Struct syn::Generics[][src]

pub struct Generics {
    pub lt_token: Option<Lt>,
    pub params: Punctuated<GenericParam, Comma>,
    pub gt_token: Option<Gt>,
    pub where_clause: Option<WhereClause>,
}

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

This type is available only if Syn is built with the "derive" or "full" feature.

Fields

lt_token: Option<Lt>params: Punctuated<GenericParam, Comma>gt_token: Option<Gt>where_clause: Option<WhereClause>

Implementations

impl Generics[src]

pub fn type_params(&self) -> TypeParams<'_>[src]

Returns an Iterator<Item = &TypeParam> over the type parameters in self.params.

pub fn type_params_mut(&mut self) -> TypeParamsMut<'_>[src]

Returns an Iterator<Item = &mut TypeParam> over the type parameters in self.params.

pub fn lifetimes(&self) -> Lifetimes<'_>[src]

Returns an Iterator<Item = &LifetimeDef> over the lifetime parameters in self.params.

pub fn lifetimes_mut(&mut self) -> LifetimesMut<'_>[src]

Returns an Iterator<Item = &mut LifetimeDef> over the lifetime parameters in self.params.

pub fn const_params(&self) -> ConstParams<'_>[src]

Returns an Iterator<Item = &ConstParam> over the constant parameters in self.params.

pub fn const_params_mut(&mut self) -> ConstParamsMut<'_>[src]

Returns an Iterator<Item = &mut ConstParam> over the constant parameters in self.params.

pub fn make_where_clause(&mut self) -> &mut WhereClause[src]

Initializes an empty where-clause if there is not one present already.

impl Generics[src]

pub fn split_for_impl(
    &self
) -> (ImplGenerics<'_>, TypeGenerics<'_>, Option<&WhereClause>)
[src]

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 {
        // ...
    }
}

This method is available only if Syn is built with the "derive" or "full" feature and the "printing" feature.

Trait Implementations

impl Clone for Generics[src]

impl Debug for Generics[src]

impl Default for Generics[src]

impl Eq for Generics[src]

impl Hash for Generics[src]

impl Parse for Generics[src]

impl PartialEq<Generics> for Generics[src]

impl ToTokens for Generics[src]

Auto Trait Implementations

impl RefUnwindSafe for Generics

impl !Send for Generics

impl !Sync for Generics

impl Unpin for Generics

impl UnwindSafe for Generics

Blanket Implementations

impl<T> Any for T where
    T: 'static + ?Sized
[src]

impl<T> Borrow<T> for T where
    T: ?Sized
[src]

impl<T> BorrowMut<T> for T where
    T: ?Sized
[src]

impl<T> From<T> for T[src]

impl<T, U> Into<U> for T where
    U: From<T>, 
[src]

impl<T> Spanned for T where
    T: Spanned + ?Sized
[src]

impl<T> ToOwned for T where
    T: Clone
[src]

type Owned = T

The resulting type after obtaining ownership.

impl<T, U> TryFrom<U> for T where
    U: Into<T>, 
[src]

type Error = Infallible

The type returned in the event of a conversion error.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, 
[src]

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.