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function _typeof(obj) {
  "@babel/helpers - typeof";

if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") {
    _typeof = function (obj) {
      return typeof obj;
    };
  } else {
    _typeof = function (obj) {
      return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
    };
  }

return _typeof(obj);
}

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 _defineProperty(obj, key, value) {
  if (key in obj) {
    Object.defineProperty(obj, key, {
      value: value,
      enumerable: true,
      configurable: true,
      writable: true
    });
  } else {
    obj[key] = value;
  }

return obj;
}

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 {
    Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {}));
    return true;
  } catch (e) {
    return false;
  }
}

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);
}

function _createSuper(Derived) {
  var hasNativeReflectConstruct = _isNativeReflectConstruct();

return function _createSuperInternal() {
    var Super = _getPrototypeOf(Derived),
        result;

if (hasNativeReflectConstruct) {
      var NewTarget = _getPrototypeOf(this).constructor;

result = Reflect.construct(Super, arguments, NewTarget);
    } else {
      result = Super.apply(this, arguments);
    }

return _possibleConstructorReturn(this, result);
  };
}

function _superPropBase(object, property) {
  while (!Object.prototype.hasOwnProperty.call(object, property)) {
    object = _getPrototypeOf(object);
    if (object === null) break;
  }

return object;
}

function _get(target, property, receiver) {
  if (typeof Reflect !== "undefined" && Reflect.get) {
    _get = Reflect.get;
  } else {
    _get = function _get(target, property, receiver) {
      var base = _superPropBase(target, property);

if (!base) return;
      var desc = Object.getOwnPropertyDescriptor(base, property);

if (desc.get) {
        return desc.get.call(receiver);
      }

return desc.value;
    };
  }

return _get(target, property, receiver || target);
}

function _slicedToArray(arr, i) {
  return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _unsupportedIterableToArray(arr, i) || _nonIterableRest();
}

function _toArray(arr) {
  return _arrayWithHoles(arr) || _iterableToArray(arr) || _unsupportedIterableToArray(arr) || _nonIterableRest();
}

function _arrayWithHoles(arr) {
  if (Array.isArray(arr)) return arr;
}

function _iterableToArray(iter) {
  if (typeof Symbol !== "undefined" && Symbol.iterator in Object(iter)) return Array.from(iter);
}

function _iterableToArrayLimit(arr, i) {
  if (typeof Symbol === "undefined" || !(Symbol.iterator in Object(arr))) return;
  var _arr = [];
  var _n = true;
  var _d = false;
  var _e = undefined;

try {
    for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) {
      _arr.push(_s.value);

if (i && _arr.length === i) break;
    }
  } catch (err) {
    _d = true;
    _e = err;
  } finally {
    try {
      if (!_n && _i["return"] != null) _i["return"]();
    } finally {
      if (_d) throw _e;
    }
  }

return _arr;
}

function _unsupportedIterableToArray(o, minLen) {
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  if (typeof o === "string") return _arrayLikeToArray(o, minLen);
  var n = Object.prototype.toString.call(o).slice(8, -1);
  if (n === "Object" && o.constructor) n = o.constructor.name;
  if (n === "Map" || n === "Set") return Array.from(o);
  if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen);
}

function _arrayLikeToArray(arr, len) {
  if (len == null || len > arr.length) len = arr.length;

for (var i = 0, arr2 = new Array(len); i < len; i++) arr2[i] = arr[i];

return arr2;
}

function _nonIterableRest() {
  throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
}

function _createForOfIteratorHelper(o, allowArrayLike) {
  var it;

if (typeof Symbol === "undefined" || o[Symbol.iterator] == null) {
    if (Array.isArray(o) || (it = _unsupportedIterableToArray(o)) || allowArrayLike && o && typeof o.length === "number") {
      if (it) o = it;
      var i = 0;

var F = function () {};

return {
        s: F,
        n: function () {
          if (i >= o.length) return {
            done: true
          };
          return {
            done: false,
            value: o[i++]
          };
        },
        e: function (e) {
          throw e;
        },
        f: F
      };
    }

throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
  }

function findLineStarts(src) {
  var ls = [0];
  var offset = src.indexOf('\n');

while (offset !== -1) {
    offset += 1;
    ls.push(offset);
    offset = src.indexOf('\n', offset);
  }

return ls;
}

function getSrcInfo(cst) {
  var lineStarts, src;

if (typeof cst === 'string') {
    lineStarts = findLineStarts(cst);
    src = cst;
  } else {
    if (Array.isArray(cst)) cst = cst[0];

if (cst && cst.context) {
      if (!cst.lineStarts) cst.lineStarts = findLineStarts(cst.context.src);
      lineStarts = cst.lineStarts;
      src = cst.context.src;
    }
  }

return {
    lineStarts: lineStarts,
    src: src
  };
}
/**
 * @typedef {Object} LinePos - One-indexed position in the source
 * @property {number} line
 * @property {number} col
 */

/**
 * Determine the line/col position matching a character offset.
 *
 * Accepts a source string or a CST document as the second parameter. With
 * the latter, starting indices for lines are cached in the document as
 * `lineStarts: number[]`.
 *
 * Returns a one-indexed `{ line, col }` location if found, or
 * `undefined` otherwise.
 *
 * @param {number} offset
 * @param {string|Document|Document[]} cst
 * @returns {?LinePos}
 */

function getLinePos(offset, cst) {
  if (typeof offset !== 'number' || offset < 0) return null;

var _getSrcInfo = getSrcInfo(cst),
      lineStarts = _getSrcInfo.lineStarts,
      src = _getSrcInfo.src;

if (!lineStarts || !src || offset > src.length) return null;

for (var i = 0; i < lineStarts.length; ++i) {
    var start = lineStarts[i];

if (offset < start) {
      return {
        line: i,
        col: offset - lineStarts[i - 1] + 1
      };
    }

if (offset === start) return {
      line: i + 1,
      col: 1
    };
  }

var line = lineStarts.length;
  return {
    line: line,
    col: offset - lineStarts[line - 1] + 1
  };
}
/**
 * Get a specified line from the source.
 *
 * Accepts a source string or a CST document as the second parameter. With
 * the latter, starting indices for lines are cached in the document as
 * `lineStarts: number[]`.
 *
 * Returns the line as a string if found, or `null` otherwise.
 *
 * @param {number} line One-indexed line number
 * @param {string|Document|Document[]} cst
 * @returns {?string}
 */

function getLine(line, cst) {
  var _getSrcInfo2 = getSrcInfo(cst),
      lineStarts = _getSrcInfo2.lineStarts,
      src = _getSrcInfo2.src;

if (!lineStarts || !(line >= 1) || line > lineStarts.length) return null;
  var start = lineStarts[line - 1];
  var end = lineStarts[line]; // undefined for last line; that's ok for slice()

while (end && end > start && src[end - 1] === '\n') {
    --end;
  }

return src.slice(start, end);
}
/**
 * Pretty-print the starting line from the source indicated by the range `pos`
 *
 * Trims output to `maxWidth` chars while keeping the starting column visible,
 * using `…` at either end to indicate dropped characters.
 *
 * Returns a two-line string (or `null`) with `\n` as separator; the second line
 * will hold appropriately indented `^` marks indicating the column range.
 *
 * @param {Object} pos
 * @param {LinePos} pos.start
 * @param {LinePos} [pos.end]
 * @param {string|Document|Document[]*} cst
 * @param {number} [maxWidth=80]
 * @returns {?string}
 */

function getPrettyContext(_ref, cst) {
  var start = _ref.start,
      end = _ref.end;
  var maxWidth = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 80;
  var src = getLine(start.line, cst);
  if (!src) return null;
  var col = start.col;

if (src.length > maxWidth) {
    if (col <= maxWidth - 10) {
      src = src.substr(0, maxWidth - 1) + '…';
    } else {
      var halfWidth = Math.round(maxWidth / 2);
      if (src.length > col + halfWidth) src = src.substr(0, col + halfWidth - 1) + '…';
      col -= src.length - maxWidth;
      src = '…' + src.substr(1 - maxWidth);
    }
  }

var errLen = 1;
  var errEnd = '';

if (end) {
    if (end.line === start.line && col + (end.col - start.col) <= maxWidth + 1) {
      errLen = end.col - start.col;
    } else {
      errLen = Math.min(src.length + 1, maxWidth) - col;
      errEnd = '…';
    }
  }

var offset = col > 1 ? ' '.repeat(col - 1) : '';
  var err = '^'.repeat(errLen);
  return "".concat(src, "\n").concat(offset).concat(err).concat(errEnd);
}

var Range = /*#__PURE__*/function () {
  function Range(start, end) {
    _classCallCheck(this, Range);

this.start = start;
    this.end = end || start;
  }

_createClass(Range, [{
    key: "isEmpty",
    value: function isEmpty() {
      return typeof this.start !== 'number' || !this.end || this.end <= this.start;
    }
    /**
     * Set `origStart` and `origEnd` to point to the original source range for
     * this node, which may differ due to dropped CR characters.
     *
     * @param {number[]} cr - Positions of dropped CR characters
     * @param {number} offset - Starting index of `cr` from the last call
     * @returns {number} - The next offset, matching the one found for `origStart`
     */

}, {
    key: "setOrigRange",
    value: function setOrigRange(cr, offset) {
      var start = this.start,
          end = this.end;

if (cr.length === 0 || end <= cr[0]) {
        this.origStart = start;
        this.origEnd = end;
        return offset;
      }

var i = offset;

while (i < cr.length) {
        if (cr[i] > start) break;else ++i;
      }

this.origStart = start + i;
      var nextOffset = i;

while (i < cr.length) {
        // if end was at \n, it should now be at \r
        if (cr[i] >= end) break;else ++i;
      }

this.origEnd = end + i;
      return nextOffset;
    }
  }], [{
    key: "copy",
    value: function copy(orig) {
      return new Range(orig.start, orig.end);
    }
  }]);

return Range;
}();

/** Root class of all nodes */

var Node = /*#__PURE__*/function () {
  function Node(type, props, context) {
    _classCallCheck(this, Node);

Object.defineProperty(this, 'context', {
      value: context || null,
      writable: true
    });
    this.error = null;
    this.range = null;
    this.valueRange = null;
    this.props = props || [];
    this.type = type;
    this.value = null;
  }

_createClass(Node, [{
    key: "getPropValue",
    value: function getPropValue(idx, key, skipKey) {
      if (!this.context) return null;
      var src = this.context.src;
      var prop = this.props[idx];
      return prop && src[prop.start] === key ? src.slice(prop.start + (skipKey ? 1 : 0), prop.end) : null;
    }
  }, {
    key: "anchor",
    get: function get() {
      for (var i = 0; i < this.props.length; ++i) {
        var anchor = this.getPropValue(i, Char.ANCHOR, true);
        if (anchor != null) return anchor;
      }

return null;
    }
  }, {
    key: "comment",
    get: function get() {
      var comments = [];

for (var i = 0; i < this.props.length; ++i) {
        var comment = this.getPropValue(i, Char.COMMENT, true);
        if (comment != null) comments.push(comment);
      }

return comments.length > 0 ? comments.join('\n') : null;
    }
  }, {
    key: "commentHasRequiredWhitespace",
    value: function commentHasRequiredWhitespace(start) {
      var src = this.context.src;
      if (this.header && start === this.header.end) return false;
      if (!this.valueRange) return false;
      var end = this.valueRange.end;
      return start !== end || Node.atBlank(src, end - 1);
    }
  }, {
    key: "hasComment",
    get: function get() {
      if (this.context) {
        var src = this.context.src;

for (var i = 0; i < this.props.length; ++i) {
          if (src[this.props[i].start] === Char.COMMENT) return true;
        }
      }

return false;
    }
  }, {
    key: "hasProps",
    get: function get() {
      if (this.context) {
        var src = this.context.src;

