Fix type errors in suggest.ts

Author: mjbvz

src/vs/editor/contrib/suggest/browser/suggest.ts

@@ -178,13 +178,13 @@ export class CompletionOptions {
 	) { }
 }
 
-let _snippetSuggestSupport: languages.CompletionItemProvider;
+let _snippetSuggestSupport: languages.CompletionItemProvider | undefined;
 
-export function getSnippetSuggestSupport(): languages.CompletionItemProvider {
+export function getSnippetSuggestSupport(): languages.CompletionItemProvider | undefined {
 	return _snippetSuggestSupport;
 }
 
-export function setSnippetSuggestSupport(support: languages.CompletionItemProvider): languages.CompletionItemProvider {
+export function setSnippetSuggestSupport(support: languages.CompletionItemProvider | undefined): languages.CompletionItemProvider | undefined {
 	const old = _snippetSuggestSupport;
 	_snippetSuggestSupport = support;
 	return old;

src/vs/editor/contrib/suggest/browser/suggestModel.ts

@@ -230,7 +230,10 @@ export class SuggestModel implements IDisposable {
 				let set = supportsByTriggerCharacter.get(ch);
 				if (!set) {
 					set = new Set();
-					set.add(getSnippetSuggestSupport());
+					const suggestSupport = getSnippetSuggestSupport();
+					if (suggestSupport) {
+						set.add(suggestSupport);
+					}
 					supportsByTriggerCharacter.set(ch, set);
 				}
 				set.add(support);