pub struct TraitDef<'a> {
    pub span: Span,
    pub path: Path,
    pub additional_bounds: Vec<Ty>,
    pub generics: Bounds,
    pub supports_unions: bool,
    pub methods: Vec<MethodDef<'a>>,
    pub associated_types: Vec<(Ident, Ty)>,
}

Fields

span: Span

The span for the current #[derive(Foo)] header.

path: Path

Path of the trait, including any type parameters

additional_bounds: Vec<Ty>

Additional bounds required of any type parameters of the type, other than the current trait

generics: Bounds

Any extra lifetimes and/or bounds, e.g., D: serialize::Decoder

supports_unions: bool

Can this trait be derived for unions?

methods: Vec<MethodDef<'a>>associated_types: Vec<(Ident, Ty)>

Implementations

Given that we are deriving a trait DerivedTrait for a type like:

struct Struct<'a, ..., 'z, A, B: DeclaredTrait, C, ..., Z> where C: WhereTrait {
    a: A,
    b: B::Item,
    b1: <B as DeclaredTrait>::Item,
    c1: <C as WhereTrait>::Item,
    c2: Option<<C as WhereTrait>::Item>,
    ...
}

create an impl like:

impl<'a, ..., 'z, A, B: DeclaredTrait, C, ... Z> where
    C:                       WhereTrait,
    A: DerivedTrait + B1 + ... + BN,
    B: DerivedTrait + B1 + ... + BN,
    C: DerivedTrait + B1 + ... + BN,
    B::Item:                 DerivedTrait + B1 + ... + BN,
    <C as WhereTrait>::Item: DerivedTrait + B1 + ... + BN,
    ...
{
    ...
}

where B1, …, BN are the bounds given by bounds_paths.’. Z is a phantom type, and therefore does not get bound by the derived trait.

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more
Immutably borrows from an owned value. Read more
Mutably borrows from an owned value. Read more

Returns the argument unchanged.

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

The type returned in the event of a conversion error.
Performs the conversion.
The type returned in the event of a conversion error.
Performs the conversion.

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: 168 bytes