Syntax highlighting does not work for me

[slavizh]

I have installed the bicep VSC extension but I do not see any highlighting.
What information you need to troubleshoot?

[alex-frankel]

Can you add OS information as well as your VS code version (code --version)?

[slavizh]

Sent info via e-mail

[georgechang]

I'm seeing the same issue on my end. VS Code 1.48.2 x64 on Win10.

[mattias-pedersen]

I had the same problem for the syntax problem. I changed back to "Dark+ (Default dark)" theme and now it works for me. Does not work with any custom or marketplace themes for me.

[majastrz]

@blobbylight that's super helpful actually. Are these themes you made or one from the vs code marketplace? If it's the latter, can you give us their names so we can try to repro the issue?

[mattias-pedersen]

@majastrz I used slime from the marketplace and that one did not work.
Below is the themes i found not working and some not working to 100%

Slime (marketplace) - not working
Atom one dark - not working
Powershell ISE - not working

Light (visual studio) - not working to 100% some parameters are not highlighted
Dark (visual studio) - not working to 100% some parameters are not highlighted

[slavizh]

I am with. It is marketplace theme.

[georgechang]

Nice catch @blobbylight! I'm using this theme from the marketplace that doesn't work:
https://marketplace.visualstudio.com/items?itemName=mischah.relaxed-theme

Confirmed that it works in a bunch of standard VS Code themes but none of the custom ones.

[anthony-c-martin]

Thanks to @blobbylight for figuring this out!

I believe we need to configure the following for this to work:
https://code.visualstudio.com/api/language-extensions/semantic-highlight-guide#semantic-token-scope-map

[shenglol]

@slavizh @blobbylight Some custom themes don't enable semantic syntax highlighting. You can override that for a specific theme with the following VSCode settings for now until we implement scope map:

    "editor.semanticHighlighting.enabled": true,
    "editor.semanticTokenColorCustomizations": {
        "[Atom One Dark]": {
            "enabled": true
        }
    }

[alex-frankel]

Some this will be mitigated by completing #268. In the meantime, you can use @shenglol's fix.

We could potentially trigger something in the extension if we identify this and let user's turn it on.

[anthony-c-martin]

FYI, looks like this is being worked on for Atom One Dark here. I expect as more and more extensions take advantage of semantic colorization, it'll gain wider adoption across other themes.

[alex-frankel]

We think this will get better over time as more themes adopt semantic highlighting, and there is not much more we can do other than to auto-detect when this occurs. Closing for now.