Partial loss of Syntax highlighting when updating to Visual Studio 2017 RC

[JohnWeisz]

TypeScript Version: 2.1.5

Code

import * as React from "react";
export var t = new Date();

Expected behavior:

Keywords import, as, from, export, var and new should be highlighted (by default, blue).

Actual behavior:

Only var is highlighted, as shown on this screenshot:

Additional notes

• TypeScript build succeeds
• All project types are affected
• VS 2017 RC was installed next to a VS 2015 installation
• Both VS 2015 and 2017 are Community edition
• The new installation of VS 2017 did not affect the earlier VS 2015 one
• JSX/TSX syntax highlighting is gone too

[JohnWeisz]

Something is clearly wrong:

I believe the word IContentLoader should be of the same color as WebContentLoader. Strangely, the export keyword is highlighted here.

[mhegazy]

is this only for a single project? are all files showing the same behavior? if so where is the second screenshot from? what happens if you open a new .ts file in a new session of VS?

[JohnWeisz]

Multiple projects, thousands of files, all display the exact same behavior. I restarted VS multiple times (also, as I said, in VS2015 the syntax highlighting works flawlessly), and, among other things, tried:

• Running VS 2017 RC as admin
• Disabling/enabling TextMate extension (disabling it completely eliminated all syntax highlighting, except for class names)
• Installing TS 2.2 (although it had no effect regarding the displayed version in the About window of VS)
• Running devenv /setup

This is how it looks in a larger scope:

As you can see, it's "mostly" intact, but it seems as if the keyword recognition was leaking between tokens. Also, I believe that's not how methods are supposed to look.

[JohnWeisz]

Interestingly enough, the same happens with plain .js files (which I believe are now using the Typescript language service for autocompletion as well). For example, the new keyword is not colored.

[JohnWeisz]

Alright. Visual Studio 2017 RC is recognizing new, import, export, from, as keywords as Operator, and changing the color of operators in the Fonts & Colors settings will once again highlight these, while also highlighting regular operators and brackets around function parameters (?).

I believe something's not quite right in the TS language service. This is how it looks when applying a custom styling to Operator (picked a strong red one for it to be clearly visible):

The readonly keyword is still not highlighted.

Note: everything else is default, this is a fresh installation.

[Tragetaschen]

I have the very same problem.

I started with VS2015 Professional this morning (TS 2.2) and installed VS2017 Professional RTM (TS 2.1) and the syntax highlighting is broken in exactly the same way as @JohnWeisz describes.

[Tragetaschen]

For example, I clone https://github.com/tragetaschen/angular-issue-n14513 and choose from the context menu of the src folder to "Open in Visual Studio". I then open main.ts and get this:

[louis-gale]

Looks like someone fundamentally broke the Typescript IClassifier! Below is an example where the public keyword changes its colouring depending on on the code:

Notice how the second public keyword is not coloured blue. If i remove the contents of the first array, then the second public keyword becomes correctly coloured:

This would also explain why the keywords are being incorrectly classified as Operators in the example that @JohnWeisz posted.

[billti]

Hmmmm.... trying the snippet from @Xcalllibur and the repro from @Tragetaschen , I don't see any problems. Screen clippings below. I even messed around with the default theme to see if this might have an impact, but all looked good.

That said, there's definitely something up here. This has been reported in #14523 also. Can you take a look at the questions I just posted there and see if anything here might apply to your environments?

Thanks, and sorry for the inconvenience.

[jramsay]

@Xcalllibur, @JohnWeisz : Thanks for helping us with this issue! TypeScript & JavaScript now use TextMate language files to inform classification. Some additional things to try that might help isolate the problem here:

1. Can you confirm that other TSLS features are working correctly on your installation? (formatting, completions, etc).

2. There is a known issue with TextMate support in VS where sometimes there are missing colors. To make sure this isn’t the case here can you try running the following from a VS Developer cmd prompt to see if it resolves the issue:
   • devenv.exe /updateconfiguration
   • devenv.exe /setup

3. What is your VS installation directory?
   Ex: C:\Program Files[ (x86)]\Microsoft Visual Studio 15.0\Common7\IDE

4. Does the tmLanguage folder exist under the TypeScript installation path?
   Ex: C:\Program Files\Microsoft Visual Studio 15.0\Common\IDE\CommonExtensions\Microsoft\TypeScript\tmLanguage

5. Do you have any custom grammar files (.tmLanguage, .tmTheme) located in your user profile?
   Ex: %userprofile%.vs\Extensions

6. Can you verify this isn’t a TM language caching issue:

• Close VS
• Go to the TexMateCache location:
• %localappdata%\Microsoft\VisualStudio[15.0XXXXX]\TextMateCache
• Delete all the .cache files in this directory
• Reopen VS and try to repro
  Does this resolve the issue?

7. Do you have the TypeScript TextMate registry key set correctly?
   ◦Close VS
   ◦Open regedit
   ◦Select HKLM
   ◦File > Load Hive …
   ◦Open %localappdata%\Microsoft\VisualStudio\15.0_xxx\privateregistry.bin (you can name the hive VS)
   ◦Now navigate to:
   Computer\HKEY_LOCAL_MACHINE\VS\Software\Microsoft\VisualStudio\15[XXXXX]_Config\TextMate\Repositories

Does the TypeScript reg key exist? The directory should match the tmLanguage folder path from question 2 – is it the same?

Note: you'll need to unload the hive (File > Unload Hive) before you can open VS again.

[louis-gale]

@billti @jramsay I can confirm that the fix provided by Peter-Juhasz in the thread you linked solved my issue, namely:

Overwrite files in "%userprofile%.vs\Extensions\typescript\syntaxes" with the ones from Visual Studio's "CommonExtensions\Microsoft\TypeScript\tmLanguage".

I then had to close all my files and reopen them to get the syntax highlighting to work (that is after restarting Visual Studio). Interestingly, before updating these files I tried deleting what was in my %userprofile% typescript folder and the syntax highlighting was still broken.

I think it is relevant to mention that i also had Visual Studio 2015 installed on this machine with the latest Web Essentials extension installed.

@jramsay I ran through your questions (1- 7) before trying this fix and none of them helped unfortunately. I don't have time to post detailed answers but i can confirm there was nothing out of the ordinary with my registry settings, etc.

[Tragetaschen]

@jramsay

1. Yes, formatting, completions, etc. work correctly
2. No, after running those two commands (the second one needs elevation), the issue still persists
3. C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\Common7\IDE
4. Yes, this folder exists (Common7, though)
5. (see 6)
6. Yes, there's a whole list. I tried uninstalling @madskristensen Syntax Highlighting Pack extension, but the entire folder remained available (uninstall issue?). When I manually removed its typescript folder, syntax highlighting was entirely gone. I then deleted %localappdata%'s TextMateCache folder and syntax highlighting went back to normal.
7. Didn't do that