ante-ls goto definition

[ehllie]

Implements goto definition capability, and prevents the ls from panicking when the open document is empty. Also refactoring of utility functions to a separate module.

[jfecher]

LGTM, thank you once again!

[jfecher]

@ehllie do you mind tackling the Send errors with the futures next? Since one of the previous PRs I've been getting many of the following errors when building ante-ls:

error: future cannot be sent between threads safely
   --> ante-ls/src/main.rs:66:65
    |
66  |       async fn did_save(&self, params: DidSaveTextDocumentParams) {
    |  _________________________________________________________________^
67  | |         self.client.log_message(MessageType::LOG, format!("ante-ls did_save: {:?}", params)).await;
68  | |         if let Some(text) = params.text {
69  | |             let rope = Rope::from_str(&text);
...   |
74  | |         };
75  | |     }
    | |_____^ future created by async block is not `Send`
    |
    = help: the trait `Sync` is not implemented for `UnsafeCell<ante::parser::ast::Ast<'_>>`

[jfecher]

Ah, never mind. I did a get reset without also stashing. Should not have merged this PR. I'm going to revert this, then can you fix the compiler errors? I'm going to add a CI test that ante-ls builds as well since it seems it is not being checked.

[ehllie]

@ehllie do you mind tackling the Send errors with the futures next? Since one of the previous PRs I've been getting many of the following errors when building ante-ls:

error: future cannot be sent between threads safely
   --> ante-ls/src/main.rs:66:65
    |
66  |       async fn did_save(&self, params: DidSaveTextDocumentParams) {
    |  _________________________________________________________________^
67  | |         self.client.log_message(MessageType::LOG, format!("ante-ls did_save: {:?}", params)).await;
68  | |         if let Some(text) = params.text {
69  | |             let rope = Rope::from_str(&text);
...   |
74  | |         };
75  | |     }
    | |_____^ future created by async block is not `Send`
    |
    = help: the trait `Sync` is not implemented for `UnsafeCell<ante::parser::ast::Ast<'_>>`

That's odd, I did not get any errors while building ante-ls. What rustc version are you using?