Return type is lost in transform-classes

[arv]

Input Code

// @flow
class C {
  m(x: number): string {
    return 'a';
  }
}

Output Code

...
// @flow

var C = function () {
  function C() {
    (0, _classCallCheck3.default)(this, C);
  }

  (0, _createClass3.default)(C, [{
    key: 'm',
    value: function m(x: number) {  // <---
      return 'a';
    }
  }]);
  return C;
}();

Expected Behavior

I expect the return type to be kept on the function expression.

Current Behavior

Type annotation is removed.

software	version
Babel	6.14.0 (babel-core 6.14.0)
node	v6.6.0
npm	3.9.2
Operating System	OS X

[hzoo]

Hmm we need to check if its just not printing it out (babel-generator) or the transform is dropping it for some reason (transform-class)

Also whats the reason for not striping the flow types in the same config?

[arv]

I found it when trying out transform-flow-comments so I'm pretty sure it is not just the printer.

[hzoo]

Oh this is with flow-comments only? There are some issues with it because of the transforms - there was an old issue https://github.com/babel-plugins/babel-plugin-flow-comments/issues/17 and pr (https://github.com/babel-plugins/babel-plugin-flow-comments/pull/18) about this.

What about https://babeljs.io/docs/plugins/transform-flow-strip-types/?

[hzoo]

awesome @danharper made a fix #4668. so fast

[arv]

@hzoo No, this is not related to transform-flow-comments.

transform-flow-strip-types removes the types so that is not related. I want to keep the types.