diff --git a/src/services/preProcess.ts b/src/services/preProcess.ts
index 41845616bbe4b..d5c384e9161cc 100644
--- a/src/services/preProcess.ts
+++ b/src/services/preProcess.ts
@@ -345,6 +345,42 @@ namespace ts {
break;
}
+ if (scanner.getToken() === SyntaxKind.TemplateHead) {
+ const stack = [scanner.getToken()];
+ let token = scanner.scan();
+ loop: while (length(stack)) {
+ switch (token) {
+ case SyntaxKind.EndOfFileToken:
+ break loop;
+ case SyntaxKind.ImportKeyword:
+ tryConsumeImport();
+ break;
+ case SyntaxKind.TemplateHead:
+ stack.push(token);
+ break;
+ case SyntaxKind.OpenBraceToken:
+ if (length(stack)) {
+ stack.push(token);
+ }
+ break;
+ case SyntaxKind.CloseBraceToken:
+ if (length(stack)) {
+ if (lastOrUndefined(stack) === SyntaxKind.TemplateHead) {
+ if (scanner.reScanTemplateToken(/* isTaggedTemplate */ false) === SyntaxKind.TemplateTail) {
+ stack.pop();
+ }
+ }
+ else {
+ stack.pop();
+ }
+ }
+ break;
+ }
+ token = scanner.scan();
+ }
+ nextToken();
+ }
+
// check if at least one of alternative have moved scanner forward
if (tryConsumeDeclare() ||
tryConsumeImport() ||
diff --git a/src/testRunner/unittests/services/preProcessFile.ts b/src/testRunner/unittests/services/preProcessFile.ts
index fb7a7e62649d4..a6369d6e4d4cf 100644
--- a/src/testRunner/unittests/services/preProcessFile.ts
+++ b/src/testRunner/unittests/services/preProcessFile.ts
@@ -176,6 +176,177 @@ describe("unittests:: services:: PreProcessFile:", () => {
});
});
+ it("Correctly ignore commented imports following template expression", () => {
+ /* eslint-disable no-template-curly-in-string */
+ test("/**" + "\n" +
+ " * Before" + "\n" +
+ " * ```" + "\n" +
+ " * import * as a from \"a\";" + "\n" +
+ " * ```" + "\n" +
+ " */" + "\n" +
+ "type Foo = `${string}`;" + "\n" +
+ "/**" + "\n" +
+ " * After" + "\n" +
+ " * ```" + "\n" +
+ " * import { B } from \"b\";" + "\n" +
+ " * import * as c from \"c\";" + "\n" +
+ " * ```" + "\n" +
+ " */",
+ /*readImportFile*/ true,
+ /*detectJavaScriptImports*/ true,
+ {
+ referencedFiles: [],
+ typeReferenceDirectives: [],
+ libReferenceDirectives: [],
+ importedFiles: [],
+ ambientExternalModules: undefined,
+ isLibFile: false
+ });
+ /* eslint-enable no-template-curly-in-string */
+ });
+
+ it("Correctly returns imports after a template expression", () => {
+ /* eslint-disable no-template-curly-in-string */
+ test("`${foo}`; import \"./foo\";",
+ /*readImportFile*/ true,
+ /*detectJavaScriptImports*/ true,
+ {
+ referencedFiles: [],
+ typeReferenceDirectives: [],
+ libReferenceDirectives: [],
+ importedFiles: [
+ { fileName: "./foo", pos: 17, end: 22 }
+ ],
+ ambientExternalModules: undefined,
+ isLibFile: false
+ });
+ /* eslint-enable no-template-curly-in-string */
+ });
+
+ it("Correctly returns dynamic imports from template expression", () => {
+ /* eslint-disable no-template-curly-in-string */
+ test("`${(
Text `` ${} text {} " + "\n" +
+ "${import(\"a\")} {import(\"b\")} " + "\n" +
+ "${/* A comment */} ${/* import(\"ignored\") */}
)}`",
+ /*readImportFile*/ true,
+ /*detectJavaScriptImports*/ true,
+ {
+ referencedFiles: [],
+ typeReferenceDirectives: [],
+ libReferenceDirectives: [],
+ importedFiles: [
+ { fileName: "a", pos: 39, end: 40 },
+ { fileName: "b", pos: 53, end: 54 }
+ ],
+ ambientExternalModules: undefined,
+ isLibFile: false
+ });
+ /* eslint-enable no-template-curly-in-string */
+ });
+
