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248 Commits

Author SHA1 Message Date
Jonas Schievink
853cfd462f
Rollup merge of #81504 - matsujika:suggestion-field-access, r=estebank 
Suggest accessing field when appropriate

Fix #81222

r? ``@estebank``
 2021-02-01 14:29:37 +01:00
Jonas Schievink
9e8753e2bb
Rollup merge of #81463 - matsujika:nll-ensure-c-case, r=varkor 
Rename NLL* to Nll* accordingly to C-CASE

Given [C-CASE](https://rust-lang.github.io/api-guidelines/naming.html#casing-conforms-to-rfc-430-c-case), `NLLRegionVariableOrigin` and `NLL` are encouraged to be `NllRegionVariableOrigin` and `Nll` respectively.
 2021-02-01 14:29:35 +01:00
Hirochika Matsumoto
f45a99361a Rustfmt 2021-01-31 16:52:46 +09:00
Hirochika Matsumoto
a292ac7177 Fix prefix of debug log 2021-01-31 16:49:33 +09:00
Hirochika Matsumoto
6bc9634de3 Rename function to suggest_accessing_field_where_appropriate 2021-01-30 14:25:43 +09:00
Hirochika Matsumoto
2ce2d145c2 Account for union 2021-01-30 14:18:50 +09:00
Hirochika Matsumoto
08d31e0f09 Remove logging iterator 2021-01-30 13:50:44 +09:00
Hirochika Matsumoto
9e4ed337c7 Suggest accessing field when code compiles with it 2021-01-29 06:52:49 +09:00
Hirochika Matsumoto
f8e0e78d75 Rename NLL* to Nll* accordingly to C-CASE 2021-01-28 16:18:25 +09:00
Yuki Okushi
446edd1e1a
Rollup merge of #79951 - LeSeulArtichaut:ty-ir, r=nikomatsakis 
Refractor a few more types to `rustc_type_ir`

In the continuation of #79169, ~~blocked on that PR~~.

This PR:
 - moves `IntVarValue`, `FloatVarValue`, `InferTy` (and friends) and `Variance`
 - creates the `IntTy`, `UintTy` and `FloatTy` enums in `rustc_type_ir`, based on their `ast` and `chalk_ir` equilavents, and uses them for types in the rest of the compiler.

~~I will split up that commit to make this easier to review and to have a better commit history.~~
EDIT: done, I split the PR in commits of 200-ish lines each

r? `````@nikomatsakis````` cc `````@jackh726`````
 2021-01-28 15:09:02 +09:00
LeSeulArtichaut
50e1ae15e9 Use ty::{IntTy,UintTy,FloatTy} in rustc 2021-01-18 21:09:30 +01:00
Daiki Ihara
db95b5ca9b Add suggestion for impl_candidates with E0283 
Update compiler/rustc_infer/src/infer/error_reporting/need_type_info.rs

Co-authored-by: Esteban Kuber <estebank@users.noreply.github.com>
 2021-01-18 21:57:15 +09:00
Jack Huey
dcad9f1893 More review comments 2021-01-16 18:56:37 -05:00
Jack Huey
3dea68de1d Review changes 2021-01-16 18:56:37 -05:00
Jack Huey
476bd53058 Cleanup 2021-01-16 18:50:34 -05:00
Jack Huey
e76476afe4 Cleanup 2021-01-16 18:40:47 -05:00
Jack Huey
4cd6f85a07 Remove PredicateKind 2021-01-16 18:40:47 -05:00
Jack Huey
8278314a8b Remove PredicateKind::Atom 2021-01-16 18:40:47 -05:00
LingMan
a56bffb4f9 Use Option::map_or instead of .map(..).unwrap_or(..) 2021-01-14 19:23:59 +01:00
bors
fc93e4719c Auto merge of #80960 - Dylan-DPC:rollup-89tri8x, r=Dylan-DPC 
Rollup of 10 pull requests

Successful merges:

 - #78901 (diagnostics: Note capturing closures can't be coerced to fns)
 - #79588 (Provide more information for HRTB lifetime errors involving closures)
 - #80232 (Remove redundant def_id lookups)
 - #80662 (Added support for i386-unknown-linux-gnu and i486-unknown-linux-gnu)
 - #80736 (use Once instead of Mutex to manage capture resolution)
 - #80796 (Update to LLVM 11.0.1)
 - #80859 (Fix --pretty=expanded with --remap-path-prefix)
 - #80922 (Revert "Auto merge of #76896 - spastorino:codegen-inline-fns2)
 - #80924 (Fix rustdoc --test-builder argument parsing)
 - #80935 (Rename `rustc_middle::lint::LevelSource` to `LevelAndSource`)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup
 2021-01-13 04:29:45 +00:00
bors
150d1fee04 Auto merge of #79322 - jyn514:refactor-impl, r=estebank 
Separate out a `hir::Impl` struct

This makes it possible to pass the `Impl` directly to functions, instead
of having to pass each of the many fields one at a time. It also
simplifies matches in many cases.

