Struct TypeDecl 

pub struct TypeDecl {
    pub kw: KwType,
    pub tyvars: Vec<TypeVarTok>,
    pub name: VarTok,
    pub eq: DefEqTok,
    pub body: TypeDeclBody,
    pub ands: Vec<AndTypeClause>,
}

A type declaration, optionally with mutual (and) recursion between several type declarations (parser.mly’s nxvariantdec and-chain, e.g. satysfi-base’s stream.satyg: type 'a state = … and 'a u = ('a state) Promise.t). The head clause is kw..body; every further and-clause is an AndTypeClause. All clauses in one chain are mutually visible — they lower to consecutive UserTypeDecl/UserSynonymDecls, exactly the shape the 0.1 lowering (v1/lower.rs) already produces for type … and …, which the typechecker resolves with the same forward-reference tolerance.

Fields

kw: KwType

tyvars: Vec<TypeVarTok>

name: VarTok

eq: DefEqTok

body: TypeDeclBody

ands: Vec<AndTypeClause>

Trait Implementations

impl Clone for TypeDecl

fn clone(&self) -> TypeDecl

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for TypeDecl

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

Formats the value using the given formatter.

impl<__SyanMacro_Atom> Parse<__SyanMacro_Atom> for TypeDecl

where __SyanMacro_Atom: Spanned + Clone, KwType: Parse<__SyanMacro_Atom>, Vec<TypeVarTok>: Parse<__SyanMacro_Atom>, VarTok: Parse<__SyanMacro_Atom>, DefEqTok: Parse<__SyanMacro_Atom>, TypeDeclBody: Parse<__SyanMacro_Atom>, Vec<AndTypeClause>: 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 TypeDecl

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for TypeDecl

impl<__SyanMacro_Atom> Unparse<__SyanMacro_Atom> for TypeDecl

where KwType: Unparse<__SyanMacro_Atom>, Vec<TypeVarTok>: Unparse<__SyanMacro_Atom>, VarTok: Unparse<__SyanMacro_Atom>, DefEqTok: Unparse<__SyanMacro_Atom>, TypeDeclBody: Unparse<__SyanMacro_Atom>, Vec<AndTypeClause>: Unparse<__SyanMacro_Atom>,

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