Enum rustc_trait_selection::traits::MethodViolationCode

pub enum MethodViolationCode {
    StaticMethod(Option<((String, Span), (String, Span))>),
    ReferencesSelfInput(Option<Span>),
    ReferencesSelfOutput,
    ReferencesImplTraitInTrait(Span),
    AsyncFn,
    WhereClauseReferencesSelf,
    Generic,
    UndispatchableReceiver(Option<Span>),
}

Reasons a method might not be object-safe.

Variants

StaticMethod(Option<((String, Span), (String, Span))>)

e.g., fn foo()

ReferencesSelfInput(Option<Span>)

e.g., fn foo(&self, x: Self)

ReferencesSelfOutput

e.g., fn foo(&self) -> Self

ReferencesImplTraitInTrait(Span)

e.g., fn foo(&self) -> impl Sized

AsyncFn

e.g., async fn foo(&self)

WhereClauseReferencesSelf

e.g., fn foo(&self) where Self: Clone

Generic

e.g., fn foo<A>()

UndispatchableReceiver(Option<Span>)

the method’s receiver (self argument) can’t be dispatched on

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: 72 bytes

Size for each variant:

• StaticMethod: 68 bytes
• ReferencesSelfInput: 12 bytes
• ReferencesSelfOutput: 0 bytes
• ReferencesImplTraitInTrait: 8 bytes
• AsyncFn: 0 bytes
• WhereClauseReferencesSelf: 0 bytes
• Generic: 0 bytes
• UndispatchableReceiver: 12 bytes