See `rustc_save_analysis::dump_visitor::process_impl` or `rustdoc::clean::clean_impl` for a good example of how this makes `impl`s easier to work with.

r? `@petrochenkov` maybe?
 2021-01-13 01:40:41 +00:00
Joshua Nelson
a8ff647deb Separate out a hir::Impl struct 
This makes it possible to pass the `Impl` directly to functions, instead
of having to pass each of the many fields one at a time. It also
simplifies matches in many cases.
 2021-01-12 20:32:33 -05:00
Esteban Küber
a8a974245e Provide more information for HRTB lifetime errors involving closures 2021-01-12 13:53:13 -08:00
William Bain
d46c3e3411 Tweak ? inference error messages 2021-01-10 19:48:11 -05:00
William Bain
62a39ed526 Extract parent def handling for infer failure err 2021-01-10 19:48:11 -05:00
William Bain
b9d9776fea Refactor cannot infer ... message rendering 2021-01-10 19:48:10 -05:00
William Bain
0496fdee4f Note inference failures using ? conversion 2021-01-10 19:47:57 -05:00
Yuki Okushi
faf8beddef
Rollup merge of #80637 - LingMan:filter, r=oli-obk 
Use Option::filter instead of open-coding it

`@rustbot` modify labels +C-cleanup +T-compiler
 2021-01-05 09:52:42 +09:00
LingMan
203d5025bb Use Option::filter instead of open-coding it 2021-01-03 05:53:15 +01:00
Matthias Krüger
8a90626a46 reduce borrowing and (de)referencing around match patterns (clippy::match_ref_pats) 2021-01-02 20:09:17 +01:00
Rémy Rakic
1fc3c4c16d adjust const generics defaults FIXMEs to the new feature gate 2021-01-01 11:01:01 +01:00
Yuki Okushi
7008911080 FIx ICE on wf check for foreign fns 2020-12-31 11:25:53 +09:00
Yuki Okushi
41fa0dba27
Rollup merge of #80509 - matthiaskrgr:ptr_arg, r=varkor 
where possible, pass slices instead of &Vec or &String (clippy::ptr_arg)
 2020-12-30 22:49:26 +09:00
Matthias Krüger
bdc9291ed9 where possible, pass slices instead of &Vec or &String (clippy::ptr_arg) 2020-12-30 13:11:52 +01:00
Yuki Okushi
a309468a8c
Rollup merge of #80348 - matthiaskrgr:less_clones, r=Dylan-DPC 
remove redundant clones (clippy::redundant_clone)
 2020-12-30 18:15:04 +09:00
Dylan DPC
c51172f38a
Rollup merge of #80344 - matthiaskrgr:matches, r=Dylan-DPC 
use matches!() macro in more places
 2020-12-28 14:13:12 +01:00
Matthias Krüger
d12a358673 use matches!() macro in more places 2020-12-24 13:35:12 +01:00
Matthias Krüger
6e852cc4ce remove redundant clones (clippy::redundant_clone) 2020-12-24 12:59:22 +01:00
Matthew Jasper
2e92b13a60 Prevent caching projections in the case of cycles 
When normalizing a projection which results in a cycle, we would
cache the result of `project_type` without the nested obligations
(because they're not needed for inference). This would result in
the nested obligations only being handled once in fulfill, which
would avoid the cycle error.

Fixes #79714, a regresion from #79305 caused by the removal of
`get_paranoid_cache_value_obligation`.
 2020-12-20 21:47:51 +00:00
bors
b1964e60b7 Auto merge of #80163 - jackh726:binder-refactor-part-3, r=lcnr 
Make BoundRegion have a kind of BoungRegionKind

Split from #76814

Also includes making `replace_escaping_bound_vars` only return `T`

Going to r? `@lcnr`
Feel free to reassign
 2020-12-20 07:01:00 +00:00
bors
0c11b93f5a Auto merge of #79635 - lcnr:const-eval-idk, r=oli-obk 
const_evaluatable_checked: fix occurs check

fixes #79615

this is kind of a hack because we use `TypeRelation` for both the `Generalizer` and the `ConstInferUnifier` but i am not sure if there is a useful way to disentangle this without unnecessarily duplicating some code.

