Enum CmdTail 

pub enum CmdTail {
    Semi(EndActiveTok),
    Args {
        first: AppArgErased,
        rest: Vec<AppArgErased>,
        semi: Option<EndActiveTok>,
    },
}

A command’s arguments (narg* sargs in parser.mly, upstream’s own dedicated grammar — not a reuse of the general application chain like AppExpr). Either a bare ; (no arguments) or a flat, non-empty sequence of AppArgs: each is ?: value (a supplied optional narg), ?* (an omitted optional narg), or a plain (possibly !/#access-decorated) atomic value — (expr), (|record|), [list], {inline}, <block>, a bare ctor, etc. — covering both narg’s mandatory forms and sargs’s group forms uniformly (this port’s usual simplification: AppArg::Atom’s Atomic already spans every shape upstream splits across narg/ sargs). Optional/omitted nargs may lead (\ref?:(x){text}, \ref?*{text}) since every element is independently one AppArg — an Expr-based encoding could not, its head being a plain atom.

Variants

Semi(EndActiveTok)

; — no arguments.

Args

The argument chain: at least one AppArg, via super::AppArgErased.

Fields

first: AppArgErased

rest: Vec<AppArgErased>

semi: Option<EndActiveTok>

Trait Implementations

impl Clone for CmdTail

fn clone(&self) -> CmdTail

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CmdTail

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

Formats the value using the given formatter.

impl<__SyanMacro_Atom> Parse<__SyanMacro_Atom> for CmdTail

where __SyanMacro_Atom: Spanned + Clone, EndActiveTok: Parse<__SyanMacro_Atom>, AppArgErased: Parse<__SyanMacro_Atom>, Vec<AppArgErased>: Parse<__SyanMacro_Atom>, Option<EndActiveTok>: 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 CmdTail

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for CmdTail

impl<__SyanMacro_Atom> Unparse<__SyanMacro_Atom> for CmdTail

where EndActiveTok: Unparse<__SyanMacro_Atom>, AppArgErased: Unparse<__SyanMacro_Atom>, Vec<AppArgErased>: Unparse<__SyanMacro_Atom>, Option<EndActiveTok>: Unparse<__SyanMacro_Atom>,

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