for (var i = 0; i < this.props.length; ++i) {
          if (src[this.props[i].start] !== Char.COMMENT) return true;
        }
      }

return false;
    }
  }, {
    key: "includesTrailingLines",
    get: function get() {
      return false;
    }
  }, {
    key: "jsonLike",
    get: function get() {
      var jsonLikeTypes = [Type.FLOW_MAP, Type.FLOW_SEQ, Type.QUOTE_DOUBLE, Type.QUOTE_SINGLE];
      return jsonLikeTypes.indexOf(this.type) !== -1;
    }
  }, {
    key: "rangeAsLinePos",
    get: function get() {
      if (!this.range || !this.context) return undefined;
      var start = getLinePos(this.range.start, this.context.root);
      if (!start) return undefined;
      var end = getLinePos(this.range.end, this.context.root);
      return {
        start: start,
        end: end
      };
    }
  }, {
    key: "rawValue",
    get: function get() {
      if (!this.valueRange || !this.context) return null;
      var _this$valueRange = this.valueRange,
          start = _this$valueRange.start,
          end = _this$valueRange.end;
      return this.context.src.slice(start, end);
    }
  }, {
    key: "tag",
    get: function get() {
      for (var i = 0; i < this.props.length; ++i) {
        var tag = this.getPropValue(i, Char.TAG, false);

if (tag != null) {
          if (tag[1] === '<') {
            return {
              verbatim: tag.slice(2, -1)
            };
          } else {
            // eslint-disable-next-line no-unused-vars
            var _tag$match = tag.match(/^(.*!)([^!]*)$/),
                _tag$match2 = _slicedToArray(_tag$match, 3);
                _tag$match2[0];
                var handle = _tag$match2[1],
                suffix = _tag$match2[2];

return {
              handle: handle,
              suffix: suffix
            };
          }
        }
      }

return null;
    }
  }, {
    key: "valueRangeContainsNewline",
    get: function get() {
      if (!this.valueRange || !this.context) return false;
      var _this$valueRange2 = this.valueRange,
          start = _this$valueRange2.start,
          end = _this$valueRange2.end;
      var src = this.context.src;

for (var i = start; i < end; ++i) {
        if (src[i] === '\n') return true;
      }

return false;
    }
  }, {
    key: "parseComment",
    value: function parseComment(start) {
      var src = this.context.src;

if (src[start] === Char.COMMENT) {
        var end = Node.endOfLine(src, start + 1);
        var commentRange = new Range(start, end);
        this.props.push(commentRange);
        return end;
      }

return start;
    }
    /**
     * Populates the `origStart` and `origEnd` values of all ranges for this
     * node. Extended by child classes to handle descendant nodes.
     *
     * @param {number[]} cr - Positions of dropped CR characters
     * @param {number} offset - Starting index of `cr` from the last call
     * @returns {number} - The next offset, matching the one found for `origStart`
     */

}, {
    key: "setOrigRanges",
    value: function setOrigRanges(cr, offset) {
      if (this.range) offset = this.range.setOrigRange(cr, offset);
      if (this.valueRange) this.valueRange.setOrigRange(cr, offset);
      this.props.forEach(function (prop) {
        return prop.setOrigRange(cr, offset);
      });
      return offset;
    }
  }, {
    key: "toString",
    value: function toString() {
      var src = this.context.src,
          range = this.range,
          value = this.value;
      if (value != null) return value;
      var str = src.slice(range.start, range.end);
      return Node.addStringTerminator(src, range.end, str);
    }
  }], [{
    key: "addStringTerminator",
    value: function addStringTerminator(src, offset, str) {
      if (str[str.length - 1] === '\n') return str;
      var next = Node.endOfWhiteSpace(src, offset);
      return next >= src.length || src[next] === '\n' ? str + '\n' : str;
    } // ^(---|...)

