Struct syn::Generics

[+] Show declaration

pub struct Generics {
    pub lifetimes: Vec<LifetimeDef>,
    pub ty_params: Vec<TyParam>,
    pub where_clause: WhereClause,
}

[−] Expand description

Represents lifetimes and type parameters attached to a declaration of a function, enum, trait, etc.

Fields

lifetimes: Vec<LifetimeDef>

ty_params: Vec<TyParam>

where_clause: WhereClause

Methods

impl Generics

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pub fn split_for_impl(&self) -> (ImplGenerics, TyGenerics, &WhereClause)

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Split a type's generics into the pieces required for impl'ing a trait for that type.

let (impl_generics, ty_generics, where_clause) = generics.split_for_impl();
quote! {
    impl #impl_generics MyTrait for #name #ty_generics #where_clause {
        // ...
    }
}

Trait Implementations

impl ToTokens for Generics

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

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Write self to the given Tokens.

impl Debug for Generics

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fn fmt(&self, f: &mut Formatter) -> Result

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Formats the value using the given formatter.

impl Clone for Generics

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fn clone(&self) -> Generics

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Returns a copy of the value.

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

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Performs copy-assignment from source.

impl Eq for Generics

impl PartialEq for Generics

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

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This method tests for self and other values to be equal, and is used by ==.

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

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This method tests for !=.

impl Default for Generics

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fn default() -> Generics

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Returns the "default value" for a type.

impl Hash for Generics

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

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Feeds this value into the given [Hasher].

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

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Feeds a slice of this type into the given [Hasher].