Language-specific OpenType Feature Names for Programming Ligatures

[be5invis]

Given the fact that in different languages, the symbol combination should be combined into a ligature are different, is it possible to provide a language-specific feature name to distinct them? For example, in C++, >>= should not be combined together, and we can assign a feature XCPP to combine >> only. In Haskell, >>= should be combined, and feature XHS_ will be applied. The default calt can be restricted to "most-common" languages only.
cf. tonsky/FiraCode#192, atom/atom#11846, microsoft/vscode#6918, source-foundry/Hack#211, #155

[larsenwork]

@be5invis cool idea, I'm not sure editor support is there yet but please enlighten me if they are

[be5invis]

@larsenwork I've experimented a CSS patch to VSCode and it works well:

The style delta is

token.haskell{ font-feature-settings: "XHS_" 1 }