[−][src]Enum syntax::ast::PatKind
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Variants
Wild
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Represents a wildcard pattern (_
)
Ident(BindingMode, Ident, Option<P<Pat>>)
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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.
Struct(Path, Vec<Spanned<FieldPat>>, bool)
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A struct or struct variant pattern, e.g. Variant {x, y, ..}
.
The bool
is true
in the presence of a ..
.
TupleStruct(Path, Vec<P<Pat>>, Option<usize>)
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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()
Path(Option<QSelf>, Path)
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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.
Tuple(Vec<P<Pat>>, Option<usize>)
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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()
Box(P<Pat>)
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A box
pattern
Ref(P<Pat>, Mutability)
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A reference pattern, e.g. &mut (a, b)
Lit(P<Expr>)
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A literal
Range(P<Expr>, P<Expr>, Spanned<RangeEnd>)
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A range pattern, e.g. 1...2
, 1..=2
or 1..2
Slice(Vec<P<Pat>>, Option<P<Pat>>, Vec<P<Pat>>)
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[a, b, ..i, y, z]
is represented as:
PatKind::Slice(box [a, b], Some(i), box [y, z])
Paren(P<Pat>)
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Parentheses in patters used for grouping, i.e. (PAT)
.
Mac(Mac)
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A macro pattern; pre-expansion
Trait Implementations
impl Clone for PatKind
[src]
impl Clone for PatKind
fn clone(&self) -> PatKind
[src]
fn clone(&self) -> PatKind
Returns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)
1.0.0[src]
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from source
. Read more
impl Encodable for PatKind
[src]
impl Encodable for PatKind
fn encode<__S: Encoder>(&self, s: &mut __S) -> Result<(), __S::Error>
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fn encode<__S: Encoder>(&self, s: &mut __S) -> Result<(), __S::Error>
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impl Decodable for PatKind
[src]
impl Decodable for PatKind
fn decode<__D: Decoder>(d: &mut __D) -> Result<PatKind, __D::Error>
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fn decode<__D: Decoder>(d: &mut __D) -> Result<PatKind, __D::Error>
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impl Debug for PatKind
[src]
impl Debug for PatKind
Auto Trait Implementations
Blanket Implementations
impl<T> ToOwned for T where
T: Clone,
[src]
impl<T> ToOwned for T where
T: Clone,
type Owned = T
fn to_owned(&self) -> T
[src]
fn to_owned(&self) -> T
Creates owned data from borrowed data, usually by cloning. Read more
fn clone_into(&self, target: &mut T)
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fn clone_into(&self, target: &mut T)
🔬 This is a nightly-only experimental API. (toowned_clone_into
)
recently added
Uses borrowed data to replace owned data, usually by cloning. Read more
impl<T> From for T
[src]
impl<T> From for T
impl<T, U> Into for T where
U: From<T>,
[src]
impl<T, U> Into for T where
U: From<T>,
impl<T, U> TryFrom for T where
T: From<U>,
[src]
impl<T, U> TryFrom for T where
T: From<U>,
type Error = !
try_from
)The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
[src]
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
try_from
)Performs the conversion.
impl<T> Borrow for T where
T: ?Sized,
[src]
impl<T> Borrow for T where
T: ?Sized,
ⓘImportant traits for &'a mut Rfn borrow(&self) -> &T
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fn borrow(&self) -> &T
Immutably borrows from an owned value. Read more
impl<T, U> TryInto for T where
U: TryFrom<T>,
[src]
impl<T, U> TryInto for T where
U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
try_from
)The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
[src]
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
try_from
)Performs the conversion.
impl<T> BorrowMut for T where
T: ?Sized,
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impl<T> BorrowMut for T where
T: ?Sized,
ⓘImportant traits for &'a mut Rfn borrow_mut(&mut self) -> &mut T
[src]
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
impl<T> Any for T where
T: 'static + ?Sized,
[src]
impl<T> Any for T where
T: 'static + ?Sized,
fn get_type_id(&self) -> TypeId
[src]
fn get_type_id(&self) -> TypeId
🔬 This is a nightly-only experimental API. (get_type_id
)
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,
[src]
impl<T> Encodable for T where
T: UseSpecializedEncodable + ?Sized,
fn encode<E>(&self, e: &mut E) -> Result<(), <E as Encoder>::Error> where
E: Encoder,
[src]
fn encode<E>(&self, e: &mut E) -> Result<(), <E as Encoder>::Error> where
E: Encoder,
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impl<T> Decodable for T where
T: UseSpecializedDecodable,
[src]
impl<T> Decodable for T where
T: UseSpecializedDecodable,
fn decode<D>(d: &mut D) -> Result<T, <D as Decoder>::Error> where
D: Decoder,
[src]
fn decode<D>(d: &mut D) -> Result<T, <D as Decoder>::Error> where
D: Decoder,
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impl<E> SpecializationError for E
[src]
impl<E> SpecializationError for E
fn not_found<S, T>(trait_name: &'static str, method_name: &'static str) -> E where
T: ?Sized,
[src]
fn not_found<S, T>(trait_name: &'static str, method_name: &'static str) -> E where
T: ?Sized,
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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> Erased for T
impl<T> Send for T where
T: ?Sized,
[src]
impl<T> Send for T where
T: ?Sized,
impl<T> Sync for T where
T: ?Sized,
[src]
impl<T> Sync for T where
T: ?Sized,
impl<T> Erased for T
impl<T> Erased for T