vue-svg-loader/vue-cli/node_modules/prettier/third-party.js

Use SVG files as Vue Components

'use strict';

Object.defineProperty(exports, '__esModule', { value: true });

function _interopDefault (ex) { return (ex && (typeof ex === 'object') && 'default' in ex) ? ex['default'] : ex; }

var os = _interopDefault(require('os'));
var path = _interopDefault(require('path'));
var util = _interopDefault(require('util'));
var module$1 = _interopDefault(require('module'));
var fs = _interopDefault(require('fs'));
var stream = _interopDefault(require('stream'));

function _classCallCheck(instance, Constructor) {
  if (!(instance instanceof Constructor)) {
    throw new TypeError("Cannot call a class as a function");
  }
}

function _defineProperties(target, props) {
  for (var i = 0; i < props.length; i++) {
    var descriptor = props[i];
    descriptor.enumerable = descriptor.enumerable || false;
    descriptor.configurable = true;
    if ("value" in descriptor) descriptor.writable = true;
    Object.defineProperty(target, descriptor.key, descriptor);
  }
}

function _createClass(Constructor, protoProps, staticProps) {
  if (protoProps) _defineProperties(Constructor.prototype, protoProps);
  if (staticProps) _defineProperties(Constructor, staticProps);
  return Constructor;
}

function _inherits(subClass, superClass) {
  if (typeof superClass !== "function" && superClass !== null) {
    throw new TypeError("Super expression must either be null or a function");
  }

  subClass.prototype = Object.create(superClass && superClass.prototype, {
    constructor: {
      value: subClass,
      writable: true,
      configurable: true
    }
  });
  if (superClass) _setPrototypeOf(subClass, superClass);
}

function _getPrototypeOf(o) {
  _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) {
    return o.__proto__ || Object.getPrototypeOf(o);
  };
  return _getPrototypeOf(o);
}

function _setPrototypeOf(o, p) {
  _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) {
    o.__proto__ = p;
    return o;
  };

  return _setPrototypeOf(o, p);
}

function isNativeReflectConstruct() {
  if (typeof Reflect === "undefined" || !Reflect.construct) return false;
  if (Reflect.construct.sham) return false;
  if (typeof Proxy === "function") return true;

  try {
    Date.prototype.toString.call(Reflect.construct(Date, [], function () {}));
    return true;
  } catch (e) {
    return false;
  }
}

function _construct(Parent, args, Class) {
  if (isNativeReflectConstruct()) {
    _construct = Reflect.construct;
  } else {
    _construct = function _construct(Parent, args, Class) {
      var a = [null];
      a.push.apply(a, args);
      var Constructor = Function.bind.apply(Parent, a);
      var instance = new Constructor();
      if (Class) _setPrototypeOf(instance, Class.prototype);
      return instance;
    };
  }

  return _construct.apply(null, arguments);
}

function _isNativeFunction(fn) {
  return Function.toString.call(fn).indexOf("[native code]") !== -1;
}

function _wrapNativeSuper(Class) {
  var _cache = typeof Map === "function" ? new Map() : undefined;

  _wrapNativeSuper = function _wrapNativeSuper(Class) {
    if (Class === null || !_isNativeFunction(Class)) return Class;

    if (typeof Class !== "function") {
      throw new TypeError("Super expression must either be null or a function");
    }

    if (typeof _cache !== "undefined") {
      if (_cache.has(Class)) return _cache.get(Class);

      _cache.set(Class, Wrapper);
    }

    function Wrapper() {
      return _construct(Class, arguments, _getPrototypeOf(this).constructor);
    }

    Wrapper.prototype = Object.create(Class.prototype, {
      constructor: {
        value: Wrapper,
        enumerable: false,
        writable: true,
        configurable: true
      }
    });
    return _setPrototypeOf(Wrapper, Class);
  };

  return _wrapNativeSuper(Class);
}

function _assertThisInitialized(self) {
  if (self === void 0) {
    throw new ReferenceError("this hasn't been initialised - super() hasn't been called");
  }

  return self;
}

function _possibleConstructorReturn(self, call) {
  if (call && (typeof call === "object" || typeof call === "function")) {
    return call;
  }

  return _assertThisInitialized(self);
}

var isArrayish = function isArrayish(obj) {
  if (!obj) {
    return false;
  }

  return obj instanceof Array || Array.isArray(obj) || obj.length >= 0 && obj.splice instanceof Function;
};

var errorEx = function errorEx(name, properties) {
  if (!name || name.constructor !== String) {
    properties = name || {};
    name = Error.name;
  }

  var errorExError = function ErrorEXError(message) {
    if (!this) {
      return new ErrorEXError(message);
    }

    message = message instanceof Error ? message.message : message || this.message;
    Error.call(this, message);
    Error.captureStackTrace(this, errorExError);
    this.name = name;
    Object.defineProperty(this, 'message', {
      configurable: true,
      enumerable: false,
      get: function get() {
        var newMessage = message.split(/\r?\n/g);

        for (var key in properties) {
          if (!properties.hasOwnProperty(key)) {
            continue;
          }

          var modifier = properties[key];

          if ('message' in modifier) {
            newMessage = modifier.message(this[key], newMessage) || newMessage;

            if (!isArrayish(newMessage)) {
              newMessage = [newMessage];
            }
          }
        }

        return newMessage.join('\n');
      },
      set: function set(v) {
        message = v;
      }
    });
    var overwrittenStack = null;
    var stackDescriptor = Object.getOwnPropertyDescriptor(this, 'stack');
    var stackGetter = stackDescriptor.get;
    var stackValue = stackDescriptor.value;
    delete stackDescriptor.value;
    delete stackDescriptor.writable;

    stackDescriptor.set = function (newstack) {
      overwrittenStack = newstack;
    };

    stackDescriptor.get = function () {
      var stack = (overwrittenStack || (stackGetter ? stackGetter.call(this) : stackValue)).split(/\r?\n+/g); // starting in Node 7, the stack builder caches the message.
      // just replace it.

      if (!overwrittenStack) {
        stack[0] = this.name + ': ' + this.message;
      }

      var lineCount = 1;

      for (var key in properties) {
        if (!properties.hasOwnProperty(key)) {
          continue;
        }

        var modifier = properties[key];

        if ('line' in modifier) {
          var line = modifier.line(this[key]);

          if (line) {
            stack.splice(lineCount++, 0, '    ' + line);
          }
        }

        if ('stack' in modifier) {
          modifier.stack(this[key], stack);
        }
      }

      return stack.join('\n');
    };