The error in the added test is kind of unavoidable until we erase the unused substs of `ConstKind::Unevaluated`. We talked a bit about this in the cg lazy norm meeting (https://rust-lang.zulipchat.com/#narrow/stream/260443-project-const-generics/topic/lazy_normalization_consts)
 2020-12-20 00:50:46 +00:00
Jack Huey
5e7095850c More rebinds 2020-12-19 04:26:35 -05:00
Jack Huey
af3b1cb0b5 Change potentially_qualified to be defined on Binder<PredicateAtom> 2020-12-18 15:57:12 -05:00
Jack Huey
328fcee4af Make BoundRegion have a kind of BoungRegionKind 2020-12-18 15:27:28 -05:00
Dylan DPC
da89dbb41a
Rollup merge of #80046 - camelid:diag-docs, r=lcnr 
Add more documentation to `Diagnostic` and `DiagnosticBuilder`

cc `@estebank`
 2020-12-18 00:30:20 +01:00
Camelid
10487cd784 Fix typo in method name 
unsuccessfull -> unsuccessful
 2020-12-16 14:59:12 -08:00
Jack Huey
ed80815bf2 Move binder for dyn to each list item 2020-12-11 15:02:46 -05:00
Matthias Krüger
20f8538d1f simplify if let Some(_) = x to if x.is_some() (clippy::redundant_pattern_matching) 2020-12-08 20:27:49 +01:00
Matthias Krüger
1734f9c291 remove redundant clones 2020-12-05 12:59:54 +01:00
Benjamin Peterson
76ff0f408a The details of higher-rank sub are in the rustc book not a doc module. 2020-12-03 23:38:36 -06:00
Bastian Kauschke
806c7281ec add comment to visit_ct_substs 2020-12-02 16:41:01 +01:00
Santiago Pastorino
37354ebc97
Revert "Auto merge of #79209 - spastorino:trait-inheritance-self, r=nikomatsakis" 
This reverts commit 349b3b324d, reversing
changes made to b776d1c3e3.
 2020-12-02 12:19:38 -03:00
Bastian Kauschke
71d7550350 const_evaluatable_checked: fix occurs check 2020-12-02 15:31:27 +01:00
Santiago Pastorino
ada7c1f429
Return FxIndexSet instead of FxHashSet to avoid order errors on different platforms 2020-11-27 18:45:34 -03:00
Santiago Pastorino
28446ef19e
Inline elaborate_trait_refs_that_define_assoc_type into transitive_bounds_that_define_assoc_type 2020-11-27 11:23:52 -03:00
Santiago Pastorino
9e0538bd07
Document elaborate_trait_refs_that_define_assoc_type 2020-11-27 11:23:51 -03:00
Santiago Pastorino
2ca4964db5
Allow to self reference associated types in where clauses 2020-11-27 11:23:47 -03:00
Jonas Schievink
9b2117d1f6
Rollup merge of #77758 - Stupremee:turbofish-help-for-const, r=varkor 
suggest turbofish syntax for uninferred const arguments

When not providing a const generic value, and it can not be inferred, the following suggestion is suggested:
![image](https://user-images.githubusercontent.com/39732259/95616180-af127b80-0a69-11eb-8877-551c815f9627.png)

Resolves #76737

r? ``@varkor``
 2020-11-26 13:39:00 +01:00
Jonas Schievink
ee6f42ba94 Thread Constness through selection 2020-11-22 02:13:53 +01:00
LeSeulArtichaut
f59d03038c Move rustc_ty -> rustc_ty_utils 2020-11-19 21:57:29 +01:00
Justus K
4379a43e46
Suggest turbofish for uninferred const argument 2020-11-18 19:23:22 +01:00
bors
e0ef0fc392 Auto merge of #78779 - LeSeulArtichaut:ty-visitor-return, r=oli-obk 
Introduce `TypeVisitor::BreakTy`

Implements MCP rust-lang/compiler-team#383.
r? `@ghost`
cc `@lcnr` `@oli-obk`

~~Blocked on FCP in rust-lang/compiler-team#383.~~
 2020-11-17 12:24:34 +00:00
lcnr
a6cbd64dae words 2020-11-16 22:42:09 +01:00
Bastian Kauschke
2bf93bd852 compiler: fold by value 2020-11-16 22:34:57 +01:00
LeSeulArtichaut
df6e87cc85 Use TypeVisitor::BreakTy in UnresolvedTypeFinder 2020-11-14 21:20:10 +01:00
LeSeulArtichaut
e0f3119103 Introduce TypeVisitor::BreakTy 2020-11-14 20:25:27 +01:00
Guillaume Gomez
0b7a7930b4
Rollup merge of #78463 - varkor:placeholder-const, r=nikomatsakis 
Add type to `ConstKind::Placeholder`

