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65 Commits

Author SHA1 Message Date
Deadbeef
fdf7d01088 Improve selection errors for ~const trait bounds 2022-01-26 00:48:01 +11:00
Michael Goulet
b7e4433974 Foreign types are trivially drop 
- Also rename a trivial_const_drop to match style of other functions in
  the util module.
- Also add a test for `const Drop` that doesn't depend on a `~const`
  bound.
- Also comment a bit why we remove the const bound during dropck impl
  check.
 2022-01-19 20:07:04 -08:00
Michael Goulet
0eccd5feef skip some layers in const drop confirmation 2022-01-19 01:28:14 -08:00
Michael Goulet
e3f01b2b6f never type is const Drop 2022-01-19 00:40:05 -08:00
Michael Goulet
6ed42a7ca4 Check const Drop impls considering ConstIfConst bounds 2022-01-18 01:44:46 -08:00
Matthias Krüger
9835b90c91 Rollup merge of #92710 - jackh726:issue-92280, r=nikomatsakis 
Include Projections when elaborating TypeOutlives

Fixes #92280

In `Elaborator`, we elaborate that `Foo<<Bar as Baz>::Assoc>: 'a` -> `<Bar as Baz>::Assoc: 'a`. This is the same rule that would be applied to any other `Param`. If there are escaping vars, we continue to do nothing.

r? `@nikomatsakis`
 2022-01-16 16:58:17 +01:00
Ellen
71bbb603f4 initial revert 2022-01-15 01:16:55 +00:00
Jack Huey
ad57295fc9 Elaborate param_env predicates when checking if type outlives involving projection holds 2022-01-10 00:29:06 -05:00
Deadbeef
77297e5f1c normalize env constness for nested obligations 2021-12-25 00:33:23 +08:00
Deadbeef
84b1d859c8 Revert "Auto merge of #91491 - spastorino:revert-91354, r=oli-obk" 
This reverts commit ff2439b7b9, reversing
changes made to 2a9e0831d6.
 2021-12-12 12:34:46 +08:00
Santiago Pastorino
85b723c4e6 Revert "Auto merge of #91354 - fee1-dead:const_env, r=spastorino" 
This reverts commit 18bb8c61a9, reversing
changes made to d9baa36190.
 2021-12-03 10:11:21 -03:00
Oli Scherer
a9a79f657c Completely remove ConstnessAnd 2021-11-29 21:19:49 +08:00
Oli Scherer
a848c4ba3f Avoid storing the ImplPolarity and Constness next to a TraitRef and use TraitPredicate instead 2021-11-29 21:19:49 +08:00
bors
18cae2680f Auto merge of #88441 - jackh726:closure_norm, r=nikomatsakis 
Normalize obligations for closure confirmation

Based on #90017

Fixes #74261
Fixes #71955
Fixes #88459

r? `@nikomatsakis`
 2021-11-06 01:12:39 +00:00
lcnr
b40aa64e48 stabilize relaxed_struct_unsize 2021-10-30 15:56:02 +02:00
Santiago Pastorino
8b0bfb0dcb Consider negative polarity on overlap check 2021-10-20 12:10:45 -03:00
jackh726
cacc3ee801 Normalize obligations for closure confirmation 2021-10-18 12:35:42 -04:00
Manish Goregaokar
743e842afb Rollup merge of #88963 - fee1-dead:const-iterator, r=oli-obk 
Coerce const FnDefs to implement const Fn traits

You can now pass a FnDef to a function expecting `F` where `F: ~const FnTrait`.

