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_typeof(obj) { if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; }; } return _typeof(obj); }\n\n/**\n * Copyright (c) 2015-present, Facebook, Inc.\n *\n * This source code is licensed under the MIT license found in the\n * LICENSE file in the root directory of this source tree.\n *\n *  strict\n */\n\n/**\n * Used to print values in error messages.\n */\nexport default function inspect(value) {\n  return value && _typeof(value) === 'object' ? typeof value.inspect === 'function' ? value.inspect() : Array.isArray(value) ? '[' + value.map(inspect).join(', ') + ']' : '{' + Object.keys(value).map(function (k) {\n    return \"\".concat(k, \": \").concat(inspect(value[k]));\n  }).join(', ') + '}' : typeof value === 'string' ? '\"' + value + '\"' : typeof value === 'function' ? \"[function \".concat(value.name, \"]\") : String(value);\n}","/**\n * Copyright (c) 2015-present, Facebook, Inc.\n *\n * This source code is licensed under the MIT license found in the\n * LICENSE file in the root directory of this source tree.\n *\n *  strict\n */\nexport default function invariant(condition, message) {\n  /* istanbul ignore else */\n  if (!condition) {\n    throw new Error(message);\n  }\n}","/**\n * Copyright (c) 2015-present, Facebook, Inc.\n *\n * This source code is licensed under the MIT license found in the\n * LICENSE file in the root directory of this source tree.\n *\n *  strict\n */\n\n/**\n * The `applyToStringTag()` function checks first to see if the runtime\n * supports the `Symbol` class and then if the `Symbol.toStringTag` constant\n * is defined as a `Symbol` instance. If both conditions are met, the\n * Symbol.toStringTag property is defined as a getter that returns the\n * supplied class constructor's name.\n *\n * @method applyToStringTag\n *\n * @param {Class<any>} classObject a class such as Object, String, Number but\n * typically one of your own creation through the class keyword; `class A {}`,\n * for example.\n */\nexport default function applyToStringTag(classObject) {\n  if (typeof Symbol === 'function' && Symbol.toStringTag) {\n    Object.defineProperty(classObject.prototype, Symbol.toStringTag, {\n      get: function get() {\n        return this.constructor.name;\n      }\n    });\n  }\n}","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; }\n\n/**\n * Copyright (c) 2015-present, Facebook, Inc.\n *\n * This source code is licensed under the MIT license found in the\n * LICENSE file in the root directory of this source tree.\n *\n *  strict\n */\nimport invariant from '../jsutils/invariant';\nimport defineToStringTag from '../jsutils/defineToStringTag';\n\n/**\n * A representation of source input to GraphQL.\n * `name` and `locationOffset` are optional. They are useful for clients who\n * store GraphQL documents in source files; for example, if the GraphQL input\n * starts at line 40 in a file named Foo.graphql, it might be useful for name to\n * be \"Foo.graphql\" and location to be `{ line: 40, column: 0 }`.\n * line and column in locationOffset are 1-indexed\n */\nexport var Source = function Source(body, name, locationOffset) {\n  _defineProperty(this, \"body\", void 0);\n\n  _defineProperty(this, \"name\", void 0);\n\n  _defineProperty(this, \"locationOffset\", void 0);\n\n  this.body = body;\n  this.name = name || 'GraphQL request';\n  this.locationOffset = locationOffset || {\n    line: 1,\n    column: 1\n  };\n  !(this.locationOffset.line > 0) ? invariant(0, 'line in locationOffset is 1-indexed and must be positive') : void 0;\n  !(this.locationOffset.column > 0) ? invariant(0, 'column in locationOffset is 1-indexed and must be positive') : void 0;\n}; // Conditionally apply `[Symbol.toStringTag]` if `Symbol`s are supported\n\ndefineToStringTag(Source);","/**\n * Copyright (c) 2015-present, Facebook, Inc.\n *\n * This source code is licensed under the MIT license found in the\n * LICENSE file in the root directory of this source tree.\n *\n *  strict\n */\nimport { GraphQLError } from './GraphQLError';\n/**\n * Produces a GraphQLError representing a syntax error, containing useful\n * descriptive information about the syntax error's position in the source.\n */\n\nexport function syntaxError(source, position, description) {\n  return new GraphQLError(\"Syntax Error: \".concat(description), undefined, source, [position]);\n}","/**\n * Copyright (c) 2015-present, Facebook, Inc.\n *\n * This source code is licensed under the MIT license found in the\n * LICENSE file in the root directory of this source tree.\n *\n *  strict\n */\n\n/**\n * Produces the value of a block string from its parsed raw value, similar to\n * Coffeescript's block string, Python's docstring trim or Ruby's strip_heredoc.\n *\n * This implements the GraphQL spec's BlockStringValue() static algorithm.\n */\nexport default function blockStringValue(rawString) {\n  // Expand a block string's raw value into independent lines.\n  var lines = rawString.split(/\\r\\n|[\\n\\r]/g); // Remove common indentation from all lines but first.\n\n  var commonIndent = null;\n\n  for (var i = 1; i < lines.length; i++) {\n    var line = lines[i];\n    var indent = leadingWhitespace(line);\n\n    if (indent < line.length && (commonIndent === null || indent < commonIndent)) {\n      commonIndent = indent;\n\n      if (commonIndent === 0) {\n        break;\n      }\n    }\n  }\n\n  if (commonIndent) {\n    for (var _i = 1; _i < lines.length; _i++) {\n      lines[_i] = lines[_i].slice(commonIndent);\n    }\n  } // Remove leading and trailing blank lines.\n\n\n  while (lines.length > 0 && isBlank(lines[0])) {\n    lines.shift();\n  }\n\n  while (lines.length > 0 && isBlank(lines[lines.length - 1])) {\n    lines.pop();\n  } // Return a string of the lines joined with U+000A.\n\n\n  return lines.join('\\n');\n}\n\nfunction leadingWhitespace(str) {\n  var i = 0;\n\n  while (i < str.length && (str[i] === ' ' || str[i] === '\\t')) {\n    i++;\n  }\n\n  return i;\n}\n\nfunction isBlank(str) {\n  return leadingWhitespace(str) === str.length;\n}","/**\n * Copyright (c) 2015-present, Facebook, Inc.\n *\n * This source code is licensed under the MIT license found in the\n * LICENSE file in the root directory of this source tree.\n *\n *  strict\n */\nimport { syntaxError } from '../error';\nimport blockStringValue from './blockStringValue';\n/**\n * Given a Source object, this returns a Lexer for that source.\n * A Lexer is a stateful stream generator in that every time\n * it is advanced, it returns the next token in the Source. Assuming the\n * source lexes, the final Token emitted by the lexer will be of kind\n * EOF, after which the lexer will repeatedly return the same EOF token\n * whenever called.\n */\n\nexport function createLexer(source, options) {\n  var startOfFileToken = new Tok(TokenKind.SOF, 0, 0, 0, 0, null);\n  var lexer = {\n    source: source,\n    options: options,\n    lastToken: startOfFileToken,\n    token: startOfFileToken,\n    line: 1,\n    lineStart: 0,\n    advance: advanceLexer,\n    lookahead: lookahead\n  };\n  return lexer;\n}\n\nfunction advanceLexer() {\n  this.lastToken = this.token;\n  var token = this.token = this.lookahead();\n  return token;\n}\n\nfunction lookahead() {\n  var token = this.token;\n\n  if (token.kind !== TokenKind.EOF) {\n    do {\n      // Note: next is only mutable during parsing, so we cast to allow this.\n      token = token.next || (token.next = readToken(this, token));\n    } while (token.kind === TokenKind.COMMENT);\n  }\n\n  return token;\n}\n/**\n * The return type of createLexer.\n */\n\n\n/**\n * An exported enum describing the different kinds of tokens that the\n * lexer emits.\n */\nexport var TokenKind = Object.freeze({\n  SOF: '<SOF>',\n  EOF: '<EOF>',\n  BANG: '!',\n  DOLLAR: '$',\n  AMP: '&',\n  PAREN_L: '(',\n  PAREN_R: ')',\n  SPREAD: '...',\n  COLON: ':',\n  EQUALS: '=',\n  AT: '@',\n  BRACKET_L: '[',\n  BRACKET_R: ']',\n  BRACE_L: '{',\n  PIPE: '|',\n  BRACE_R: '}',\n  NAME: 'Name',\n  INT: 'Int',\n  FLOAT: 'Float',\n  STRING: 'String',\n  BLOCK_STRING: 'BlockString',\n  COMMENT: 'Comment'\n});\n/**\n * The enum type representing the token kinds values.\n */\n\n/**\n * A helper function to describe a token as a string for debugging\n */\nexport function getTokenDesc(token) {\n  var value = token.value;\n  return value ? \"\".concat(token.kind, \" \\\"\").concat(value, \"\\\"\") : token.kind;\n}\nvar charCodeAt = String.prototype.charCodeAt;\nvar slice = String.prototype.slice;\n/**\n * Helper function for constructing the Token object.\n */\n\nfunction Tok(kind, start, end, line, column, prev, value) {\n  this.kind = kind;\n  this.start = start;\n  this.end = end;\n  this.line = line;\n  this.column = column;\n  this.value = value;\n  this.prev = prev;\n  this.next = null;\n} // Print a simplified form when appearing in JSON/util.inspect.\n\n\nTok.prototype.toJSON = Tok.prototype.inspect = function toJSON() {\n  return {\n    kind: this.kind,\n    value: this.value,\n    line: this.line,\n    column: this.column\n  };\n};\n\nfunction printCharCode(code) {\n  return (// NaN/undefined represents access beyond the end of the file.\n    isNaN(code) ? TokenKind.EOF : // Trust JSON for ASCII.\n    code < 0x007f ? JSON.stringify(String.fromCharCode(code)) : // Otherwise print the escaped form.\n    \"\\\"\\\\u\".concat(('00' + code.toString(16).toUpperCase()).slice(-4), \"\\\"\")\n  );\n}\n/**\n * Gets the next token from the source starting at the given position.\n *\n * This skips over whitespace and comments until it finds the next lexable\n * token, then lexes punctuators immediately or calls the appropriate helper\n * function for more complicated tokens.\n */\n\n\nfunction readToken(lexer, prev) {\n  var source = lexer.source;\n  var body = source.body;\n  var bodyLength = body.length;\n  var pos = positionAfterWhitespace(body, prev.end, lexer);\n  var line = lexer.line;\n  var col = 1 + pos - lexer.lineStart;\n\n  if (pos >= bodyLength) {\n    return new Tok(TokenKind.EOF, bodyLength, bodyLength, line, col, prev);\n  }\n\n  var code = charCodeAt.call(body, pos); // SourceCharacter\n\n  switch (code) {\n    // !\n    case 33:\n      return new Tok(TokenKind.BANG, pos, pos + 1, line, col, prev);\n    // #\n\n    case 35:\n      return readComment(source, pos, line, col, prev);\n    // $\n\n    case 36:\n      return new Tok(TokenKind.DOLLAR, pos, pos + 1, line, col, prev);\n    // &\n\n    case 38:\n      return new Tok(TokenKind.AMP, pos, pos + 1, line, col, prev);\n    // (\n\n    case 40:\n      return new Tok(TokenKind.PAREN_L, pos, pos + 1, line, col, prev);\n    // )\n\n    case 41:\n      return new Tok(TokenKind.PAREN_R, pos, pos + 1, line, col, prev);\n    // .