[D] Grammar and ligature support has some oddities

[TheGag96]

(Repost from the Sublime forum)

I found out the other day that Sublime finally got ligature support, which is great. A lot of stuff from Fira Code works beautifully, but there are still some nitpicks I have that apparently stem from the way language grammars affect ligatures.

Some stuff I'm noticing:

• the .. operator often makes Sublime think a float literal is on the right hand side if a numeral is there
• the => operator for lambdas doesn't get made into the pretty Fira Code arrow
• Stuff like 0x10 doesn't get the smaller x character (though this is the case for every other language too, as well as +-*:; ThomSmith pointed out this is due to lack of support for contextual alternatives)
• /// is grouped as a double slash and one single further apart instead of the triple slash (this happens in C as well)
• /= doesn't get combined like in C
• ||= doesn't get recognized in D nor C (yet |= works just fine in both)
• ~= doesn't get made into the tilde with a line under it (don't know whether it should be that way or not; this would be for concatenation)

As a side note, after an improvement update to the D grammar about two years back, class code became highlighted entirely with the "class" color. I've been dealing with this until now by setting that color to match regular text.

Anyways, hope to see these improvements. Thanks to the wonderful Sublime team!

[wbond]

All of the ligature issues are almost certainly related to the (current) poor quality of the D grammar. What we really need is someone who knows a lot about D and who is willing to learn some about Sublime syntaxes so that we can mentor and provide feedback on improvements or a rewrite of the syntax.

If you are interested in helping out, the following would be some good reading:

• http://www.sublimetext.com/docs/3/syntax.html (be sure to read the section at the end about testing)
• http://www.sublimetext.com/docs/3/scope_naming.html

The C# syntax may be a good reference since @keith-hall has done a ton of work on that, and is one of the most active contributors from the community to this repo.

[BenjaminSchaaf]

This should have been fixed by #1850 (Other than ||= as that isn't a operator in D afaik)

[wbond]

This issue has been solved by a previous commit, hence it is being closed.