Struct AppExpr 

pub struct AppExpr {
    pub minus: Option<ExactMinusTok>,
    pub stage: Option<StagePrefix>,
    pub excl: Option<UnopExclamTok>,
    pub head: Atomic,
    pub head_accesses: Vec<AccessSeg>,
    pub args: Vec<AppArg>,
}

nxun/nxapp/nxunsub flattened: an optional leading unary minus, an optional leading !/!!/… deref (UNOP_EXCLAM, nxunsub), an atomic head with any #label field accesses (nxbot ACCESS var, left-recursive in parser.mly — flattened to a postfix Vec here, the same technique as PatCons’s ::), and an application-chain tail (nxapp nxunsub / nxapp CONSTRUCTOR / nxapp OPTIONAL nxunsub / nxapp OMISSION, left-folded during elaboration). EXACT_AMP/EXACT_TILDE (&/~) are the staging prefixes, carried in stage (see StagePrefix). First-class command references (command \cmd, upstream’s nxapp: COMMAND hcmd) are modeled one level down, as Atomic::Command — see its doc comment for the rationale.

Fields

minus: Option<ExactMinusTok>

stage: Option<StagePrefix>

excl: Option<UnopExclamTok>

head: Atomic

head_accesses: Vec<AccessSeg>

args: Vec<AppArg>

Trait Implementations

impl Clone for AppExpr

fn clone(&self) -> AppExpr

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AppExpr

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

Formats the value using the given formatter.

impl<__SyanMacro_Atom> Parse<__SyanMacro_Atom> for AppExpr

where __SyanMacro_Atom: Spanned + Clone, Option<ExactMinusTok>: Parse<__SyanMacro_Atom>, Option<StagePrefix>: Parse<__SyanMacro_Atom>, Option<UnopExclamTok>: Parse<__SyanMacro_Atom>, Atomic: Parse<__SyanMacro_Atom>, Vec<AccessSeg>: Parse<__SyanMacro_Atom>, Vec<AppArg>: 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 AppExpr

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for AppExpr

impl<__SyanMacro_Atom> Unparse<__SyanMacro_Atom> for AppExpr

where Option<ExactMinusTok>: Unparse<__SyanMacro_Atom>, Option<StagePrefix>: Unparse<__SyanMacro_Atom>, Option<UnopExclamTok>: Unparse<__SyanMacro_Atom>, Atomic: Unparse<__SyanMacro_Atom>, Vec<AccessSeg>: Unparse<__SyanMacro_Atom>, Vec<AppArg>: Unparse<__SyanMacro_Atom>,

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