\n\n    case 46:\n      if (charCodeAt.call(body, pos + 1) === 46 && charCodeAt.call(body, pos + 2) === 46) {\n        return new Tok(TokenKind.SPREAD, pos, pos + 3, line, col, prev);\n      }\n\n      break;\n    // :\n\n    case 58:\n      return new Tok(TokenKind.COLON, pos, pos + 1, line, col, prev);\n    // =\n\n    case 61:\n      return new Tok(TokenKind.EQUALS, pos, pos + 1, line, col, prev);\n    // @\n\n    case 64:\n      return new Tok(TokenKind.AT, pos, pos + 1, line, col, prev);\n    // [\n\n    case 91:\n      return new Tok(TokenKind.BRACKET_L, pos, pos + 1, line, col, prev);\n    // ]\n\n    case 93:\n      return new Tok(TokenKind.BRACKET_R, pos, pos + 1, line, col, prev);\n    // {\n\n    case 123:\n      return new Tok(TokenKind.BRACE_L, pos, pos + 1, line, col, prev);\n    // |\n\n    case 124:\n      return new Tok(TokenKind.PIPE, pos, pos + 1, line, col, prev);\n    // }\n\n    case 125:\n      return new Tok(TokenKind.BRACE_R, pos, pos + 1, line, col, prev);\n    // A-Z _ a-z\n\n    case 65:\n    case 66:\n    case 67:\n    case 68:\n    case 69:\n    case 70:\n    case 71:\n    case 72:\n    case 73:\n    case 74:\n    case 75:\n    case 76:\n    case 77:\n    case 78:\n    case 79:\n    case 80:\n    case 81:\n    case 82:\n    case 83:\n    case 84:\n    case 85:\n    case 86:\n    case 87:\n    case 88:\n    case 89:\n    case 90:\n    case 95:\n    case 97:\n    case 98:\n    case 99:\n    case 100:\n    case 101:\n    case 102:\n    case 103:\n    case 104:\n    case 105:\n    case 106:\n    case 107:\n    case 108:\n    case 109:\n    case 110:\n    case 111:\n    case 112:\n    case 113:\n    case 114:\n    case 115:\n    case 116:\n    case 117:\n    case 118:\n    case 119:\n    case 120:\n    case 121:\n    case 122:\n      return readName(source, pos, line, col, prev);\n    // - 0-9\n\n    case 45:\n    case 48:\n    case 49:\n    case 50:\n    case 51:\n    case 52:\n    case 53:\n    case 54:\n    case 55:\n    case 56:\n    case 57:\n      return readNumber(source, pos, code, line, col, prev);\n    // \"\n\n    case 34:\n      if (charCodeAt.call(body, pos + 1) === 34 && charCodeAt.call(body, pos + 2) === 34) {\n        return readBlockString(source, pos, line, col, prev);\n      }\n\n      return readString(source, pos, line, col, prev);\n  }\n\n  throw syntaxError(source, pos, unexpectedCharacterMessage(code));\n}\n/**\n * Report a message that an unexpected character was encountered.\n */\n\n\nfunction unexpectedCharacterMessage(code) {\n  if (code < 0x0020 && code !== 0x0009 && code !== 0x000a && code !== 0x000d) {\n    return \"Cannot contain the invalid character \".concat(printCharCode(code), \".\");\n  }\n\n  if (code === 39) {\n    // '\n    return \"Unexpected single quote character ('), did you mean to use \" + 'a double quote (\")?';\n  }\n\n  return \"Cannot parse the unexpected character \".concat(printCharCode(code), \".\");\n}\n/**\n * Reads from body starting at startPosition until it finds a non-whitespace\n * or commented character, then returns the position of that character for\n * lexing.\n */\n\n\nfunction positionAfterWhitespace(body, startPosition, lexer) {\n  var bodyLength = body.length;\n  var position = startPosition;\n\n  while (position < bodyLength) {\n    var code = charCodeAt.call(body, position); // tab | space | comma | BOM\n\n    if (code === 9 || code === 32 || code === 44 || code === 0xfeff) {\n      ++position;\n    } else if (code === 10) {\n      // new line\n      ++position;\n      ++lexer.line;\n      lexer.lineStart = position;\n    } else if (code === 13) {\n      // carriage return\n      if (charCodeAt.call(body, position + 1) === 10) {\n        position += 2;\n      } else {\n        ++position;\n      }\n\n      ++lexer.line;\n      lexer.lineStart = position;\n    } else {\n      break;\n    }\n  }\n\n  return position;\n}\n/**\n * Reads a comment token from the source file.\n *\n * #[\\u0009\\u0020-\\uFFFF]*\n */\n\n\nfunction readComment(source, start, line, col, prev) {\n  var body = source.body;\n  var code;\n  var position = start;\n\n  do {\n    code = charCodeAt.call(body, ++position);\n  } while (code !== null && ( // SourceCharacter but not LineTerminator\n  code > 0x001f || code === 0x0009));\n\n  return new Tok(TokenKind.COMMENT, start, position, line, col, prev, slice.call(body, start + 1, position));\n}\n/**\n * Reads a number token from the source file, either a float\n * or an int depending on whether a decimal point appears.\n *\n * Int:   -?(0|[1-9][0-9]*)\n * Float: -?(0|[1-9][0-9]*)(\\.[0-9]+)?((E|e)(+|-)?[0-9]+)?\n */\n\n\nfunction readNumber(source, start, firstCode, line, col, prev) {\n  var body = source.body;\n  var code = firstCode;\n  var position = start;\n  var isFloat = false;\n\n  if (code === 45) {\n    // -\n    code = charCodeAt.call(body, ++position);\n  }\n\n  if (code === 48) {\n    // 0\n    code = charCodeAt.call(body, ++position);\n\n    if (code >= 48 && code <= 57) {\n      throw syntaxError(source, position, \"Invalid number, unexpected digit after 0: \".concat(printCharCode(code), \".\"));\n    }\n  } else {\n    position = readDigits(source, position, code);\n    code = charCodeAt.call(body, position);\n  }\n\n  if (code === 46) {\n    // .\n    isFloat = true;\n    code = charCodeAt.call(body, ++position);\n    position = readDigits(source, position, code);\n    code = charCodeAt.call(body, position);\n  }\n\n  if (code === 69 || code === 101) {\n    // E e\n    isFloat = true;\n    code = charCodeAt.call(body, ++position);\n\n    if (code === 43 || code === 45) {\n      // + -\n      code = charCodeAt.call(body, ++position);\n    }\n\n    position = readDigits(source, position, code);\n  }\n\n  return new Tok(isFloat ? TokenKind.FLOAT : TokenKind.INT, start, position, line, col, prev, slice.call(body, start, position));\n}\n/**\n * Returns the new position in the source after reading digits.\n */\n\n\nfunction readDigits(source, start, firstCode) {\n  var body = source.body;\n  var position = start;\n  var code = firstCode;\n\n  if (code >= 48 && code <= 57) {\n    // 0 - 9\n    do {\n      code = charCodeAt.call(body, ++position);\n    } while (code >= 48 && code <= 57); // 0 - 9\n\n\n    return position;\n  }\n\n  throw syntaxError(source, position, \"Invalid number, expected digit but got: \".concat(printCharCode(code), \".\"));\n}\n/**\n * Reads a string token from the source file.\n *\n * \"([^\"\\\\\\u000A\\u000D]|(\\\\(u[0-9a-fA-F]{4}|[\"\\\\/bfnrt])))*\"\n */\n\n\nfunction readString(source, start, line, col, prev) {\n  var body = source.body;\n  var position = start + 1;\n  var chunkStart = position;\n  var code = 0;\n  var value = '';\n\n  while (position < body.length && (code = charCodeAt.call(body, position)) !== null && // not LineTerminator\n  code !== 0x000a && code !== 0x000d) {\n    // Closing Quote (\")\n    if (code === 34) {\n      value += slice.call(body, chunkStart, position);\n      return new Tok(TokenKind.STRING, start, position + 1, line, col, prev, value);\n    } // SourceCharacter\n\n\n    if (code < 0x0020 && code !== 0x0009) {\n      throw syntaxError(source, position, \"Invalid character within String: \".concat(printCharCode(code), \".\"));\n    }\n\n    ++position;\n\n    if (code === 92) {\n      // \\\n      value += slice.call(body, chunkStart, position - 1);\n      code = charCodeAt.call(body, position);\n\n      switch (code) {\n        case 34:\n          value += '\"';\n          break;\n\n        case 47:\n          value += '/';\n          break;\n\n        case 92:\n          value += '\\\\';\n          break;\n\n        case 98:\n          value += '\\b';\n          break;\n\n        case 102:\n          value += '\\f';\n          break;\n\n        case 110:\n          value += '\\n';\n          break;\n\n        case 114:\n          value += '\\r';\n          break;\n\n        case 116:\n          value += '\\t';\n          break;\n\n        case 117:\n          // u\n          var charCode = uniCharCode(charCodeAt.call(body, position + 1), charCodeAt.call(body, position + 2), charCodeAt.call(body, position + 3), charCodeAt.call(body, position + 4));\n\n          if (charCode < 0) {\n            throw syntaxError(source, position, 'Invalid character escape sequence: ' + \"\\\\u\".concat(body.slice(position + 1, position + 5), \".\"));\n          }\n\n          value += String.fromCharCode(charCode);\n          position += 4;\n          break;\n\n        default:\n          throw syntaxError(source, position, \"Invalid character escape sequence: \\\\\".concat(String.fromCharCode(code), \".\"));\n      }\n\n      ++position;\n      chunkStart = position;\n    }\n  }\n\n  throw syntaxError(source, position, 'Unterminated string.');\n}\n/**\n * Reads a block string token from the source file.\n *\n * \"\"\"(\"?\"?(\\\\\"\"\"|\\\\(?!=\"\"\")|[^\"\\\\]))*\"\"\"\n */\n\n\nfunction readBlockString(source, start, line, col, prev) {\n  var body = source.body;\n  var position = start + 3;\n  var chunkStart = position;\n  var code = 0;\n  var rawValue = '';\n\n  while (position < body.length && (code = charCodeAt.call(body, position)) !== null) {\n    // Closing Triple-Quote (\"\"\")\n    if (code === 34 && charCodeAt.call(body, position + 1) === 34 && charCodeAt.call(body, position + 2) === 34) {\n      rawValue += slice.call(body, chunkStart, position);\n      return new Tok(TokenKind.BLOCK_STRING, start, position + 3, line, col, prev, blockStringValue(rawValue));\n    } // SourceCharacter\n\n\n    if (code < 0x0020 && code !== 0x0009 && code !== 0x000a && code !== 0x000d) {\n      throw syntaxError(source, position, \"Invalid character within String: \".concat(printCharCode(code), \".\"));\n    } // Escape Triple-Quote (\\\"\"\")\n\n\n    if (code === 92 && charCodeAt.call(body, position + 1) === 34 && charCodeAt.call(body, position + 2) === 34 && charCodeAt.call(body, position + 3) === 34) {\n      rawValue += slice.call(body, chunkStart, position) + '\"\"\"';\n      position += 4;\n      chunkStart = position;\n    } else {\n      ++position;\n    }\n  }\n\n  throw syntaxError(source, position, 'Unterminated string.');\n}\n/**\n * Converts four hexidecimal chars to the integer that the\n * string represents. For example, uniCharCode('0','0','0','f')\n * will return 15, and uniCharCode('0','0','f','f') returns 255.\n *\n * Returns a negative number on error, if a char was invalid.