rust/tests/ui/destructuring-assignment, branch 1.85.1

Introduce `default_field_values` feature

2024-12-09T21:55:01+00:00

Initial implementation of `#[feature(default_field_values]`, proposed in https://github.com/rust-lang/rfcs/pull/3681. Support default fields in enum struct variant Allow default values in an enum struct variant definition: ```rust pub enum Bar { Foo { bar: S = S, baz: i32 = 42 + 3, } } ``` Allow using `..` without a base on an enum struct variant ```rust Bar::Foo { .. } ``` `#[derive(Default)]` doesn't account for these as it is still gating `#[default]` only being allowed on unit variants. Support `#[derive(Default)]` on enum struct variants with all defaulted fields ```rust pub enum Bar { #[default] Foo { bar: S = S, baz: i32 = 42 + 3, } } ``` Check for missing fields in typeck instead of mir_build. Expand test with `const` param case (needs `generic_const_exprs` enabled). Properly instantiate MIR const The following works: ```rust struct S { a: Vec = Vec::new(), } S:: { .. } ``` Add lint for default fields that will always fail const-eval We *allow* this to happen for API writers that might want to rely on users' getting a compile error when using the default field, different to the error that they would get when the field isn't default. We could change this to *always* error instead of being a lint, if we wanted. This will *not* catch errors for partially evaluated consts, like when the expression relies on a const parameter. Suggestions when encountering `Foo { .. }` without `#[feature(default_field_values)]`: - Suggest adding a base expression if there are missing fields. - Suggest enabling the feature if all the missing fields have optional values. - Suggest removing `..` if there are no missing fields.

Update tests for new TRPL chapter order

2024-11-23T15:57:25+00:00

add third help hint to diagnostic error E0027

2024-10-24T07:17:28+00:00

[AUTO-GENERATED] Migrate ui tests from `//` to `//@` directives

2024-02-16T20:02:50+00:00

Add error code for missing base expression in struct update syntax

2024-01-09T19:25:54+00:00

Support bare unit structs in destructuring assignments

2023-12-08T19:55:07+00:00

Show number in error message even for one error

2023-11-24T18:15:52+00:00

Co-authored-by: Adrian

add more tests

2023-07-17T22:06:32+00:00

add test, bless tests

2023-07-17T22:00:43+00:00

Provide RHS type hint when reporting operator error

2023-04-27T01:34:03+00:00