fix: parse errors with JS comments at end of expressions

src/strategies/typescript.ts

@@ -61,11 +61,15 @@ export default <TypescriptStrategy>{
     };
   },
   getMiddleTailTemplatePart(node: ts.TemplateMiddle | ts.TemplateTail) {
-    const fullText = node.getFullText(currentRoot);
+    // Use text, not fullText, to avoid prefix comments, which are part of the
+    // expression.
+    const text = node.getText(currentRoot);
     const endOffset = ts.isTemplateMiddle(node) ? 2 : 1;
     return {
-      text: fullText.slice(1, fullText.length - endOffset),
-      start: node.pos + 1,
+      text: text.slice(1, text.length - endOffset),
+      // Use getStart() and not node.pos, which may include prefix comments,
+      // which are part of the expression
+      start: node.getStart(currentRoot) + 1,
       end: node.end - endOffset
     };
   }

test/parse-tests.ts

@@ -264,4 +264,29 @@ export default function createParseTests(options: ParseTestsOptions = {}) {
       }
     ]);
   });
+
+  it('should parse literals with comments in template tail', () => {
+    expect(
+      parseLiterals(
+        options.codePrefix +
+          '`head${true/* tail comment */}tail`' +
+          options.codeSuffix
+      )
+    ).to.deep.equal([
+      {
+        parts: [
+          {
+            text: 'head',
+            start: 1 + offset,
+            end: 5 + offset
+          },
+          {
+            text: 'tail',
+            start: 30 + offset,
+            end: 34 + offset
+          }
+        ]
+      }
+    ]);
+  });
 }