    Object.defineProperty(this, 'stack', stackDescriptor);
  };

  if (Object.setPrototypeOf) {
    Object.setPrototypeOf(errorExError.prototype, Error.prototype);
    Object.setPrototypeOf(errorExError, Error);
  } else {
    util.inherits(errorExError, Error);
  }

  return errorExError;
};

errorEx.append = function (str, def) {
  return {
    message: function message(v, _message) {
      v = v || def;

      if (v) {
        _message[0] += ' ' + str.replace('%s', v.toString());
      }

      return _message;
    }
  };
};

errorEx.line = function (str, def) {
  return {
    line: function line(v) {
      v = v || def;

      if (v) {
        return str.replace('%s', v.toString());
      }

      return null;
    }
  };
};

var errorEx_1 = errorEx;

var jsonParseBetterErrors = parseJson;

function parseJson(txt, reviver, context) {
  context = context || 20;

  try {
    return JSON.parse(txt, reviver);
  } catch (e) {
    if (typeof txt !== 'string') {
      var isEmptyArray = Array.isArray(txt) && txt.length === 0;
      var errorMessage = 'Cannot parse ' + (isEmptyArray ? 'an empty array' : String(txt));
      throw new TypeError(errorMessage);
    }

    var syntaxErr = e.message.match(/^Unexpected token.*position\s+(\d+)/i);
    var errIdx = syntaxErr ? +syntaxErr[1] : e.message.match(/^Unexpected end of JSON.*/i) ? txt.length - 1 : null;

    if (errIdx != null) {
      var start = errIdx <= context ? 0 : errIdx - context;
      var end = errIdx + context >= txt.length ? txt.length : errIdx + context;
      e.message += ` while parsing near '${start === 0 ? '' : '...'}${txt.slice(start, end)}${end === txt.length ? '' : '...'}'`;
    } else {
      e.message += ` while parsing '${txt.slice(0, context * 2)}'`;
    }

    throw e;
  }
}

var JSONError = errorEx_1('JSONError', {
  fileName: errorEx_1.append('in %s')
});

var parseJson$1 = function parseJson(input, reviver, filename) {
  if (typeof reviver === 'string') {
    filename = reviver;
    reviver = null;
  }

  try {
    try {
      return JSON.parse(input, reviver);
    } catch (err) {
      jsonParseBetterErrors(input, reviver);
      throw err;
    }
  } catch (err) {
    err.message = err.message.replace(/\n/g, '');
    var jsonErr = new JSONError(err);

    if (filename) {
      jsonErr.fileName = filename;
    }

    throw jsonErr;
  }
};

function isNothing(subject) {
  return typeof subject === 'undefined' || subject === null;
}

function isObject(subject) {
  return typeof subject === 'object' && subject !== null;
}

function toArray(sequence) {
  if (Array.isArray(sequence)) return sequence;else if (isNothing(sequence)) return [];
  return [sequence];
}

function extend(target, source) {
  var index, length, key, sourceKeys;

  if (source) {
    sourceKeys = Object.keys(source);

    for (index = 0, length = sourceKeys.length; index < length; index += 1) {
      key = sourceKeys[index];
      target[key] = source[key];
    }
  }

  return target;
}

function repeat(string, count) {
  var result = '',
      cycle;

  for (cycle = 0; cycle < count; cycle += 1) {
    result += string;
  }

  return result;
}

function isNegativeZero(number) {
  return number === 0 && Number.NEGATIVE_INFINITY === 1 / number;
}

var isNothing_1 = isNothing;
var isObject_1 = isObject;
var toArray_1 = toArray;
var repeat_1 = repeat;
var isNegativeZero_1 = isNegativeZero;
var extend_1 = extend;
var common = {
  isNothing: isNothing_1,
  isObject: isObject_1,
  toArray: toArray_1,
  repeat: repeat_1,
  isNegativeZero: isNegativeZero_1,
  extend: extend_1
};

// YAML error class. http://stackoverflow.com/questions/8458984

function YAMLException(reason, mark) {
  // Super constructor
  Error.call(this);
  this.name = 'YAMLException';
  this.reason = reason;
  this.mark = mark;
  this.message = (this.reason || '(unknown reason)') + (this.mark ? ' ' + this.mark.toString() : ''); // Include stack trace in error object

  if (Error.captureStackTrace) {
    // Chrome and NodeJS
    Error.captureStackTrace(this, this.constructor);
  } else {
    // FF, IE 10+ and Safari 6+. Fallback for others
    this.stack = new Error().stack || '';
  }
} // Inherit from Error


YAMLException.prototype = Object.create(Error.prototype);
YAMLException.prototype.constructor = YAMLException;

YAMLException.prototype.toString = function toString(compact) {
  var result = this.name + ': ';
  result += this.reason || '(unknown reason)';

  if (!compact && this.mark) {
    result += ' ' + this.mark.toString();
  }

  return result;
};

var exception = YAMLException;

function Mark(name, buffer, position, line, column) {
  this.name = name;
  this.buffer = buffer;
  this.position = position;
  this.line = line;
  this.column = column;
}

Mark.prototype.getSnippet = function getSnippet(indent, maxLength) {
  var head, start, tail, end, snippet;
  if (!this.buffer) return null;
  indent = indent || 4;
  maxLength = maxLength || 75;
  head = '';
  start = this.position;

  while (start > 0 && '\x00\r\n\x85\u2028\u2029'.indexOf(this.buffer.charAt(start - 1)) === -1) {
    start -= 1;

    if (this.position - start > maxLength / 2 - 1) {
      head = ' ... ';
      start += 5;
      break;
    }
  }

  tail = '';
  end = this.position;

  while (end < this.buffer.length && '\x00\r\n\x85\u2028\u2029'.indexOf(this.buffer.charAt(end)) === -1) {
    end += 1;

    if (end - this.position > maxLength / 2 - 1) {
      tail = ' ... ';
      end -= 5;
      break;
    }
  }

  snippet = this.buffer.slice(start, end);
  return common.repeat(' ', indent) + head + snippet + tail + '\n' + common.repeat(' ', indent + this.position - start + head.length) + '^';
};

Mark.prototype.toString = function toString(compact) {
  var snippet,
      where = '';

  if (this.name) {
    where += 'in "' + this.name + '" ';
  }

  where += 'at line ' + (this.line + 1) + ', column ' + (this.column + 1);

  if (!compact) {
    snippet = this.getSnippet();

    if (snippet) {
      where += ':\n' + snippet;
    }
  }

  return where;
};

var mark = Mark;

var TYPE_CONSTRUCTOR_OPTIONS = ['kind', 'resolve', 'construct', 'instanceOf', 'predicate', 'represent', 'defaultStyle', 'styleAliases'];
var YAML_NODE_KINDS = ['scalar', 'sequence', 'mapping'];

function compileStyleAliases(map) {
  var result = {};

  if (map !== null) {
    Object.keys(map).forEach(function (style) {
      map[style].forEach(function (alias) {
        result[String(alias)] = style;
      });
    });
  }

  return result;
}

function Type(tag, options) {
  options = options || {};
  Object.keys(options).forEach(function (name) {
    if (TYPE_CONSTRUCTOR_OPTIONS.indexOf(name) === -1) {
      throw new exception('Unknown option "' + name + '" is met in definition of "' + tag + '" YAML type.');
    }
  }); // TODO: Add tag format check.

