Strange colourisation of template strings when "#/" present after first placeholder

[johnnyreilly]

I've noticed some odd behavior with the syntax colourisation for template strings in Visual Studio 2013 (using TypeScript 1.4 plugin). It occurs when the string "#/" is present within the template string after at least one placeholder is present. I realise reading that is as clear as mud so look at the screenshot below for clarification:

As you can see the first 2 examples colourise in the fashion you would hope. The 3rd example behaves in an unexpected fashion after the "#/". Here's the code you can use to reproduce it with:

class highlightingBug {

    demo() {

        var urlWithoutHash =
            `i_look_kind_of_normal_${"I_think"}`;

        var urlWithHash =
            `and_so_do_I_even_with_#/_in_place_${"I_think"}`;

        var urlWithHashAfterFirstPlaceHolder =
            `${"But_me_"}_well_things_look_a_little_odd_colour_wise_after_the_#/_${"That_is_what_I_think_anyway"}`;
    }
}

[DanielRosenwasser]

TypeScript 1.4 didn't have proper template string colorization support in VS2013, so I believe it thinks it's seeing the identifier _well_things_look_a_little_odd_colour_wise_after_the_, followed by invalid token #, and finally unterminated regex /_${"That_is_what_I_think_anyway"};`

If you're curious for a more technical explanation, you can check this page out on our wiki.

The short answer is, this has been fixed to a reasonable extent and will be available in TypeScript 1.5.

Marking this as a duplicate of #1477.

[johnnyreilly]

Ah great! Thanks for the detail.

[DanielRosenwasser]

No prob; while 1.5 proper should be out pretty soon, you can use the beta in the mean time.