Struct StructDecl 

pub struct StructDecl(pub Box<TopBinding>);

One declaration inside a module ... = struct ... end body (nxstruct). nxstruct’s alternatives are a strict subset of nxtoplevel’s (every form it has, TopBinding also has, once Module/Open are added), so this simply re-parses a TopBinding — but not by naming TopBinding as a field type directly: TopBinding lives outside the #[recurse] module, so TopBinding -> Module -> Vec<StructDecl> -> TopBinding would be a self-recursive cycle through a plain #[derive(Parse)], which (without the #[recurse] engine to back it) is an E0275 hazard (an unbounded recursive trait-bound obligation). Hand-writing Parse/Unparse here — the same trick as ExprErased et al. — sidesteps that: the impl has no recursive where-bound for the compiler to try to satisfy, it just calls TopBinding::parse through the stream-erasing adapter at runtime.

Tuple Fields

0: Box<TopBinding>

Trait Implementations

impl Clone for StructDecl

fn clone(&self) -> StructDecl

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for StructDecl

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

Formats the value using the given formatter.

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

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 StructDecl

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for StructDecl

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

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