Add Circom language support

[cryptopapi997]

Added the Circom language

Checklist:

• I am adding a new language.

  • The extension of the new language is used in hundreds of repositories on GitHub.com.

    • Search results for each extension: >17k uses

  • I have included a real-world usage sample for all extensions added in this PR:

    • xor3, gpl3
    • binsum, gpl3
    • switcher, gpl3

  • I have included a syntax highlighting grammar: Only available grammar I could find was this one by the developers of circom, but it is currently unlicensed.

  • I have updated the heuristics to distinguish my language from others using the same extension.

[cryptopapi997]

Update: Thanks to @krlosMata 's super fast response , the syntax repo now has a license. It is GPL3, however. Let me know if this works @linguist and I'll happily add the syntax to my PR

[Alhadis]

It is GPL3, however

That's a deal-breaker. We only accept grammars released under permissive licenses, which rules out copyleft licenses like GPL completely.

[cryptopapi997]

Feared this unfortunately - can we still merge this PR without a grammar for now nonetheless?

[Alhadis]

Can we still merge this PR without a grammar for now nonetheless?

Yes. You can even reappropriate another language's grammar if it happens to provide decent-enough highlighting.

[krlosMata]

I will check other licenses that fits the requirements

[krlosMata]

It is GPL3, however

That's a deal-breaker. We only accept grammars released under permissive licenses, which rules out copyleft licenses like GPL completely.

I have change the license to MIT in https://github.com/iden3/circom-highlighting-vscode, so it fulfills the specification

[cryptopapi997]

Awesome! Currently out, but will add the grammar when I'm back 👍

[cryptopapi997]

Added the circom grammar, feel free to have a look again @Alhadis

[cryptopapi997]

Thanks for the review, added your changes @lildude

[lildude]

LGTM. Thanks.

Note: this PR will not be merged until close to when the next release is made. See here for more details.