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

Fields§

§span: Span

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

§path: Path

Path of the trait, including any type parameters

§skip_path_as_bound: bool

Whether to skip adding the current trait as a bound to the type parameters of the type.

§additional_bounds: Vec<Ty>

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

§supports_unions: bool

Can this trait be derived for unions?

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

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: 144 bytes