#[non_exhaustive]
pub enum Pat {
}
Expand description
A pattern in a local binding, function signature, match expression, or various other places.
This type is available only if Syn is built with the "full"
feature.
Syntax tree enum
This type is a syntax tree enum.
Variants (Non-exhaustive)
This enum is marked as non-exhaustive
Box(PatBox)
A box pattern: box v
.
Ident(PatIdent)
A pattern that binds a new variable: ref mut binding @ SUBPATTERN
.
Lit(PatLit)
A literal pattern: 0
.
This holds an Expr
rather than a Lit
because negative numbers
are represented as an Expr::Unary
.
Macro(PatMacro)
A macro in pattern position.
Or(PatOr)
A pattern that matches any one of a set of cases.
Path(PatPath)
A path pattern like Color::Red
, optionally qualified with a
self-type.
Unqualified path patterns can legally refer to variants, structs,
constants or associated constants. Qualified path patterns like
<A>::B::C
and <A as Trait>::B::C
can only legally refer to
associated constants.
Range(PatRange)
A range pattern: 1..=2
.
Reference(PatReference)
A reference pattern: &mut var
.
Rest(PatRest)
The dots in a tuple or slice pattern: [0, 1, ..]
Slice(PatSlice)
A dynamically sized slice pattern: [a, b, ref i @ .., y, z]
.
Struct(PatStruct)
A struct or struct variant pattern: Variant { x, y, .. }
.
Tuple(PatTuple)
A tuple pattern: (a, b)
.
TupleStruct(PatTupleStruct)
A tuple struct or tuple variant pattern: Variant(x, y, .., z)
.
Type(PatType)
A type ascription pattern: foo: f64
.
Verbatim(TokenStream)
Tokens in pattern position not interpreted by Syn.
Wild(PatWild)
A pattern that matches any value: _
.
Trait Implementations
sourceimpl From<PatReference> for Pat
impl From<PatReference> for Pat
sourcefn from(e: PatReference) -> Pat
fn from(e: PatReference) -> Pat
Converts to this type from the input type.
sourceimpl From<PatTupleStruct> for Pat
impl From<PatTupleStruct> for Pat
sourcefn from(e: PatTupleStruct) -> Pat
fn from(e: PatTupleStruct) -> Pat
Converts to this type from the input type.
sourceimpl ToTokens for Pat
impl ToTokens for Pat
sourcefn to_tokens(&self, tokens: &mut TokenStream)
fn to_tokens(&self, tokens: &mut TokenStream)
Write self
to the given TokenStream
. Read more
sourcefn to_token_stream(&self) -> TokenStream
fn to_token_stream(&self) -> TokenStream
Convert self
directly into a TokenStream
object. Read more
sourcefn into_token_stream(self) -> TokenStream
fn into_token_stream(self) -> TokenStream
Convert self
directly into a TokenStream
object. Read more
impl Eq for Pat
Auto Trait Implementations
impl RefUnwindSafe for Pat
impl !Send for Pat
impl !Sync for Pat
impl Unpin for Pat
impl UnwindSafe for Pat
Blanket Implementations
sourceimpl<T> BorrowMut<T> for T where
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
sourceimpl<T> Spanned for T where
T: Spanned + ?Sized,
impl<T> Spanned for T where
T: Spanned + ?Sized,
sourcefn span(&self) -> Span
fn span(&self) -> Span
Returns a Span
covering the complete contents of this syntax tree
node, or Span::call_site()
if this node is empty. Read more