Update Rust crate strum to 0.27 (release/0.0.2)

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
strum	dependencies	minor	0.24 -> 0.27

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Release Notes

Peternator7/strum (strum)

v0.27.2

Compare Source

• #​141: Adding support for doc comments on EnumDiscriminants generated type.

  • The doc comment will be copied from the variant on the type itself.

• #​435:allow discriminants on empty enum.

• #​443: Change enum table callbacks to FnMut.

• #​444: Add #[automatically_derived] to the impls by @​dandedotdev in #​444

  • This should make the linter less noisy with warnings in generated code.

• #​440: Implement a suffix attribute for serialization of enum variants.

  #[derive(strum::Display)]
  #[strum(suffix=".json")]
  #[strum(serialize_all="snake_case")]
  enum StorageConfiguration {
    PostgresProvider,
    S3StorageProvider,
    AzureStorageProvider,
  }
  
  fn main() {
    let response = SurveyResponse::Other("It was good".into());
    println!("Loading configuration from: {}", StorageConfiguration::PostgresProvider);
    // prints: Loaded Configuration from: postgres_provider.json
  }

• #​446: Drop needless rustversion dependency.

v0.27.1

Compare Source

• #​414: Fix docrs build error.

• #​417: Mention parse_error_ty and parse_error_fn that had been
  left out of the docs accidentally.

• #​421#​331: Implement
  #[strum(transparent)] attribute on IntoStaticStr, Display and AsRefStr that forwards the implmenentation to
  the inner value. Note that for static strings, the inner value must be convertible to an &'static str.

  #[derive(strum::Display)]
  enum SurveyResponse {
    Yes,
    No,
    #[strum(transparent)]
    Other(String)
  }
  
  fn main() {
    let response = SurveyResponse::Other("It was good".into());
    println!("Question: Did you have fun?");
    println!("Answer: {}", response);
    // prints: Answer: It was good
  }

v0.27.0

Compare Source

Highlights

• #​407: Display is now correctly derived in [no_std] projects.
• #​402: EnumIter now implements Send + Sync
• #​400: EnumTryAs now handles attributes on variant fields correctly.
• #​398: strum is now on rust 2021
• #​391: EnumProperties correctly implements get_bool and get_int
  finally. 🎉
• #​380: FromString now supports 2 additional attributes, parse_error_ty
  and parse_error_fn that can be added to use a custom error type rather than the default strum error message.
  • #​410: These attributes accept a Path rather than a String
    to improve behavior with rust-analyzer.

Breaking Changes

• #​384: MSRV is now 1.66.1
• #​391: EnumProperties doesn't provide default implementations anymore.
  This would have required you to manually implement this trait which should be very uncommon.

v0.26.3

Compare Source

• #​344: Hide EnumTable because it's going to be deprecated in the next
  version.
• #​357: Fixes an incompatiblity with itertools by using the fully
  qualified name rather than the inherent method.
• #​345: Allows unnamed tuple like variants to use their variants in
  string interpolation. #[strum(to_string = "Field 0: {0}, Field 1: {1})")] will now work for tuple variants

v0.26.2

Compare Source

• #​337: Fix missing generic impls for EnumTryAs
• #​334: Support prefix in AsRefStr. Technically a breaking change,
  but prefix was just added in 0.26.0 so it's a newer feature and it makes the feature more consisent in general.

v0.26.1

• #​325: use core instead of std in VariantArray.

v0.26.0

Breaking Changes

• The EnumVariantNames macro has been renamed VariantNames. The deprecation warning should steer you in
  the right direction for fixing the warning.
• The Iterator struct generated by EnumIter now has new bounds on it. This shouldn't break code unless you manually
  added the implementation in your code.
• Display now supports format strings using named fields in the enum variant. This should be a no-op for most code.
  However, if you were outputting a string like "Hello {field}", this will now be interpretted as a format string.
• EnumDiscriminant now inherits the repr and discriminant values from your main enum. This makes the discriminant type
  closer to a mirror of the original and that's always the goal.

New features

• The VariantArray macro has been added. This macro adds an associated constant VARIANTS to your enum. The constant
  is a &'static [Self] slice so that you can access all the variants of your enum. This only works on enums that only
  have unit variants.

  use strum::VariantArray;
  
  #[derive(Debug, VariantArray)]
  enum Color {
    Red,
    Blue,
    Green,
  }
  
  fn main() {
    println!("{:?}", Color::VARIANTS); // prints: ["Red", "Blue", "Green"]
  }

• The EnumTable macro has been experimentally added. This macro adds a new type that stores an item for each variant
  of the enum. This is useful for storing a value for each variant of an enum. This is an experimental feature because
  I'm not convinced the current api surface area is correct.

  use strum::EnumTable;
  
  #[derive(Copy, Clone, Debug, EnumTable)]
  enum Color {
    Red,
    Blue,
    Green,
  }
  
  fn main() {
    let mut counts = ColorTable::filled(0);
    for color in &[Color::Red, Color::Red, Color::Green]] {
      counts[color] += 1;
    }
  
    assert_eq!(counts[Color::Red], 2);
    assert_eq!(counts[Color::Blue], 0);
    assert_eq!(counts[Color::Green], 1);
  }

• Display has 2 new features:

  • the strum(prefix = "some_value") attribute on an enum now allows you to prepend a string onto every
    variant when you serialize it.

  • Custom to_string and serialize attributes now support string interopolation on serialization.

PR's Merged

• #​322: avoid collisions on std::fmt::Debug
• #​321: avoid conflicts with consecutive underscores.
• #​314: add additional bounds to EnumIterator
• #​311: add FusedIterator bounds to EnumIterator
• #​297: New macro, add VariantArray
• #​296: adds prefix attribute to To/From String macros.
• #​294: use named enum fields in to_string macro.
• #​288: discriminant enums now inherit the repr from the original enum.
• #​279: Add EnumTable macro to generate a mapping between fieldless variants and data.

v0.25.0

Breaking Changes

• #​261 Upgrade syn dependency to version 2. This bumps the msrv to
  1.56. It's impractical to maintain a package where a core dependency of the ecosystem has a different msrv than this one.

• 270 Change the to_string behavior when using default. Now, when
  using default, the display method will return the display version of the value contained in the enum rather than
  the name of the variant.

  #[derive(strum::Display)]
  enum Color {
    Red,
    Blue,
    Green,
    #[strum(default)]
    Other(String)
  }
  
  fn main() {
    // This used to print "Other", now it prints "Purple"
    assert_eq!(Color::Other("Purple".to_string()).to_string(), "Purple");
  }

  If you want the old behavior, you can use the to_string attribute to override this behavior. See the PR for an example.

• 268 Update the behavior of EnumCount to exclude variants that are
  disabled. This is a breaking change, but the behavior makes it more consistent with other methods.

New Features

• #​257 This PR adds the EnumIs macro that automatically implements
  is_{variant_name} methods for each variant.

  #[derive(EnumIs)]
  enum Color {
      Red,
      Blue,
      Green,
  }
  
  #[test]
  fn simple_test() {
      assert!(Color::Red.is_red());
  }

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