  this.tag = tag;
  this.kind = options['kind'] || null;

  this.resolve = options['resolve'] || function () {
    return true;
  };

  this.construct = options['construct'] || function (data) {
    return data;
  };

  this.instanceOf = options['instanceOf'] || null;
  this.predicate = options['predicate'] || null;
  this.represent = options['represent'] || null;
  this.defaultStyle = options['defaultStyle'] || null;
  this.styleAliases = compileStyleAliases(options['styleAliases'] || null);

  if (YAML_NODE_KINDS.indexOf(this.kind) === -1) {
    throw new exception('Unknown kind "' + this.kind + '" is specified for "' + tag + '" YAML type.');
  }
}

var type = Type;

/*eslint-disable max-len*/


function compileList(schema, name, result) {
  var exclude = [];
  schema.include.forEach(function (includedSchema) {
    result = compileList(includedSchema, name, result);
  });
  schema[name].forEach(function (currentType) {
    result.forEach(function (previousType, previousIndex) {
      if (previousType.tag === currentType.tag && previousType.kind === currentType.kind) {
        exclude.push(previousIndex);
      }
    });
    result.push(currentType);
  });
  return result.filter(function (type, index) {
    return exclude.indexOf(index) === -1;
  });
}

function compileMap()
/* lists... */
{
  var result = {
    scalar: {},
    sequence: {},
    mapping: {},
    fallback: {}
  },
      index,
      length;

  function collectType(type) {
    result[type.kind][type.tag] = result['fallback'][type.tag] = type;
  }

  for (index = 0, length = arguments.length; index < length; index += 1) {
    arguments[index].forEach(collectType);
  }

  return result;
}

function Schema(definition) {
  this.include = definition.include || [];
  this.implicit = definition.implicit || [];
  this.explicit = definition.explicit || [];
  this.implicit.forEach(function (type) {
    if (type.loadKind && type.loadKind !== 'scalar') {
      throw new exception('There is a non-scalar type in the implicit list of a schema. Implicit resolving of such types is not supported.');
    }
  });
  this.compiledImplicit = compileList(this, 'implicit', []);
  this.compiledExplicit = compileList(this, 'explicit', []);
  this.compiledTypeMap = compileMap(this.compiledImplicit, this.compiledExplicit);
}

Schema.DEFAULT = null;

Schema.create = function createSchema() {
  var schemas, types;

  switch (arguments.length) {
    case 1:
      schemas = Schema.DEFAULT;
      types = arguments[0];
      break;

    case 2:
      schemas = arguments[0];
      types = arguments[1];
      break;

    default:
      throw new exception('Wrong number of arguments for Schema.create function');
  }

  schemas = common.toArray(schemas);
  types = common.toArray(types);

  if (!schemas.every(function (schema) {
    return schema instanceof Schema;
  })) {
    throw new exception('Specified list of super schemas (or a single Schema object) contains a non-Schema object.');
  }

  if (!types.every(function (type$1) {
    return type$1 instanceof type;
  })) {
    throw new exception('Specified list of YAML types (or a single Type object) contains a non-Type object.');
  }

  return new Schema({
    include: schemas,
    explicit: types
  });
};

var schema = Schema;

var str = new type('tag:yaml.org,2002:str', {
  kind: 'scalar',
  construct: function construct(data) {
    return data !== null ? data : '';
  }
});

var seq = new type('tag:yaml.org,2002:seq', {
  kind: 'sequence',
  construct: function construct(data) {
    return data !== null ? data : [];
  }
});

var map = new type('tag:yaml.org,2002:map', {
  kind: 'mapping',
  construct: function construct(data) {
    return data !== null ? data : {};
  }
});

var failsafe = new schema({
  explicit: [str, seq, map]
});

function resolveYamlNull(data) {
  if (data === null) return true;
  var max = data.length;
  return max === 1 && data === '~' || max === 4 && (data === 'null' || data === 'Null' || data === 'NULL');
}

function constructYamlNull() {
  return null;
}

function isNull(object) {
  return object === null;
}

var _null = new type('tag:yaml.org,2002:null', {
  kind: 'scalar',
  resolve: resolveYamlNull,
  construct: constructYamlNull,
  predicate: isNull,
  represent: {
    canonical: function canonical() {
      return '~';
    },
    lowercase: function lowercase() {
      return 'null';
    },
    uppercase: function uppercase() {
      return 'NULL';
    },
    camelcase: function camelcase() {
      return 'Null';
    }
  },
  defaultStyle: 'lowercase'
});

function resolveYamlBoolean(data) {
  if (data === null) return false;
  var max = data.length;
  return max === 4 && (data === 'true' || data === 'True' || data === 'TRUE') || max === 5 && (data === 'false' || data === 'False' || data === 'FALSE');
}

function constructYamlBoolean(data) {
  return data === 'true' || data === 'True' || data === 'TRUE';
}

function isBoolean(object) {
  return Object.prototype.toString.call(object) === '[object Boolean]';
}

var bool = new type('tag:yaml.org,2002:bool', {
  kind: 'scalar',
  resolve: resolveYamlBoolean,
  construct: constructYamlBoolean,
  predicate: isBoolean,
  represent: {
    lowercase: function lowercase(object) {
      return object ? 'true' : 'false';
    },
    uppercase: function uppercase(object) {
      return object ? 'TRUE' : 'FALSE';
    },
    camelcase: function camelcase(object) {
      return object ? 'True' : 'False';
    }
  },
  defaultStyle: 'lowercase'
});

function isHexCode(c) {
  return 0x30
  /* 0 */
  <= c && c <= 0x39
  /* 9 */
  || 0x41
  /* A */
  <= c && c <= 0x46
  /* F */
  || 0x61
  /* a */
  <= c && c <= 0x66
  /* f */
  ;
}

function isOctCode(c) {
  return 0x30
  /* 0 */
  <= c && c <= 0x37
  /* 7 */
  ;
}

function isDecCode(c) {
  return 0x30
  /* 0 */
  <= c && c <= 0x39
  /* 9 */
  ;
}

function resolveYamlInteger(data) {
  if (data === null) return false;
  var max = data.length,
      index = 0,
      hasDigits = false,
      ch;
  if (!max) return false;
  ch = data[index]; // sign

  if (ch === '-' || ch === '+') {
    ch = data[++index];
  }

  if (ch === '0') {
    // 0
    if (index + 1 === max) return true;
    ch = data[++index]; // base 2, base 8, base 16

    if (ch === 'b') {
      // base 2
      index++;

      for (; index < max; index++) {
        ch = data[index];
        if (ch === '_') continue;
        if (ch !== '0' && ch !== '1') return false;
        hasDigits = true;
      }

