Enum TypeParamBound

#[non_exhaustive]
pub enum TypeParamBound {
    Trait(TraitBound),
    Lifetime(Lifetime),
    PreciseCapture(PreciseCapture),
    Verbatim(TokenStream),
}

Available on crate features full or derive only.

A trait or lifetime used as a bound on a type parameter.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Trait(TraitBound)

Lifetime(Lifetime)

PreciseCapture(PreciseCapture)

Verbatim(TokenStream)

Trait Implementations

impl Clone for TypeParamBound

Available on crate feature clone-impls only.

fn clone(&self) -> Self

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for TypeParamBound

Available on crate feature extra-traits only.

fn fmt(&self, formatter: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl From<Lifetime> for TypeParamBound

fn from(e: Lifetime) -> TypeParamBound

Converts to this type from the input type.

impl From<PreciseCapture> for TypeParamBound

fn from(e: PreciseCapture) -> TypeParamBound

Converts to this type from the input type.

impl From<TraitBound> for TypeParamBound

fn from(e: TraitBound) -> TypeParamBound

Converts to this type from the input type.

impl Hash for TypeParamBound

Available on crate feature extra-traits only.

fn hash<H>(&self, state: &mut H)

where H: Hasher,

Feeds this value into the given Hasher.

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

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Parse for TypeParamBound

Available on crate feature parsing only.

fn parse(input: ParseStream<'_>) -> Result<Self>

impl PartialEq for TypeParamBound

Available on crate feature extra-traits only.

fn eq(&self, other: &Self) -> bool

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl ToTokens for TypeParamBound

Available on crate feature printing only.

fn to_tokens(&self, tokens: &mut TokenStream)

Write self to the given TokenStream.

fn to_token_stream(&self) -> TokenStream

Convert self directly into a TokenStream object.

fn into_token_stream(self) -> TokenStream

where Self: Sized,

Convert self directly into a TokenStream object.

impl Eq for TypeParamBound

Available on crate feature extra-traits only.

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: 120 bytes

Size for each variant:

• Trait: 120 bytes
• Lifetime: 40 bytes
• PreciseCapture: 56 bytes
• Verbatim: 40 bytes