bjoernager/rust
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Make HasTop and HasBottom consts.

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This commit is contained in:
Camille GILLOT 2023-04-24 17:10:39 +00:00
parent f7b831ac8a
commit 71138e9933
3 changed files with 24 additions and 34 deletions
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20
compiler/rustc_mir_dataflow/src/framework/lattice.rs
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@ -75,12 +75,12 @@ pub trait MeetSemiLattice: Eq {
/// A set that has a "bottom" element, which is less than or equal to any other element.
pub trait HasBottom {
fn bottom() -> Self;
const BOTTOM: Self;
}
/// A set that has a "top" element, which is greater than or equal to any other element.
pub trait HasTop {
fn top() -> Self;
const TOP: Self;
}
/// A `bool` is a "two-point" lattice with `true` as the top element and `false` as the bottom:
@ -113,15 +113,11 @@ impl MeetSemiLattice for bool {
}
impl HasBottom for bool {
fn bottom() -> Self {
false
}
const BOTTOM: Self = false;
}
impl HasTop for bool {
fn top() -> Self {
true
}
const TOP: Self = true;
}
/// A tuple (or list) of lattices is itself a lattice whose least upper bound is the concatenation
@ -274,13 +270,9 @@ impl<T: Clone + Eq> MeetSemiLattice for FlatSet<T> {
}
impl<T> HasBottom for FlatSet<T> {
fn bottom() -> Self {
Self::Bottom
}
const BOTTOM: Self = Self::Bottom;
}
impl<T> HasTop for FlatSet<T> {
fn top() -> Self {
Self::Top
}
const TOP: Self = Self::Top;
}