Enum MathArgBody 

pub enum MathArgBody {
    Math {
        mgrp: MathGroup<()>,
        elems: Vec<MathErased>,
    },
    Inline {
        igrp: InlineGroup<()>,
        elems: Vec<InlineElem>,
    },
    Block {
        bgrp: BlockGroup<()>,
        elems: Vec<BlockElem>,
    },
    ParenEscape {
        paren: ParenGroup<()>,
        inner: Box<ParenBody>,
    },
    ListEscape {
        list: ListGroup<()>,
        items: Vec<ListItem>,
    },
    RecordEscape {
        rec: RecordGroup<()>,
        body: RecordBody,
    },
}

The six body shapes shared by mandatory and ?:-optional math args: a math/inline/block group, or a !-escaped program-mode value. The lexer already switches mode on the escape sigil (!( / ![ / !(| / !{ / !< all emit ordinary LParen/BList/BRecord/BHorzGrp/ BVertGrp tokens — see lexer.rs’s lex_math), so at the token level the escapes are indistinguishable from Atomic’s own Paren/List/Record shapes; reusing those bodies directly here (rather than going through a full ExprErased, which would also happily swallow a following matharg bracket group as a trailing application argument) keeps each matharg exactly one bracket group. NOT Box<MathArg>: a direct self-loop on a non-root type is what #[recurse] rejects, and upstream’s grammar is non-recursive here anyway.

Variants

Math

{ math }.

Fields

mgrp: MathGroup<()>

elems: Vec<MathErased>

Inline

!{ inline text }.

Fields

igrp: InlineGroup<()>

elems: Vec<InlineElem>

Block

!<block text>.

Fields

bgrp: BlockGroup<()>

elems: Vec<BlockElem>

ParenEscape

!(e) / !(e, e, …).

Fields

paren: ParenGroup<()>

inner: Box<ParenBody>

ListEscape

![e; …].

Fields

list: ListGroup<()>

items: Vec<ListItem>

RecordEscape

!(|l = e; …|).

Fields

rec: RecordGroup<()>

body: RecordBody

Trait Implementations

impl Clone for MathArgBody

fn clone(&self) -> MathArgBody

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MathArgBody

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

Formats the value using the given formatter.

impl<__SyanMacro_Atom> Parse<__SyanMacro_Atom> for MathArgBody

where __SyanMacro_Atom: Spanned + Clone, MathGroup<()>: GroupShape<__SyanMacro_Atom>, __SyanSubstructOfOwn_mgrp_MathArgBody_Math_13316143612193599257: Parse<__SyanMacro_Atom>, InlineGroup<()>: GroupShape<__SyanMacro_Atom>, __SyanSubstructOfOwn_igrp_MathArgBody_Inline_13316143612193599257: Parse<__SyanMacro_Atom>, BlockGroup<()>: GroupShape<__SyanMacro_Atom>, __SyanSubstructOfOwn_bgrp_MathArgBody_Block_13316143612193599257: Parse<__SyanMacro_Atom>, ParenGroup<()>: GroupShape<__SyanMacro_Atom>, __SyanSubstructOfOwn_paren_MathArgBody_ParenEscape_13316143612193599257: Parse<__SyanMacro_Atom>, ListGroup<()>: GroupShape<__SyanMacro_Atom>, __SyanSubstructOfOwn_list_MathArgBody_ListEscape_13316143612193599257: Parse<__SyanMacro_Atom>, RecordGroup<()>: GroupShape<__SyanMacro_Atom>, __SyanSubstructOfOwn_rec_MathArgBody_RecordEscape_13316143612193599257: 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 MathArgBody

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for MathArgBody

impl<__SyanMacro_Atom> Unparse<__SyanMacro_Atom> for MathArgBody

where MathGroup<()>: GroupUnparse<__SyanMacro_Atom>, for<'syan_substruct_ref> __SyanSubstructOfRef_mgrp_MathArgBody_Math_13316143612193599257<'syan_substruct_ref>: Unparse<__SyanMacro_Atom>, InlineGroup<()>: GroupUnparse<__SyanMacro_Atom>, for<'syan_substruct_ref> __SyanSubstructOfRef_igrp_MathArgBody_Inline_13316143612193599257<'syan_substruct_ref>: Unparse<__SyanMacro_Atom>, BlockGroup<()>: GroupUnparse<__SyanMacro_Atom>, for<'syan_substruct_ref> __SyanSubstructOfRef_bgrp_MathArgBody_Block_13316143612193599257<'syan_substruct_ref>: Unparse<__SyanMacro_Atom>, ParenGroup<()>: GroupUnparse<__SyanMacro_Atom>, for<'syan_substruct_ref> __SyanSubstructOfRef_paren_MathArgBody_ParenEscape_13316143612193599257<'syan_substruct_ref>: Unparse<__SyanMacro_Atom>, ListGroup<()>: GroupUnparse<__SyanMacro_Atom>, for<'syan_substruct_ref> __SyanSubstructOfRef_list_MathArgBody_ListEscape_13316143612193599257<'syan_substruct_ref>: Unparse<__SyanMacro_Atom>, RecordGroup<()>: GroupUnparse<__SyanMacro_Atom>, for<'syan_substruct_ref> __SyanSubstructOfRef_rec_MathArgBody_RecordEscape_13316143612193599257<'syan_substruct_ref>: Unparse<__SyanMacro_Atom>,

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