Enum devise::syn::Pat

source · [−]

pub enum Pat {
Show 13 variants
    Wild(PatWild),
    Ident(PatIdent),
    Struct(PatStruct),
    TupleStruct(PatTupleStruct),
    Path(PatPath),
    Tuple(PatTuple),
    Box(PatBox),
    Ref(PatRef),
    Lit(PatLit),
    Range(PatRange),
    Slice(PatSlice),
    Macro(PatMacro),
    Verbatim(PatVerbatim),
}

Expand description

A pattern in a local binding, function signature, match expression, or various other places.

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

Syntax tree enum

This type is a syntax tree enum.

Variants

`Wild(PatWild)`

A pattern that matches any value: _.

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

`Ident(PatIdent)`

A pattern that binds a new variable: ref mut binding @ SUBPATTERN.

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

`Struct(PatStruct)`

A struct or struct variant pattern: Variant { x, y, .. }.

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

`TupleStruct(PatTupleStruct)`

A tuple struct or tuple variant pattern: Variant(x, y, .., z).

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

`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.

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

`Tuple(PatTuple)`

A tuple pattern: (a, b).

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

`Box(PatBox)`

A box pattern: box v.

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

`Ref(PatRef)`

A reference pattern: &mut (first, second).

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

`Lit(PatLit)`

A literal pattern: 0.

This holds an Expr rather than a Lit because negative numbers are represented as an Expr::Unary.

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

`Range(PatRange)`

A range pattern: 1..=2.

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

`Slice(PatSlice)`

A dynamically sized slice pattern: [a, b, i.., y, z].

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

`Macro(PatMacro)`

A macro in expression position.

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

`Verbatim(PatVerbatim)`

Tokens in pattern position not interpreted by Syn.

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

Trait Implementations

impl Clone for Pat

fn clone(&self) -> Pat

Returns a copy of the value. Read more

1.0.0 · source

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

Performs copy-assignment from source. Read more

impl Debug for Pat

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

Formats the value using the given formatter. Read more

impl From<Pat> for FnArg

fn from(e: Pat) -> FnArg

Converts to this type from the input type.

impl From<PatBox> for Pat

fn from(e: PatBox) -> Pat

Converts to this type from the input type.

impl From<PatIdent> for Pat

fn from(e: PatIdent) -> Pat

Converts to this type from the input type.

impl From<PatLit> for Pat

fn from(e: PatLit) -> Pat

Converts to this type from the input type.

impl From<PatMacro> for Pat

fn from(e: PatMacro) -> Pat

Converts to this type from the input type.

impl From<PatPath> for Pat

fn from(e: PatPath) -> Pat

Converts to this type from the input type.

impl From<PatRange> for Pat

fn from(e: PatRange) -> Pat

Converts to this type from the input type.

impl From<PatRef> for Pat

fn from(e: PatRef) -> Pat

Converts to this type from the input type.

impl From<PatSlice> for Pat

fn from(e: PatSlice) -> Pat

Converts to this type from the input type.

impl From<PatStruct> for Pat

fn from(e: PatStruct) -> Pat

Converts to this type from the input type.

impl From<PatTuple> for Pat

fn from(e: PatTuple) -> Pat

Converts to this type from the input type.

impl From<PatTupleStruct> for Pat

fn from(e: PatTupleStruct) -> Pat

Converts to this type from the input type.

impl From<PatVerbatim> for Pat

fn from(e: PatVerbatim) -> Pat

Converts to this type from the input type.

impl From<PatWild> for Pat

fn from(e: PatWild) -> Pat

Converts to this type from the input type.

impl Hash for Pat

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

Feeds this value into the given Hasher. Read more

1.3.0 · source

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

Feeds a slice of this type into the given Hasher. Read more

impl Parse for Pat

fn parse(input: &ParseBuffer<'_>) -> Result<Pat, Error>

impl PartialEq<Pat> for Pat

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

This method tests for self and other values to be equal, and is used by ==. Read more

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

This method tests for !=.

impl ToTokens for Pat

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

Write self to the given TokenStream. Read more

fn into_token_stream(self) -> TokenStream

Convert self directly into a TokenStream object. Read more

impl Eq for Pat

impl StructuralEq for Pat

impl StructuralPartialEq 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

impl<T> Any for T where
T: 'static + ?Sized,

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

impl<T> Borrow<T> for T where
T: ?Sized,

const: unstable · source

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T where
T: ?Sized,

const: unstable · source

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

impl<T> From<T> for T

const: unstable · source

fn from(t: T) -> T

Returns the argument unchanged.

impl<T, U> Into<U> for T where
U: From<T>,

const: unstable · source

fn into(self) -> U

Calls U::from(self).

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

impl<T> Spanned for T where
T: ToTokens,

fn span(&self) -> Span

impl<T> Spanned for T where
T: ToTokens,

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

impl<T> ToOwned for T where
T: Clone,

type Owned = T

The resulting type after obtaining ownership.

fn to_owned(&self) -> T

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

fn clone_into(&self, target: &mut T)

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

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

impl<T, U> TryFrom<U> for T where
U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.

impl<T, U> TryInto<U> for T where
U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

const: unstable · source

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.