wecui/packages/wecui-css/node_modules/tcomb/lib/create.js

一款基于Vue2.x版本的移动端web组件

var isType = require('./isType');
var isStruct = require('./isStruct');
var getFunctionName = require('./getFunctionName');
var assert = require('./assert');
var stringify = require('./stringify');

// creates an instance of a type, handling the optional new operator
module.exports = function create(type, value, path) {
  if (isType(type)) {
    // for structs the new operator is allowed
    return isStruct(type) ? new type(value, path) : type(value, path);
  }

  if (process.env.NODE_ENV !== 'production') {
    // here type should be a class constructor and value some instance, just check membership and return the value
    path = path || [getFunctionName(type)];
    assert(value instanceof type, function () { return 'Invalid value ' + stringify(value) + ' supplied to ' + path.join('/'); });
  }

  return value;
};