pub fn lookup(
existing: Option<char>,
mencode: Option<&str>,
description: &str,
) -> Option<Resolved>Expand description
Pure-function lookup used by aozora-lexer’s Phase 3 classifier
to populate borrowed::Gaiji::ucs at construction time.
existing is the short-circuit for callers that already extracted
a codepoint from the source. Pass None to fall through to the
table layers.