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database: use Infallible for non-dup secondary keys (#60)

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hinto-janai 2024-02-13 15:57:29 -05:00 committed by GitHub
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commit ce3c8c5870
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1 changed files with 6 additions and 1 deletions
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7
database/src/key.rs
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@ -69,7 +69,12 @@ macro_rules! impl_key {
impl Key for $t {
const DUPLICATE: bool = false;
type Primary = $t;
type Secondary = $t;
// This 0 variant enum is unconstructable,
// and "has the same role as the ! “never” type":
// <https://doc.rust-lang.org/std/convert/enum.Infallible.html#future-compatibility>.
//
// FIXME: Use the `!` type when stable.
type Secondary = std::convert::Infallible;
#[inline(always)]
fn primary(self) -> Self::Primary {