Autocomplete from keyword in export declarations (microsoft#56029)

Author: Andarist

src/services/completions.ts

@@ -5654,6 +5654,11 @@ function getImportStatementCompletionInfo(contextToken: Node, sourceFile: Source
             }
             return undefined;
         }
+        if (isExportDeclaration(parent) && contextToken.kind === SyntaxKind.AsteriskToken || isNamedExports(parent) && contextToken.kind === SyntaxKind.CloseBraceToken) {
+            isKeywordOnlyCompletion = true;
+            keywordCompletion = SyntaxKind.FromKeyword;
+            return undefined;
+        }
         if (isImportKeyword(contextToken) && isSourceFile(parent)) {
             // A lone import keyword with nothing following it does not parse as a statement at all
             keywordCompletion = SyntaxKind.TypeKeyword;

tests/cases/fourslash/completionExportFrom.ts

@@ -0,0 +1,12 @@
+/// <reference path="fourslash.ts" />
+
+//// export * /*1*/;
+//// export {} /*2*/;
+
+verify.completions({
+    marker: ["1", "2"],
+    includes: [{
+        name: "from",
+        sortText: completion.SortText.GlobalsOrKeywords,
+    }],
+});