      return hasDigits && ch !== '_';
    }

    if (ch === 'x') {
      // base 16
      index++;

      for (; index < max; index++) {
        ch = data[index];
        if (ch === '_') continue;
        if (!isHexCode(data.charCodeAt(index))) return false;
        hasDigits = true;
      }

      return hasDigits && ch !== '_';
    } // base 8


    for (; index < max; index++) {
      ch = data[index];
      if (ch === '_') continue;
      if (!isOctCode(data.charCodeAt(index))) return false;
      hasDigits = true;
    }

    return hasDigits && ch !== '_';
  } // base 10 (except 0) or base 60
  // value should not start with `_`;


  if (ch === '_') return false;

  for (; index < max; index++) {
    ch = data[index];
    if (ch === '_') continue;
    if (ch === ':') break;

    if (!isDecCode(data.charCodeAt(index))) {
      return false;
    }

    hasDigits = true;
  } // Should have digits and should not end with `_`


  if (!hasDigits || ch === '_') return false; // if !base60 - done;

  if (ch !== ':') return true; // base60 almost not used, no needs to optimize

  return /^(:[0-5]?[0-9])+$/.test(data.slice(index));
}

function constructYamlInteger(data) {
  var value = data,
      sign = 1,
      ch,
      base,
      digits = [];

  if (value.indexOf('_') !== -1) {
    value = value.replace(/_/g, '');
  }

  ch = value[0];

  if (ch === '-' || ch === '+') {
    if (ch === '-') sign = -1;
    value = value.slice(1);
    ch = value[0];
  }

  if (value === '0') return 0;

  if (ch === '0') {
    if (value[1] === 'b') return sign * parseInt(value.slice(2), 2);
    if (value[1] === 'x') return sign * parseInt(value, 16);
    return sign * parseInt(value, 8);
  }

  if (value.indexOf(':') !== -1) {
    value.split(':').forEach(function (v) {
      digits.unshift(parseInt(v, 10));
    });
    value = 0;
    base = 1;
    digits.forEach(function (d) {
      value += d * base;
      base *= 60;
    });
    return sign * value;
  }

  return sign * parseInt(value, 10);
}

function isInteger(object) {
  return Object.prototype.toString.call(object) === '[object Number]' && object % 1 === 0 && !common.isNegativeZero(object);
}

var int_1 = new type('tag:yaml.org,2002:int', {
  kind: 'scalar',
  resolve: resolveYamlInteger,
  construct: constructYamlInteger,
  predicate: isInteger,
  represent: {
    binary: function binary(obj) {
      return obj >= 0 ? '0b' + obj.toString(2) : '-0b' + obj.toString(2).slice(1);
    },
    octal: function octal(obj) {
      return obj >= 0 ? '0' + obj.toString(8) : '-0' + obj.toString(8).slice(1);
    },
    decimal: function decimal(obj) {
      return obj.toString(10);
    },

    /* eslint-disable max-len */
    hexadecimal: function hexadecimal(obj) {
      return obj >= 0 ? '0x' + obj.toString(16).toUpperCase() : '-0x' + obj.toString(16).toUpperCase().slice(1);
    }
  },
  defaultStyle: 'decimal',
  styleAliases: {
    binary: [2, 'bin'],
    octal: [8, 'oct'],
    decimal: [10, 'dec'],
    hexadecimal: [16, 'hex']
  }
});

var YAML_FLOAT_PATTERN = new RegExp( // 2.5e4, 2.5 and integers
'^(?:[-+]?(?:0|[1-9][0-9_]*)(?:\\.[0-9_]*)?(?:[eE][-+]?[0-9]+)?' + // .2e4, .2
// special case, seems not from spec
'|\\.[0-9_]+(?:[eE][-+]?[0-9]+)?' + // 20:59
'|[-+]?[0-9][0-9_]*(?::[0-5]?[0-9])+\\.[0-9_]*' + // .inf
'|[-+]?\\.(?:inf|Inf|INF)' + // .nan
'|\\.(?:nan|NaN|NAN))$');

function resolveYamlFloat(data) {
  if (data === null) return false;

  if (!YAML_FLOAT_PATTERN.test(data) || // Quick hack to not allow integers end with `_`
  // Probably should update regexp & check speed
  data[data.length - 1] === '_') {
    return false;
  }

  return true;
}

function constructYamlFloat(data) {
  var value, sign, base, digits;
  value = data.replace(/_/g, '').toLowerCase();
  sign = value[0] === '-' ? -1 : 1;
  digits = [];

  if ('+-'.indexOf(value[0]) >= 0) {
    value = value.slice(1);
  }

  if (value === '.inf') {
    return sign === 1 ? Number.POSITIVE_INFINITY : Number.NEGATIVE_INFINITY;
  } else if (value === '.nan') {
    return NaN;
  } else if (value.indexOf(':') >= 0) {
    value.split(':').forEach(function (v) {
      digits.unshift(parseFloat(v, 10));
    });
    value = 0.0;
    base = 1;
    digits.forEach(function (d) {
      value += d * base;
      base *= 60;
    });
    return sign * value;
  }

  return sign * parseFloat(value, 10);
}

var SCIENTIFIC_WITHOUT_DOT = /^[-+]?[0-9]+e/;

function representYamlFloat(object, style) {
  var res;

  if (isNaN(object)) {
    switch (style) {
      case 'lowercase':
        return '.nan';

      case 'uppercase':
        return '.NAN';

      case 'camelcase':
        return '.NaN';
    }
  } else if (Number.POSITIVE_INFINITY === object) {
    switch (style) {
      case 'lowercase':
        return '.inf';

      case 'uppercase':
        return '.INF';

      case 'camelcase':
        return '.Inf';
    }
  } else if (Number.NEGATIVE_INFINITY === object) {
    switch (style) {
      case 'lowercase':
        return '-.inf';

      case 'uppercase':
        return '-.INF';

      case 'camelcase':
        return '-.Inf';
    }
  } else if (common.isNegativeZero(object)) {
    return '-0.0';
  }

  res = object.toString(10); // JS stringifier can build scientific format without dots: 5e-100,
  // while YAML requres dot: 5.e-100. Fix it with simple hack

  return SCIENTIFIC_WITHOUT_DOT.test(res) ? res.replace('e', '.e') : res;
}

function isFloat(object) {
  return Object.prototype.toString.call(object) === '[object Number]' && (object % 1 !== 0 || common.isNegativeZero(object));
}

var float_1 = new type('tag:yaml.org,2002:float', {
  kind: 'scalar',
  resolve: resolveYamlFloat,
  construct: constructYamlFloat,
  predicate: isFloat,
  represent: representYamlFloat,
  defaultStyle: 'lowercase'
});

var json = new schema({
  include: [failsafe],
  implicit: [_null, bool, int_1, float_1]
});

