The Thrift spec allows you to use namespace *, which means that the IDL applies to all target languages: https://thrift.apache.org/docs/idl#namespace

The parser doesn't currently allow for that, because it treats NamespaceScope as an Identifier, which only allows for alpha numeric characters, dots, and underlines: [a-zA-Z0-9\._].

The solution would be to create a NamespaceScope type, which allows for Identifier | *. This would be a breaking change, though. Because it would changes the AST output.

I'm happy to work on a PR for that, if you are ok with the breaking change, and you don't have any other alternative solution to fix this issue.