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[Merged by Bors] - Derive default for enums where possible #5158

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[Merged by Bors] - Derive default for enums where possible #5158

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rparrett
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Objective

Fixes #5153

Solution

Search for all enums and manually check if they have default impls that can use this new derive.

By my reckoning:

enum num
total 159
has default impl 29
default is unit variant 23

@rparrett rparrett added the C-Code-Quality A section of code that is hard to understand or change label Jun 30, 2022
hymm
hymm approved these changes Jun 30, 2022
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@hymm hymm left a comment

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Changes in the PR look good. I didn't double check if there were any enums that were missed.

@irate-devil
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irate-devil commented Jun 30, 2022 •
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Found a couple that were missed:
https://github.com/rparrett/bevy/blob/c27a3cff6d593e1b1220886673018a508aaa785d/crates/bevy_reflect/bevy_reflect_derive/src/container_attributes.rs#L39
https://github.com/rparrett/bevy/blob/fb813a3a64cdafdd75f7590a461364bcdf34bf2e/crates/bevy_reflect/bevy_reflect_derive/src/field_attributes.rs#L37

james7132
james7132 approved these changes Jun 30, 2022
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Changes look good. Less code is better code.

@james7132 james7132 added the S-Ready-For-Final-Review This PR has been approved by the community. It's ready for a maintainer to consider merging it label Jun 30, 2022
@rparrett
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rparrett commented Jul 1, 2022

Found a couple that were missed: https://github.com/rparrett/bevy/blob/c27a3cff6d593e1b1220886673018a508aaa785d/crates/bevy_reflect/bevy_reflect_derive/src/container_attributes.rs#L39 https://github.com/rparrett/bevy/blob/fb813a3a64cdafdd75f7590a461364bcdf34bf2e/crates/bevy_reflect/bevy_reflect_derive/src/field_attributes.rs#L37

Thanks. Looks like I missed pub(crate) enums. Will do a sweep for those.

@rparrett
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rparrett commented Jul 1, 2022

Of the 10 pub(crate) enums, only those two were relevant.

@alice-i-cecile
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bors r+

bors bot pushed a commit that referenced this pull request Jul 1, 2022
@rparrett
Derive default for enums where possible (#5158)
5e17569 
# Objective

Fixes #5153

## Solution

Search for all enums and manually check if they have default impls that can use this new derive.

By my reckoning:

| enum | num |
|-|-|
| total | 159 |
| has default impl | 29 |
| default is unit variant | 23 |
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bors bot commented Jul 1, 2022

Pull request successfully merged into main.

Build succeeded:

@bors bors bot changed the title Derive default for enums where possible [Merged by Bors] - Derive default for enums where possible Jul 1, 2022
@bors bors bot closed this Jul 1, 2022
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adsick commented Jul 20, 2022

examples on main are not compiling for me because of this, what should I do?

bevy/examples/2d  main ✔                                                                    5h38m
▶ cargo run --example sprite
   Compiling gltf-derive v1.0.0
   Compiling hash32-derive v0.1.1
   Compiling serde v1.0.137
   Compiling thiserror v1.0.31
   Compiling bytemuck v1.9.1
   Compiling bevy_reflect_derive v0.8.0-dev (/Users/anymacstore/rust/bevy/crates/bevy_reflect/bevy_reflect_derive)
   Compiling bevy_derive v0.8.0-dev (/Users/anymacstore/rust/bevy/crates/bevy_derive)
   Compiling bevy_render_macros v0.8.0-dev (/Users/anymacstore/rust/bevy/crates/bevy_render/macros)
error[E0658]: deriving `Default` on enums is experimental
  --> crates/bevy_reflect/bevy_reflect_derive/src/container_attributes.rs:27:17
   |
27 | #[derive(Clone, Default)]
   |                 ^^^^^^^
   |
   = note: see issue #86985 <https://github.com/rust-lang/rust/issues/86985> for more information
   = note: this error originates in the derive macro `Default` (in Nightly builds, run with -Z macro-backtrace for more info)

@alice-i-cecile
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Update your Rust version using rustup update :)

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adsick commented Jul 20, 2022

I've already done it:

bevy/examples/2d  main ✔                                                                   5h39m  ⍉
▶ rustup update
info: syncing channel updates for 'stable-x86_64-apple-darwin'
info: syncing channel updates for 'nightly-x86_64-apple-darwin'
info: checking for self-updates

   stable-x86_64-apple-darwin unchanged - rustc 1.62.1 (e092d0b6b 2022-07-16)
  nightly-x86_64-apple-darwin unchanged - rustc 1.64.0-nightly (9a7b7d5e5 2022-07-19)

info: cleaning up downloads & tmp directories

bevy/examples/2d  main ✔

@alice-i-cecile
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That's very surprising. I would attempt cargo clean + deleting Cargo.lock + cargo update.

If that still fails, I would attempt a minimal reproduction and file a bug with the Rustlang team.

@adsick
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adsick commented Jul 20, 2022

done all these steps and still(

@alice-i-cecile
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Hmm. Perhaps you're running Bevy with an old Rust version via some project specific configuration? I would try a fresh example project, where you just define a toy enum and use this feature.

Either way, I would delete your Bevy folder and clone it again from scratch.

@adsick
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adsick commented Jul 20, 2022

sounds OK, I'll try, thanks

@mockersf
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a few commands to check your rust versions:

  • rustup show shows everything
  • rustup toolchain list shows all toolchains installed
  • rustup overrides list shows if there are overrides from rustup
  • cargo rustc -- --version shows rustc version used by cargo, but I think it needs to compile to work

@adsick
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adsick commented Jul 20, 2022

after some experiments in a minimal example I've realized that there are two versions of Rust on my mac - one is installed in a 'classic' manner and the other via brew package manager. for some reason when I run rustup/cargo --version command it is referring to classic which is brand new, but when I try to compile something it uses that brew version, meh.

solution:

brew uninstall rust

@harudagondi harudagondi mentioned this pull request Aug 7, 2022
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inodentry pushed a commit to IyesGames/bevy that referenced this pull request Aug 8, 2022
@rparrett @inodentry
Derive default for enums where possible (bevyengine#5158)
2c6c0eb 
# Objective

Fixes bevyengine#5153

## Solution

Search for all enums and manually check if they have default impls that can use this new derive.

By my reckoning:

| enum | num |
|-|-|
| total | 159 |
| has default impl | 29 |
| default is unit variant | 23 |
james7132 pushed a commit to james7132/bevy that referenced this pull request Oct 28, 2022
@rparrett @james7132
Derive default for enums where possible (bevyengine#5158)
5cccd1a 
# Objective

Fixes bevyengine#5153

## Solution

Search for all enums and manually check if they have default impls that can use this new derive.

By my reckoning:

| enum | num |
|-|-|
| total | 159 |
| has default impl | 29 |
| default is unit variant | 23 |
ItsDoot pushed a commit to ItsDoot/bevy that referenced this pull request Feb 1, 2023
@rparrett @ItsDoot
Derive default for enums where possible (bevyengine#5158)
a34003e 
# Objective

Fixes bevyengine#5153

## Solution

Search for all enums and manually check if they have default impls that can use this new derive.

By my reckoning:

| enum | num |
|-|-|
| total | 159 |
| has default impl | 29 |
| default is unit variant | 23 |
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Use new enum default method throughout code base
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@rparrett @irate-devil @alice-i-cecile @adsick @mockersf @hymm @james7132