CustomMethod is a bit of a hack to squeeze in an open set of additional methods into our otherwise closed set of methods. It adds a lot of difficulty for this reason: it's not typed in the same way, it can be used as anything, and it generally prevents us from doing anything that relies on knowing all the methods.
I think it would be better to rather also expose an untyped interface to the JSONRPC server. That is, be able to say something like:
addRequestHandler SMethod_TextDocumentCompletion $ \typedParams -> ...
Untyped.addRequestHandler "myMethod" $ \untypedParams -> ...
CustomMethodis a bit of a hack to squeeze in an open set of additional methods into our otherwise closed set of methods. It adds a lot of difficulty for this reason: it's not typed in the same way, it can be used as anything, and it generally prevents us from doing anything that relies on knowing all the methods.I think it would be better to rather also expose an untyped interface to the JSONRPC server. That is, be able to say something like: