[RFC] Node.prototype.process

[aleclarson]

The process method would apply a new set of plugins to the node and its descendants.

This may require changes to magic-string to work properly. We'll want a "slice" of the MagicString object that applies changes based on a character offset (where our node starts). The original MagicString object would inherit any changes we make to the "slice".

// A plugin that applies its own plugins.
const plugin = {
  ClassBody(node) {
    node.process(plugins, state)
  }
}

The plugins argument must be an array with at least one element.

The state argument is an optional object, which defaults to the "parent" state.

This is very efficient when you want a subset of plugins to be used only if within a certain context.

[aleclarson]

This has been added in 4015b39 (not available on NPM yet).

node.process(state, plugins)
// or
node.process(plugins)

I've decided the state argument won't default to the "parent" state (that is, the state of either nebu.process or another node.process call that we're nested in). It's easy enough to pass in the parent state manually, since it's already exposed to every visitor.

[aleclarson]

Now available in v1.1.0