Struct AppArgErased 

pub struct AppArgErased(pub Box<AppArg>);

An ast::AppArg behind a stream-erasing parse (see above). Bridges a command tail’s argument chain (CmdTail::Args, below) into AppArg’s own parser without a direct field reference: CmdTail is reached from Expr’s SCC via Atomic::InlineText/BlockText -> InlineElem/BlockElem -> CmdTail, so a direct AppArg field here would close a brand-new cycle back into Atomic (AppArg::Atom.atom: Atomic) entirely through non-root types — the exact “sub-cycle running entirely through non-root types” shape the #[recurse] engine rejects (see PatCons’s doc comment for the same hazard). Routing through this eraser keeps CmdTail a DAG leaf, same as every other cross-reference here.

Tuple Fields

0: Box<AppArg>

Trait Implementations

impl Clone for AppArgErased

fn clone(&self) -> AppArgErased

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AppArgErased

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

Formats the value using the given formatter.

impl Deref for AppArgErased

where Box<AppArg>: Deref,

type Target = <Box<AppArg> as Deref>::Target

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl Deref for AppArgErased

where Box<AppArg>: Deref,

impl Parse<WithSpan<Token, Span>> for AppArgErased

type Error = ParseError<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<S: ParseStream<Atom = Atom>>( stream: &mut 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 AppArgErased

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for AppArgErased

impl Unparse<WithSpan<Token, Span>> for AppArgErased

fn unparse<S: Emitter<Atom>>(&self, sink: &mut S) -> Result<(), S::Error>