15:59 +01:00
rustc_parse	clippy::perf fixes	2022-02-03 21:45:51 +01:00
rustc_parse_format
rustc_passes	Rollup merge of #90998 - jhpratt:require-const-stability, r=oli-obk	2022-02-06 10:43:50 +01:00
rustc_plugin_impl
rustc_privacy	add a rustc::query_stability lint	2022-02-01 10:15:59 +01:00
rustc_query_impl	add a rustc::query_stability lint	2022-02-01 10:15:59 +01:00
rustc_query_system	Auto merge of #92007 - oli-obk:lazy_tait2, r=nikomatsakis	2022-02-07 23:40:26 +00:00
rustc_resolve	resolve lifetimes for const generic defaults	2022-02-05 01:30:14 -08:00
rustc_save_analysis	More let_else adoptions	2022-02-02 17:11:01 +01:00
rustc_serialize	Drop json::from_reader	2022-02-05 15:07:10 -05:00
rustc_session	Rollup merge of #93608 - nnethercote:speed-up-find_library_crate, r=petrochenkov	2022-02-04 18:42:16 +01:00
rustc_span	Auto merge of #93179 - Urgau:unreachable-2021, r=m-ou-se,oli-obk	2022-02-07 00:26:52 +00:00
rustc_symbol_mangling	add a rustc::query_stability lint	2022-02-01 10:15:59 +01:00
rustc_target	Rollup merge of #93680 - Mark-Simulacrum:drop-json-reader, r=bjorn3	2022-02-07 14:08:36 +00:00
rustc_trait_selection	Fix some doctests where the main function returns an opaque type	2022-02-02 17:15:18 +00:00
rustc_traits	Lazily resolve type-alias-impl-trait defining uses	2022-02-02 15:40:11 +00:00
rustc_ty_utils	remove TyS::same_type	2022-02-01 11:21:26 +01:00
rustc_type_ir	Remove some unused arguments and update a comment	2022-02-02 15:40:12 +00:00
rustc_typeck	Auto merge of #92007 - oli-obk:lazy_tait2, r=nikomatsakis	2022-02-07 23:40:26 +00:00