Enum WherePredicate

#[non_exhaustive]
pub enum WherePredicate {
    Lifetime(PredicateLifetime),
    Type(PredicateType),
}

A single predicate in a where clause: T: Deserialize<'de>.

Syntax tree enum

This type is a syntax tree enum.

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.

Lifetime(PredicateLifetime)

A lifetime predicate in a where clause: 'a: 'b + 'c.

Type(PredicateType)

A type predicate in a where clause: for<'c> Foo<'c>: Trait<'c>.

Trait Implementations

impl Clone for WherePredicate

fn clone(&self) -> Self

Returns a copy of the value.

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

Performs copy-assignment from source.

impl From<PredicateLifetime> for WherePredicate

fn from(e: PredicateLifetime) -> WherePredicate

Converts to this type from the input type.

impl From<PredicateType> for WherePredicate

fn from(e: PredicateType) -> WherePredicate

Converts to this type from the input type.

impl Parse for WherePredicate

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

impl ToTokens for WherePredicate

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.

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: 312 bytes

Size for each variant:

• Lifetime: 80 bytes
• Type: 312 bytes