\n *\n * This is implemented by noting that char2hex() returns -1 on error,\n * which means the result of ORing the char2hex() will also be negative.\n */\n\n\nfunction uniCharCode(a, b, c, d) {\n  return char2hex(a) << 12 | char2hex(b) << 8 | char2hex(c) << 4 | char2hex(d);\n}\n/**\n * Converts a hex character to its integer value.\n * '0' becomes 0, '9' becomes 9\n * 'A' becomes 10, 'F' becomes 15\n * 'a' becomes 10, 'f' becomes 15\n *\n * Returns -1 on error.\n */\n\n\nfunction char2hex(a) {\n  return a >= 48 && a <= 57 ? a - 48 // 0-9\n  : a >= 65 && a <= 70 ? a - 55 // A-F\n  : a >= 97 && a <= 102 ? a - 87 // a-f\n  : -1;\n}\n/**\n * Reads an alphanumeric + underscore name from the source.\n *\n * [_A-Za-z][_0-9A-Za-z]*\n */\n\n\nfunction readName(source, start, line, col, prev) {\n  var body = source.body;\n  var bodyLength = body.length;\n  var position = start + 1;\n  var code = 0;\n\n  while (position !== bodyLength && (code = charCodeAt.call(body, position)) !== null && (code === 95 || // _\n  code >= 48 && code <= 57 || // 0-9\n  code >= 65 && code <= 90 || // A-Z\n  code >= 97 && code <= 122) // a-z\n  ) {\n    ++position;\n  }\n\n  return new Tok(TokenKind.NAME, start, position, line, col, prev, slice.call(body, start, position));\n}","/**\n * Copyright (c) 2015-present, Facebook, Inc.\n *\n * This source code is licensed under the MIT license found in the\n * LICENSE file in the root directory of this source tree.\n *\n *  strict\n */\n\n/**\n * The set of allowed kind values for AST nodes.\n */\nexport var Kind = Object.freeze({\n  // Name\n  NAME: 'Name',\n  // Document\n  DOCUMENT: 'Document',\n  OPERATION_DEFINITION: 'OperationDefinition',\n  VARIABLE_DEFINITION: 'VariableDefinition',\n  SELECTION_SET: 'SelectionSet',\n  FIELD: 'Field',\n  ARGUMENT: 'Argument',\n  // Fragments\n  FRAGMENT_SPREAD: 'FragmentSpread',\n  INLINE_FRAGMENT: 'InlineFragment',\n  FRAGMENT_DEFINITION: 'FragmentDefinition',\n  // Values\n  VARIABLE: 'Variable',\n  INT: 'IntValue',\n  FLOAT: 'FloatValue',\n  STRING: 'StringValue',\n  BOOLEAN: 'BooleanValue',\n  NULL: 'NullValue',\n  ENUM: 'EnumValue',\n  LIST: 'ListValue',\n  OBJECT: 'ObjectValue',\n  OBJECT_FIELD: 'ObjectField',\n  // Directives\n  DIRECTIVE: 'Directive',\n  // Types\n  NAMED_TYPE: 'NamedType',\n  LIST_TYPE: 'ListType',\n  NON_NULL_TYPE: 'NonNullType',\n  // Type System Definitions\n  SCHEMA_DEFINITION: 'SchemaDefinition',\n  OPERATION_TYPE_DEFINITION: 'OperationTypeDefinition',\n  // Type Definitions\n  SCALAR_TYPE_DEFINITION: 'ScalarTypeDefinition',\n  OBJECT_TYPE_DEFINITION: 'ObjectTypeDefinition',\n  FIELD_DEFINITION: 'FieldDefinition',\n  INPUT_VALUE_DEFINITION: 'InputValueDefinition',\n  INTERFACE_TYPE_DEFINITION: 'InterfaceTypeDefinition',\n  UNION_TYPE_DEFINITION: 'UnionTypeDefinition',\n  ENUM_TYPE_DEFINITION: 'EnumTypeDefinition',\n  ENUM_VALUE_DEFINITION: 'EnumValueDefinition',\n  INPUT_OBJECT_TYPE_DEFINITION: 'InputObjectTypeDefinition',\n  // Directive Definitions\n  DIRECTIVE_DEFINITION: 'DirectiveDefinition',\n  // Type System Extensions\n  SCHEMA_EXTENSION: 'SchemaExtension',\n  // Type Extensions\n  SCALAR_TYPE_EXTENSION: 'ScalarTypeExtension',\n  OBJECT_TYPE_EXTENSION: 'ObjectTypeExtension',\n  INTERFACE_TYPE_EXTENSION: 'InterfaceTypeExtension',\n  UNION_TYPE_EXTENSION: 'UnionTypeExtension',\n  ENUM_TYPE_EXTENSION: 'EnumTypeExtension',\n  INPUT_OBJECT_TYPE_EXTENSION: 'InputObjectTypeExtension'\n});\n/**\n * The enum type representing the possible kind values of AST nodes.\n */","/**\n * Copyright (c) 2015-present, Facebook, Inc.\n *\n * This source code is licensed under the MIT license found in the\n * LICENSE file in the root directory of this source tree.\n *\n *  strict\n */\n\n/**\n * The set of allowed directive location values.\n */\nexport var DirectiveLocation = Object.freeze({\n  // Request Definitions\n  QUERY: 'QUERY',\n  MUTATION: 'MUTATION',\n  SUBSCRIPTION: 'SUBSCRIPTION',\n  FIELD: 'FIELD',\n  FRAGMENT_DEFINITION: 'FRAGMENT_DEFINITION',\n  FRAGMENT_SPREAD: 'FRAGMENT_SPREAD',\n  INLINE_FRAGMENT: 'INLINE_FRAGMENT',\n  VARIABLE_DEFINITION: 'VARIABLE_DEFINITION',\n  // Type System Definitions\n  SCHEMA: 'SCHEMA',\n  SCALAR: 'SCALAR',\n  OBJECT: 'OBJECT',\n  FIELD_DEFINITION: 'FIELD_DEFINITION',\n  ARGUMENT_DEFINITION: 'ARGUMENT_DEFINITION',\n  INTERFACE: 'INTERFACE',\n  UNION: 'UNION',\n  ENUM: 'ENUM',\n  ENUM_VALUE: 'ENUM_VALUE',\n  INPUT_OBJECT: 'INPUT_OBJECT',\n  INPUT_FIELD_DEFINITION: 'INPUT_FIELD_DEFINITION'\n});\n/**\n * The enum type representing the directive location values.\n */","/**\n * Copyright (c) 2015-present, Facebook, Inc.\n *\n * This source code is licensed under the MIT license found in the\n * LICENSE file in the root directory of this source tree.\n *\n *  strict\n */\nimport inspect from '../jsutils/inspect';\nimport { Source } from './source';\nimport { syntaxError } from '../error';\nimport { createLexer, TokenKind, getTokenDesc } from './lexer';\nimport { Kind } from './kinds';\nimport { DirectiveLocation } from './directiveLocation';\n/**\n * Configuration options to control parser behavior\n */\n\n/**\n * Given a GraphQL source, parses it into a Document.\n * Throws GraphQLError if a syntax error is encountered.\n */\nexport function parse(source, options) {\n  var sourceObj = typeof source === 'string' ? new Source(source) : source;\n\n  if (!(sourceObj instanceof Source)) {\n    throw new TypeError(\"Must provide Source. Received: \".concat(inspect(sourceObj)));\n  }\n\n  var lexer = createLexer(sourceObj, options || {});\n  return parseDocument(lexer);\n}\n/**\n * Given a string containing a GraphQL value (ex. `[42]`), parse the AST for\n * that value.\n * Throws GraphQLError if a syntax error is encountered.\n *\n * This is useful within tools that operate upon GraphQL Values directly and\n * in isolation of complete GraphQL documents.\n *\n * Consider providing the results to the utility function: valueFromAST().\n */\n\nexport function parseValue(source, options) {\n  var sourceObj = typeof source === 'string' ? new Source(source) : source;\n  var lexer = createLexer(sourceObj, options || {});\n  expect(lexer, TokenKind.SOF);\n  var value = parseValueLiteral(lexer, false);\n  expect(lexer, TokenKind.EOF);\n  return value;\n}\n/**\n * Given a string containing a GraphQL Type (ex. `[Int!]`), parse the AST for\n * that type.\n * Throws GraphQLError if a syntax error is encountered.\n *\n * This is useful within tools that operate upon GraphQL Types directly and\n * in isolation of complete GraphQL documents.\n *\n * Consider providing the results to the utility function: typeFromAST().\n */\n\nexport function parseType(source, options) {\n  var sourceObj = typeof source === 'string' ? new Source(source) : source;\n  var lexer = createLexer(sourceObj, options || {});\n  expect(lexer, TokenKind.SOF);\n  var type = parseTypeReference(lexer);\n  expect(lexer, TokenKind.EOF);\n  return type;\n}\n/**\n * Converts a name lex token into a name parse node.\n */\n\nfunction parseName(lexer) {\n  var token = expect(lexer, TokenKind.NAME);\n  return {\n    kind: Kind.NAME,\n    value: token.value,\n    loc: loc(lexer, token)\n  };\n} // Implements the parsing rules in the Document section.\n\n/**\n * Document : Definition+\n */\n\n\nfunction parseDocument(lexer) {\n  var start = lexer.token;\n  return {\n    kind: Kind.DOCUMENT,\n    definitions: many(lexer, TokenKind.SOF, parseDefinition, TokenKind.EOF),\n    loc: loc(lexer, start)\n  };\n}\n/**\n * Definition :\n *   - ExecutableDefinition\n *   - TypeSystemDefinition\n *   - TypeSystemExtension\n */\n\n\nfunction parseDefinition(lexer) {\n  if (peek(lexer, TokenKind.NAME)) {\n    switch (lexer.token.value) {\n      case 'query':\n      case 'mutation':\n      case 'subscription':\n      case 'fragment':\n        return parseExecutableDefinition(lexer);\n\n      case 'schema':\n      case 'scalar':\n      case 'type':\n      case 'interface':\n      case 'union':\n      case 'enum':\n      case 'input':\n      case 'directive':\n        return parseTypeSystemDefinition(lexer);\n\n      case 'extend':\n        return parseTypeSystemExtension(lexer);\n    }\n  } else if (peek(lexer, TokenKind.BRACE_L)) {\n    return parseExecutableDefinition(lexer);\n  } else if (peekDescription(lexer)) {\n    return parseTypeSystemDefinition(lexer);\n  }\n\n  throw unexpected(lexer);\n}\n/**\n * ExecutableDefinition :\n *   - OperationDefinition\n *   - FragmentDefinition\n */\n\n\nfunction parseExecutableDefinition(lexer) {\n  if (peek(lexer, TokenKind.NAME)) {\n    switch (lexer.token.value) {\n      case 'query':\n      case 'mutation':\n      case 'subscription':\n        return parseOperationDefinition(lexer);\n\n      case 'fragment':\n        return parseFragmentDefinition(lexer);\n    }\n  } else if (peek(lexer, TokenKind.BRACE_L)) {\n    return parseOperationDefinition(lexer);\n  }\n\n  throw unexpected(lexer);\n} // Implements the parsing rules in the Operations section.\n\n/**\n * OperationDefinition :\n *  - SelectionSet\n *  - OperationType Name? VariableDefinitions? Directives? SelectionSet\n */\n\n\nfunction parseOperationDefinition(lexer) {\n  var start = lexer.token;\n\n  if (peek(lexer, TokenKind.BRACE_L)) {\n    return {\n      kind: Kind.OPERATION_DEFINITION,\n      operation: 'query',\n      name: undefined,\n      variableDefinitions: [],\n      directives: [],\n      selectionSet: parseSelectionSet(lexer),\n      loc: loc(lexer, start)\n    };\n  }\n\n  var operation = parseOperationType(lexer);\n  var name;\n\n  if (peek(lexer, TokenKind.NAME)) {\n    name = parseName(lexer);\n  }\n\n  return {\n    kind: Kind.OPERATION_DEFINITION,\n    operation: operation,\n    name: name,\n    variableDefinitions: parseVariableDefinitions(lexer),\n    directives: parseDirectives(lexer, false),\n    selectionSet: parseSelectionSet(lexer),\n    loc: loc(lexer, start)\n  };\n}\n/**\n * OperationType : one of query mutation subscription\n */\n\n\nfunction parseOperationType(lexer) {\n  var operationToken = expect(lexer, TokenKind.NAME);\n\n  switch (operationToken.value) {\n    case 'query':\n      return 'query';\n\n    case 'mutation':\n      return 'mutation';\n\n    case 'subscription':\n      return 'subscription';\n  }\n\n  throw unexpected(lexer, operationToken);\n}\n/**\n * VariableDefinitions : ( VariableDefinition+ )\n */\n\n\nfunction parseVariableDefinitions(lexer) {\n  return peek(lexer, TokenKind.PAREN_L) ? many(lexer, TokenKind.PAREN_L, parseVariableDefinition, TokenKind.PAREN_R) : [];\n}\n/**\n * VariableDefinition : Variable : Type DefaultValue? Directives[Const]?