Struct RecBinding 

pub struct RecBinding {
    pub name: BindName,
    pub ascription: Option<RecAscription>,
    pub leading_bar: Option<BarTok>,
    pub params: Vec<PatBot>,
    pub eq: DefEqTok,
    pub value: ExprErased,
    pub extra: Vec<RecClause>,
}

One name [: ty] [|] patbot* = value [| patbot* = value]* clause GROUP of a let-rec (also reused, from outside this module, by top-level let-rec). ascription is parser.mly’s rarer COLON ty type-annotated form (recdecargpart’s COLON ty BAR alternative), e.g. the bundled itemize.satyh’s let-rec listing-item : context -> int -> bool -> bool -> itemize -> block-boxes | ctx depth is-first is-last (Item(...)) = ... Parsed but not enforced — there is no enforcement pass for value-level ascriptions (only module val/direct signature items reach typecheck.rs’s command_scheme/sig machinery) — so it is a parse-and-ignore stand-in whose only job is making verbatim upstream source parse. params is patbot* (recdecargpart’s plain argpats form, optionally preceded by a leading_bar — recdecargpart’s BAR argpatlst alternative, used both for the OCaml-style “every clause, including the first, gets a |” layout the bundled packages write, e.g. list.satyg’s let-rec map\n | f [] = []\n | f (x :: xs) = .., and for the COLON ty BAR form above, whose single clause is only reachable via a leading |). extra holds any further | patbot* = value continuation clauses (nxrecdecpar) — SATySFi’s multi-clause pattern-matching function-definition sugar. Every clause in the group must bind the same number of parameters (checked at elaboration — upstream’s IllegalArgumentLength — not here); the (possibly plural) clauses desugar to one curried function that matches a tuple of fresh parameters against each clause’s patterns in turn — see elaborate.rs’s rec_clause_value.

Fields

name: BindName

ascription: Option<RecAscription>

leading_bar: Option<BarTok>

params: Vec<PatBot>

eq: DefEqTok

value: ExprErased

extra: Vec<RecClause>

Trait Implementations

impl Clone for RecBinding

fn clone(&self) -> RecBinding

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RecBinding

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

Formats the value using the given formatter.

impl<__SyanMacro_Atom> Parse<__SyanMacro_Atom> for RecBinding

where __SyanMacro_Atom: Spanned + Clone, BindName: Parse<__SyanMacro_Atom>, Option<RecAscription>: Parse<__SyanMacro_Atom>, Option<BarTok>: Parse<__SyanMacro_Atom>, Vec<PatBot>: Parse<__SyanMacro_Atom>, DefEqTok: Parse<__SyanMacro_Atom>, ExprErased: Parse<__SyanMacro_Atom>, Vec<RecClause>: 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 RecBinding

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for RecBinding

impl<__SyanMacro_Atom> Unparse<__SyanMacro_Atom> for RecBinding

where BindName: Unparse<__SyanMacro_Atom>, Option<RecAscription>: Unparse<__SyanMacro_Atom>, Option<BarTok>: Unparse<__SyanMacro_Atom>, Vec<PatBot>: Unparse<__SyanMacro_Atom>, DefEqTok: Unparse<__SyanMacro_Atom>, ExprErased: Unparse<__SyanMacro_Atom>, Vec<RecClause>: Unparse<__SyanMacro_Atom>,

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