I simply threaded `<'tcx>` through everything that required it. I'm not sure whether this is the correct thing to do, but it seems to work.

r? `@nikomatsakis`
 2020-11-13 15:26:14 +01:00
varkor
e24a4b4690 Add type to ConstKind::Placeholder 2020-11-12 15:39:55 +00:00
Jonas Schievink
9596e34ad4
Rollup merge of #76765 - guswynn:async_return, r=tmandry 
Make it more clear what an about async fn's returns when referring to what it returns

see #76547

This is *likely* not the ONLY place that this happens to be unclear, but we can move this fn to rustc_middle or something like that and reuse it if need be, to apply it to more diagnostics

One outstanding question I have is, if the fn returns (), should I make the message more clear (what about `fn f()` vs `fn f() -> ()`, can you tell those apart in the hir?)

R? `@tmandry`

`@rustbot` modify labels +A-diagnostics +T-compiler
 2020-11-10 14:45:09 +01:00
Matthias Krüger
bcd2f2df67 fix a couple of clippy warnings: 
filter_next
manual_strip
redundant_static_lifetimes
single_char_pattern
unnecessary_cast
unused_unit
op_ref
redundant_closure
useless_conversion
 2020-11-04 13:48:50 +01:00
LeSeulArtichaut
9433eb83fe Remove implicit Continue type 2020-10-30 12:27:47 +01:00
LeSeulArtichaut
4fe735b320 TypeVisitor: use ControlFlow in rustc_{infer,lint,trait_selection} 2020-10-30 12:27:34 +01:00
Yuki Okushi
a7a0538802
Rollup merge of #78460 - varkor:turbofish-string-generic, r=lcnr 
Adjust turbofish help message for const generics

Types are no longer special. (This message arguably only makes sense with `min_const_generics` or more, but we'll be there soon.)

r? @lcnr
 2020-10-29 12:08:50 +09:00
varkor
a6d01da716 Remove irrelevant FIXME 2020-10-28 10:47:27 +00:00
Esteban Küber
28f02fbf3e Suggest calling await on method call and field access 
When encountering a failing method or field resolution on a `Future`,
look at the `Output` and try the same operation on it. If successful,
suggest calling `.await` on the `Future`.

This had already been introduced in #72784, but at some point they
stopped working.
 2020-10-26 08:11:43 -07:00
Dylan DPC
463b6cc0e1
Rollup merge of #78268 - JohnTitor:issue-78262, r=estebank 
Do not try to report on closures to avoid ICE

Fixes #78262
 2020-10-26 03:09:11 +01:00
Yuki Okushi
7b4c397b73 Do not try to report on closures to avoid ICE 2020-10-25 11:19:49 +09:00
Esteban Küber
f5d7443a6b Suggest semicolon removal and boxing when appropriate 2020-10-23 08:06:41 -07:00
Esteban Küber
c5485115dc Add more .await suggestions on E0308 2020-10-23 08:06:41 -07:00
Esteban Küber
62ba365195 Review comments: use newtype instead of bool 2020-10-23 08:06:41 -07:00
Esteban Küber
671d7c4afb Account for possible boxable impl Future in semicolon removal suggestions 2020-10-23 08:06:13 -07:00
David Tolnay
b0059500f6
Reduce diagram mess in 'match arms have incompatible types' error 2020-10-22 16:16:02 -07:00
Bastian Kauschke
8752a560b9 Lift: take self by value 2020-10-21 23:59:35 +02:00
Esteban Küber
88f5e110db review comments 2020-10-20 09:26:15 -07:00
Esteban Küber
ae0e3d0511 Tweak "object unsafe" errors 
Fix #77598.
 2020-10-20 09:26:14 -07:00
SNCPlay42
c146e8c54f revert workaround #73027 2020-10-19 21:11:40 +01:00
Gus Wynn
20e032e650 Make it more clear when complaining about async fn's return types 2020-10-17 15:57:47 -07:00
Jack Huey
f6a53b4c69 Review comments 2020-10-16 15:14:38 -04:00
Jack Huey
eba10270c6 map_bound_ref -> rebind 2020-10-16 14:29:21 -04:00
Jack Huey
dd5c9bf139 Use map_bound(_ref) instead of Binder::bind when possible 2020-10-16 12:58:50 -04:00
est31
9ed2177d86 Remove unused code from rustc_infer 2020-10-14 04:14:32 +02:00
est31
a0fc455d30 Replace absolute paths with relative ones 
Modern compilers allow reaching external crates
like std or core via relative paths in modules
outside of lib.rs and main.rs.
 2020-10-13 14:16:45 +02:00
Matthew Jasper
d4d9e7f67f Remove unused part of return value from replace_bound_vars_with_placeholders 2020-10-06 11:19:30 +01:00
Matthew Jasper
f958e6c246 Separate bounds and predicates for associated/opaque types 2020-10-06 11:19:29 +01:00
Matthew Jasper
0eb87ed55f Rename projection_predicates to item_bounds 2020-10-06 11:18:45 +01:00
bors
ea7e131435 Auto merge of #77171 - VFLashM:better_sso_structures, r=oli-obk 
Better sso structures

