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Print TypeId as a u128 for Debug #127134

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merged 1 commit into from
Jun 30, 2024
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Print TypeId as a u128 for Debug #127134

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13 changes: 12 additions & 1 deletion library/core/src/any.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -602,7 +602,7 @@ impl dyn Any + Send + Sync {
/// While `TypeId` implements `Hash`, `PartialOrd`, and `Ord`, it is worth
/// noting that the hashes and ordering will vary between Rust releases. Beware
/// of relying on them inside of your code!
#[derive(Clone, Copy, Debug, Eq, PartialOrd, Ord)]
#[derive(Clone, Copy, Eq, PartialOrd, Ord)]
#[stable(feature = "rust1", since = "1.0.0")]
pub struct TypeId {
// We avoid using `u128` because that imposes higher alignment requirements on many platforms.
Expand Down Expand Up @@ -644,6 +644,10 @@ impl TypeId {
let t2 = t as u64;
TypeId { t: (t1, t2) }
}

fn as_u128(self) -> u128 {
u128::from(self.t.0) << 64 | u128::from(self.t.1)
}
}

#[stable(feature = "rust1", since = "1.0.0")]
Expand All @@ -666,6 +670,13 @@ impl hash::Hash for TypeId {
}
}

#[stable(feature = "rust1", since = "1.0.0")]
impl fmt::Debug for TypeId {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> Result<(), fmt::Error> {
f.debug_tuple("TypeId").field(&self.as_u128()).finish()
}
}

/// Returns the name of a type as a string slice.
///
/// # Note
Expand Down
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