Fix crash when constructor parameter has no type. Closes #38

.gitignore

@@ -10,8 +10,8 @@ npm-debug.log*
 dist
 
 # Extracted strings
-template.json
-template.pot
+strings.json
+strings.pot
 
 # Dependency directory
 node_modules

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@biesbjerg/ngx-translate-extract",
-  "version": "2.2.3",
+  "version": "2.2.4",
   "description": "Extract strings from projects using ngx-translate",
   "main": "dist/index.js",
   "typings": "dist/index.d.ts",

src/parsers/service.parser.ts

@@ -49,6 +49,11 @@ export class ServiceParser extends AbstractAstParser implements ParserInterface
 				return false;
 			}
 
+			// Parameter has no type
+			if (!parameter.type) {
+				return false;
+			}
+
 			// Make sure className is of the correct type
 			const parameterType: ts.Identifier = (parameter.type as ts.TypeReferenceNode).typeName as ts.Identifier;
 			if (!parameterType) {

tests/parsers/service.parser.spec.ts

@@ -151,4 +151,17 @@ describe('ServiceParser', () => {
 		expect(keys).to.deep.equal(['You are expected at {{time}}']);
 	});
 
+	it('should not crash when constructor parameter has no type', () => {
+		const contents = `
+			@Component({ })
+			export class AppComponent {
+				public constructor(protected _translateService) { }
+				public test() {
+					this._translateService.instant('Hello World');
+				}
+		`;
+		const keys = parser.extract(contents, componentFilename).keys();
+		expect(keys).to.deep.equal([]);
+	});
+
 });