Error handling has changed, affecting the error variants LCI exports,
and macros are replaced by functions, so all the parsing code has been rewritten.
Nom's custom error type handling isn't great, requiring a lot of
fix_error! macro calls, and even then the complete! macro hardcodes the
error type it expects as u32, so it can't be used and instead the
CompleteStr type needs to be used everywhere.
This will simplify evaluation and catches syntax errors earlier, and
matches the current LOOT implementation's parse-only behaviour more
closely, though that implementation also checks that the parent path is
valid regex, which is pointless.
Oliver Hamlet