r? ``@oli-obk``

``@rustbot`` label T-compiler F-const_trait_impl
 2021-10-01 14:46:48 -07:00
Oli Scherer
9b5aa063d8 More tracing instrumentation 2021-09-28 12:28:22 +00:00
jackh726
c065f57111 Remove ToPolyTraitRef impl for TraitRef 2021-09-15 22:55:10 -04:00
jackh726
be76bdf905 Remove ToPredicate impls that use Binder::dummy 2021-09-15 20:54:50 -04:00
Deadbeef
f8aa73d3dd Coerce const FnDefs to implement const Fn traits 2021-09-15 11:48:27 +00:00
Deadbeef
a13b13ff46 Const drop selection candidates 2021-09-09 05:21:31 +00:00
Deadbeef
80e1ee5aee Add ty::BoundConstness 2021-08-27 06:49:18 +00:00
lcnr
cc47998e28 add tcx to fn walk 2021-08-26 11:00:30 +02:00
Frank Steffahn
bf88b113ea Fix typos “a”→“an” 2021-08-22 15:35:11 +02:00
Charles Lew
6b1c52ff25 Fold vtable_trait_upcasting_coercion_new_vptr_slot logic into obligation processing. 2021-08-18 13:00:27 +08:00
Charles Lew
1e605023ec Properly generate multiple candidates for trait upcasting coercion. 2021-08-18 13:00:27 +08:00
Charles Lew
fb4e0a0972 Implement trait upcasting coercion type-checking. 2021-07-31 00:51:39 +08:00
Charles Lew
a86d3a7e45 Refactor to make interpreter and codegen backend neutral to vtable internal representation. 2021-06-15 01:59:00 +08:00
Jack Huey
857cb4de20 Make traits with GATs not object safe 2021-04-27 14:34:23 -04:00
Jack Huey
62a49c3bb8 Add tcx lifetime to Binder 2021-03-31 10:13:57 -04:00
Jack Huey
4955d755d3 Some rebinds and dummys 2021-03-31 10:05:32 -04:00
Simon Sapin
696b239f72 Add ptr::Pointee trait (for all types) and ptr::metadata function 
RFC: https://github.com/rust-lang/rfcs/pull/2580
 2021-02-15 14:27:12 +01:00
Bastian Kauschke
031cce8cfc add relaxed_struct_unsize feature gate 2021-02-04 00:00:41 +01:00
Bastian Kauschke
50e394a05e relax adt unsizing requirements 2021-02-04 00:00:28 +01:00
Jack Huey
3dea68de1d Review changes 2021-01-16 18:56:37 -05:00
bors
1b6b06a03a Auto merge of #80132 - matthewjasper:revert-eval-order, r=nikomatsakis 
Revert change to trait evaluation order

This change breaks some code and doesn't appear to enable any new code.

closes #79902

r? `@nikomatsakis`
 2020-12-19 16:20:22 +00:00
Jack Huey
5e7095850c More rebinds 2020-12-19 04:26:35 -05:00
Matthew Jasper
3e31ffda97 Revert change to evaluation order 
This change breaks some code and doesn't appear to enable any new code.
 2020-12-17 20:16:10 +00:00
bors
eb4fc71dc9 Auto merge of #79945 - jackh726:existential_trait_ref, r=nikomatsakis 
Move binder for dyn to each list item

This essentially changes `ty::Binder<&'tcx List<ExistentialTraitRef>>` to `&'tcx List<ty::Binder<ExistentialTraitRef>>`.

This is a first step in moving the `dyn Trait` representation closer to Chalk, which we've talked about in `@rust-lang/wg-traits.`

r? `@nikomatsakis`
 2020-12-17 18:21:20 +00:00
Matthias Krüger
db6c50998c don't clone types that are copy (clippy::clone_on_copy) 2020-12-11 23:02:19 +01:00
Jack Huey
ed80815bf2 Move binder for dyn to each list item 2020-12-11 15:02:46 -05:00
Jonas Schievink
ee6f42ba94 Thread Constness through selection 2020-11-22 02:13:53 +01:00
Bastian Kauschke
2bf93bd852 compiler: fold by value 2020-11-16 22:34:57 +01:00
Matthew Jasper
50dde2e4d8 Normalize when finding trait object candidates 2020-10-22 08:18:29 +01:00
Matthew Jasper
6c43a64931 Fix ICE from projection cycle 
Cycles in normalization can cause evaluations to change from Unknown to
Err. This means that some selection that were applicable no longer are.

To avoid this:
* Selection candidates that are known to be applicable are prefered
  over candidates that are not.
* We don't ICE if a candidate is no longer applicable.
 2020-10-21 19:43:20 +01:00
Matthew Jasper
b8d2560dca Use tracing spans in rustc_trait_selection 2020-10-11 16:08:23 +01:00
Matthew Jasper
022c148fcd Fix tests from rebase 2020-10-06 11:19:33 +01:00
Matthew Jasper
27534b3932 Fix rebase 2020-10-06 11:19:33 +01:00