var core = new schema({
  include: [json]
});

var YAML_DATE_REGEXP = new RegExp('^([0-9][0-9][0-9][0-9])' + // [1] year
'-([0-9][0-9])' + // [2] month
'-([0-9][0-9])$'); // [3] day

var YAML_TIMESTAMP_REGEXP = new RegExp('^([0-9][0-9][0-9][0-9])' + // [1] year
'-([0-9][0-9]?)' + // [2] month
'-([0-9][0-9]?)' + // [3] day
'(?:[Tt]|[ \\t]+)' + // ...
'([0-9][0-9]?)' + // [4] hour
':([0-9][0-9])' + // [5] minute
':([0-9][0-9])' + // [6] second
'(?:\\.([0-9]*))?' + // [7] fraction
'(?:[ \\t]*(Z|([-+])([0-9][0-9]?)' + // [8] tz [9] tz_sign [10] tz_hour
'(?::([0-9][0-9]))?))?$'); // [11] tz_minute

function resolveYamlTimestamp(data) {
  if (data === null) return false;
  if (YAML_DATE_REGEXP.exec(data) !== null) return true;
  if (YAML_TIMESTAMP_REGEXP.exec(data) !== null) return true;
  return false;
}

function constructYamlTimestamp(data) {
  var match,
      year,
      month,
      day,
      hour,
      minute,
      second,
      fraction = 0,
      delta = null,
      tz_hour,
      tz_minute,
      date;
  match = YAML_DATE_REGEXP.exec(data);
  if (match === null) match = YAML_TIMESTAMP_REGEXP.exec(data);
  if (match === null) throw new Error('Date resolve error'); // match: [1] year [2] month [3] day

  year = +match[1];
  month = +match[2] - 1; // JS month starts with 0

  day = +match[3];

  if (!match[4]) {
    // no hour
    return new Date(Date.UTC(year, month, day));
  } // match: [4] hour [5] minute [6] second [7] fraction


  hour = +match[4];
  minute = +match[5];
  second = +match[6];

  if (match[7]) {
    fraction = match[7].slice(0, 3);

    while (fraction.length < 3) {
      // milli-seconds
      fraction += '0';
    }

    fraction = +fraction;
  } // match: [8] tz [9] tz_sign [10] tz_hour [11] tz_minute


  if (match[9]) {
    tz_hour = +match[10];
    tz_minute = +(match[11] || 0);
    delta = (tz_hour * 60 + tz_minute) * 60000; // delta in mili-seconds

    if (match[9] === '-') delta = -delta;
  }

  date = new Date(Date.UTC(year, month, day, hour, minute, second, fraction));
  if (delta) date.setTime(date.getTime() - delta);
  return date;
}

function representYamlTimestamp(object
/*, style*/
) {
  return object.toISOString();
}

var timestamp = new type('tag:yaml.org,2002:timestamp', {
  kind: 'scalar',
  resolve: resolveYamlTimestamp,
  construct: constructYamlTimestamp,
  instanceOf: Date,
  represent: representYamlTimestamp
});

function resolveYamlMerge(data) {
  return data === '<<' || data === null;
}

var merge = new type('tag:yaml.org,2002:merge', {
  kind: 'scalar',
  resolve: resolveYamlMerge
});

function commonjsRequire () {
	throw new Error('Dynamic requires are not currently supported by rollup-plugin-commonjs');
}

function createCommonjsModule(fn, module) {
	return module = { exports: {} }, fn(module, module.exports), module.exports;
}

function getCjsExportFromNamespace (n) {
	return n && n['default'] || n;
}

/*eslint-disable no-bitwise*/


var NodeBuffer;

try {
  // A trick for browserified version, to not include `Buffer` shim
  var _require = commonjsRequire;
  NodeBuffer = _require('buffer').Buffer;
} catch (__) {} // [ 64, 65, 66 ] -> [ padding, CR, LF ]


var BASE64_MAP = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=\n\r';

function resolveYamlBinary(data) {
  if (data === null) return false;
  var code,
      idx,
      bitlen = 0,
      max = data.length,
      map = BASE64_MAP; // Convert one by one.

  for (idx = 0; idx < max; idx++) {
    code = map.indexOf(data.charAt(idx)); // Skip CR/LF

    if (code > 64) continue; // Fail on illegal characters

    if (code < 0) return false;
    bitlen += 6;
  } // If there are any bits left, source was corrupted


  return bitlen % 8 === 0;
}

function constructYamlBinary(data) {
  var idx,
      tailbits,
      input = data.replace(/[\r\n=]/g, ''),
      // remove CR/LF & padding to simplify scan
  max = input.length,
      map = BASE64_MAP,
      bits = 0,
      result = []; // Collect by 6*4 bits (3 bytes)

  for (idx = 0; idx < max; idx++) {
    if (idx % 4 === 0 && idx) {
      result.push(bits >> 16 & 0xFF);
      result.push(bits >> 8 & 0xFF);
      result.push(bits & 0xFF);
    }

    bits = bits << 6 | map.indexOf(input.charAt(idx));
  } // Dump tail


  tailbits = max % 4 * 6;

  if (tailbits === 0) {
    result.push(bits >> 16 & 0xFF);
    result.push(bits >> 8 & 0xFF);
    result.push(bits & 0xFF);
  } else if (tailbits === 18) {
    result.push(bits >> 10 & 0xFF);
    result.push(bits >> 2 & 0xFF);
  } else if (tailbits === 12) {
    result.push(bits >> 4 & 0xFF);
  } // Wrap into Buffer for NodeJS and leave Array for browser


  if (NodeBuffer) {
    // Support node 6.+ Buffer API when available
    return NodeBuffer.from ? NodeBuffer.from(result) : new NodeBuffer(result);
  }

  return result;
}

function representYamlBinary(object
/*, style*/
) {
  var result = '',
      bits = 0,
      idx,
      tail,
      max = object.length,
      map = BASE64_MAP; // Convert every three bytes to 4 ASCII characters.