}, {
    key: "atDocumentBoundary",
    value: function atDocumentBoundary(src, offset, sep) {
      var ch0 = src[offset];
      if (!ch0) return true;
      var prev = src[offset - 1];
      if (prev && prev !== '\n') return false;

if (sep) {
        if (ch0 !== sep) return false;
      } else {
        if (ch0 !== Char.DIRECTIVES_END && ch0 !== Char.DOCUMENT_END) return false;
      }

while (ch && notOk.indexOf(ch) === -1) {
        ch = src[offset += 1];
      }

if (isVerbatim && ch === '>') offset += 1;
      return offset;
    }
  }, {
    key: "endOfIndent",
    value: function endOfIndent(src, offset) {
      var ch = src[offset];

while (ch === ' ') {
        ch = src[offset += 1];
      }

return offset;
    }
  }, {
    key: "endOfLine",
    value: function endOfLine(src, offset) {
      var ch = src[offset];

while (ch && ch !== '\n') {
        ch = src[offset += 1];
      }

return offset;
    }
  }, {
    key: "endOfWhiteSpace",
    value: function endOfWhiteSpace(src, offset) {
      var ch = src[offset];

while (ch === '\t' || ch === ' ') {
        ch = src[offset += 1];
      }

return offset;
    }
  }, {
    key: "startOfLine",
    value: function startOfLine(src, offset) {
      var ch = src[offset - 1];
      if (ch === '\n') return offset;

while (ch && ch !== '\n') {
        ch = src[offset -= 1];
      }

return offset + 1;
    }
    /**
     * End of indentation, or null if the line's indent level is not more
     * than `indent`
     *
     * @param {string} src
     * @param {number} indent
     * @param {number} lineStart
     * @returns {?number}
     */

}, {
    key: "endOfBlockIndent",
    value: function endOfBlockIndent(src, indent, lineStart) {
      var inEnd = Node.endOfIndent(src, lineStart);

if (inEnd > lineStart + indent) {
        return inEnd;
      } else {
        var wsEnd = Node.endOfWhiteSpace(src, inEnd);
        var ch = src[wsEnd];
        if (!ch || ch === '\n') return wsEnd;
      }

return null;
    }
  }, {
    key: "atBlank",
    value: function atBlank(src, offset, endAsBlank) {
      var ch = src[offset];
      return ch === '\n' || ch === '\t' || ch === ' ' || endAsBlank && !ch;
    }
  }, {
    key: "nextNodeIsIndented",
    value: function nextNodeIsIndented(ch, indentDiff, indicatorAsIndent) {
      if (!ch || indentDiff < 0) return false;
      if (indentDiff > 0) return true;
      return indicatorAsIndent && ch === '-';
    } // should be at line or string end, or at next non-whitespace char

}, {
    key: "normalizeOffset",
    value: function normalizeOffset(src, offset) {
      var ch = src[offset];
      return !ch ? offset : ch !== '\n' && src[offset - 1] === '\n' ? offset - 1 : Node.endOfWhiteSpace(src, offset);
    } // fold single newline into space, multiple newlines to N - 1 newlines
    // presumes src[offset] === '\n'

}, {
    key: "foldNewline",
    value: function foldNewline(src, offset, indent) {
      var inCount = 0;
      var error = false;
      var fold = '';
      var ch = src[offset + 1];

while (ch === ' ' || ch === '\t' || ch === '\n') {
        switch (ch) {
          case '\n':
            inCount = 0;
            offset += 1;
            fold += '\n';
            break;

case '\t':
            if (inCount <= indent) error = true;
            offset = Node.endOfWhiteSpace(src, offset + 2) - 1;
            break;

case ' ':
            inCount += 1;
            offset += 1;
            break;
        }

ch = src[offset + 1];
      }

if (!fold) fold = ' ';
      if (ch && inCount <= indent) error = true;
      return {
        fold: fold,
        offset: offset,
        error: error
      };
    }
  }]);

return Node;
}();

var YAMLError = /*#__PURE__*/function (_Error) {
  _inherits(YAMLError, _Error);

var _super = _createSuper(YAMLError);

function YAMLError(name, source, message) {
    var _this;

