Support @jsx pragma

[brandonhorst]

In addition to supporting React, babel supports generic JSX transforms, using a pragma like this:

/** @jsx mypackage.doSomething */

demo

Would it be possible to respect this pragma. It's not a Babel invention, to my knowledge React itself required it until recently. In the case in the demo, observing the pragma would mean not only ignoring the fact that React is not defined (react-in-jsx-scope), but also ensuring that mypackage.doSomething is defined.

I am currently working on a project using jsx in a non-React context, and I imagine I am not the only one.

[yannickcr]

You're right, we should definitely support this pragma.

[moll]

Was this pragma support supposed to add it to the no-unused-vars lookup too? I'm seeing the unused variable warning while having a pragma passes the react-in-jsx-scope rule.

[moll]

To answer myself: seems to. I was merely using an older version and hadn't noticed to upgrade.