This change greatly expands interface of MiniSet/MiniMap and renames them because they are no longer "Mini".
 2020-10-05 17:18:01 +00:00
Dylan MacKenzie
c4d8089f00 Revert "Add an unused field of type Option<DefId> to ParamEnv struct." 
This reverts commit ab83d372ed.
 2020-09-26 21:01:09 -07:00
Valerii Lashmanov
5c224a484d MiniSet/MiniMap moved and renamed into SsoHashSet/SsoHashMap 
It is a more descriptive name and with upcoming changes
there will be nothing "mini" about them.
 2020-09-26 14:30:05 -05:00
Ralf Jung
9e02642fb3
Rollup merge of #77211 - est31:remove_unused_allow, r=oli-obk 
Remove unused #[allow(...)] statements from compiler/
 2020-09-26 12:58:34 +02:00
Ralf Jung
ac8169dc10
Rollup merge of #77093 - lcnr:const-generics-infer-warning, r=varkor 
merge `need_type_info_err(_const)`

I hoped that this would automatically solve #76737 but it doesn't quite seem like it

fixes #77092

r? @varkor
 2020-09-26 12:58:17 +02:00
Bastian Kauschke
9a607c0a27 unused into 2020-09-26 10:31:34 +02:00
Bastian Kauschke
32195ac8f4 rename functions 2020-09-26 10:28:15 +02:00
est31
12187b7f86 Remove unused #[allow(...)] statements from compiler/ 2020-09-26 01:25:55 +02:00
marmeladema
9f50c49117 Implement Display for DisambiguatedDefPathData and DefPathData 2020-09-25 22:46:15 +01:00
marmeladema
f1878d19fa Move from {{closure}}#0 syntax to {closure#0} for (def) path components 2020-09-25 22:46:14 +01:00
Jonas Schievink
6f3da3d53f
Rollup merge of #77121 - duckymirror:html-root-url, r=jyn514 
Updated html_root_url for compiler crates

Closes #77103

r? @jyn514
 2020-09-25 02:29:45 +02:00
Bastian Kauschke
e5430e5306 the two hardest things in programming, names and... 2020-09-24 22:01:46 +02:00
Erik Hofmayer
138a2e5eaa /nightly/nightly-rustc 2020-09-23 21:51:56 +02:00
Erik Hofmayer
dd66ea2d3d Updated html_root_url for compiler crates 2020-09-23 21:14:43 +02:00
Bastian Kauschke
0e84b61053 use relevant span when unifying ConstVarValues 2020-09-23 11:00:44 +02:00
Bastian Kauschke
3dbfdb0182 use the correct span when dealing with inference variables 2020-09-23 10:44:11 +02:00
Bastian Kauschke
0abb1abf04 unused path 2020-09-23 10:06:32 +02:00
Bastian Kauschke
45d92b43e3 merge need_type_info_err(_const) 2020-09-23 09:24:58 +02:00
Andreas Jonson
6586c37bec Move MiniSet to data_structures 
remove the need for T to be copy from MiniSet as was done for MiniMap
 2020-09-23 08:09:16 +02:00
bors
6d3acf5129 Auto merge of #76928 - lcnr:opaque-types-cache, r=tmandry 
cache types during normalization

partially fixes #75992

reduces the following test from 14 to 3 seconds locally.

