bjoernager/rust
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Refactor: VariantIdx::from_u32(0) -> FIRST_VARIANT

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Since structs are always `VariantIdx(0)`, there's a bunch of files where the only reason they had `VariantIdx` or `vec::Idx` imported at all was to get the first variant.

So this uses a constant for that, and adds some doc-comments to `VariantIdx` while I'm there, since it doesn't have any today.
This commit is contained in:
Scott McMurray 2023-03-25 18:43:03 -07:00
parent 96bd50dd47
commit 0439d13176
25 changed files with 80 additions and 78 deletions
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2
compiler/rustc_codegen_cranelift/src/lib.rs
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@ -86,7 +86,7 @@ mod prelude {
self, FloatTy, Instance, InstanceDef, IntTy, ParamEnv, Ty, TyCtxt, TypeAndMut,
TypeFoldable, TypeVisitableExt, UintTy,
};
pub(crate) use rustc_target::abi::{Abi, Scalar, Size, VariantIdx};
pub(crate) use rustc_target::abi::{Abi, Scalar, Size, VariantIdx, FIRST_VARIANT};
pub(crate) use rustc_data_structures::fx::FxHashMap;