\n */\n\n\nfunction parseVariableDefinition(lexer) {\n  var start = lexer.token;\n\n  if (lexer.options.experimentalVariableDefinitionDirectives) {\n    return {\n      kind: Kind.VARIABLE_DEFINITION,\n      variable: parseVariable(lexer),\n      type: (expect(lexer, TokenKind.COLON), parseTypeReference(lexer)),\n      defaultValue: skip(lexer, TokenKind.EQUALS) ? parseValueLiteral(lexer, true) : undefined,\n      directives: parseDirectives(lexer, true),\n      loc: loc(lexer, start)\n    };\n  }\n\n  return {\n    kind: Kind.VARIABLE_DEFINITION,\n    variable: parseVariable(lexer),\n    type: (expect(lexer, TokenKind.COLON), parseTypeReference(lexer)),\n    defaultValue: skip(lexer, TokenKind.EQUALS) ? parseValueLiteral(lexer, true) : undefined,\n    loc: loc(lexer, start)\n  };\n}\n/**\n * Variable : $ Name\n */\n\n\nfunction parseVariable(lexer) {\n  var start = lexer.token;\n  expect(lexer, TokenKind.DOLLAR);\n  return {\n    kind: Kind.VARIABLE,\n    name: parseName(lexer),\n    loc: loc(lexer, start)\n  };\n}\n/**\n * SelectionSet : { Selection+ }\n */\n\n\nfunction parseSelectionSet(lexer) {\n  var start = lexer.token;\n  return {\n    kind: Kind.SELECTION_SET,\n    selections: many(lexer, TokenKind.BRACE_L, parseSelection, TokenKind.BRACE_R),\n    loc: loc(lexer, start)\n  };\n}\n/**\n * Selection :\n *   - Field\n *   - FragmentSpread\n *   - InlineFragment\n */\n\n\nfunction parseSelection(lexer) {\n  return peek(lexer, TokenKind.SPREAD) ? parseFragment(lexer) : parseField(lexer);\n}\n/**\n * Field : Alias? Name Arguments? Directives? SelectionSet?\n *\n * Alias : Name :\n */\n\n\nfunction parseField(lexer) {\n  var start = lexer.token;\n  var nameOrAlias = parseName(lexer);\n  var alias;\n  var name;\n\n  if (skip(lexer, TokenKind.COLON)) {\n    alias = nameOrAlias;\n    name = parseName(lexer);\n  } else {\n    name = nameOrAlias;\n  }\n\n  return {\n    kind: Kind.FIELD,\n    alias: alias,\n    name: name,\n    arguments: parseArguments(lexer, false),\n    directives: parseDirectives(lexer, false),\n    selectionSet: peek(lexer, TokenKind.BRACE_L) ? parseSelectionSet(lexer) : undefined,\n    loc: loc(lexer, start)\n  };\n}\n/**\n * Arguments[Const] : ( Argument[?Const]+ )\n */\n\n\nfunction parseArguments(lexer, isConst) {\n  var item = isConst ? parseConstArgument : parseArgument;\n  return peek(lexer, TokenKind.PAREN_L) ? many(lexer, TokenKind.PAREN_L, item, TokenKind.PAREN_R) : [];\n}\n/**\n * Argument[Const] : Name : Value[?Const]\n */\n\n\nfunction parseArgument(lexer) {\n  var start = lexer.token;\n  return {\n    kind: Kind.ARGUMENT,\n    name: parseName(lexer),\n    value: (expect(lexer, TokenKind.COLON), parseValueLiteral(lexer, false)),\n    loc: loc(lexer, start)\n  };\n}\n\nfunction parseConstArgument(lexer) {\n  var start = lexer.token;\n  return {\n    kind: Kind.ARGUMENT,\n    name: parseName(lexer),\n    value: (expect(lexer, TokenKind.COLON), parseConstValue(lexer)),\n    loc: loc(lexer, start)\n  };\n} // Implements the parsing rules in the Fragments section.\n\n/**\n * Corresponds to both FragmentSpread and InlineFragment in the spec.\n *\n * FragmentSpread : ... FragmentName Directives?\n *\n * InlineFragment : ... TypeCondition? Directives? SelectionSet\n */\n\n\nfunction parseFragment(lexer) {\n  var start = lexer.token;\n  expect(lexer, TokenKind.SPREAD);\n\n  if (peek(lexer, TokenKind.NAME) && lexer.token.value !== 'on') {\n    return {\n      kind: Kind.FRAGMENT_SPREAD,\n      name: parseFragmentName(lexer),\n      directives: parseDirectives(lexer, false),\n      loc: loc(lexer, start)\n    };\n  }\n\n  var typeCondition;\n\n  if (lexer.token.value === 'on') {\n    lexer.advance();\n    typeCondition = parseNamedType(lexer);\n  }\n\n  return {\n    kind: Kind.INLINE_FRAGMENT,\n    typeCondition: typeCondition,\n    directives: parseDirectives(lexer, false),\n    selectionSet: parseSelectionSet(lexer),\n    loc: loc(lexer, start)\n  };\n}\n/**\n * FragmentDefinition :\n *   - fragment FragmentName on TypeCondition Directives? SelectionSet\n *\n * TypeCondition : NamedType\n */\n\n\nfunction parseFragmentDefinition(lexer) {\n  var start = lexer.token;\n  expectKeyword(lexer, 'fragment'); // Experimental support for defining variables within fragments changes\n  // the grammar of FragmentDefinition:\n  //   - fragment FragmentName VariableDefinitions? on TypeCondition Directives? SelectionSet\n\n  if (lexer.options.experimentalFragmentVariables) {\n    return {\n      kind: Kind.FRAGMENT_DEFINITION,\n      name: parseFragmentName(lexer),\n      variableDefinitions: parseVariableDefinitions(lexer),\n      typeCondition: (expectKeyword(lexer, 'on'), parseNamedType(lexer)),\n      directives: parseDirectives(lexer, false),\n      selectionSet: parseSelectionSet(lexer),\n      loc: loc(lexer, start)\n    };\n  }\n\n  return {\n    kind: Kind.FRAGMENT_DEFINITION,\n    name: parseFragmentName(lexer),\n    typeCondition: (expectKeyword(lexer, 'on'), parseNamedType(lexer)),\n    directives: parseDirectives(lexer, false),\n    selectionSet: parseSelectionSet(lexer),\n    loc: loc(lexer, start)\n  };\n}\n/**\n * FragmentName : Name but not `on`\n */\n\n\nfunction parseFragmentName(lexer) {\n  if (lexer.token.value === 'on') {\n    throw unexpected(lexer);\n  }\n\n  return parseName(lexer);\n} // Implements the parsing rules in the Values section.\n\n/**\n * Value[Const] :\n *   - [~Const] Variable\n *   - IntValue\n *   - FloatValue\n *   - StringValue\n *   - BooleanValue\n *   - NullValue\n *   - EnumValue\n *   - ListValue[?Const]\n *   - ObjectValue[?Const]\n *\n * BooleanValue : one of `true` `false`\n *\n * NullValue : `null`\n *\n * EnumValue : Name but not `true`, `false` or `null`\n */\n\n\nfunction parseValueLiteral(lexer, isConst) {\n  var token = lexer.token;\n\n  switch (token.kind) {\n    case TokenKind.BRACKET_L:\n      return parseList(lexer, isConst);\n\n    case TokenKind.BRACE_L:\n      return parseObject(lexer, isConst);\n\n    case TokenKind.INT:\n      lexer.advance();\n      return {\n        kind: Kind.INT,\n        value: token.value,\n        loc: loc(lexer, token)\n      };\n\n    case TokenKind.FLOAT:\n      lexer.advance();\n      return {\n        kind: Kind.FLOAT,\n        value: token.value,\n        loc: loc(lexer, token)\n      };\n\n    case TokenKind.STRING:\n    case TokenKind.BLOCK_STRING:\n      return parseStringLiteral(lexer);\n\n    case TokenKind.NAME:\n      if (token.value === 'true' || token.value === 'false') {\n        lexer.advance();\n        return {\n          kind: Kind.BOOLEAN,\n          value: token.value === 'true',\n          loc: loc(lexer, token)\n        };\n      } else if (token.value === 'null') {\n        lexer.advance();\n        return {\n          kind: Kind.NULL,\n          loc: loc(lexer, token)\n        };\n      }\n\n      lexer.advance();\n      return {\n        kind: Kind.ENUM,\n        value: token.value,\n        loc: loc(lexer, token)\n      };\n\n    case TokenKind.DOLLAR:\n      if (!isConst) {\n        return parseVariable(lexer);\n      }\n\n      break;\n  }\n\n  throw unexpected(lexer);\n}\n\nfunction parseStringLiteral(lexer) {\n  var token = lexer.token;\n  lexer.advance();\n  return {\n    kind: Kind.STRING,\n    value: token.value,\n    block: token.kind === TokenKind.BLOCK_STRING,\n    loc: loc(lexer, token)\n  };\n}\n\nexport function parseConstValue(lexer) {\n  return parseValueLiteral(lexer, true);\n}\n\nfunction parseValueValue(lexer) {\n  return parseValueLiteral(lexer, false);\n}\n/**\n * ListValue[Const] :\n *   - [ ]\n *   - [ Value[?Const]+ ]\n */\n\n\nfunction parseList(lexer, isConst) {\n  var start = lexer.token;\n  var item = isConst ? parseConstValue : parseValueValue;\n  return {\n    kind: Kind.LIST,\n    values: any(lexer, TokenKind.BRACKET_L, item, TokenKind.BRACKET_R),\n    loc: loc(lexer, start)\n  };\n}\n/**\n * ObjectValue[Const] :\n *   - { }\n *   - { ObjectField[?Const]+ }\n */\n\n\nfunction parseObject(lexer, isConst) {\n  var start = lexer.token;\n  expect(lexer, TokenKind.BRACE_L);\n  var fields = [];\n\n  while (!skip(lexer, TokenKind.BRACE_R)) {\n    fields.push(parseObjectField(lexer, isConst));\n  }\n\n  return {\n    kind: Kind.OBJECT,\n    fields: fields,\n    loc: loc(lexer, start)\n  };\n}\n/**\n * ObjectField[Const] : Name : Value[?Const]\n */\n\n\nfunction parseObjectField(lexer, isConst) {\n  var start = lexer.token;\n  return {\n    kind: Kind.OBJECT_FIELD,\n    name: parseName(lexer),\n    value: (expect(lexer, TokenKind.COLON), parseValueLiteral(lexer, isConst)),\n    loc: loc(lexer, start)\n  };\n} // Implements the parsing rules in the Directives section.\n\n/**\n * Directives[Const] : Directive[?Const]+\n */\n\n\nfunction parseDirectives(lexer, isConst) {\n  var directives = [];\n\n  while (peek(lexer, TokenKind.AT)) {\n    directives.push(parseDirective(lexer, isConst));\n  }\n\n  return directives;\n}\n/**\n * Directive[Const] : @ Name Arguments[?Const]?\n */\n\n\nfunction parseDirective(lexer, isConst) {\n  var start = lexer.token;\n  expect(lexer, TokenKind.AT);\n  return {\n    kind: Kind.DIRECTIVE,\n    name: parseName(lexer),\n    arguments: parseArguments(lexer, isConst),\n    loc: loc(lexer, start)\n  };\n} // Implements the parsing rules in the Types section.\n\n/**\n * Type :\n *   - NamedType\n *   - ListType\n *   - NonNullType\n */\n\n\nexport function parseTypeReference(lexer) {\n  var start = lexer.token;\n  var type;\n\n  if (skip(lexer, TokenKind.BRACKET_L)) {\n    type = parseTypeReference(lexer);\n    expect(lexer, TokenKind.BRACKET_R);\n    type = {\n      kind: Kind.LIST_TYPE,\n      type: type,\n      loc: loc(lexer, start)\n    };\n  } else {\n    type = parseNamedType(lexer);\n  }\n\n  if (skip(lexer, TokenKind.BANG)) {\n    return {\n      kind: Kind.NON_NULL_TYPE,\n      type: type,\n      loc: loc(lexer, start)\n    };\n  }\n\n  return type;\n}\n/**\n * NamedType : Name\n */\n\nexport function parseNamedType(lexer) {\n  var start = lexer.token;\n  return {\n    kind: Kind.NAMED_TYPE,\n    name: parseName(lexer),\n    loc: loc(lexer, start)\n  };\n} // Implements the parsing rules in the Type Definition section.\n\n/**\n * TypeSystemDefinition :\n *   - SchemaDefinition\n *   - TypeDefinition\n *   - DirectiveDefinition\n *\n * TypeDefinition :\n *   - ScalarTypeDefinition\n *   - ObjectTypeDefinition\n *   - InterfaceTypeDefinition\n *   - UnionTypeDefinition\n *   - EnumTypeDefinition\n *   - InputObjectTypeDefinition\n */\n\nfunction parseTypeSystemDefinition(lexer) {\n  // Many definitions begin with a description and require a lookahead.