pub struct TraitDef {
    pub def_id: DefId,
    pub unsafety: Unsafety,
    pub paren_sugar: bool,
    pub has_auto_impl: bool,
    pub is_marker: bool,
    pub skip_array_during_method_dispatch: bool,
    pub specialization_kind: TraitSpecializationKind,
    pub must_implement_one_of: Option<Box<[Ident]>>,
}
Expand description

A trait’s definition with type information.

Fields

def_id: DefIdunsafety: Unsafetyparen_sugar: bool

If true, then this trait had the #[rustc_paren_sugar] attribute, indicating that it should be used with Foo() sugar. This is a temporary thing – eventually any trait will be usable with the sugar (or without it).

has_auto_impl: boolis_marker: bool

If true, then this trait has the #[marker] attribute, indicating that all its associated items have defaults that cannot be overridden, and thus impls of it are allowed to overlap.

skip_array_during_method_dispatch: bool

If true, then this trait has the #[rustc_skip_array_during_method_dispatch] attribute, indicating that editions before 2021 should not consider this trait during method dispatch if the receiver is an array.

specialization_kind: TraitSpecializationKind

Used to determine whether the standard library is allowed to specialize on this trait.

must_implement_one_of: Option<Box<[Ident]>>

List of functions from #[rustc_must_implement_one_of] attribute one of which must be implemented.

Implementations

Trait Implementations

Formats the value using the given formatter. Read more

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more

Immutably borrows from an owned value. Read more

Mutably borrows from an owned value. Read more

This method turns the parameters of a DepNodeConstructor into an opaque Fingerprint to be used in DepNode. Not all DepNodeParams support being turned into a Fingerprint (they don’t need to if the corresponding DepNode is anonymous). Read more

This method tries to recover the query key from the given DepNode, something which is needed when forcing DepNodes during red-green evaluation. The query system will only call this method if fingerprint_style() is not FingerprintStyle::Opaque. It is always valid to return None here, in which case incremental compilation will treat the query as having changed instead of forcing it. Read more

Returns the argument unchanged.

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

The type returned in the event of a conversion error.

Performs the conversion.

The type returned in the event of a conversion error.

Performs the conversion.

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference’s “Type Layout” chapter for details on type layout guarantees.

Size: 32 bytes