Enum rustc::ty::Variance

pub enum Variance {
    Covariant,
    Invariant,
    Contravariant,
    Bivariant,
}

🔬 This is a nightly-only experimental API. (rustc_private)

Variants

Covariant

🔬 This is a nightly-only experimental API. (rustc_private)

Invariant

🔬 This is a nightly-only experimental API. (rustc_private)

Contravariant

🔬 This is a nightly-only experimental API. (rustc_private)

Bivariant

🔬 This is a nightly-only experimental API. (rustc_private)

Trait Implementations

impl Clone for Variance

fn clone(&self) -> Variance

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl PartialEq for Variance

fn eq(&self, __arg_0: &Variance) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=.

impl Decodable for Variance

fn decode<__D: Decoder>(__arg_0: &mut __D) -> Result<Variance, __D::Error>

🔬 This is a nightly-only experimental API. (rustc_private)

deprecated in favor of rustc-serialize on crates.io

impl Encodable for Variance

fn encode<__S: Encoder>(&self, __arg_0: &mut __S) -> Result<(), __S::Error>

🔬 This is a nightly-only experimental API. (rustc_private)

deprecated in favor of rustc-serialize on crates.io

impl Copy for Variance

impl Debug for Variance

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.