Enum Header 

pub enum Header {
    Require(HeaderRequireTok),
    Import(HeaderImportTok),
    Stage(HeaderStageTok),
}

@require: / @import: / @stage: header element.

Variants

Require(HeaderRequireTok)

Accepted and currently ignored (driven by the loader crate).

Import(HeaderImportTok)

Accepted and currently ignored (driven by the loader crate).

Stage(HeaderStageTok)

@stage: persistent / @stage: 0 / @stage: 1 — the stage EVERY binding in this file is written at (0.1 says the same thing per binding instead, see TopStage). Unlike Require/Import, this one is HONOURED: elaborate.rs wraps every one of that file’s bindings in Ast::StageScope, so a stage-0 library may use &(…) and the document that requires it may not.

Trait Implementations

impl Clone for Header

fn clone(&self) -> Header

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Header

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

Formats the value using the given formatter.

impl<__SyanMacro_Atom> Parse<__SyanMacro_Atom> for Header

where __SyanMacro_Atom: Spanned + Clone, HeaderRequireTok: Parse<__SyanMacro_Atom>, HeaderImportTok: Parse<__SyanMacro_Atom>, HeaderStageTok: 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 Header

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Header

impl<__SyanMacro_Atom> Unparse<__SyanMacro_Atom> for Header

where HeaderRequireTok: Unparse<__SyanMacro_Atom>, HeaderImportTok: Unparse<__SyanMacro_Atom>, HeaderStageTok: Unparse<__SyanMacro_Atom>,

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