vscode: use void where possible

editors/code/src/commands/syntax_tree.ts

@@ -55,7 +55,7 @@ export function syntaxTree(ctx: Ctx): Cmd {
 
 // We need to order this after LS updates, but there's no API for that.
 // Hence, good old setTimeout.
-function afterLs(f: () => unknown) {
+function afterLs(f: () => void) {
     setTimeout(f, 10);
 }
 

editors/code/src/ctx.ts

@@ -1,5 +1,6 @@
 import * as vscode from 'vscode';
 import * as lc from 'vscode-languageclient';
+
 import { Config } from './config';
 import { createClient } from './client';
 
@@ -73,11 +74,11 @@ export class Ctx {
         }
     }
 
-    get subscriptions(): { dispose(): unknown }[] {
+    get subscriptions(): Disposable[] {
         return this.extCtx.subscriptions;
     }
 
-    pushCleanup(d: { dispose(): unknown }) {
+    pushCleanup(d: Disposable) {
         this.extCtx.subscriptions.push(d);
     }
 
@@ -86,6 +87,9 @@ export class Ctx {
     }
 }
 
+export interface Disposable {
+    dispose(): void;
+}
 export type Cmd = (...args: any[]) => unknown;
 
 export async function sendRequestWithRetry<R>(

editors/code/src/status_display.ts

@@ -1,6 +1,6 @@
 import * as vscode from 'vscode';
 
-import { WorkDoneProgress, WorkDoneProgressBegin, WorkDoneProgressReport, WorkDoneProgressEnd } from 'vscode-languageclient';
+import { WorkDoneProgress, WorkDoneProgressBegin, WorkDoneProgressReport, WorkDoneProgressEnd, Disposable } from 'vscode-languageclient';
 
 import { Ctx } from './ctx';
 
@@ -14,7 +14,7 @@ export function activateStatusDisplay(ctx: Ctx) {
     });
 }
 
-class StatusDisplay implements vscode.Disposable {
+class StatusDisplay implements vscode.Disposable, Disposable {
     packageName?: string;
 
     private i: number = 0;