  for (idx = 0; idx < max; idx++) {
    if (idx % 3 === 0 && idx) {
      result += map[bits >> 18 & 0x3F];
      result += map[bits >> 12 & 0x3F];
      result += map[bits >> 6 & 0x3F];
      result += map[bits & 0x3F];
    }

    bits = (bits << 8) + object[idx];
  } // Dump tail


  tail = max % 3;

  if (tail === 0) {
    result += map[bits >> 18 & 0x3F];
    result += map[bits >> 12 & 0x3F];
    result += map[bits >> 6 & 0x3F];
    result += map[bits & 0x3F];
  } else if (tail === 2) {
    result += map[bits >> 10 & 0x3F];
    result += map[bits >> 4 & 0x3F];
    result += map[bits << 2 & 0x3F];
    result += map[64];
  } else if (tail === 1) {
    result += map[bits >> 2 & 0x3F];
    result += map[bits << 4 & 0x3F];
    result += map[64];
    result += map[64];
  }

  return result;
}

function isBinary(object) {
  return NodeBuffer && NodeBuffer.isBuffer(object);
}

var binary = new type('tag:yaml.org,2002:binary', {
  kind: 'scalar',
  resolve: resolveYamlBinary,
  construct: constructYamlBinary,
  predicate: isBinary,
  represent: representYamlBinary
});

var _hasOwnProperty = Object.prototype.hasOwnProperty;
var _toString = Object.prototype.toString;

function resolveYamlOmap(data) {
  if (data === null) return true;
  var objectKeys = [],
      index,
      length,
      pair,
      pairKey,
      pairHasKey,
      object = data;

  for (index = 0, length = object.length; index < length; index += 1) {
    pair = object[index];
    pairHasKey = false;
    if (_toString.call(pair) !== '[object Object]') return false;

    for (pairKey in pair) {
      if (_hasOwnProperty.call(pair, pairKey)) {
        if (!pairHasKey) pairHasKey = true;else return false;
      }
    }

    if (!pairHasKey) return false;
    if (objectKeys.indexOf(pairKey) === -1) objectKeys.push(pairKey);else return false;
  }

  return true;
}

function constructYamlOmap(data) {
  return data !== null ? data : [];
}

var omap = new type('tag:yaml.org,2002:omap', {
  kind: 'sequence',
  resolve: resolveYamlOmap,
  construct: constructYamlOmap
});

var _toString$1 = Object.prototype.toString;

function resolveYamlPairs(data) {
  if (data === null) return true;
  var index,
      length,
      pair,
      keys,
      result,
      object = data;
  result = new Array(object.length);

  for (index = 0, length = object.length; index < length; index += 1) {
    pair = object[index];
    if (_toString$1.call(pair) !== '[object Object]') return false;
    keys = Object.keys(pair);
    if (keys.length !== 1) return false;
    result[index] = [keys[0], pair[keys[0]]];
  }

  return true;
}

function constructYamlPairs(data) {
  if (data === null) return [];
  var index,
      length,
      pair,
      keys,
      result,
      object = data;
  result = new Array(object.length);

  for (index = 0, length = object.length; index < length; index += 1) {
    pair = object[index];
    keys = Object.keys(pair);
    result[index] = [keys[0], pair[keys[0]]];
  }

  return result;
}

var pairs = new type('tag:yaml.org,2002:pairs', {
  kind: 'sequence',
  resolve: resolveYamlPairs,
  construct: constructYamlPairs
});

var _hasOwnProperty$1 = Object.prototype.hasOwnProperty;

function resolveYamlSet(data) {
  if (data === null) return true;
  var key,
      object = data;

  for (key in object) {
    if (_hasOwnProperty$1.call(object, key)) {
      if (object[key] !== null) return false;
    }
  }

  return true;
}

function constructYamlSet(data) {
  return data !== null ? data : {};
}

var set = new type('tag:yaml.org,2002:set', {
  kind: 'mapping',
  resolve: resolveYamlSet,
  construct: constructYamlSet
});

var default_safe = new schema({
  include: [core],
  implicit: [timestamp, merge],
  explicit: [binary, omap, pairs, set]
});

function resolveJavascriptUndefined() {
  return true;
}

function constructJavascriptUndefined() {
  /*eslint-disable no-undefined*/
  return undefined;
}

function representJavascriptUndefined() {
  return '';
}

function isUndefined(object) {
  return typeof object === 'undefined';
}

var _undefined = new type('tag:yaml.org,2002:js/undefined', {
  kind: 'scalar',
  resolve: resolveJavascriptUndefined,
  construct: constructJavascriptUndefined,
  predicate: isUndefined,
  represent: representJavascriptUndefined
});

function resolveJavascriptRegExp(data) {
  if (data === null) return false;
  if (data.length === 0) return false;
  var regexp = data,
      tail = /\/([gim]*)$/.exec(data),
      modifiers = ''; // if regexp starts with '/' it can have modifiers and must be properly closed
  // `/foo/gim` - modifiers tail can be maximum 3 chars

  if (regexp[0] === '/') {
    if (tail) modifiers = tail[1];
    if (modifiers.length > 3) return false; // if expression starts with /, is should be properly terminated

    if (regexp[regexp.length - modifiers.length - 1] !== '/') return false;
  }

  return true;
}

function constructJavascriptRegExp(data) {
  var regexp = data,
      tail = /\/([gim]*)$/.exec(data),
      modifiers = ''; // `/foo/gim` - tail can be maximum 4 chars

  if (regexp[0] === '/') {
    if (tail) modifiers = tail[1];
    regexp = regexp.slice(1, regexp.length - modifiers.length - 1);
  }

  return new RegExp(regexp, modifiers);
}

function representJavascriptRegExp(object
/*, style*/
) {
  var result = '/' + object.source + '/';
  if (object.global) result += 'g';
  if (object.multiline) result += 'm';
  if (object.ignoreCase) result += 'i';
  return result;
}

function isRegExp(object) {
  return Object.prototype.toString.call(object) === '[object RegExp]';
}

var regexp = new type('tag:yaml.org,2002:js/regexp', {
  kind: 'scalar',
  resolve: resolveJavascriptRegExp,
  construct: constructJavascriptRegExp,
  predicate: isRegExp,
  represent: representJavascriptRegExp
});

var esprima; // Browserified version does not have esprima
//
// 1. For node.js just require module as deps
// 2. For browser try to require mudule via external AMD system.
//    If not found - try to fallback to window.esprima. If not
//    found too - then fail to parse.
//

try {
  // workaround to exclude package from browserify list.
  var _require$1 = commonjsRequire;
  esprima = _require$1('esprima');
} catch (_) {
  /*global window */
  if (typeof window !== 'undefined') esprima = window.esprima;
}

function resolveJavascriptFunction(data) {
  if (data === null) return false;

  try {
    var source = '(' + data + ')',
        ast = esprima.parse(source, {
      range: true
    });

    if (ast.type !== 'Program' || ast.body.length !== 1 || ast.body[0].type !== 'ExpressionStatement' || ast.body[0].expression.type !== 'ArrowFunctionExpression' && ast.body[0].expression.type !== 'FunctionExpression') {
      return false;
    }

    return true;
  } catch (err) {
    return false;
  }
}

function constructJavascriptFunction(data) {
  /*jslint evil:true*/
  var source = '(' + data + ')',
      ast = esprima.parse(source, {
    range: true
  }),
      params = [],
      body;

  if (ast.type !== 'Program' || ast.body.length !== 1 || ast.body[0].type !== 'ExpressionStatement' || ast.body[0].expression.type !== 'ArrowFunctionExpression' && ast.body[0].expression.type !== 'FunctionExpression') {
    throw new Error('Failed to resolve function');
  }

  ast.body[0].expression.params.forEach(function (param) {
    params.push(param.name);
  });
  body = ast.body[0].expression.body.range; // Esprima's ranges include the first '{' and the last '}' characters on
  // function expressions. So cut them out.

  if (ast.body[0].expression.body.type === 'BlockStatement') {
    /*eslint-disable no-new-func*/
    return new Function(params, source.slice(body[0] + 1, body[1] - 1));
  } // ES6 arrow functions can omit the BlockStatement. In that case, just return
  // the body.

