Enum syn::Type

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#[non_exhaustive]
pub enum Type {

Show 15 variants    Array(TypeArray),
    BareFn(TypeBareFn),
    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),

}
Available on crate features full or derive only.
Expand description

The possible types that a Rust value could have.

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

Syntax tree enum

This type is a syntax tree enum.

Variants (Non-exhaustive)

This enum is marked as 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].

BareFn(TypeBareFn)

A bare function 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 std::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.

Implementations

Available on crate feature parsing only.

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

Returns a copy of the value. Read more

Performs copy-assignment from source. Read more

Converts to this type from the input type.

Converts to this type from the input type.

Converts to this type from the input type.

Converts to this type from the input type.

Converts to this type from the input type.

Converts to this type from the input type.

Converts to this type from the input type.

Converts to this type from the input type.

Converts to this type from the input type.

Converts to this type from the input type.

Converts to this type from the input type.

Converts to this type from the input type.

Converts to this type from the input type.

Converts to this type from the input type.

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

Returns the argument unchanged.

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

Available 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

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.