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>,
}
This is supported on crate features full or derive only.
Expand description

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

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

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

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

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

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

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

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

This is supported on crate feature printing only.

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

Returns a copy of the value. Read more

Performs copy-assignment from source. Read more

Formats the value using the given formatter. Read more

Returns the “default value” for a type. Read more

Feeds this value into the given Hasher. Read more

Feeds a slice of this type into the given Hasher. Read more

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

This method tests for !=.

Write self to the given TokenStream. Read more

Convert self directly into a TokenStream object. Read more

Convert self directly into a TokenStream object. Read more

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

Performs the conversion.

Performs the conversion.

This is supported on crate features parsing and printing only.

Returns a Span covering the complete contents of this syntax tree node, or Span::call_site() if this node is empty. Read more

The resulting type after obtaining ownership.

Creates owned data from borrowed data, usually by cloning. Read more

🔬 This is a nightly-only experimental API. (toowned_clone_into)

recently added

Uses borrowed data to replace owned data, usually by cloning. Read more

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.