cc `@Mark-Simulacrum` would it make sense to add that test to `perf`?
```rust
#![recursion_limit="2048"]
#![type_length_limit="112457564"]

pub async fn h0(v: &String, x: &u64) { println!("{} {}", v, x) }
pub async fn h1(v: &String, x: &u64) { h0(v, x).await }
pub async fn h2(v: &String, x: &u64) { h1(v, x).await }
pub async fn h3(v: &String, x: &u64) { h2(v, x).await }
pub async fn h4(v: &String, x: &u64) { h3(v, x).await }
pub async fn h5(v: &String, x: &u64) { h4(v, x).await }
pub async fn h6(v: &String, x: &u64) { h5(v, x).await }
pub async fn h7(v: &String, x: &u64) { h6(v, x).await }
pub async fn h8(v: &String, x: &u64) { h7(v, x).await }
pub async fn h9(v: &String, x: &u64) { h8(v, x).await }

pub async fn h10(v: &String, x: &u64) { h9(v, x).await }
pub async fn h11(v: &String, x: &u64) { h10(v, x).await }
pub async fn h12(v: &String, x: &u64) { h11(v, x).await }
pub async fn h13(v: &String, x: &u64) { h12(v, x).await }
pub async fn h14(v: &String, x: &u64) { h13(v, x).await }
pub async fn h15(v: &String, x: &u64) { h14(v, x).await }
pub async fn h16(v: &String, x: &u64) { h15(v, x).await }
pub async fn h17(v: &String, x: &u64) { h16(v, x).await }
pub async fn h18(v: &String, x: &u64) { h17(v, x).await }
pub async fn h19(v: &String, x: &u64) { h18(v, x).await }

macro_rules! async_recursive {
    (29, $inner:expr) => { async { async_recursive!(28, $inner) }.await };
    (28, $inner:expr) => { async { async_recursive!(27, $inner) }.await };
    (27, $inner:expr) => { async { async_recursive!(26, $inner) }.await };
    (26, $inner:expr) => { async { async_recursive!(25, $inner) }.await };
    (25, $inner:expr) => { async { async_recursive!(24, $inner) }.await };
    (24, $inner:expr) => { async { async_recursive!(23, $inner) }.await };
    (23, $inner:expr) => { async { async_recursive!(22, $inner) }.await };
    (22, $inner:expr) => { async { async_recursive!(21, $inner) }.await };
    (21, $inner:expr) => { async { async_recursive!(20, $inner) }.await };
    (20, $inner:expr) => { async { async_recursive!(19, $inner) }.await };

    (19, $inner:expr) => { async { async_recursive!(18, $inner) }.await };
    (18, $inner:expr) => { async { async_recursive!(17, $inner) }.await };
    (17, $inner:expr) => { async { async_recursive!(16, $inner) }.await };
    (16, $inner:expr) => { async { async_recursive!(15, $inner) }.await };
    (15, $inner:expr) => { async { async_recursive!(14, $inner) }.await };
    (14, $inner:expr) => { async { async_recursive!(13, $inner) }.await };
    (13, $inner:expr) => { async { async_recursive!(12, $inner) }.await };
    (12, $inner:expr) => { async { async_recursive!(11, $inner) }.await };
    (11, $inner:expr) => { async { async_recursive!(10, $inner) }.await };
    (10, $inner:expr) => { async { async_recursive!(9, $inner) }.await };

    (9, $inner:expr) => { async { async_recursive!(8, $inner) }.await };
    (8, $inner:expr) => { async { async_recursive!(7, $inner) }.await };
    (7, $inner:expr) => { async { async_recursive!(6, $inner) }.await };
    (6, $inner:expr) => { async { async_recursive!(5, $inner) }.await };
    (5, $inner:expr) => { async { async_recursive!(4, $inner) }.await };
    (4, $inner:expr) => { async { async_recursive!(3, $inner) }.await };
    (3, $inner:expr) => { async { async_recursive!(2, $inner) }.await };
    (2, $inner:expr) => { async { async_recursive!(1, $inner) }.await };
    (1, $inner:expr) => { async { async_recursive!(0, $inner) }.await };
    (0, $inner:expr) => { async { h19(&String::from("owo"), &0).await; $inner }.await };
}

async fn f() {
    async_recursive!(14, println!("hello"));
}

fn main() {
    let _ = f();
}
```
r? `@eddyb` requires a perf run.
 2020-09-22 22:52:07 +00:00
ecstatic-morse
dcf4d1f2be
Rollup merge of #76888 - matthiaskrgr:clippy_single_match_2, r=Dylan-DPC 
use if let instead of single match arm expressions

use if let instead of single match arm expressions to compact code and reduce nesting (clippy::single_match)
 2020-09-21 20:40:55 -07:00
bors
45198456be Auto merge of #76913 - vandenheuvel:performance_debug, r=lcnr 
Fixing the performance regression of #76244

Issue https://github.com/rust-lang/rust/issues/74865 suggested that removing the `def_id` field from `ParamEnv` would improve performance. PR https://github.com/rust-lang/rust/pull/76244 implemented this change.

Generally, [results](https://perf.rust-lang.org/compare.html?start=80fc9b0ecb29050d45b17c64af004200afd3cfc2&end=5ef250dd2ad618ee339f165e9b711a1b4746887d) were as expected: an instruction count decrease of about a percent. The instruction count for the unicode crates increased by about 3%, which `@nnethercote` speculated to be caused by a quirk of inlining or codegen. As the results were generally positive, and for chalk integration, this was also a step in the right direction, the PR was r+'d regardless.

