Latest release is missing type definitions

[dummdidumm]

Acorn 8.11.2 seems to have shipped with broken type definitions. Some methods like isIdentifierStart are missing from d.ts files (they exist in the actual JS code though).

[marijnh]

The internal/plugin interfaces are not part of the new type definitions. The old ones accidentally had some of them in there. What kind of thing are you doing that you need isIdentifierStart?

[dummdidumm]

We're using isIdentifierStart and isIdentifierChar inside Svelte's template parser to read identifiers (checking when they start and when they end)

[marijnh]

Are you able to switch to a \p-based regexp ([\p{L}\p{Nl}$_][\p{L}\p{Nl}$\p{Mn}\p{Mc}\p{Nd}\p{Pc}]*) in your parser, or do you target engines that don't have a \p yet?

[RReverser]

@marijnh I believe it can be even simpler with something like /^[\p{ID_Start}$_][\p{ID_Continue}$]$/u.