Enum SigItem 

pub enum SigItem {
    ValHorzCmd {
        kw: KwVal,
        name: HorzCmdTok,
        colon: ColonTok,
        ty: TypeExpr,
        constraints: Vec<SigConstraint>,
    },
    ValVertCmd {
        kw: KwVal,
        name: VertCmdTok,
        colon: ColonTok,
        ty: TypeExpr,
        constraints: Vec<SigConstraint>,
    },
    Val {
        kw: KwVal,
        name: BindName,
        colon: ColonTok,
        ty: TypeExpr,
        constraints: Vec<SigConstraint>,
    },
    DirectHorzCmd {
        kw: KwDirect,
        name: HorzCmdTok,
        colon: ColonTok,
        ty: TypeExpr,
        constraints: Vec<SigConstraint>,
    },
    DirectVertCmd {
        kw: KwDirect,
        name: VertCmdTok,
        colon: ColonTok,
        ty: TypeExpr,
        constraints: Vec<SigConstraint>,
    },
    Type {
        kw: KwType,
        tyvars: Vec<TypeVarTok>,
        name: VarTok,
        constraints: Vec<SigConstraint>,
    },
}

One nxsigelem. Type parameters/type synonyms on type items are not supported — such input is rejected with a parse error. Each item may carry a trailing constrnts (parser.mly:526-530) — see SigConstraint.

Variants

ValHorzCmd

val \cmd : ty / val +cmd : ty.

Fields

kw: KwVal

name: HorzCmdTok

colon: ColonTok

ty: TypeExpr

constraints: Vec<SigConstraint>

ValVertCmd

Fields

kw: KwVal

name: VertCmdTok

colon: ColonTok

ty: TypeExpr

constraints: Vec<SigConstraint>

Val

val name : ty / val ( ‹op› ) : ty.

Fields

kw: KwVal

name: BindName

colon: ColonTok

ty: TypeExpr

constraints: Vec<SigConstraint>

DirectHorzCmd

direct \cmd : ty / direct +cmd : ty.

Fields

kw: KwDirect

name: HorzCmdTok

colon: ColonTok

ty: TypeExpr

constraints: Vec<SigConstraint>

DirectVertCmd

Fields

kw: KwDirect

name: VertCmdTok

colon: ColonTok

ty: TypeExpr

constraints: Vec<SigConstraint>

Type

type tyvar* name (no synonym).

Fields

kw: KwType

tyvars: Vec<TypeVarTok>

name: VarTok

constraints: Vec<SigConstraint>

Trait Implementations

impl Clone for SigItem

fn clone(&self) -> SigItem

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SigItem

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

Formats the value using the given formatter.

impl<__SyanMacro_Atom> Parse<__SyanMacro_Atom> for SigItem

where __SyanMacro_Atom: Spanned + Clone, KwVal: Parse<__SyanMacro_Atom>, HorzCmdTok: Parse<__SyanMacro_Atom>, ColonTok: Parse<__SyanMacro_Atom>, TypeExpr: Parse<__SyanMacro_Atom>, Vec<SigConstraint>: Parse<__SyanMacro_Atom>, VertCmdTok: Parse<__SyanMacro_Atom>, BindName: Parse<__SyanMacro_Atom>, KwDirect: Parse<__SyanMacro_Atom>, KwType: Parse<__SyanMacro_Atom>, Vec<TypeVarTok>: Parse<__SyanMacro_Atom>, VarTok: Parse<__SyanMacro_Atom>,

type Error = ParseError<<__SyanMacro_Atom as Spanned>::Span>

Every error must be convertible to the universal one, so a field’s failure can become the enclosing type’s failure with no per-field where-predicate. Stating it HERE rather than at each derived impl is what keeps it out of the obligation graph: a per-field <FieldTy as Parse<Atom>>::Error: Into<…> predicate re-creates a projection cycle on a recursive field (E0275), which decycle’s bound-peeling does not break.

fn parse_stream<__SyanMacro_S: ParseStream<Atom = __SyanMacro_Atom>>( __syan_stream: &mut __SyanMacro_S, ) -> Result<Self, Self::Error>

Parse from a reborrowable stream.

fn parse(stream: impl IntoParseStream<Atom = Atom>) -> Result<Self, Self::Error>

Parse from anything that can become a stream — String, TokenStream, an existing stream.

fn attempt(self) -> Attempt<Self>

Wrap this value in Attempt, the atomic-parse marker: parsing an Attempt<Self> parses Self but rewinds the stream on failure (it requires Atom: Clone). This is the value constructor; value.attempt() is sugar for Attempt(value).

impl PartialEq for SigItem

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for SigItem

impl<__SyanMacro_Atom> Unparse<__SyanMacro_Atom> for SigItem

where KwVal: Unparse<__SyanMacro_Atom>, HorzCmdTok: Unparse<__SyanMacro_Atom>, ColonTok: Unparse<__SyanMacro_Atom>, TypeExpr: Unparse<__SyanMacro_Atom>, Vec<SigConstraint>: Unparse<__SyanMacro_Atom>, VertCmdTok: Unparse<__SyanMacro_Atom>, BindName: Unparse<__SyanMacro_Atom>, KwDirect: Unparse<__SyanMacro_Atom>, KwType: Unparse<__SyanMacro_Atom>, Vec<TypeVarTok>: Unparse<__SyanMacro_Atom>, VarTok: Unparse<__SyanMacro_Atom>,

fn unparse<__Syan_Emitter: Emitter<__SyanMacro_Atom>>( &self, __syan_sink: &mut __Syan_Emitter, ) -> Result<(), <__Syan_Emitter as Emitter<__SyanMacro_Atom>>::Error>