However, [wall-time performance results](https://perf.rust-lang.org/compare.html?start=a055c5a1bd95e029e9b31891db63b6dc8258b472&end=7402a394471a6738a40fea7d4f1891666e5a80c5&stat=task-clock) show a much larger performance degradation: 25%, as [mentioned](https://github.com/rust-lang/rust/pull/76244#issuecomment-694459840) by `@Mark-Simulacrum.`

This PR, for now, reverts #76244 and attempts to find out, which change caused the regression.
 2020-09-22 00:22:24 +00:00
Bastian Kauschke
073127a04f check for cycles when unifying const variables 2020-09-21 12:27:55 +02:00
Bram van den Heuvel
ab83d372ed Add an unused field of type Option<DefId> to ParamEnv struct. 2020-09-21 09:39:26 +02:00
bors
41507ed0d5 Auto merge of #76964 - RalfJung:rollup-ybn06fs, r=RalfJung 
Rollup of 15 pull requests

Successful merges:

 - #76722 (Test and fix Send and Sync traits of BTreeMap artefacts)
 - #76766 (Extract some intrinsics out of rustc_codegen_llvm)
 - #76800 (Don't generate bootstrap usage unless it's needed)
 - #76809 (simplfy condition in ItemLowerer::with_trait_impl_ref())
 - #76815 (Fix wording in mir doc)
 - #76818 (Don't compile regex at every function call.)
 - #76821 (Remove redundant nightly features)
 - #76823 (black_box: silence unused_mut warning when building with cfg(miri))
 - #76825 (use `array_windows` instead of `windows` in the compiler)
 - #76827 (fix array_windows docs)
 - #76828 (use strip_prefix over starts_with and manual slicing based on pattern length (clippy::manual_strip))
 - #76840 (Move to intra doc links in core/src/future)
 - #76845 (Use intra docs links in core::{ascii, option, str, pattern, hash::map})
 - #76853 (Use intra-doc links in library/core/src/task/wake.rs)
 - #76871 (support panic=abort in Miri)

Failed merges:

r? `@ghost`
 2020-09-20 11:02:36 +00:00
Ralf Jung
4322e1b92d
Rollup merge of #76821 - est31:remove_redundant_nightly_features, r=oli-obk,Mark-Simulacrum 
Remove redundant nightly features

Removes a bunch of redundant/outdated nightly features. The first commit removes a `core_intrinsics` use for which a stable wrapper has been provided since. The second commit replaces the `const_generics` feature with `min_const_generics` which might get stabilized this year. The third commit is the result of a trial/error run of removing every single feature and then adding it back if compile failed. A bunch of unused features are the result that the third commit removes.
 2020-09-20 12:08:22 +02:00
Matthias Krüger
c690c82ad4 use if let instead of single match arm expressions to compact code and reduce nesting (clippy::single_match) 2020-09-20 11:42:52 +02:00
Bastian Kauschke
1146c39da7 cache types during normalization 2020-09-19 17:27:13 +02:00
Oliver Scherer
888afd50d9 Unify the names of const eval queries and their return types 2020-09-19 10:36:36 +02:00
bors
fdc3405c20 Auto merge of #72412 - VFLashM:issue-72408-nested-closures-exponential, r=tmandry 
Issue 72408 nested closures exponential

This fixes #72408.

Nested closures were resulting in exponential compilation time.

This PR is enhancing asymptotic complexity, but also increasing the constant, so I would love to see perf run results.
 2020-09-18 14:08:39 +00:00
Tyler Mandry
3ccb1c37e6 Remove redundancy in cache key 2020-09-18 09:03:53 +00:00
Valerii Lashmanov
f583513dc2 Intorduced MiniMap - a tiny small storage optimized map implementation 
This makes everything about 1% faster in rustc-perf,
mostly negating performance hit of previous commit.
 2020-09-17 20:44:11 -05:00
Valerii Lashmanov
17d2e3b5d2 Better handling for exponential-sized types in misc places 
Mostly to fix ui/issues/issue-37311-type-length-limit/issue-37311.rs.

Most parts of the compiler can handle deeply nested types with a lot
of duplicates just fine, but some parts still attempt to naively
traverse type tree.

Before such problems were caught by type length limit check,
but now these places will have to be changed to handle
duplicated types gracefully.
 2020-09-17 20:44:11 -05:00
Valerii Lashmanov
2f3296192b Only visit types once when walking the type tree 
This fixes #72408.

Nested closures were resulting in exponential compilation time.

