Enum Type 

#[non_exhaustive]
pub enum Type {
    Array(TypeArray),
    FnPtr(TypeFnPtr),
    Group(TypeGroup),
    ImplTrait(TypeImplTrait),
    Infer(TypeInfer),
    Macro(TypeMacro),
    Never(TypeNever),
    Paren(TypeParen),
    Path(TypePath),
    Ptr(TypePtr),
    Reference(TypeReference),
    Slice(TypeSlice),
    TraitObject(TypeTraitObject),
    Tuple(TypeTuple),
    Verbatim(TokenStream),
}

The possible types that a Rust value could have.

Syntax tree enum

This type is a syntax tree enum.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Array(TypeArray)

A fixed size array type: [T; n].

FnPtr(TypeFnPtr)

A function pointer type: fn(usize) -> bool.

Group(TypeGroup)

A type contained within invisible delimiters.

ImplTrait(TypeImplTrait)

An impl Bound1 + Bound2 + Bound3 type where Bound is a trait or a lifetime.

Infer(TypeInfer)

Indication that a type should be inferred by the compiler: _.

Macro(TypeMacro)

A macro in the type position.

Never(TypeNever)

The never type: !.

Paren(TypeParen)

A parenthesized type equivalent to the inner type.

Path(TypePath)

A path like core::slice::Iter, optionally qualified with a self-type as in <Vec<T> as SomeTrait>::Associated.

Ptr(TypePtr)

A raw pointer type: *const T or *mut T.

Reference(TypeReference)

A reference type: &'a T or &'a mut T.

Slice(TypeSlice)

A dynamically sized slice type: [T].

TraitObject(TypeTraitObject)

A trait object type dyn Bound1 + Bound2 + Bound3 where Bound is a trait or a lifetime.

Tuple(TypeTuple)

A tuple type: (A, B, C, String).

Verbatim(TokenStream)

Tokens in type position not interpreted by Syn.

Important: see Compatibility notes.

Implementations

impl Type

pub fn without_plus(input: ParseStream<'_>) -> Result<Self>

In some positions, types may not contain the + character, to disambiguate them. For example in the expression 1 as T, T may not contain a + character.

This parser does not allow a +, while the default parser does.

Trait Implementations

impl Clone for Type

Available on crate features derive or full only.

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Type

Available on crate features derive or full only.

fn fmt(&self, formatter: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for Type

Available on crate features derive or full only.

impl Hash for Type

Available on crate features derive or full only.

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

where H: Hasher,

Feeds this value into the given Hasher.

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

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Parse for Type

fn parse(input: ParseStream<'_>) -> Result<Self>

impl PartialEq for Type

Available on crate features derive or full only.

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

Equality operator ==.

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

Inequality operator !=.

impl ToTokens for Type

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

Write self to the given TokenStream.

fn to_token_stream(&self) -> TokenStream

Convert self directly into a TokenStream object.

fn into_token_stream(self) -> TokenStream

where Self: Sized,

Convert self directly into a TokenStream object.