Compatibility with column-enforce-mode and long literate (latex-style) comments

[listx]

column-enforce-mode (https://github.com/jordonbiondo/column-enforce-mode) is a minor mode that highlights long lines (starting with the 80th column).

As of today, column-enforce-mode has a new feature variable called column-enforce-comments that disables highlighting long lines if they are comment lines. From what I can tell, haskell-mode has a caching mechanism for applying font-lock-comment-face (in haskell-fl-latex-comments) and column-enforce-comments does not work reliably with it (sometimes it highlights long comment lines, sometimes it doesn't --- all within the same file).

Is there a way to fix this?

[gracjan]

@listx: I know this is an old issue, but could you create a test case in tests/haskell-font-lock-tests.el? Thanks.

[listx]

Between work and my other projects I do not have the time to learn how the test suite works, and to add a test case for it. Sorry!

FWIW the issue is still relevant.

[gracjan]

Note that we have changed significantly how comments are marked in Latex sources. It used to use start and and of comment, right now it is per line. Can you check if the issue really persist after #1050 got merged?

[listx]

So, my last comment stating that the issue still persists was in error. Since the time of the original report, I had moved to MMM (Multiple Major Modes) and had enabled LaTeX mode for the latex-style comment regions. For some reason I had equated the long-line highlighting within the LaTeX mode (not literate-haskell-mode) parts with this bug report.

Simply enabling literate-haskell-mode only reveals that indeed this issue has been fixed (probably after #1050 got merged as you suggested). The long lines in the latex-style comment blocks do not get highlighted by column-enforce-mode for me.

Thanks @gracjan for the tip