As a performance optimization this change introduces MiniSet,
which is a simple small storage optimized set.
 2020-09-17 20:44:11 -05:00
est31
ebdea01143 Remove redundant #![feature(...)] 's from compiler/ 2020-09-17 07:58:45 +02:00
Tyler Mandry
a6c4d30c7b
Rollup merge of #76756 - matthiaskrgr:cl123ppy, r=Dylan-DPC 
fix a couple of stylistic clippy warnings

namely:

clippy::redundant_pattern_matching
clippy::redundant_pattern
clippy::search_is_some
clippy::filter_next
clippy::into_iter_on_ref
clippy::clone_on_copy
clippy::needless_return
 2020-09-16 12:24:17 -07:00
Dylan DPC
3f9e7fc049
Rollup merge of #76699 - lcnr:const-infer-err, r=varkor 
improve const infer error

cc #72328

reduces it from
```
error[E0282]: type annotations needed
  --> src/main.rs:17:5
   |
17 |     Foo.bar().bar().bar().bar().baz();
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: unable to infer the value of a const parameter
```
to
```
error[E0282]: type annotations needed
  --> $DIR/method-chain.rs:21:33
   |
LL |     Foo.bar().bar().bar().bar().baz();
   |                                 ^^^
   |
   = note: cannot infer the value of the const parameter `N`
```

r? @varkor
 2020-09-16 12:34:21 +02:00
Matthias Krüger
73d4171ea6 fix a couple of stylistic clippy warnings 
namely:

clippy::redundant_pattern_matching
clippy::redundant_pattern
clippy::search_is_some
clippy::filter_next
clippy::into_iter_on_ref
clippy::clone_on_copy
clippy::needless_return
 2020-09-15 22:44:54 +02:00
bors
41dc3942eb Auto merge of #75608 - estebank:suggest-boxed-match-exprs, r=lcnr,varkor 
More structured suggestions for boxed trait objects instead of impl Trait on non-coerceable tail expressions

When encountering a `match` or `if` as a tail expression where the
different arms do not have the same type *and* the return type of that
`fn` is an `impl Trait`, check whether those arms can implement `Trait`
and if so, suggest using boxed trait objects.

Use structured suggestion for `impl T` to `Box<dyn T>`.

Fix https://github.com/rust-lang/rust/issues/69107
 2020-09-14 19:57:57 +00:00
Bastian Kauschke
035f879166 improve const infer err 2020-09-14 10:08:32 +02:00
Bastian Kauschke
dd57275c3e shrink const infer error 2020-09-14 09:45:22 +02:00
bors
7402a39447 Auto merge of #76244 - vandenheuvel:remove__paramenv__def_id, r=nikomatsakis 
Removing the `def_id` field from hot `ParamEnv` to make it smaller

This PR addresses https://github.com/rust-lang/rust/issues/74865.
 2020-09-13 16:28:22 +00:00
Esteban Küber
dc53cfea7e Add test cases and address review comments 2020-09-11 17:05:18 -07:00
Esteban Küber
5d2a935e6c Make suggestion more complete 2020-09-11 17:05:18 -07:00
Esteban Küber
ff297fafbf Make suggestion have a more targetted underline 2020-09-11 17:05:18 -07:00
Esteban Küber
fd9133b9c3 Suggest boxed trait objects in tail match and if expressions 
When encountering a `match` or `if` as a tail expression where the
different arms do not have the same type *and* the return type of that
`fn` is an `impl Trait`, check whether those arms can implement `Trait`
and if so, suggest using boxed trait objects.
 2020-09-11 17:05:18 -07:00
Matthias Krüger
9bb10cc907 use push(char) instead of push_str(&str) to add single chars to strings 
clippy::single-char-push-str
 2020-09-10 13:58:41 +02:00
Matthias Krüger
e11c667e4a don't clone types that are copy (clippy::clone_on_copy) 2020-09-10 13:26:36 +02:00
Bram van den Heuvel
7dad29d686 Remove def_id field from ParamEnv 2020-09-09 10:14:31 +02:00
LeSeulArtichaut
4d28a82c59 ty.flags -> ty.flags() 2020-09-04 18:28:20 +02:00
LeSeulArtichaut
3e14b684dd Change ty.kind to a method 2020-09-04 17:47:51 +02:00
Dan Aloni
75a042e74b Fix some unwanted uses of Debug formatting on user-facing messages 
While formatting for user diagnostics used `Display` for all most cases,
some small amount of cases used `Debug` instead.  Until now, `Display`
and `Debug` yielded the same output for many types. However, with path
trimming, we want to show a shorter path for the user, these cases need
fixing.
 2020-09-02 10:40:10 +03:00
mark
9e5f7d5631 mv compiler to compiler/ 2020-08-30 18:45:07 +03:00