Enum rustc::ty::ClosureKind

pub enum ClosureKind {
    Fn,
    FnMut,
    FnOnce,
}

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Represents the various closure traits in the Rust language. This will determine the type of the environment (self, in the desuaring) argument that the closure expects.

You can get the environment type of a closure using tcx.closure_env_ty().

Variants

Fn

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FnMut

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FnOnce

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Methods

impl<'a, 'tcx> ClosureKind

pub const LATTICE_BOTTOM: ClosureKind

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LATTICE_BOTTOM: ClosureKind = ClosureKind::Fn

pub fn trait_did(&self, tcx: TyCtxt<'a, 'tcx, 'tcx>) -> DefId

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pub fn extends(self, other: ClosureKind) -> bool

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True if this a type that impls this closure kind must also implement other.

pub fn to_ty(self, tcx: TyCtxt<'_, '_, 'tcx>) -> Ty<'tcx>

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Returns the representative scalar type for this closure kind. See TyS::to_opt_closure_kind for more details.

Trait Implementations

impl<'tcx> HashStable<StableHashingContext<'tcx>> for ClosureKind

fn hash_stable<W: StableHasherResult>(
    &self,
    __ctx: &mut StableHashingContext<'tcx>,
    __hasher: &mut StableHasher<W>
)

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impl Clone for ClosureKind

fn clone(&self) -> ClosureKind

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Copy for ClosureKind

impl PartialOrd for ClosureKind

fn partial_cmp(&self, __arg_0: &ClosureKind) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

This method tests less than (for self and other) and is used by the < operator.

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

This method tests less than or equal to (for self and other) and is used by the <= operator.

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

This method tests greater than (for self and other) and is used by the > operator.

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

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl Ord for ClosureKind

fn cmp(&self, __arg_0: &ClosureKind) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

Compares and returns the minimum of two values.

impl PartialEq for ClosureKind

fn eq(&self, __arg_0: &ClosureKind) -> 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 Eq for ClosureKind

impl Hash for ClosureKind

fn hash<__H: Hasher>(&self, __arg_0: &mut __H)

Feeds this value into the given [Hasher].

fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher, 

Feeds a slice of this type into the given [Hasher].

impl Debug for ClosureKind

fn fmt(&self, __arg_0: &mut Formatter) -> Result

Formats the value using the given formatter.

impl Encodable for ClosureKind

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

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impl Decodable for ClosureKind

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

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impl Print for ClosureKind

fn print<F: Write>(&self, f: &mut F, cx: &mut PrintContext) -> Result

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fn print_to_string(&self, cx: &mut PrintContext) -> String

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fn print_display<F: Write>(&self, f: &mut F, cx: &mut PrintContext) -> Result

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fn print_display_to_string(&self, cx: &mut PrintContext) -> String

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fn print_debug<F: Write>(&self, f: &mut F, cx: &mut PrintContext) -> Result

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fn print_debug_to_string(&self, cx: &mut PrintContext) -> String

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impl Display for ClosureKind

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

Formats the value using the given formatter.