Function cove_lex 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn cove_lex(
    source: *const u8,
    len: usize,
) -> *mut u8

Lexes source and answers a colour for every part of it, as an answer block. See crate::lex_json.

The one entry point that neither checks nor runs anything: it is the lexer and nothing after it, so it costs a pass over the text. That is what lets a page call it on every keystroke, and it is why a page can call it on its own thread rather than on the worker a run needs — the reason the worker exists is that a Cove program can loop, and lexing cannot.

Safety

As cove_compile.