\n  var keywordToken = peekDescription(lexer) ? lexer.lookahead() : lexer.token;\n\n  if (keywordToken.kind === TokenKind.NAME) {\n    switch (keywordToken.value) {\n      case 'schema':\n        return parseSchemaDefinition(lexer);\n\n      case 'scalar':\n        return parseScalarTypeDefinition(lexer);\n\n      case 'type':\n        return parseObjectTypeDefinition(lexer);\n\n      case 'interface':\n        return parseInterfaceTypeDefinition(lexer);\n\n      case 'union':\n        return parseUnionTypeDefinition(lexer);\n\n      case 'enum':\n        return parseEnumTypeDefinition(lexer);\n\n      case 'input':\n        return parseInputObjectTypeDefinition(lexer);\n\n      case 'directive':\n        return parseDirectiveDefinition(lexer);\n    }\n  }\n\n  throw unexpected(lexer, keywordToken);\n}\n\nfunction peekDescription(lexer) {\n  return peek(lexer, TokenKind.STRING) || peek(lexer, TokenKind.BLOCK_STRING);\n}\n/**\n * Description : StringValue\n */\n\n\nfunction parseDescription(lexer) {\n  if (peekDescription(lexer)) {\n    return parseStringLiteral(lexer);\n  }\n}\n/**\n * SchemaDefinition : schema Directives[Const]? { OperationTypeDefinition+ }\n */\n\n\nfunction parseSchemaDefinition(lexer) {\n  var start = lexer.token;\n  expectKeyword(lexer, 'schema');\n  var directives = parseDirectives(lexer, true);\n  var operationTypes = many(lexer, TokenKind.BRACE_L, parseOperationTypeDefinition, TokenKind.BRACE_R);\n  return {\n    kind: Kind.SCHEMA_DEFINITION,\n    directives: directives,\n    operationTypes: operationTypes,\n    loc: loc(lexer, start)\n  };\n}\n/**\n * OperationTypeDefinition : OperationType : NamedType\n */\n\n\nfunction parseOperationTypeDefinition(lexer) {\n  var start = lexer.token;\n  var operation = parseOperationType(lexer);\n  expect(lexer, TokenKind.COLON);\n  var type = parseNamedType(lexer);\n  return {\n    kind: Kind.OPERATION_TYPE_DEFINITION,\n    operation: operation,\n    type: type,\n    loc: loc(lexer, start)\n  };\n}\n/**\n * ScalarTypeDefinition : Description? scalar Name Directives[Const]?\n */\n\n\nfunction parseScalarTypeDefinition(lexer) {\n  var start = lexer.token;\n  var description = parseDescription(lexer);\n  expectKeyword(lexer, 'scalar');\n  var name = parseName(lexer);\n  var directives = parseDirectives(lexer, true);\n  return {\n    kind: Kind.SCALAR_TYPE_DEFINITION,\n    description: description,\n    name: name,\n    directives: directives,\n    loc: loc(lexer, start)\n  };\n}\n/**\n * ObjectTypeDefinition :\n *   Description?\n *   type Name ImplementsInterfaces? Directives[Const]? FieldsDefinition?\n */\n\n\nfunction parseObjectTypeDefinition(lexer) {\n  var start = lexer.token;\n  var description = parseDescription(lexer);\n  expectKeyword(lexer, 'type');\n  var name = parseName(lexer);\n  var interfaces = parseImplementsInterfaces(lexer);\n  var directives = parseDirectives(lexer, true);\n  var fields = parseFieldsDefinition(lexer);\n  return {\n    kind: Kind.OBJECT_TYPE_DEFINITION,\n    description: description,\n    name: name,\n    interfaces: interfaces,\n    directives: directives,\n    fields: fields,\n    loc: loc(lexer, start)\n  };\n}\n/**\n * ImplementsInterfaces :\n *   - implements `&`? NamedType\n *   - ImplementsInterfaces & NamedType\n */\n\n\nfunction parseImplementsInterfaces(lexer) {\n  var types = [];\n\n  if (lexer.token.value === 'implements') {\n    lexer.advance(); // Optional leading ampersand\n\n    skip(lexer, TokenKind.AMP);\n\n    do {\n      types.push(parseNamedType(lexer));\n    } while (skip(lexer, TokenKind.AMP) || // Legacy support for the SDL?\n    lexer.options.allowLegacySDLImplementsInterfaces && peek(lexer, TokenKind.NAME));\n  }\n\n  return types;\n}\n/**\n * FieldsDefinition : { FieldDefinition+ }\n */\n\n\nfunction parseFieldsDefinition(lexer) {\n  // Legacy support for the SDL?\n  if (lexer.options.allowLegacySDLEmptyFields && peek(lexer, TokenKind.BRACE_L) && lexer.lookahead().kind === TokenKind.BRACE_R) {\n    lexer.advance();\n    lexer.advance();\n    return [];\n  }\n\n  return peek(lexer, TokenKind.BRACE_L) ? many(lexer, TokenKind.BRACE_L, parseFieldDefinition, TokenKind.BRACE_R) : [];\n}\n/**\n * FieldDefinition :\n *   - Description? Name ArgumentsDefinition? : Type Directives[Const]?\n */\n\n\nfunction parseFieldDefinition(lexer) {\n  var start = lexer.token;\n  var description = parseDescription(lexer);\n  var name = parseName(lexer);\n  var args = parseArgumentDefs(lexer);\n  expect(lexer, TokenKind.COLON);\n  var type = parseTypeReference(lexer);\n  var directives = parseDirectives(lexer, true);\n  return {\n    kind: Kind.FIELD_DEFINITION,\n    description: description,\n    name: name,\n    arguments: args,\n    type: type,\n    directives: directives,\n    loc: loc(lexer, start)\n  };\n}\n/**\n * ArgumentsDefinition : ( InputValueDefinition+ )\n */\n\n\nfunction parseArgumentDefs(lexer) {\n  if (!peek(lexer, TokenKind.PAREN_L)) {\n    return [];\n  }\n\n  return many(lexer, TokenKind.PAREN_L, parseInputValueDef, TokenKind.PAREN_R);\n}\n/**\n * InputValueDefinition :\n *   - Description? Name : Type DefaultValue? Directives[Const]?\n */\n\n\nfunction parseInputValueDef(lexer) {\n  var start = lexer.token;\n  var description = parseDescription(lexer);\n  var name = parseName(lexer);\n  expect(lexer, TokenKind.COLON);\n  var type = parseTypeReference(lexer);\n  var defaultValue;\n\n  if (skip(lexer, TokenKind.EQUALS)) {\n    defaultValue = parseConstValue(lexer);\n  }\n\n  var directives = parseDirectives(lexer, true);\n  return {\n    kind: Kind.INPUT_VALUE_DEFINITION,\n    description: description,\n    name: name,\n    type: type,\n    defaultValue: defaultValue,\n    directives: directives,\n    loc: loc(lexer, start)\n  };\n}\n/**\n * InterfaceTypeDefinition :\n *   - Description? interface Name Directives[Const]? FieldsDefinition?\n */\n\n\nfunction parseInterfaceTypeDefinition(lexer) {\n  var start = lexer.token;\n  var description = parseDescription(lexer);\n  expectKeyword(lexer, 'interface');\n  var name = parseName(lexer);\n  var directives = parseDirectives(lexer, true);\n  var fields = parseFieldsDefinition(lexer);\n  return {\n    kind: Kind.INTERFACE_TYPE_DEFINITION,\n    description: description,\n    name: name,\n    directives: directives,\n    fields: fields,\n    loc: loc(lexer, start)\n  };\n}\n/**\n * UnionTypeDefinition :\n *   - Description? union Name Directives[Const]? UnionMemberTypes?\n */\n\n\nfunction parseUnionTypeDefinition(lexer) {\n  var start = lexer.token;\n  var description = parseDescription(lexer);\n  expectKeyword(lexer, 'union');\n  var name = parseName(lexer);\n  var directives = parseDirectives(lexer, true);\n  var types = parseUnionMemberTypes(lexer);\n  return {\n    kind: Kind.UNION_TYPE_DEFINITION,\n    description: description,\n    name: name,\n    directives: directives,\n    types: types,\n    loc: loc(lexer, start)\n  };\n}\n/**\n * UnionMemberTypes :\n *   - = `|`? NamedType\n *   - UnionMemberTypes | NamedType\n */\n\n\nfunction parseUnionMemberTypes(lexer) {\n  var types = [];\n\n  if (skip(lexer, TokenKind.EQUALS)) {\n    // Optional leading pipe\n    skip(lexer, TokenKind.PIPE);\n\n    do {\n      types.push(parseNamedType(lexer));\n    } while (skip(lexer, TokenKind.PIPE));\n  }\n\n  return types;\n}\n/**\n * EnumTypeDefinition :\n *   - Description? enum Name Directives[Const]? EnumValuesDefinition?\n */\n\n\nfunction parseEnumTypeDefinition(lexer) {\n  var start = lexer.token;\n  var description = parseDescription(lexer);\n  expectKeyword(lexer, 'enum');\n  var name = parseName(lexer);\n  var directives = parseDirectives(lexer, true);\n  var values = parseEnumValuesDefinition(lexer);\n  return {\n    kind: Kind.ENUM_TYPE_DEFINITION,\n    description: description,\n    name: name,\n    directives: directives,\n    values: values,\n    loc: loc(lexer, start)\n  };\n}\n/**\n * EnumValuesDefinition : { EnumValueDefinition+ }\n */\n\n\nfunction parseEnumValuesDefinition(lexer) {\n  return peek(lexer, TokenKind.BRACE_L) ? many(lexer, TokenKind.BRACE_L, parseEnumValueDefinition, TokenKind.BRACE_R) : [];\n}\n/**\n * EnumValueDefinition : Description? EnumValue Directives[Const]?\n *\n * EnumValue : Name\n */\n\n\nfunction parseEnumValueDefinition(lexer) {\n  var start = lexer.token;\n  var description = parseDescription(lexer);\n  var name = parseName(lexer);\n  var directives = parseDirectives(lexer, true);\n  return {\n    kind: Kind.ENUM_VALUE_DEFINITION,\n    description: description,\n    name: name,\n    directives: directives,\n    loc: loc(lexer, start)\n  };\n}\n/**\n * InputObjectTypeDefinition :\n *   - Description? input Name Directives[Const]? InputFieldsDefinition?\n */\n\n\nfunction parseInputObjectTypeDefinition(lexer) {\n  var start = lexer.token;\n  var description = parseDescription(lexer);\n  expectKeyword(lexer, 'input');\n  var name = parseName(lexer);\n  var directives = parseDirectives(lexer, true);\n  var fields = parseInputFieldsDefinition(lexer);\n  return {\n    kind: Kind.INPUT_OBJECT_TYPE_DEFINITION,\n    description: description,\n    name: name,\n    directives: directives,\n    fields: fields,\n    loc: loc(lexer, start)\n  };\n}\n/**\n * InputFieldsDefinition : { InputValueDefinition+ }\n */\n\n\nfunction parseInputFieldsDefinition(lexer) {\n  return peek(lexer, TokenKind.BRACE_L) ? many(lexer, TokenKind.BRACE_L, parseInputValueDef, TokenKind.BRACE_R) : [];\n}\n/**\n * TypeSystemExtension :\n *   - SchemaExtension\n *   - TypeExtension\n *\n * TypeExtension :\n *   - ScalarTypeExtension\n *   - ObjectTypeExtension\n *   - InterfaceTypeExtension\n *   - UnionTypeExtension\n *   - EnumTypeExtension\n *   - InputObjectTypeDefinition\n */\n\n\nfunction parseTypeSystemExtension(lexer) {\n  var keywordToken = lexer.lookahead();\n\n  if (keywordToken.kind === TokenKind.NAME) {\n    switch (keywordToken.value) {\n      case 'schema':\n        return parseSchemaExtension(lexer);\n\n      case 'scalar':\n        return parseScalarTypeExtension(lexer);\n\n      case 'type':\n        return parseObjectTypeExtension(lexer);\n\n      case 'interface':\n        return parseInterfaceTypeExtension(lexer);\n\n      case 'union':\n        return parseUnionTypeExtension(lexer);\n\n      case 'enum':\n        return parseEnumTypeExtension(lexer);\n\n      case 'input':\n        return parseInputObjectTypeExtension(lexer);\n    }\n  }\n\n  throw unexpected(lexer, keywordToken);\n}\n/**\n * SchemaExtension :\n *  - extend schema Directives[Const]? { OperationTypeDefinition+ }\n *  - extend schema Directives[Const]\n */\n\n\nfunction parseSchemaExtension(lexer) {\n  var start = lexer.token;\n  expectKeyword(lexer, 'extend');\n  expectKeyword(lexer, 'schema');\n  var