Enum AppArg 

pub enum AppArg {
    Optional {
        q: OptionalTok,
        value: Atomic,
    },
    Omission(OmissionTok),
    Atom {
        stage: Option<StagePrefix>,
        excl: Option<UnopExclamTok>,
        atom: Atomic,
        accesses: Vec<AccessSeg>,
    },
    Ctor(CtorTok),
    Bundled {
        opts: CstOptArgs,
        excl: Option<UnopExclamTok>,
        atom: Atomic,
        accesses: Vec<AccessSeg>,
    },
    BundledCtor {
        opts: CstOptArgs,
        ctor: CtorTok,
    },
}

One application-chain argument: an optional-argument value (?: arg), an omitted optional argument (?*), a plain atomic value (with its own optional ! prefix and #access suffixes, mirroring AppExpr’s head position — each nxunsub/nxbot in the nxapp chain is independent), or a bare constructor applied nullarily (nxapp CONSTRUCTOR).

Variants

Optional

?: arg (nxapp OPTIONAL nxunsub, simplified to a bare Atomic operand rather than the full nxunsub).

Fields

q: OptionalTok

value: Atomic

Omission(OmissionTok)

?* (nxapp OMISSION).

Atom

Fields

stage: Option<StagePrefix>

excl: Option<UnopExclamTok>

atom: Atomic

accesses: Vec<AccessSeg>

Ctor(CtorTok)

Bundled

?(l = e, …) atom — a SATySFi 0.1 labeled-optional application bundle paired with the positional argument it precedes (pairing them in one arm rejects a dangling trailing bundle f x ?(l=1) at parse time, as upstream does). Additive 0.1 node; the ?(-head is token-disjoint from every 0.0.6 AppArg arm (0.0.6’s Optional is ?:-headed, a distinct token), so no previously-parsing input changes shape. Elaboration rejects it under a V0_0 version gate.

Fields

opts: CstOptArgs

excl: Option<UnopExclamTok>

atom: Atomic

accesses: Vec<AccessSeg>

BundledCtor

?(l = e, …) Ctor — as AppArg::Bundled but the positional argument is a bare constructor.

Fields

opts: CstOptArgs

ctor: CtorTok

Trait Implementations

impl Clone for AppArg

fn clone(&self) -> AppArg

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AppArg

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

Formats the value using the given formatter.

impl<__SyanMacro_Atom> Parse<__SyanMacro_Atom> for AppArg

where __SyanMacro_Atom: Spanned + Clone, OptionalTok: Parse<__SyanMacro_Atom>, Atomic: Parse<__SyanMacro_Atom>, OmissionTok: Parse<__SyanMacro_Atom>, Option<StagePrefix>: Parse<__SyanMacro_Atom>, Option<UnopExclamTok>: Parse<__SyanMacro_Atom>, Vec<AccessSeg>: Parse<__SyanMacro_Atom>, CtorTok: Parse<__SyanMacro_Atom>, CstOptArgs: 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 AppArg

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for AppArg

impl<__SyanMacro_Atom> Unparse<__SyanMacro_Atom> for AppArg

where OptionalTok: Unparse<__SyanMacro_Atom>, Atomic: Unparse<__SyanMacro_Atom>, OmissionTok: Unparse<__SyanMacro_Atom>, Option<StagePrefix>: Unparse<__SyanMacro_Atom>, Option<UnopExclamTok>: Unparse<__SyanMacro_Atom>, Vec<AccessSeg>: Unparse<__SyanMacro_Atom>, CtorTok: Unparse<__SyanMacro_Atom>, CstOptArgs: Unparse<__SyanMacro_Atom>,

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