pub fn lookup_external<'a>(
functions: &'a [ExternalFunction],
name: &[u8],
argc: usize,
) -> Option<&'a ExternalFunction>Expand description
Returns the registration that answers a call, preferring an exact arity.
SQLite resolves the same way: a function registered for exactly this many arguments wins over one registered for any number, so an application can define both a fast two-argument form and a general one.