directives = parseDirectives(lexer, true);\n  var operationTypes = peek(lexer, TokenKind.BRACE_L) ? many(lexer, TokenKind.BRACE_L, parseOperationTypeDefinition, TokenKind.BRACE_R) : [];\n\n  if (directives.length === 0 && operationTypes.length === 0) {\n    throw unexpected(lexer);\n  }\n\n  return {\n    kind: Kind.SCHEMA_EXTENSION,\n    directives: directives,\n    operationTypes: operationTypes,\n    loc: loc(lexer, start)\n  };\n}\n/**\n * ScalarTypeExtension :\n *   - extend scalar Name Directives[Const]\n */\n\n\nfunction parseScalarTypeExtension(lexer) {\n  var start = lexer.token;\n  expectKeyword(lexer, 'extend');\n  expectKeyword(lexer, 'scalar');\n  var name = parseName(lexer);\n  var directives = parseDirectives(lexer, true);\n\n  if (directives.length === 0) {\n    throw unexpected(lexer);\n  }\n\n  return {\n    kind: Kind.SCALAR_TYPE_EXTENSION,\n    name: name,\n    directives: directives,\n    loc: loc(lexer, start)\n  };\n}\n/**\n * ObjectTypeExtension :\n *  - extend type Name ImplementsInterfaces? Directives[Const]? FieldsDefinition\n *  - extend type Name ImplementsInterfaces? Directives[Const]\n *  - extend type Name ImplementsInterfaces\n */\n\n\nfunction parseObjectTypeExtension(lexer) {\n  var start = lexer.token;\n  expectKeyword(lexer, 'extend');\n  expectKeyword(lexer, 'type');\n  var name = parseName(lexer);\n  var interfaces = parseImplementsInterfaces(lexer);\n  var directives = parseDirectives(lexer, true);\n  var fields = parseFieldsDefinition(lexer);\n\n  if (interfaces.length === 0 && directives.length === 0 && fields.length === 0) {\n    throw unexpected(lexer);\n  }\n\n  return {\n    kind: Kind.OBJECT_TYPE_EXTENSION,\n    name: name,\n    interfaces: interfaces,\n    directives: directives,\n    fields: fields,\n    loc: loc(lexer, start)\n  };\n}\n/**\n * InterfaceTypeExtension :\n *   - extend interface Name Directives[Const]? FieldsDefinition\n *   - extend interface Name Directives[Const]\n */\n\n\nfunction parseInterfaceTypeExtension(lexer) {\n  var start = lexer.token;\n  expectKeyword(lexer, 'extend');\n  expectKeyword(lexer, 'interface');\n  var name = parseName(lexer);\n  var directives = parseDirectives(lexer, true);\n  var fields = parseFieldsDefinition(lexer);\n\n  if (directives.length === 0 && fields.length === 0) {\n    throw unexpected(lexer);\n  }\n\n  return {\n    kind: Kind.INTERFACE_TYPE_EXTENSION,\n    name: name,\n    directives: directives,\n    fields: fields,\n    loc: loc(lexer, start)\n  };\n}\n/**\n * UnionTypeExtension :\n *   - extend union Name Directives[Const]? UnionMemberTypes\n *   - extend union Name Directives[Const]\n */\n\n\nfunction parseUnionTypeExtension(lexer) {\n  var start = lexer.token;\n  expectKeyword(lexer, 'extend');\n  expectKeyword(lexer, 'union');\n  var name = parseName(lexer);\n  var directives = parseDirectives(lexer, true);\n  var types = parseUnionMemberTypes(lexer);\n\n  if (directives.length === 0 && types.length === 0) {\n    throw unexpected(lexer);\n  }\n\n  return {\n    kind: Kind.UNION_TYPE_EXTENSION,\n    name: name,\n    directives: directives,\n    types: types,\n    loc: loc(lexer, start)\n  };\n}\n/**\n * EnumTypeExtension :\n *   - extend enum Name Directives[Const]? EnumValuesDefinition\n *   - extend enum Name Directives[Const]\n */\n\n\nfunction parseEnumTypeExtension(lexer) {\n  var start = lexer.token;\n  expectKeyword(lexer, 'extend');\n  expectKeyword(lexer, 'enum');\n  var name = parseName(lexer);\n  var directives = parseDirectives(lexer, true);\n  var values = parseEnumValuesDefinition(lexer);\n\n  if (directives.length === 0 && values.length === 0) {\n    throw unexpected(lexer);\n  }\n\n  return {\n    kind: Kind.ENUM_TYPE_EXTENSION,\n    name: name,\n    directives: directives,\n    values: values,\n    loc: loc(lexer, start)\n  };\n}\n/**\n * InputObjectTypeExtension :\n *   - extend input Name Directives[Const]? InputFieldsDefinition\n *   - extend input Name Directives[Const]\n */\n\n\nfunction parseInputObjectTypeExtension(lexer) {\n  var start = lexer.token;\n  expectKeyword(lexer, 'extend');\n  expectKeyword(lexer, 'input');\n  var name = parseName(lexer);\n  var directives = parseDirectives(lexer, true);\n  var fields = parseInputFieldsDefinition(lexer);\n\n  if (directives.length === 0 && fields.length === 0) {\n    throw unexpected(lexer);\n  }\n\n  return {\n    kind: Kind.INPUT_OBJECT_TYPE_EXTENSION,\n    name: name,\n    directives: directives,\n    fields: fields,\n    loc: loc(lexer, start)\n  };\n}\n/**\n * DirectiveDefinition :\n *   - Description? directive @ Name ArgumentsDefinition? on DirectiveLocations\n */\n\n\nfunction parseDirectiveDefinition(lexer) {\n  var start = lexer.token;\n  var description = parseDescription(lexer);\n  expectKeyword(lexer, 'directive');\n  expect(lexer, TokenKind.AT);\n  var name = parseName(lexer);\n  var args = parseArgumentDefs(lexer);\n  expectKeyword(lexer, 'on');\n  var locations = parseDirectiveLocations(lexer);\n  return {\n    kind: Kind.DIRECTIVE_DEFINITION,\n    description: description,\n    name: name,\n    arguments: args,\n    locations: locations,\n    loc: loc(lexer, start)\n  };\n}\n/**\n * DirectiveLocations :\n *   - `|`? DirectiveLocation\n *   - DirectiveLocations | DirectiveLocation\n */\n\n\nfunction parseDirectiveLocations(lexer) {\n  // Optional leading pipe\n  skip(lexer, TokenKind.PIPE);\n  var locations = [];\n\n  do {\n    locations.push(parseDirectiveLocation(lexer));\n  } while (skip(lexer, TokenKind.PIPE));\n\n  return locations;\n}\n/*\n * DirectiveLocation :\n *   - ExecutableDirectiveLocation\n *   - TypeSystemDirectiveLocation\n *\n * ExecutableDirectiveLocation : one of\n *   `QUERY`\n *   `MUTATION`\n *   `SUBSCRIPTION`\n *   `FIELD`\n *   `FRAGMENT_DEFINITION`\n *   `FRAGMENT_SPREAD`\n *   `INLINE_FRAGMENT`\n *\n * TypeSystemDirectiveLocation : one of\n *   `SCHEMA`\n *   `SCALAR`\n *   `OBJECT`\n *   `FIELD_DEFINITION`\n *   `ARGUMENT_DEFINITION`\n *   `INTERFACE`\n *   `UNION`\n *   `ENUM`\n *   `ENUM_VALUE`\n *   `INPUT_OBJECT`\n *   `INPUT_FIELD_DEFINITION`\n */\n\n\nfunction parseDirectiveLocation(lexer) {\n  var start = lexer.token;\n  var name = parseName(lexer);\n\n  if (DirectiveLocation.hasOwnProperty(name.value)) {\n    return name;\n  }\n\n  throw unexpected(lexer, start);\n} // Core parsing utility functions\n\n/**\n * Returns a location object, used to identify the place in\n * the source that created a given parsed object.\n */\n\n\nfunction loc(lexer, startToken) {\n  if (!lexer.options.noLocation) {\n    return new Loc(startToken, lexer.lastToken, lexer.source);\n  }\n}\n\nfunction Loc(startToken, endToken, source) {\n  this.start = startToken.start;\n  this.end = endToken.end;\n  this.startToken = startToken;\n  this.endToken = endToken;\n  this.source = source;\n} // Print a simplified form when appearing in JSON/util.inspect.\n\n\nLoc.prototype.toJSON = Loc.prototype.inspect = function toJSON() {\n  return {\n    start: this.start,\n    end: this.end\n  };\n};\n/**\n * Determines if the next token is of a given kind\n */\n\n\nfunction peek(lexer, kind) {\n  return lexer.token.kind === kind;\n}\n/**\n * If the next token is of the given kind, return true after advancing\n * the lexer. Otherwise, do not change the parser state and return false.\n */\n\n\nfunction skip(lexer, kind) {\n  var match = lexer.token.kind === kind;\n\n  if (match) {\n    lexer.advance();\n  }\n\n  return match;\n}\n/**\n * If the next token is of the given kind, return that token after advancing\n * the lexer. Otherwise, do not change the parser state and throw an error.\n */\n\n\nfunction expect(lexer, kind) {\n  var token = lexer.token;\n\n  if (token.kind === kind) {\n    lexer.advance();\n    return token;\n  }\n\n  throw syntaxError(lexer.source, token.start, \"Expected \".concat(kind, \", found \").concat(getTokenDesc(token)));\n}\n/**\n * If the next token is a keyword with the given value, return that token after\n * advancing the lexer. Otherwise, do not change the parser state and return\n * false.\n */\n\n\nfunction expectKeyword(lexer, value) {\n  var token = lexer.token;\n\n  if (token.kind === TokenKind.NAME && token.value === value) {\n    lexer.advance();\n    return token;\n  }\n\n  throw syntaxError(lexer.source, token.start, \"Expected \\\"\".concat(value, \"\\\", found \").concat(getTokenDesc(token)));\n}\n/**\n * Helper function for creating an error when an unexpected lexed token\n * is encountered.\n */\n\n\nfunction unexpected(lexer, atToken) {\n  var token = atToken || lexer.token;\n  return syntaxError(lexer.source, token.start, \"Unexpected \".concat(getTokenDesc(token)));\n}\n/**\n * Returns a possibly empty list of parse nodes, determined by\n * the parseFn. This list begins with a lex token of openKind\n * and ends with a lex token of closeKind. Advances the parser\n * to the next lex token after the closing token.\n */\n\n\nfunction any(lexer, openKind, parseFn, closeKind) {\n  expect(lexer, openKind);\n  var nodes = [];\n\n  while (!skip(lexer, closeKind)) {\n    nodes.push(parseFn(lexer));\n  }\n\n  return nodes;\n}\n/**\n * Returns a non-empty list of parse nodes, determined by\n * the parseFn. This list begins with a lex token of openKind\n * and ends with a lex token of closeKind. Advances the parser\n * to the next lex token after the closing token.\n */\n\n\nfunction many(lexer, openKind, parseFn, closeKind) {\n  expect(lexer, openKind);\n  var nodes = [parseFn(lexer)];\n\n  while (!skip(lexer, closeKind)) {\n    nodes.push(parseFn(lexer));\n  }\n\n  return nodes;\n}","/**\n * Copyright (c) 2015-present, Facebook, Inc.\n *\n * This source code is licensed under the MIT license found in the\n * LICENSE file in the root directory of this source tree.\n *\n *  strict\n */\n\n/**\n * A visitor is provided to visit, it contains the collection of\n * relevant functions to be called during the visitor's traversal.\n */\n\n/**\n * A visitor is comprised of visit functions, which are called on each node\n * during the visitor's traversal.\n */\n\n/**\n * A KeyMap describes each the traversable properties of each kind of node.\n */\nexport var QueryDocumentKeys = {\n  Name: [],\n  Document: ['definitions'],\n  OperationDefinition: ['name', 'variableDefinitions', 'directives', 'selectionSet'],\n  VariableDefinition: ['variable', 'type', 'defaultValue', 'directives'],\n  Variable: ['name'],\n  SelectionSet: ['selections'],\n  Field: ['alias', 'name', 'arguments', 'directives', 'selectionSet'],\n  Argument: ['name', 'value'],\n  FragmentSpread: ['name', 'directives'],\n  InlineFragment: ['typeCondition', 'directives', 'selectionSet'],\n  FragmentDefinition: ['name', // Note: fragment variable definitions are experimental and may be changed\n  // or removed in the future.