No syntax highlighting and "Test ANTLR Rule" disabled on PyCharm 2021.3.1 (Professional Edition)

[eirikur-grid]

Hi there. I'm, running into a weird issue using the ANTLR plug-in in PyCharm 2021.3.1 on macOS (Big Sur).
I can configure it for my grammar, select the target language (Python3) and run the "Generate ANTLR Recognizer" action without any problems. However, there's no syntax highlighting and I can't use the "Test ANTLR Rule" action.

I've tried uninstalling the plugin and then re-installing it but that didn't help. However, if I open the same project/directory in either

• PyCharm 2020.3 (Community Edition)
• IntelliJ 2021.3.1 (Community Edition)

it works like a charm! (no pun intended)

[bjansen]

@eirikur-grid could you attach your idea.log please (Help > Show Logs)? It looks like something goes wrong during IDE startup.

[eirikur-grid]

Sure, here it is
idea.log

[MalekiRe]

I have the same issue on Linux, but for Intellij 2021 Ultimate

[heyqbnk]

Same for me. Works in PyCharm 2021.3.2 (Community Edition), but does not in WebStorm 2021.3.3 (Professional Edition)

[flowrider3000]

Same issue here on IntelliJ IDEA 2021.3.3 (Ultimate Edition) and MacOS

[adhamsalama]

Same issue with IntelliJ IDEA 2021.3.3 (Community Edition) on Linux.
Edit: This was solved by creating a new scratch file and choosing ANTLR as the type.

[parrt]

Hi. Could try the zip here #495 (comment) ? We'll push a new version soon.

[parrt]

Hmm...just tried on Linux inside google and it worked with 1.17 and 1.18. BUT, another googler with same linux box and intellij it did not work for either!!!

[bjansen]

Is the g4 extension correctly registered as ANTLR grammar in Preferences | Editor | File and Code Templates?

[eirikur-grid]

Is the g4 extension correctly registered as ANTLR grammar in Preferences | Editor | File and Code Templates?

I presume you meant File Types, rather than File and Code Templates.

The File Types list is interesting. In the problematic version (PyCharm 2021.3.1 Professional) then I can see an entry for "ANTLR v4 grammar file" but the "File name patterns" list is empty! Rather surprisingly, *.g4 is listed under the "Text" file type.

In my PyCharm 2020.3 Community installation, I see *.g4 correctly listed for "ANTLR v4 grammar file"

[eirikur-grid]

For me, the issue is solved by removing *.g4 from the "Text" file type and adding it to the "ANTLR v4 grammar file" type

[parrt]

It's very strange that the tool did not recognize the grammar file as a grammar .g4 file type. I should've noticed that it was not set text highlighted right away. I wonder why you had to manually do this. any ideas @bjansen ?

[parrt]

Ok, I just found a place related to file type mapping they used a deprecated API; working on updating that.