react-docgen/dist/utils/getTypeAnnotation.js

A CLI and toolkit to extract information from React components for documentation generation.

"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = getTypeAnnotation;

var _recast = _interopRequireDefault(require("recast"));

/*
 * Copyright (c) 2015, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 *
 * 
 *
 */
const types = _recast.default.types.namedTypes;

function hasTypeAnnotation(path) {
  return !!path.node.typeAnnotation;
}
/**
 * Gets the most inner valuable TypeAnnotation from path. If no TypeAnnotation
 * can be found nothing is returned
 */


function getTypeAnnotation(path) {
  if (!hasTypeAnnotation(path)) return null;
  let resultPath = path;

  do {
    resultPath = resultPath.get('typeAnnotation');
  } while (hasTypeAnnotation(resultPath) && !types.FlowType.check(resultPath.node));

  return resultPath;
}