Enum rustc_trait_selection::traits::specialization_graph::OverlapMode

source · 
pub enum OverlapMode {
    Stable,
    WithNegative,
    Strict,
}
Expand description

What kind of overlap check are we doing – this exists just for testing and feature-gating purposes.

Variants§

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Stable

The 1.0 rules (either types fail to unify, or where clauses are not implemented for crate-local types)

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WithNegative

Feature-gated test: Stable, or there is an explicit negative impl that rules out one of the where-clauses.

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Strict

Just check for negative impls, not for “where clause not implemented”: used for testing.

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

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 resulting type after obtaining ownership.
Creates owned data from borrowed data, usually by cloning. Read more
Uses borrowed data to replace owned data, usually by cloning. Read more
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: 1 byte

Size for each variant:

  • Stable: 0 bytes
  • WithNegative: 0 bytes
  • Strict: 0 bytes