  /*eslint-disable no-new-func*/


  return new Function(params, 'return ' + source.slice(body[0], body[1]));
}

function representJavascriptFunction(object
/*, style*/
) {
  return object.toString();
}

function isFunction(object) {
  return Object.prototype.toString.call(object) === '[object Function]';
}

var _function = new type('tag:yaml.org,2002:js/function', {
  kind: 'scalar',
  resolve: resolveJavascriptFunction,
  construct: constructJavascriptFunction,
  predicate: isFunction,
  represent: representJavascriptFunction
});

var default_full = schema.DEFAULT = new schema({
  include: [default_safe],
  explicit: [_undefined, regexp, _function]
});

/*eslint-disable max-len,no-use-before-define*/


var _hasOwnProperty$2 = Object.prototype.hasOwnProperty;
var CONTEXT_FLOW_IN = 1;
var CONTEXT_FLOW_OUT = 2;
var CONTEXT_BLOCK_IN = 3;
var CONTEXT_BLOCK_OUT = 4;
var CHOMPING_CLIP = 1;
var CHOMPING_STRIP = 2;
var CHOMPING_KEEP = 3;
var PATTERN_NON_PRINTABLE = /[\x00-\x08\x0B\x0C\x0E-\x1F\x7F-\x84\x86-\x9F\uFFFE\uFFFF]|[\uD800-\uDBFF](?![\uDC00-\uDFFF])|(?:[^\uD800-\uDBFF]|^)[\uDC00-\uDFFF]/;
var PATTERN_NON_ASCII_LINE_BREAKS = /[\x85\u2028\u2029]/;
var PATTERN_FLOW_INDICATORS = /[,\[\]\{\}]/;
var PATTERN_TAG_HANDLE = /^(?:!|!!|![a-z\-]+!)$/i;
var PATTERN_TAG_URI = /^(?:!|[^,\[\]\{\}])(?:%[0-9a-f]{2}|[0-9a-z\-#;\/\?:@&=\+\$,_\.!~\*'\(\)\[\]])*$/i;

function _class(obj) {
  return Object.prototype.toString.call(obj);
}

function is_EOL(c) {
  return c === 0x0A
  /* LF */
  || c === 0x0D
  /* CR */
  ;
}

function is_WHITE_SPACE(c) {
  return c === 0x09
  /* Tab */
  || c === 0x20
  /* Space */
  ;
}

function is_WS_OR_EOL(c) {
  return c === 0x09
  /* Tab */
  || c === 0x20
  /* Space */
  || c === 0x0A
  /* LF */
  || c === 0x0D
  /* CR */
  ;
}

function is_FLOW_INDICATOR(c) {
  return c === 0x2C
  /* , */
  || c === 0x5B
  /* [ */
  || c === 0x5D
  /* ] */
  || c === 0x7B
  /* { */
  || c === 0x7D
  /* } */
  ;
}

function fromHexCode(c) {
  var lc;

  if (0x30
  /* 0 */
  <= c && c <= 0x39
  /* 9 */
  ) {
    return c - 0x30;
  }
  /*eslint-disable no-bitwise*/


  lc = c | 0x20;

  if (0x61
  /* a */
  <= lc && lc <= 0x66
  /* f */
  ) {
    return lc - 0x61 + 10;
  }

  return -1;
}

function escapedHexLen(c) {
  if (c === 0x78
  /* x */
  ) {
      return 2;
    }

  if (c === 0x75
  /* u */
  ) {
      return 4;
    }

  if (c === 0x55
  /* U */
  ) {
      return 8;
    }

  return 0;
}

function fromDecimalCode(c) {
  if (0x30
  /* 0 */
  <= c && c <= 0x39
  /* 9 */
  ) {
    return c - 0x30;
  }

  return -1;
}

function simpleEscapeSequence(c) {
  /* eslint-disable indent */
  return c === 0x30
  /* 0 */
  ? '\x00' : c === 0x61
  /* a */
  ? '\x07' : c === 0x62
  /* b */
  ? '\x08' : c === 0x74
  /* t */
  ? '\x09' : c === 0x09
  /* Tab */
  ? '\x09' : c === 0x6E
  /* n */
  ? '\x0A' : c === 0x76
  /* v */
  ? '\x0B' : c === 0x66
  /* f */
  ? '\x0C' : c === 0x72
  /* r */
  ? '\x0D' : c === 0x65
  /* e */
  ? '\x1B' : c === 0x20
  /* Space */
  ? ' ' : c === 0x22
  /* " */
  ? '\x22' : c === 0x2F
  /* / */
  ? '/' : c === 0x5C
  /* \ */
  ? '\x5C' : c === 0x4E
  /* N */
  ? '\x85' : c === 0x5F
  /* _ */
  ? '\xA0' : c === 0x4C
  /* L */
  ? '\u2028' : c === 0x50
  /* P */
  ? '\u2029' : '';
}

function charFromCodepoint(c) {
  if (c <= 0xFFFF) {
    return String.fromCharCode(c);
  } // Encode UTF-16 surrogate pair
  // https://en.wikipedia.org/wiki/UTF-16#Code_points_U.2B010000_to_U.2B10FFFF


  return String.fromCharCode((c - 0x010000 >> 10) + 0xD800, (c - 0x010000 & 0x03FF) + 0xDC00);
}

var simpleEscapeCheck = new Array(256); // integer, for fast access

var simpleEscapeMap = new Array(256);

for (var i = 0; i < 256; i++) {
  simpleEscapeCheck[i] = simpleEscapeSequence(i) ? 1 : 0;
  simpleEscapeMap[i] = simpleEscapeSequence(i);
}

function State(input, options) {
  this.input = input;
  this.filename = options['filename'] || null;
  this.schema = options['schema'] || default_full;
  this.onWarning = options['onWarning'] || null;
  this.legacy = options['legacy'] || false;
  this.json = options['json'] || false;
  this.listener = options['listener'] || null;
  this.implicitTypes = this.schema.compiledImplicit;
  this.typeMap = this.schema.compiledTypeMap;
  this.length = input.length;
  this.position = 0;
  this.line = 0;
  this.lineStart = 0;
  this.lineIndent = 0;
  this.documents = [];
  /*
  this.version;
  this.checkLineBreaks;
  this.tagMap;
  this.anchorMap;
  this.tag;
  this.anchor;
  this.kind;
  this.result;*/
}