+ it("Correctly returns dynamic imports from nested template expression", () => {
+ /* eslint-disable no-template-curly-in-string */
+ test("`${foo(`${bar(`${import(\"a\")} ${import(\"b\")}`, `${baz(`${import(\"c\") ${import(\"d\")}`)}`)}`)}`",
+ /*readImportFile*/ true,
+ /*detectJavaScriptImports*/ true,
+ {
+ referencedFiles: [],
+ typeReferenceDirectives: [],
+ libReferenceDirectives: [],
+ importedFiles: [
+ { fileName: "a", pos: 24, end: 25 },
+ { fileName: "b", pos: 39, end: 40 },
+ { fileName: "c", pos: 64, end: 65 },
+ { fileName: "d", pos: 78, end: 79 },
+ ],
+ ambientExternalModules: undefined,
+ isLibFile: false
+ });
+ /* eslint-enable no-template-curly-in-string */
+ });
+
+ it("Correctly returns dynamic imports from tagged template expression", () => {
+ /* eslint-disable no-template-curly-in-string */
+ test("foo`${ fn({ a: 100 }, import(\"a\"), `${import(\"b\")}`, import(\"c\"), `${import(\"d\")} foo`, import(\"e\")) }`",
+ /*readImportFile*/ true,
+ /*detectJavaScriptImports*/ true,
+ {
+ referencedFiles: [],
+ typeReferenceDirectives: [],
+ libReferenceDirectives: [],
+ importedFiles: [
+ { fileName: "a", pos: 29, end: 30 },
+ { fileName: "b", pos: 45, end: 46 },
+ { fileName: "c", pos: 60, end: 61 },
+ { fileName: "d", pos: 76, end: 77 },
+ { fileName: "e", pos: 95, end: 96 },
+ ],
+ ambientExternalModules: undefined,
+ isLibFile: false
+ });
+ /* eslint-enable no-template-curly-in-string */
+ });
+
+ it("Correctly returns dynamic imports from template expression and imports following it", () => {
+ /* eslint-disable no-template-curly-in-string */
+ test("const x = `hello ${await import(\"a\").default}`;" + "\n\n" +
+ "import { y } from \"b\";",
+ /*readImportFile*/ true,
+ /*detectJavaScriptImports*/ true,
+ {
+ referencedFiles: [],
+ typeReferenceDirectives: [],
+ libReferenceDirectives: [],
+ importedFiles: [
+ { fileName: "a", pos: 32, end: 33 },
+ { fileName: "b", pos: 67, end: 68 },
+ ],
+ ambientExternalModules: undefined,
+ isLibFile: false
+ });
+ /* eslint-enable no-template-curly-in-string */
+ });
+
+ it("Correctly returns dynamic imports from template expressions and other imports", () => {
+ /* eslint-disable no-template-curly-in-string */
+ test("const x = `x ${await import(\"a\").default}`;" + "\n\n" +
+ "import { y } from \"b\";" + "\n" +
+ "const y = `y ${import(\"c\")}`;" + "\n\n" +
+ "import { d } from \"d\";",
+ /*readImportFile*/ true,
+ /*detectJavaScriptImports*/ true,
+ {
+ referencedFiles: [],
+ typeReferenceDirectives: [],
+ libReferenceDirectives: [],
+ importedFiles: [
+ { fileName: "a", pos: 28, end: 29 },
+ { fileName: "b", pos: 63, end: 64 },
+ { fileName: "c", pos: 90, end: 91 },
+ { fileName: "d", pos: 117, end: 118 },
+ ],
+ ambientExternalModules: undefined,
+ isLibFile: false
+ });
+ /* eslint-enable no-template-curly-in-string */
+ });
+
+ it("Correctly returns empty importedFiles with incorrect template expression", () => {
+ /* eslint-disable no-template-curly-in-string */
+ test("const foo = `${",
+ /*readImportFile*/ true,
+ /*detectJavaScriptImports*/ true,
+ {
+ referencedFiles: [],
+ typeReferenceDirectives: [],
+ libReferenceDirectives: [],
+ importedFiles: [],
+ ambientExternalModules: undefined,
+ isLibFile: false
+ });
+ /* eslint-enable no-template-curly-in-string */
+ });
+
it("Correctly return ES6 exports", () => {
test("export * from \"m1\";" + "\n" +
"export {a} from \"m2\";" + "\n" +