Firacode: <= and =< look the same. Hard to find syntax error

[scottgrayson]

I just wrote a syntax error in javascript accidentally using =< for comparison. I couldn't tell it was wrong until i copy pasted into a chat room, because fira code produces the same symbol with both <= and =<

Is there a use for this? Can =< be made to look different or be ignored?

[tonsky]

One of them should be made optional, yes

On Tue, Jan 31, 2017 at 12:18 AM Scott Grayson [e-mail]
wrote:

I just wrote a syntax error in javascript accidentally using =< for
comparison. I couldn't tell it was wrong until i copy pasted into a chat
room, because fira code produces the same symbol with both <= and =<

Is there a use for this? Can =< be made to look different or be ignored?

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[thasmo]

Can't =< be a bit like /='s ligature?

[j-f1]

In addition, many help pages say x=<the value of x>, which is ligatured to x⩽the value of x>.

[willpower232]

this is particularly an issue if the symbol is part of a string in something like PHP. the ligature will be present in both combinations but an error is not detectable until runtime.

[danielyli]

What's the status of this request?

[tonsky]

pending

[danielyli]

The syntax key=\neither of which is popular — Erlang is #30 and Prolog doesn't even show up.

In light of this, I'm curious why this still justifies the =< ligature when @tonsky has used the same argument to overrule inclusion of /\ and \/ ligatures (a good decision, I would add):

\/ and /\ are hard to squeese in because they would conflict with escape sequences a lot

https://github.com/tonsky/FiraCode/issues/333#issuecomment-267568194

Is it simply because it was an early decision? https://github.com/tonsky/FiraCode/commit/4af8a24ede7de7020d671f794eb5cd30c94e42da