\n  'variableDefinitions', 'typeCondition', 'directives', 'selectionSet'],\n  IntValue: [],\n  FloatValue: [],\n  StringValue: [],\n  BooleanValue: [],\n  NullValue: [],\n  EnumValue: [],\n  ListValue: ['values'],\n  ObjectValue: ['fields'],\n  ObjectField: ['name', 'value'],\n  Directive: ['name', 'arguments'],\n  NamedType: ['name'],\n  ListType: ['type'],\n  NonNullType: ['type'],\n  SchemaDefinition: ['directives', 'operationTypes'],\n  OperationTypeDefinition: ['type'],\n  ScalarTypeDefinition: ['description', 'name', 'directives'],\n  ObjectTypeDefinition: ['description', 'name', 'interfaces', 'directives', 'fields'],\n  FieldDefinition: ['description', 'name', 'arguments', 'type', 'directives'],\n  InputValueDefinition: ['description', 'name', 'type', 'defaultValue', 'directives'],\n  InterfaceTypeDefinition: ['description', 'name', 'directives', 'fields'],\n  UnionTypeDefinition: ['description', 'name', 'directives', 'types'],\n  EnumTypeDefinition: ['description', 'name', 'directives', 'values'],\n  EnumValueDefinition: ['description', 'name', 'directives'],\n  InputObjectTypeDefinition: ['description', 'name', 'directives', 'fields'],\n  DirectiveDefinition: ['description', 'name', 'arguments', 'locations'],\n  SchemaExtension: ['directives', 'operationTypes'],\n  ScalarTypeExtension: ['name', 'directives'],\n  ObjectTypeExtension: ['name', 'interfaces', 'directives', 'fields'],\n  InterfaceTypeExtension: ['name', 'directives', 'fields'],\n  UnionTypeExtension: ['name', 'directives', 'types'],\n  EnumTypeExtension: ['name', 'directives', 'values'],\n  InputObjectTypeExtension: ['name', 'directives', 'fields']\n};\nexport var BREAK = {};\n/**\n * visit() will walk through an AST using a depth first traversal, calling\n * the visitor's enter function at each node in the traversal, and calling the\n * leave function after visiting that node and all of its child nodes.\n *\n * By returning different values from the enter and leave functions, the\n * behavior of the visitor can be altered, including skipping over a sub-tree of\n * the AST (by returning false), editing the AST by returning a value or null\n * to remove the value, or to stop the whole traversal by returning BREAK.\n *\n * When using visit() to edit an AST, the original AST will not be modified, and\n * a new version of the AST with the changes applied will be returned from the\n * visit function.\n *\n *     const editedAST = visit(ast, {\n *       enter(node, key, parent, path, ancestors) {\n *         // @return\n *         //   undefined: no action\n *         //   false: skip visiting this node\n *         //   visitor.BREAK: stop visiting altogether\n *         //   null: delete this node\n *         //   any value: replace this node with the returned value\n *       },\n *       leave(node, key, parent, path, ancestors) {\n *         // @return\n *         //   undefined: no action\n *         //   false: no action\n *         //   visitor.BREAK: stop visiting altogether\n *         //   null: delete this node\n *         //   any value: replace this node with the returned value\n *       }\n *     });\n *\n * Alternatively to providing enter() and leave() functions, a visitor can\n * instead provide functions named the same as the kinds of AST nodes, or\n * enter/leave visitors at a named key, leading to four permutations of\n * visitor API:\n *\n * 1) Named visitors triggered when entering a node a specific kind.\n *\n *     visit(ast, {\n *       Kind(node) {\n *         // enter the \"Kind\" node\n *       }\n *     })\n *\n * 2) Named visitors that trigger upon entering and leaving a node of\n *    a specific kind.\n *\n *     visit(ast, {\n *       Kind: {\n *         enter(node) {\n *           // enter the \"Kind\" node\n *         }\n *         leave(node) {\n *           // leave the \"Kind\" node\n *         }\n *       }\n *     })\n *\n * 3) Generic visitors that trigger upon entering and leaving any node.\n *\n *     visit(ast, {\n *       enter(node) {\n *         // enter any node\n *       },\n *       leave(node) {\n *         // leave any node\n *       }\n *     })\n *\n * 4) Parallel visitors for entering and leaving nodes of a specific kind.\n *\n *     visit(ast, {\n *       enter: {\n *         Kind(node) {\n *           // enter the \"Kind\" node\n *         }\n *       },\n *       leave: {\n *         Kind(node) {\n *           // leave the \"Kind\" node\n *         }\n *       }\n *     })\n */\n\nexport function visit(root, visitor) {\n  var visitorKeys = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : QueryDocumentKeys;\n\n  /* eslint-disable no-undef-init */\n  var stack = undefined;\n  var inArray = Array.isArray(root);\n  var keys = [root];\n  var index = -1;\n  var edits = [];\n  var node = undefined;\n  var key = undefined;\n  var parent = undefined;\n  var path = [];\n  var ancestors = [];\n  var newRoot = root;\n  /* eslint-enable no-undef-init */\n\n  do {\n    index++;\n    var isLeaving = index === keys.length;\n    var isEdited = isLeaving && edits.length !== 0;\n\n    if (isLeaving) {\n      key = ancestors.length === 0 ? undefined : path[path.length - 1];\n      node = parent;\n      parent = ancestors.pop();\n\n      if (isEdited) {\n        if (inArray) {\n          node = node.slice();\n        } else {\n          var clone = {};\n\n          for (var k in node) {\n            if (node.hasOwnProperty(k)) {\n              clone[k] = node[k];\n            }\n          }\n\n          node = clone;\n        }\n\n        var editOffset = 0;\n\n        for (var ii = 0; ii < edits.length; ii++) {\n          var editKey = edits[ii][0];\n          var editValue = edits[ii][1];\n\n          if (inArray) {\n            editKey -= editOffset;\n          }\n\n          if (inArray && editValue === null) {\n            node.splice(editKey, 1);\n            editOffset++;\n          } else {\n            node[editKey] = editValue;\n          }\n        }\n      }\n\n      index = stack.index;\n      keys = stack.keys;\n      edits = stack.edits;\n      inArray = stack.inArray;\n      stack = stack.prev;\n    } else {\n      key = parent ? inArray ? index : keys[index] : undefined;\n      node = parent ? parent[key] : newRoot;\n\n      if (node === null || node === undefined) {\n        continue;\n      }\n\n      if (parent) {\n        path.push(key);\n      }\n    }\n\n    var result = void 0;\n\n    if (!Array.isArray(node)) {\n      if (!isNode(node)) {\n        throw new Error('Invalid AST Node: ' + JSON.stringify(node));\n      }\n\n      var visitFn = getVisitFn(visitor, node.kind, isLeaving);\n\n      if (visitFn) {\n        result = visitFn.call(visitor, node, key, parent, path, ancestors);\n\n        if (result === BREAK) {\n          break;\n        }\n\n        if (result === false) {\n          if (!isLeaving) {\n            path.pop();\n            continue;\n          }\n        } else if (result !== undefined) {\n          edits.push([key, result]);\n\n          if (!isLeaving) {\n            if (isNode(result)) {\n              node = result;\n            } else {\n              path.pop();\n              continue;\n            }\n          }\n        }\n      }\n    }\n\n    if (result === undefined && isEdited) {\n      edits.push([key, node]);\n    }\n\n    if (isLeaving) {\n      path.pop();\n    } else {\n      stack = {\n        inArray: inArray,\n        index: index,\n        keys: keys,\n        edits: edits,\n        prev: stack\n      };\n      inArray = Array.isArray(node);\n      keys = inArray ? node : visitorKeys[node.kind] || [];\n      index = -1;\n      edits = [];\n\n      if (parent) {\n        ancestors.push(parent);\n      }\n\n      parent = node;\n    }\n  } while (stack !== undefined);\n\n  if (edits.length !== 0) {\n    newRoot = edits[edits.length - 1][1];\n  }\n\n  return newRoot;\n}\n\nfunction isNode(maybeNode) {\n  return Boolean(maybeNode && typeof maybeNode.kind === 'string');\n}\n/**\n * Creates a new visitor instance which delegates to many visitors to run in\n * parallel. Each visitor will be visited for each node before moving on.\n *\n * If a prior visitor edits a node, no following visitors will see that node.\n */\n\n\nexport function visitInParallel(visitors) {\n  var skipping = new Array(visitors.length);\n  return {\n    enter: function enter(node) {\n      for (var i = 0; i < visitors.length; i++) {\n        if (!skipping[i]) {\n          var fn = getVisitFn(visitors[i], node.kind,\n          /* isLeaving */\n          false);\n\n          if (fn) {\n            var result = fn.apply(visitors[i], arguments);\n\n            if (result === false) {\n              skipping[i] = node;\n            } else if (result === BREAK) {\n              skipping[i] = BREAK;\n            } else if (result !== undefined) {\n              return result;\n            }\n          }\n        }\n      }\n    },\n    leave: function leave(node) {\n      for (var i = 0; i < visitors.length; i++) {\n        if (!skipping[i]) {\n          var fn = getVisitFn(visitors[i], node.kind,\n          /* isLeaving */\n          true);\n\n          if (fn) {\n            var result = fn.apply(visitors[i], arguments);\n\n            if (result === BREAK) {\n              skipping[i] = BREAK;\n            } else if (result !== undefined && result !== false) {\n              return result;\n            }\n          }\n        } else if (skipping[i] === node) {\n          skipping[i] = null;\n        }\n      }\n    }\n  };\n}\n/**\n * Creates a new visitor instance which maintains a provided TypeInfo instance\n * along with visiting visitor.\n */\n\nexport function visitWithTypeInfo(typeInfo, visitor) {\n  return {\n    enter: function enter(node) {\n      typeInfo.enter(node);\n      var fn = getVisitFn(visitor, node.kind,\n      /* isLeaving */\n      false);\n\n      if (fn) {\n        var result = fn.apply(visitor, arguments);\n\n        if (result !== undefined) {\n          typeInfo.leave(node);\n\n          if (isNode(result)) {\n            typeInfo.enter(result);\n          }\n        }\n\n        return result;\n      }\n    },\n    leave: function leave(node) {\n      var fn = getVisitFn(visitor, node.kind,\n      /* isLeaving */\n      true);\n      var result;\n\n      if (fn) {\n        result = fn.apply(visitor, arguments);\n      }\n\n      typeInfo.leave(node);\n      return result;\n    }\n  };\n}\n/**\n * Given a visitor instance, if it is leaving or not, and a node kind, return\n * the function the visitor runtime should call.