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Текущая директория: /usr/lib/node_modules/bitgo/node_modules/tcomb/lib

Просмотр файла: declare.js

var assert = require('./assert');
var isTypeName = require('./isTypeName');
var isType = require('./isType');
var isNil = require('./isNil');
var mixin = require('./mixin');
var getTypeName = require('./getTypeName');
var isUnion = require('./isUnion');

// All the .declare-d types should be clearly different from each other thus they should have
// different names when a name was not explicitly provided.
var nextDeclareUniqueId = 1;

module.exports = function declare(name) {
  if (process.env.NODE_ENV !== 'production') {
    assert(isTypeName(name), function () { return 'Invalid argument name ' + name + ' supplied to declare([name]) (expected a string)'; });
  }

  var type;

  function Declare(value, path) {
    if (process.env.NODE_ENV !== 'production') {
      assert(!isNil(type), function () { return 'Type declared but not defined, don\'t forget to call .define on every declared type'; });
      if (isUnion(type)) {
        assert(type.dispatch === Declare.dispatch, function () { return 'Please define the custom ' + name + '.dispatch function before calling ' + name + '.define()'; });
      }
    }
    return type(value, path);
  }

  Declare.define = function (spec) {
    if (process.env.NODE_ENV !== 'production') {
      assert(isType(spec), function () { return 'Invalid argument type ' + assert.stringify(spec) +  ' supplied to define(type) (expected a type)'; });
      assert(isNil(type), function () { return 'Declare.define(type) can only be invoked once'; });
      // assert(isNil(spec.meta.name) && Object.keys(spec.prototype).length === 0, function () { return 'Invalid argument type ' + assert.stringify(spec) + ' supplied to define(type) (expected a fresh, unnamed type)'; });
    }

    if (isUnion(spec) && Declare.hasOwnProperty('dispatch')) {
      spec.dispatch = Declare.dispatch;
    }
    type = spec;
    mixin(Declare, type, true); // true because it overwrites Declare.displayName
    if (name) {
      type.displayName = Declare.displayName = name;
      Declare.meta.name = name;
    }
    Declare.meta.identity = type.meta.identity;
    Declare.prototype = type.prototype;
    return Declare;
  };

  Declare.displayName = name || ( getTypeName(Declare) + "$" + nextDeclareUniqueId++ );
  // in general I can't say if this type will be an identity, for safety setting to false
  Declare.meta = { identity: false };
  Declare.prototype = null;
  return Declare;
};

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