Struct TypeCmdArgItemV1 

pub struct TypeCmdArgItemV1 {
    pub opts: Option<TypeCmdOptDomV1>,
    pub ty: TyErasedV1,
    pub comma: Option<CommaTok>,
}

One […]-bracketed command-type argument slot: an optional ?(l : τ, …) labeled-optional bundle PREFIX (upstream typ_cmd_arg : option(typ_opt_dom) typ_prod, parser.mly:753-773), then the mandatory τ, (,-separated, last , optional — the ListItem pattern). A full super::TyErasedV1 per slot (permissive superset of upstream’s narrower typ_prod). opts is Option-tried first: a non-?-headed slot fails the ? head with no token stolen, so a plain slot parses opts: None.

Fields

opts: Option<TypeCmdOptDomV1>

ty: TyErasedV1

comma: Option<CommaTok>

Trait Implementations

impl Clone for TypeCmdArgItemV1

fn clone(&self) -> TypeCmdArgItemV1

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for TypeCmdArgItemV1

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

Formats the value using the given formatter.

impl<__SyanMacro_Atom> Parse<__SyanMacro_Atom> for TypeCmdArgItemV1

where __SyanMacro_Atom: Spanned + Clone, Option<TypeCmdOptDomV1>: Parse<__SyanMacro_Atom>, TyErasedV1: Parse<__SyanMacro_Atom>, Option<CommaTok>: 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 TypeCmdArgItemV1

fn eq(&self, other: &TypeCmdArgItemV1) -> bool

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for TypeCmdArgItemV1

impl<__SyanMacro_Atom> Unparse<__SyanMacro_Atom> for TypeCmdArgItemV1

where Option<TypeCmdOptDomV1>: Unparse<__SyanMacro_Atom>, TyErasedV1: Unparse<__SyanMacro_Atom>, Option<CommaTok>: Unparse<__SyanMacro_Atom>,

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