Struct Signatures 

pub struct Signatures<'a> { /* private fields */ }

A two-tier signature lookup: a per-document SignatureDb of scanned \newcommand/\newenvironment/xparse definitions consulted first, falling back to the process-wide builtin DB. Cheap to copy (it borrows the scanned DB), so it threads through the formatter’s lowering like a context handle.

Scanned-first matches TeX scoping intuition: a locally (re)defined command shadows a built-in of the same name. (We do not yet model where a definition becomes visible — a whole-file union — which is sound for the formatter’s arity needs; lexical/conditional visibility is out of scope, per AGENTS.md #1.)

Implementations

impl<'a> Signatures<'a>

pub fn new(user: &'a SignatureDb) -> Self

Resolve against user first, then the built-in DB.

pub fn command(&self, name: &str) -> Option<&'a CommandSig>

The signature of command name: scanned definition first, then the curated built-in, then the bulk CWL tier. CWL is consulted last and contributes only argument arity (its behavior flags are all default), so a CWL-only command is laid out like any unknown command, just with its argument count known.

pub fn environment(&self, name: &str) -> Option<&'a EnvironmentSig>

The signature of environment name: scanned, then built-in, then CWL. See command for why the CWL tier is safe to consult here.

Trait Implementations

impl<'a> Clone for Signatures<'a>

fn clone(&self) -> Signatures<'a>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'a> Copy for Signatures<'a>

impl<'a> Debug for Signatures<'a>

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

Formats the value using the given formatter.