Struct StructDeclV1 

pub struct StructDeclV1(pub Box<Decl>);

One declaration inside a sig … end body (list(decl), parser_v1.mly:591) — StructBindV1’s twin, hand-written Parse/ Unparse for the same E0275 reason. ast::Decl lives INSIDE the #[recurse] module and SigExpr → SigBotV1 → StructDeclV1 → Decl → SigExpr is a runtime cycle; naming ast::Decl as a plain derived field of ast::SigBotV1 would re-enter the module’s own SCC analysis. As an opaque leaf it closes that cycle at RUNTIME while keeping both SCCs singletons. NOTE: named after crate::cst::StructDecl (the mechanism), even though it carries a sig-decl, not a struct binding.

Tuple Fields

0: Box<Decl>

Trait Implementations

impl Clone for StructDeclV1

fn clone(&self) -> StructDeclV1

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for StructDeclV1

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

Formats the value using the given formatter.

impl Parse<WithSpan<Token, Span>> for StructDeclV1

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 StructDeclV1

fn eq(&self, other: &StructDeclV1) -> bool

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for StructDeclV1

impl Unparse<WithSpan<Token, Span>> for StructDeclV1

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