_classCallCheck(this, YAMLError);

if (!message || !(source instanceof Node)) throw new Error("Invalid arguments for new ".concat(name));
    _this = _super.call(this);
    _this.name = name;
    _this.message = message;
    _this.source = source;
    return _this;
  }

_createClass(YAMLError, [{
    key: "makePretty",
    value: function makePretty() {
      if (!this.source) return;
      this.nodeType = this.source.type;
      var cst = this.source.context && this.source.context.root;

if (typeof this.offset === 'number') {
        this.range = new Range(this.offset, this.offset + 1);
        var start = cst && getLinePos(this.offset, cst);

if (start) {
          var end = {
            line: start.line,
            col: start.col + 1
          };
          this.linePos = {
            start: start,
            end: end
          };
        }

delete this.offset;
      } else {
        this.range = this.source.range;
        this.linePos = this.source.rangeAsLinePos;
      }

if (this.linePos) {
        var _this$linePos$start = this.linePos.start,
            line = _this$linePos$start.line,
            col = _this$linePos$start.col;
        this.message += " at line ".concat(line, ", column ").concat(col);
        var ctx = cst && getPrettyContext(this.linePos, cst);
        if (ctx) this.message += ":\n\n".concat(ctx, "\n");
      }

delete this.source;
    }
  }]);

return YAMLError;
}( /*#__PURE__*/_wrapNativeSuper(Error));
var YAMLReferenceError = /*#__PURE__*/function (_YAMLError) {
  _inherits(YAMLReferenceError, _YAMLError);

var _super2 = _createSuper(YAMLReferenceError);

function YAMLReferenceError(source, message) {
    _classCallCheck(this, YAMLReferenceError);

return _super2.call(this, 'YAMLReferenceError', source, message);
  }

return YAMLReferenceError;
}(YAMLError);
var YAMLSemanticError = /*#__PURE__*/function (_YAMLError2) {
  _inherits(YAMLSemanticError, _YAMLError2);

var _super3 = _createSuper(YAMLSemanticError);

function YAMLSemanticError(source, message) {
    _classCallCheck(this, YAMLSemanticError);

return _super3.call(this, 'YAMLSemanticError', source, message);
  }

return YAMLSemanticError;
}(YAMLError);
var YAMLSyntaxError = /*#__PURE__*/function (_YAMLError3) {
  _inherits(YAMLSyntaxError, _YAMLError3);

var _super4 = _createSuper(YAMLSyntaxError);

function YAMLSyntaxError(source, message) {
    _classCallCheck(this, YAMLSyntaxError);

return _super4.call(this, 'YAMLSyntaxError', source, message);
  }

return YAMLSyntaxError;
}(YAMLError);
var YAMLWarning = /*#__PURE__*/function (_YAMLError4) {
  _inherits(YAMLWarning, _YAMLError4);

var _super5 = _createSuper(YAMLWarning);

function YAMLWarning(source, message) {
    _classCallCheck(this, YAMLWarning);

return _super5.call(this, 'YAMLWarning', source, message);
  }

return YAMLWarning;
}(YAMLError);

var PlainValue = /*#__PURE__*/function (_Node) {
  _inherits(PlainValue, _Node);

var _super = _createSuper(PlainValue);

function PlainValue() {
    _classCallCheck(this, PlainValue);

return _super.apply(this, arguments);
  }

_createClass(PlainValue, [{
    key: "strValue",
    get: function get() {
      if (!this.valueRange || !this.context) return null;
      var _this$valueRange = this.valueRange,
          start = _this$valueRange.start,
          end = _this$valueRange.end;
      var src = this.context.src;
      var ch = src[end - 1];

while (start < end && (ch === '\n' || ch === '\t' || ch === ' ')) {
        ch = src[--end - 1];
      }

var str = '';

for (var i = start; i < end; ++i) {
        var _ch = src[i];

if (_ch === '\n') {
          var _Node$foldNewline = Node.foldNewline(src, i, -1),
              fold = _Node$foldNewline.fold,
              offset = _Node$foldNewline.offset;