function generateError(state, message) {
  return new exception(message, new mark(state.filename, state.input, state.position, state.line, state.position - state.lineStart));
}

function throwError(state, message) {
  throw generateError(state, message);
}

function throwWarning(state, message) {
  if (state.onWarning) {
    state.onWarning.call(null, generateError(state, message));
  }
}

var directiveHandlers = {
  YAML: function handleYamlDirective(state, name, args) {
    var match, major, minor;

    if (state.version !== null) {
      throwError(state, 'duplication of %YAML directive');
    }

    if (args.length !== 1) {
      throwError(state, 'YAML directive accepts exactly one argument');
    }

    match = /^([0-9]+)\.([0-9]+)$/.exec(args[0]);

    if (match === null) {
      throwError(state, 'ill-formed argument of the YAML directive');
    }

    major = parseInt(match[1], 10);
    minor = parseInt(match[2], 10);

    if (major !== 1) {
      throwError(state, 'unacceptable YAML version of the document');
    }

    state.version = args[0];
    state.checkLineBreaks = minor < 2;

    if (minor !== 1 && minor !== 2) {
      throwWarning(state, 'unsupported YAML version of the document');
    }
  },
  TAG: function handleTagDirective(state, name, args) {
    var handle, prefix;

    if (args.length !== 2) {
      throwError(state, 'TAG directive accepts exactly two arguments');
    }

    handle = args[0];
    prefix = args[1];

    if (!PATTERN_TAG_HANDLE.test(handle)) {
      throwError(state, 'ill-formed tag handle (first argument) of the TAG directive');
    }

    if (_hasOwnProperty$2.call(state.tagMap, handle)) {
      throwError(state, 'there is a previously declared suffix for "' + handle + '" tag handle');
    }

    if (!PATTERN_TAG_URI.test(prefix)) {
      throwError(state, 'ill-formed tag prefix (second argument) of the TAG directive');
    }

    state.tagMap[handle] = prefix;
  }
};

function captureSegment(state, start, end, checkJson) {
  var _position, _length, _character, _result;

  if (start < end) {
    _result = state.input.slice(start, end);

    if (checkJson) {
      for (_position = 0, _length = _result.length; _position < _length; _position += 1) {
        _character = _result.charCodeAt(_position);

        if (!(_character === 0x09 || 0x20 <= _character && _character <= 0x10FFFF)) {
          throwError(state, 'expected valid JSON character');
        }
      }
    } else if (PATTERN_NON_PRINTABLE.test(_result)) {
      throwError(state, 'the stream contains non-printable characters');
    }

    state.result += _result;
  }
}

function mergeMappings(state, destination, source, overridableKeys) {
  var sourceKeys, key, index, quantity;

  if (!common.isObject(source)) {
    throwError(state, 'cannot merge mappings; the provided source object is unacceptable');
  }

  sourceKeys = Object.keys(source);

  for (index = 0, quantity = sourceKeys.length; index < quantity; index += 1) {
    key = sourceKeys[index];

    if (!_hasOwnProperty$2.call(destination, key)) {
      destination[key] = source[key];
      overridableKeys[key] = true;
    }
  }
}

function storeMappingPair(state, _result, overridableKeys, keyTag, keyNode, valueNode, startLine, startPos) {
  var index, quantity; // The output is a plain object here, so keys can only be strings.
  // We need to convert keyNode to a string, but doing so can hang the process
  // (deeply nested arrays that explode exponentially using aliases).

  if (Array.isArray(keyNode)) {
    keyNode = Array.prototype.slice.call(keyNode);

    for (index = 0, quantity = keyNode.length; index < quantity; index += 1) {
      if (Array.isArray(keyNode[index])) {
        throwError(state, 'nested arrays are not supported inside keys');
      }

      if (typeof keyNode === 'object' && _class(keyNode[index]) === '[object Object]') {
        keyNode[index] = '[object Object]';
      }
    }
  } // Avoid code execution in load() via toString property
  // (still use its own toString for arrays, timestamps,
  // and whatever user schema extensions happen to have @@toStringTag)


  if (typeof keyNode === 'object' && _class(keyNode) === '[object Object]') {
    keyNode = '[object Object]';
  }

  keyNode = String(keyNode);

  if (_result === null) {
    _result = {};
  }

  if (keyTag === 'tag:yaml.org,2002:merge') {
    if (Array.isArray(valueNode)) {
      for (index = 0, quantity = valueNode.length; index < quantity; index += 1) {
        mergeMappings(state, _result, valueNode[index], overridableKeys);
      }
    } else {
      mergeMappings(state, _result, valueNode, overridableKeys);
    }
  } else {
    if (!state.json && !_hasOwnProperty$2.call(overridableKeys, keyNode) && _hasOwnProperty$2.call(_result, keyNode)) {
      state.line = startLine || state.line;
      state.position = startPos || state.position;
      throwError(state, 'duplicated mapping key');
    }

    _result[keyNode] = valueNode;
    delete overridableKeys[keyNode];
  }

  return _result;
}

function readLineBreak(state) {
  var ch;
  ch = state.input.charCodeAt(state.position);

  if (ch === 0x0A
  /* LF */
  ) {
      state.position++;
    } else if (ch === 0x0D
  /* CR */
  ) {
      state.position++;

      if (state.input.charCodeAt(state.position) === 0x0A
      /* LF */
      ) {
          state.position++;
        }
    } else {
    throwError(state, 'a line break is expected');
  }

  state.line += 1;
  state.lineStart = state.position;
}

function skipSeparationSpace(state, allowComments, checkIndent) {
  var lineBreaks = 0,
      ch = state.input.charCodeAt(state.position);

  while (ch !== 0) {
    while (is_WHITE_SPACE(ch)) {
      ch = state.input.charCodeAt(++state.position);
    }

    if (allowComments && ch === 0x23
    /* # */
    ) {
        do {
          ch = state.input.charCodeAt(++state.position);
        } while (ch !== 0x0A
        /* LF */
        && ch !== 0x0D
        /* CR */
        && ch !== 0);
      }

    if (is_EOL(ch)) {
      readLineBreak(state);
      ch = state.input.charCodeAt(state.position);
      lineBreaks++;
      state.lineIndent = 0;

      while (ch === 0x20
      /* Space */
      ) {
        state.lineIndent++;
        ch = state.input.charCodeAt(++state.position);
      }
    } else {
      break;
    }
  }

  if (checkIndent !== -1 && lineBreaks !== 0 && state.lineIndent < checkIndent) {
    throwWarning(state, 'deficient indentation');
  }

  return lineBreaks;
}

function testDocumentSeparator(state) {
  var _position = state.position,
      ch;
  ch = state.input.charCodeAt(_position); // Condition state.position === state.lineStart is tested
  // in parent on each call, for efficiency. No needs to test here