Enum GenericArgument

#[non_exhaustive]
pub enum GenericArgument {
    Lifetime(Lifetime),
    Type(Type),
    Const(Expr),
    AssocType(AssocType),
    AssocConst(AssocConst),
    Constraint(Constraint),
}

An individual generic argument, like 'a, T, or Item = T.

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(Lifetime)

A lifetime argument.

Type(Type)

A type argument.

Const(Expr)

A const expression. Must be inside of a block.

NOTE: Identity expressions are represented as Type arguments, as they are indistinguishable syntactically.

AssocType(AssocType)

A binding (equality constraint) on an associated type: the Item = u8 in Iterator<Item = u8>.

AssocConst(AssocConst)

An equality constraint on an associated constant: the PANIC = false in Trait<PANIC = false>.

Constraint(Constraint)

An associated type bound: Iterator<Item: Display>.

Trait Implementations

impl Clone for GenericArgument

fn clone(&self) -> Self

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Parse for GenericArgument

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

impl ToTokens for GenericArgument

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: 40 bytes
• Type: 232 bytes
• Const: 184 bytes
• AssocType: 312 bytes
• AssocConst: 272 bytes
• Constraint: 128 bytes