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bors 0a8923361e Auto merge of #119688 - Nadrieril:dont-alloc-custom-wildcards, r=compiler-errors 
Exhaustiveness: use an `Option` instead of allocating fictitious patterns

In the process of exhaustiveness checking, `Matrix` stores a 2D array of patterns. Those are subpatterns of the patterns we were provided as input, _except_ sometimes we allocate some extra wildcard patterns to fill a hole during specialization.

Morally though, we could store `Option<&'p DeconstructedPat>` in the matrix, where `None` signifies a wildcard. That way we'd only have "real" patterns in the matrix and we wouldn't need the arena to allocate these wildcards. This is what this PR does.

This is part of me splitting up https://github.com/rust-lang/rust/pull/119581 for ease of review.

r? `@compiler-errors`
2024-01-11 00:04:10 +00:00
..
rustc Clean up rustc_*/Cargo.toml. 2023-10-30 08:46:02 +11:00
rustc_abi Avoid specialization for the Span Encodable and Decodable impls 2023-12-31 20:42:17 +00:00
rustc_arena rustc_arena: add alloc_str 2023-12-05 17:52:51 -08:00
rustc_ast Auto merge of #119478 - bjorn3:no_serialize_specialization, r=wesleywiser 2024-01-06 09:56:00 +00:00
rustc_ast_lowering Add error code for missing base expression in struct update syntax 2024-01-09 19:25:54 +00:00
rustc_ast_passes Rename consuming chaining methods on DiagnosticBuilder. 2024-01-10 07:40:00 +11:00
rustc_ast_pretty Auto merge of #119105 - dtolnay:paren, r=WaffleLapkin 2023-12-27 21:27:26 +00:00
rustc_attr Rename consuming chaining methods on DiagnosticBuilder. 2024-01-10 07:40:00 +11:00
rustc_baked_icu_data Bump cfg(bootstrap)s 2023-11-15 19:41:28 -05:00
rustc_borrowck Rename consuming chaining methods on DiagnosticBuilder. 2024-01-10 07:40:00 +11:00
rustc_builtin_macros Rename consuming chaining methods on DiagnosticBuilder. 2024-01-10 07:40:00 +11:00
rustc_codegen_cranelift Rollup merge of #117556 - obeis:static-mut-ref-lint, r=davidtwco 2024-01-09 13:23:15 +01:00
rustc_codegen_gcc Rename {create,emit}_warning as {create,emit}_warn. 2024-01-10 07:33:06 +11:00
rustc_codegen_llvm Rename consuming chaining methods on DiagnosticBuilder. 2024-01-10 07:40:00 +11:00
rustc_codegen_ssa Rename consuming chaining methods on DiagnosticBuilder. 2024-01-10 07:40:00 +11:00
rustc_const_eval Add DiagCtxt::delayed_bug. 2024-01-10 07:33:07 +11:00
rustc_data_structures Rollup merge of #119527 - klensy:ordering, r=compiler-errors 2024-01-09 13:23:17 +01:00
rustc_driver Bump cfg(bootstrap)s 2023-11-15 19:41:28 -05:00
rustc_driver_impl Rename {create,emit}_warning as {create,emit}_warn. 2024-01-10 07:33:06 +11:00
rustc_error_codes Add error code for missing base expression in struct update syntax 2024-01-09 19:25:54 +00:00
rustc_error_messages Remove rustc_error_messages/messages.ftl. 2023-11-26 08:37:27 +11:00
rustc_errors Add missing DiagnosticBuilder::eager_diagnostic method. 2024-01-10 07:40:44 +11:00
rustc_expand Rename consuming chaining methods on DiagnosticBuilder. 2024-01-10 07:40:00 +11:00
rustc_feature Rollup merge of #119354 - fmease:negative_bounds-fixes, r=compiler-errors 2024-01-05 20:39:51 +01:00
rustc_fluent_macro Add a useful comment. 2023-11-26 08:38:02 +11:00
rustc_fs_util Clean up rustc_*/Cargo.toml. 2023-10-30 08:46:02 +11:00
rustc_graphviz remove unused pub fn 2023-11-23 14:11:02 +03:00
rustc_hir Auto merge of #117703 - compiler-errors:recursive-async, r=lcnr 2024-01-09 07:20:50 +00:00
rustc_hir_analysis Auto merge of #119751 - nnethercote:error-api-fixes, r=oli-obk 2024-01-10 18:03:53 +00:00
rustc_hir_pretty Remove hir::Guard 2024-01-05 10:56:59 +00:00
