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[ty] Require that implementors of Constraints also implement Debug (#20348)

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The debug representation isn't as useful as calling `.display(db)`, but
it's still kind-of annoying when `dbg!()` calls don't compile locally
due to the compiler not being able to guarantee that an object of type
`impl Constraints` implements `Debug`
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Alex Waygood 2025-09-11 14:34:40 +01:00 • committed by GitHub
parent 59c8fda3f8
commit 89f17467ef
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crates/ty_python_semantic/src/types/constraints.rs
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@ -111,7 +111,7 @@ fn incomparable<'db>(db: &'db dyn Db, left: Type<'db>, right: Type<'db>) -> bool
}
/// Encodes the constraints under which a type property (e.g. assignability) holds.
pub(crate) trait Constraints<'db>: Clone + Sized {
pub(crate) trait Constraints<'db>: Clone + Sized + std::fmt::Debug {
/// Returns a constraint set that never holds
fn unsatisfiable(db: &'db dyn Db) -> Self;