Parsing error when using union types

[ibufu]

What version of TypeScript are you using?
v2.5.3

What version of typescript-eslint-parser are you using?
latest

What code were you trying to parse?

data() {
    return {
      form: {
        startDate: <Date | undefined> undefined
      }
    };
}

What did you expect to happen?

What happened?

parsing error.

[JamesHenry]

@ibufu do you have jsx: true in your parserOptions? That is the only way I can reproduce this.

Please see #399 for more information about this. Essentially when jsx: true, you cannot use ambiguous TS constructs such as the <> syntax for type assertions. You could refactor your code to use the as syntax instead.

I will close this out for now, but please let me know if my assumption about you using jsx is not accurate.