rustc_hir_typeck Rename consuming chaining methods on DiagnosticBuilder. 2024-01-10 07:40:00 +11:00
rustc_incremental Rename {create,emit}_warning as {create,emit}_warn. 2024-01-10 07:33:06 +11:00
rustc_index Auto merge of #119499 - cjgillot:dtm-opt, r=nnethercote 2024-01-06 11:54:15 +00:00
rustc_index_macros Put backticks around some attributes in doc comments. 2023-11-27 09:37:01 +11:00
rustc_infer Rename consuming chaining methods on DiagnosticBuilder. 2024-01-10 07:40:00 +11:00
rustc_interface Rename {create,emit}_warning as {create,emit}_warn. 2024-01-10 07:33:06 +11:00
rustc_lexer Rename some unescaping functions. 2023-12-13 14:17:50 +11:00
rustc_lint Rollup merge of #118649 - compiler-errors:coherence-ambig, r=lcnr 2024-01-09 05:33:21 +01:00
rustc_lint_defs Rollup merge of #117556 - obeis:static-mut-ref-lint, r=davidtwco 2024-01-09 13:23:15 +01:00
rustc_llvm Rollup merge of #118941 - krasimirgg:llvm-cov, r=nikic 2023-12-18 17:03:11 +01:00
rustc_log rustc_log: provide a way to init logging based on the values, not names, of the env vars 2023-11-11 15:24:33 +01:00
rustc_macros Auto merge of #119478 - bjorn3:no_serialize_specialization, r=wesleywiser 2024-01-06 09:56:00 +00:00
rustc_metadata Auto merge of #119478 - bjorn3:no_serialize_specialization, r=wesleywiser 2024-01-06 09:56:00 +00:00
rustc_middle Rename consuming chaining methods on DiagnosticBuilder. 2024-01-10 07:40:00 +11:00
rustc_mir_build Add DiagCtxt::delayed_bug. 2024-01-10 07:33:07 +11:00
rustc_mir_dataflow Remove movability from TyKind::Coroutine 2023-12-28 16:35:01 +00:00
rustc_mir_transform Rollup merge of #119699 - cjgillot:simplify-unreachable, r=oli-obk 2024-01-09 13:23:18 +01:00
rustc_monomorphize Rename {create,emit}_warning as {create,emit}_warn. 2024-01-10 07:33:06 +11:00
rustc_next_trait_solver Remove movability from TyKind::Coroutine 2023-12-28 16:35:01 +00:00
rustc_parse Rename consuming chaining methods on DiagnosticBuilder. 2024-01-10 07:40:00 +11:00
rustc_parse_format Removing redudant note from parse error 2024-01-08 19:41:01 +01:00
rustc_passes Add DiagCtxt::delayed_bug. 2024-01-10 07:33:07 +11:00
rustc_pattern_analysis Document the new expand_and_push method 2024-01-09 16:32:17 +01:00
rustc_privacy Remove Session methods that duplicate DiagCtxt methods. 2023-12-24 08:05:28 +11:00
rustc_query_impl Rollup merge of #119527 - klensy:ordering, r=compiler-errors 2024-01-09 13:23:17 +01:00
rustc_query_system Add DiagCtxt::delayed_bug. 2024-01-10 07:33:07 +11:00
rustc_resolve Rename consuming chaining methods on DiagnosticBuilder. 2024-01-10 07:40:00 +11:00
rustc_serialize Avoid specialization for the Span Encodable and Decodable impls 2023-12-31 20:42:17 +00:00
rustc_session Rename consuming chaining methods on DiagnosticBuilder. 2024-01-10 07:40:00 +11:00
rustc_smir Movability doesn't need to be a query anymore 2023-12-28 16:35:01 +00:00
rustc_span Rollup merge of #118903 - azhogin:azhogin/skip_second_stmt_debuginfo.rs, r=petrochenkov 2024-01-09 00:19:32 +01:00
rustc_symbol_mangling Rename consuming chaining methods on DiagnosticBuilder. 2024-01-10 07:40:00 +11:00
rustc_target GNU/Hurd: unconditionally use inline stack probes 2024-01-08 21:36:02 -05:00
rustc_trait_selection Auto merge of #119751 - nnethercote:error-api-fixes, r=oli-obk 2024-01-10 18:03:53 +00:00
rustc_traits add unused NormalizesTo predicate 2023-12-07 17:52:51 +01:00
rustc_transmute Fix an ICE that occurs after an error has already been reported 2024-01-09 16:09:30 +00:00
rustc_ty_utils Add DiagCtxt::delayed_bug. 2024-01-10 07:33:07 +11:00
rustc_type_ir Fix tidy error 2023-12-31 20:58:36 +00:00
stable_mir Restore movability to SMIR 2023-12-28 16:35:01 +00:00