Enum syn::Pat

[+] Show declaration

pub enum Pat {
    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)

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A pattern that matches any value: _.

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

Ident(PatIdent)

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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)

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

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

TupleStruct(PatTupleStruct)

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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)

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A path pattern like Color::Red, optionally qualified with a self-type.

Unquailfied path patterns can legally refer to variants, structs, constants or associated constants. Quailfied 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)

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A tuple pattern: (a, b).

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

Box(PatBox)

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A box pattern: box v.

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

Ref(PatRef)

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

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

Lit(PatLit)

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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)

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A range pattern: 1..=2.

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

Slice(PatSlice)

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

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

Macro(PatMacro)

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A macro in expression position.

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

Verbatim(PatVerbatim)

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Tokens in pattern position not interpreted by Syn.

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

Trait Implementations

impl Synom for Pat

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fn parse(i: Cursor) -> PResult<Self>

fn description() -> Option<&'static str>

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A short name of the type being parsed.

impl Clone for Pat

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fn clone(&self) -> Pat

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Returns a copy of the value.

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

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Performs copy-assignment from source.

impl From<PatWild> for Pat

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fn from(e: PatWild) -> Pat

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Performs the conversion.

impl From<PatIdent> for Pat

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fn from(e: PatIdent) -> Pat

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Performs the conversion.

impl From<PatStruct> for Pat

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fn from(e: PatStruct) -> Pat

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Performs the conversion.

impl From<PatTupleStruct> for Pat

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fn from(e: PatTupleStruct) -> Pat

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Performs the conversion.

impl From<PatPath> for Pat

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fn from(e: PatPath) -> Pat

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Performs the conversion.

impl From<PatTuple> for Pat

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fn from(e: PatTuple) -> Pat

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Performs the conversion.

impl From<PatBox> for Pat

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fn from(e: PatBox) -> Pat

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Performs the conversion.

impl From<PatRef> for Pat

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fn from(e: PatRef) -> Pat

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Performs the conversion.

impl From<PatLit> for Pat

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fn from(e: PatLit) -> Pat

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Performs the conversion.

impl From<PatRange> for Pat

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fn from(e: PatRange) -> Pat

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Performs the conversion.

impl From<PatSlice> for Pat

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fn from(e: PatSlice) -> Pat

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Performs the conversion.

impl From<PatMacro> for Pat

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fn from(e: PatMacro) -> Pat

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Performs the conversion.

impl From<PatVerbatim> for Pat

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fn from(e: PatVerbatim) -> Pat

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Performs the conversion.

impl ToTokens for Pat

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

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Write self to the given Tokens.

fn into_tokens(self) -> Tokens

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Convert self directly into a Tokens object.

impl From<Pat> for FnArg

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fn from(e: Pat) -> FnArg

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Performs the conversion.