[][src]Enum syntax::ast::PatKind

pub enum PatKind {
    Wild,
    Ident(BindingModeIdentOption<P<Pat>>),
    Struct(PathVec<Spanned<FieldPat>>, bool),
    TupleStruct(PathVec<P<Pat>>, Option<usize>),
    Path(Option<QSelf>, Path),
    Tuple(Vec<P<Pat>>, Option<usize>),
    Box(P<Pat>),
    Ref(P<Pat>, Mutability),
    Lit(P<Expr>),
    Range(P<Expr>, P<Expr>, Spanned<RangeEnd>),
    Slice(Vec<P<Pat>>, Option<P<Pat>>, Vec<P<Pat>>),
    Paren(P<Pat>),
    Mac(Mac),
}
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Variants

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Represents a wildcard pattern (_)

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A PatKind::Ident may either be a new bound variable (ref mut binding @ OPT_SUBPATTERN), or a unit struct/variant pattern, or a const pattern (in the last two cases the third field must be None). Disambiguation cannot be done with parser alone, so it happens during name resolution.

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A struct or struct variant pattern, e.g. Variant {x, y, ..}. The bool is true in the presence of a ...

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A tuple struct/variant pattern Variant(x, y, .., z). If the .. pattern fragment is present, then Option<usize> denotes its position. 0 <= position <= subpats.len()

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A possibly qualified path pattern. Unqualified path patterns A::B::C can legally refer to variants, structs, constants or associated constants. Qualified path patterns <A>::B::C/<A as Trait>::B::C can only legally refer to associated constants.

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A tuple pattern (a, b). If the .. pattern fragment is present, then Option<usize> denotes its position. 0 <= position <= subpats.len()

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A box pattern

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A reference pattern, e.g. &mut (a, b)

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A literal

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A range pattern, e.g. 1...2, 1..=2 or 1..2

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[a, b, ..i, y, z] is represented as: PatKind::Slice(box [a, b], Some(i), box [y, z])

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Parentheses in patters used for grouping, i.e. (PAT).

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A macro pattern; pre-expansion

Trait Implementations

impl Clone for PatKind
[src]

Returns a copy of the value. Read more

Performs copy-assignment from source. Read more

impl Encodable for PatKind
[src]

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impl Decodable for PatKind
[src]

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impl Debug for PatKind
[src]

Formats the value using the given formatter. Read more

Auto Trait Implementations

impl !Send for PatKind

impl !Sync for PatKind

Blanket Implementations

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

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

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recently added

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

impl<T> From for T
[src]

Performs the conversion.

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

Performs the conversion.

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

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The type returned in the event of a conversion error.

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

Performs the conversion.

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

Important traits for &'a mut R

Immutably borrows from an owned value. Read more

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

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The type returned in the event of a conversion error.

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Performs the conversion.

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

Important traits for &'a mut R

Mutably borrows from an owned value. Read more

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

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this method will likely be replaced by an associated static

Gets the TypeId of self. Read more

impl<T> Encodable for T where
    T: UseSpecializedEncodable + ?Sized
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impl<T> Decodable for T where
    T: UseSpecializedDecodable
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impl<E> SpecializationError for E
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Create an error for a missing method specialization. Defaults to panicking with type, trait & method names. S is the encoder/decoder state type, T is the type being encoded/decoded, and the arguments are the names of the trait and method that should've been overridden. Read more

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

impl<T> Sync for T where
    T: ?Sized
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impl<T> Erased for T