str += fold;
          i = offset;
        } else if (_ch === ' ' || _ch === '\t') {
          // trim trailing whitespace
          var wsStart = i;
          var next = src[i + 1];

while (i < end && (next === ' ' || next === '\t')) {
            i += 1;
            next = src[i + 1];
          }

if (next !== '\n') str += i > wsStart ? src.slice(wsStart, i + 1) : _ch;
        } else {
          str += _ch;
        }
      }

var ch0 = src[start];

switch (ch0) {
        case '\t':
          {
            var msg = 'Plain value cannot start with a tab character';
            var errors = [new YAMLSemanticError(this, msg)];
            return {
              errors: errors,
              str: str
            };
          }

case '@':
        case '`':
          {
            var _msg = "Plain value cannot start with reserved character ".concat(ch0);

var _errors = [new YAMLSemanticError(this, _msg)];
            return {
              errors: _errors,
              str: str
            };
          }

default:
          return str;
      }
    }
  }, {
    key: "parseBlockValue",
    value: function parseBlockValue(start) {
      var _this$context = this.context,
          indent = _this$context.indent,
          inFlow = _this$context.inFlow,
          src = _this$context.src;
      var offset = start;
      var valueEnd = start;

for (var ch = src[offset]; ch === '\n'; ch = src[offset]) {
        if (Node.atDocumentBoundary(src, offset + 1)) break;
        var end = Node.endOfBlockIndent(src, indent, offset + 1);
        if (end === null || src[end] === '#') break;

if (src[end] === '\n') {
          offset = end;
        } else {
          valueEnd = PlainValue.endOfLine(src, end, inFlow);
          offset = valueEnd;
        }
      }

if (this.valueRange.isEmpty()) this.valueRange.start = start;
      this.valueRange.end = valueEnd;
      return valueEnd;
    }
    /**
     * Parses a plain value from the source
     *
     * Accepted forms are:
     * ```
     * #comment
     *
     * first line
     *
     * first line #comment
     *
     * first line
     * block
     * lines
     *
     * #comment
     * block
     * lines
     * ```
     * where block lines are empty or have an indent level greater than `indent`.
     *
     * @param {ParseContext} context
     * @param {number} start - Index of first character
     * @returns {number} - Index of the character after this scalar, may be `\n`
     */

}, {
    key: "parse",
    value: function parse(context, start) {
      this.context = context;
      var inFlow = context.inFlow,
          src = context.src;
      var offset = start;
      var ch = src[offset];

if (ch && ch !== '#' && ch !== '\n') {
        offset = PlainValue.endOfLine(src, start, inFlow);
      }

this.valueRange = new Range(start, offset);
      offset = Node.endOfWhiteSpace(src, offset);
      offset = this.parseComment(offset);

if (!this.hasComment || this.valueRange.isEmpty()) {
        offset = this.parseBlockValue(offset);
      }

return offset;
    }
  }], [{
    key: "endOfLine",
    value: function endOfLine(src, start, inFlow) {
      var ch = src[start];
      var offset = start;

while (ch && ch !== '\n') {
        if (inFlow && (ch === '[' || ch === ']' || ch === '{' || ch === '}' || ch === ',')) break;
        var next = src[offset + 1];
        if (ch === ':' && (!next || next === '\n' || next === '\t' || next === ' ' || inFlow && next === ',')) break;
        if ((ch === ' ' || ch === '\t') && next === '#') break;
        offset += 1;
        ch = next;
      }

return offset;
    }
  }]);

return PlainValue;
}(Node);

export { Char as C, Node as N, PlainValue as P, Range as R, Type as T, YAMLSyntaxError as Y, _createForOfIteratorHelper as _, _typeof as a, _createClass as b, _classCallCheck as c, defaultTagPrefix as d, _defineProperty as e, YAMLWarning as f, YAMLSemanticError as g, _slicedToArray as h, YAMLError as i, _inherits as j, _createSuper as k, _get as l, _getPrototypeOf as m, defaultTags as n, YAMLReferenceError as o, _assertThisInitialized as p, _toArray as q, _possibleConstructorReturn as r };

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