\n */\n\nexport function getVisitFn(visitor, kind, isLeaving) {\n  var kindVisitor = visitor[kind];\n\n  if (kindVisitor) {\n    if (!isLeaving && typeof kindVisitor === 'function') {\n      // { Kind() {} }\n      return kindVisitor;\n    }\n\n    var kindSpecificVisitor = isLeaving ? kindVisitor.leave : kindVisitor.enter;\n\n    if (typeof kindSpecificVisitor === 'function') {\n      // { Kind: { enter() {}, leave() {} } }\n      return kindSpecificVisitor;\n    }\n  } else {\n    var specificVisitor = isLeaving ? visitor.leave : visitor.enter;\n\n    if (specificVisitor) {\n      if (typeof specificVisitor === 'function') {\n        // { enter() {}, leave() {} }\n        return specificVisitor;\n      }\n\n      var specificKindVisitor = specificVisitor[kind];\n\n      if (typeof specificKindVisitor === 'function') {\n        // { enter: { Kind() {} }, leave: { Kind() {} } }\n        return specificKindVisitor;\n      }\n    }\n  }\n}","/**\n * Copyright (c) 2015-present, Facebook, Inc.\n *\n * This source code is licensed under the MIT license found in the\n * LICENSE file in the root directory of this source tree.\n */\nimport { visit } from './visitor';\n/**\n * Converts an AST into a string, using one set of reasonable\n * formatting rules.\n */\n\nexport function print(ast) {\n  return visit(ast, {\n    leave: printDocASTReducer\n  });\n}\nvar printDocASTReducer = {\n  Name: function Name(node) {\n    return node.value;\n  },\n  Variable: function Variable(node) {\n    return '$' + node.name;\n  },\n  // Document\n  Document: function Document(node) {\n    return join(node.definitions, '\\n\\n') + '\\n';\n  },\n  OperationDefinition: function OperationDefinition(node) {\n    var op = node.operation;\n    var name = node.name;\n    var varDefs = wrap('(', join(node.variableDefinitions, ', '), ')');\n    var directives = join(node.directives, ' ');\n    var selectionSet = node.selectionSet; // Anonymous queries with no directives or variable definitions can use\n    // the query short form.\n\n    return !name && !directives && !varDefs && op === 'query' ? selectionSet : join([op, join([name, varDefs]), directives, selectionSet], ' ');\n  },\n  VariableDefinition: function VariableDefinition(_ref) {\n    var variable = _ref.variable,\n        type = _ref.type,\n        defaultValue = _ref.defaultValue,\n        directives = _ref.directives;\n    return variable + ': ' + type + wrap(' = ', defaultValue) + wrap(' ', join(directives, ' '));\n  },\n  SelectionSet: function SelectionSet(_ref2) {\n    var selections = _ref2.selections;\n    return block(selections);\n  },\n  Field: function Field(_ref3) {\n    var alias = _ref3.alias,\n        name = _ref3.name,\n        args = _ref3.arguments,\n        directives = _ref3.directives,\n        selectionSet = _ref3.selectionSet;\n    return join([wrap('', alias, ': ') + name + wrap('(', join(args, ', '), ')'), join(directives, ' '), selectionSet], ' ');\n  },\n  Argument: function Argument(_ref4) {\n    var name = _ref4.name,\n        value = _ref4.value;\n    return name + ': ' + value;\n  },\n  // Fragments\n  FragmentSpread: function FragmentSpread(_ref5) {\n    var name = _ref5.name,\n        directives = _ref5.directives;\n    return '...' + name + wrap(' ', join(directives, ' '));\n  },\n  InlineFragment: function InlineFragment(_ref6) {\n    var typeCondition = _ref6.typeCondition,\n        directives = _ref6.directives,\n        selectionSet = _ref6.selectionSet;\n    return join(['...', wrap('on ', typeCondition), join(directives, ' '), selectionSet], ' ');\n  },\n  FragmentDefinition: function FragmentDefinition(_ref7) {\n    var name = _ref7.name,\n        typeCondition = _ref7.typeCondition,\n        variableDefinitions = _ref7.variableDefinitions,\n        directives = _ref7.directives,\n        selectionSet = _ref7.selectionSet;\n    return (// Note: fragment variable definitions are experimental and may be changed\n      // or removed in the future.\n      \"fragment \".concat(name).concat(wrap('(', join(variableDefinitions, ', '), ')'), \" \") + \"on \".concat(typeCondition, \" \").concat(wrap('', join(directives, ' '), ' ')) + selectionSet\n    );\n  },\n  // Value\n  IntValue: function IntValue(_ref8) {\n    var value = _ref8.value;\n    return value;\n  },\n  FloatValue: function FloatValue(_ref9) {\n    var value = _ref9.value;\n    return value;\n  },\n  StringValue: function StringValue(_ref10, key) {\n    var value = _ref10.value,\n        isBlockString = _ref10.block;\n    return isBlockString ? printBlockString(value, key === 'description') : JSON.stringify(value);\n  },\n  BooleanValue: function BooleanValue(_ref11) {\n    var value = _ref11.value;\n    return value ? 'true' : 'false';\n  },\n  NullValue: function NullValue() {\n    return 'null';\n  },\n  EnumValue: function EnumValue(_ref12) {\n    var value = _ref12.value;\n    return value;\n  },\n  ListValue: function ListValue(_ref13) {\n    var values = _ref13.values;\n    return '[' + join(values, ', ') + ']';\n  },\n  ObjectValue: function ObjectValue(_ref14) {\n    var fields = _ref14.fields;\n    return '{' + join(fields, ', ') + '}';\n  },\n  ObjectField: function ObjectField(_ref15) {\n    var name = _ref15.name,\n        value = _ref15.value;\n    return name + ': ' + value;\n  },\n  // Directive\n  Directive: function Directive(_ref16) {\n    var name = _ref16.name,\n        args = _ref16.arguments;\n    return '@' + name + wrap('(', join(args, ', '), ')');\n  },\n  // Type\n  NamedType: function NamedType(_ref17) {\n    var name = _ref17.name;\n    return name;\n  },\n  ListType: function ListType(_ref18) {\n    var type = _ref18.type;\n    return '[' + type + ']';\n  },\n  NonNullType: function NonNullType(_ref19) {\n    var type = _ref19.type;\n    return type + '!';\n  },\n  // Type System Definitions\n  SchemaDefinition: function SchemaDefinition(_ref20) {\n    var directives = _ref20.directives,\n        operationTypes = _ref20.operationTypes;\n    return join(['schema', join(directives, ' '), block(operationTypes)], ' ');\n  },\n  OperationTypeDefinition: function OperationTypeDefinition(_ref21) {\n    var operation = _ref21.operation,\n        type = _ref21.type;\n    return operation + ': ' + type;\n  },\n  ScalarTypeDefinition: addDescription(function (_ref22) {\n    var name = _ref22.name,\n        directives = _ref22.directives;\n    return join(['scalar', name, join(directives, ' ')], ' ');\n  }),\n  ObjectTypeDefinition: addDescription(function (_ref23) {\n    var name = _ref23.name,\n        interfaces = _ref23.interfaces,\n        directives = _ref23.directives,\n        fields = _ref23.fields;\n    return join(['type', name, wrap('implements ', join(interfaces, ' & ')), join(directives, ' '), block(fields)], ' ');\n  }),\n  FieldDefinition: addDescription(function (_ref24) {\n    var name = _ref24.name,\n        args = _ref24.arguments,\n        type = _ref24.type,\n        directives = _ref24.directives;\n    return name + (args.every(function (arg) {\n      return arg.indexOf('\\n') === -1;\n    }) ? wrap('(', join(args, ', '), ')') : wrap('(\\n', indent(join(args, '\\n')), '\\n)')) + ': ' + type + wrap(' ', join(directives, ' '));\n  }),\n  InputValueDefinition: addDescription(function (_ref25) {\n    var name = _ref25.name,\n        type = _ref25.type,\n        defaultValue = _ref25.defaultValue,\n        directives = _ref25.directives;\n    return join([name + ': ' + type, wrap('= ', defaultValue), join(directives, ' ')], ' ');\n  }),\n  InterfaceTypeDefinition: addDescription(function (_ref26) {\n    var name = _ref26.name,\n        directives = _ref26.directives,\n        fields = _ref26.fields;\n    return join(['interface', name, join(directives, ' '), block(fields)], ' ');\n  }),\n  UnionTypeDefinition: addDescription(function (_ref27) {\n    var name = _ref27.name,\n        directives = _ref27.directives,\n        types = _ref27.types;\n    return join(['union', name, join(directives, ' '), types && types.length !== 0 ? '= ' + join(types, ' | ') : ''], ' ');\n  }),\n  EnumTypeDefinition: addDescription(function (_ref28) {\n    var name = _ref28.name,\n        directives = _ref28.directives,\n        values = _ref28.values;\n    return join(['enum', name, join(directives, ' '), block(values)], ' ');\n  }),\n  EnumValueDefinition: addDescription(function (_ref29) {\n    var name = _ref29.name,\n        directives = _ref29.directives;\n    return join([name, join(directives, ' ')], ' ');\n  }),\n  InputObjectTypeDefinition: addDescription(function (_ref30) {\n    var name = _ref30.name,\n        directives = _ref30.directives,\n        fields = _ref30.fields;\n    return join(['input', name, join(directives, ' '), block(fields)], ' ');\n  }),\n  DirectiveDefinition: addDescription(function (_ref31) {\n    var name = _ref31.name,\n        args = _ref31.arguments,\n        locations = _ref31.locations;\n    return 'directive @' + name + (args.every(function (arg) {\n      return arg.indexOf('\\n') === -1;\n    }) ? wrap('(', join(args, ', '), ')') : wrap('(\\n', indent(join(args, '\\n')), '\\n)')) + ' on ' + join(locations, ' | ');\n  }),\n  SchemaExtension: function SchemaExtension(_ref32) {\n    var directives = _ref32.directives,\n        operationTypes = _ref32.operationTypes;\n    return join(['extend schema', join(directives, ' '), block(operationTypes)], ' ');\n  },\n  ScalarTypeExtension: function ScalarTypeExtension(_ref33) {\n    var name = _ref33.name,\n        directives = _ref33.directives;\n    return join(['extend scalar', name, join(directives, ' ')], ' ');\n  },\n  ObjectTypeExtension: function ObjectTypeExtension(_ref34) {\n    var name = _ref34.name,\n        interfaces = _ref34.interfaces,\n        directives = _ref34.directives,\n        fields = _ref34.fields;\n    return join(['extend type', name, wrap('implements ', join(interfaces, ' & ')), join(directives, ' '), block(fields)], ' ');\n  },\n  InterfaceTypeExtension: function InterfaceTypeExtension(_ref35) {\n    var name = _ref35.name,\n        directives = _ref35.directives,\n        fields = _ref35.fields;\n    return join(['extend interface', name, join(directives, ' '), block(fields)], ' ');\n  },\n  UnionTypeExtension: function UnionTypeExtension(_ref36) {\n    var name = _ref36.name,\n        directives = _ref36.directives,\n        types = _ref36.types;\n    return join(['extend union', name, join(directives, ' '), types && types.length !== 0 ? '= ' + join(types, ' | ') : ''], ' ');\n  },\n  EnumTypeExtension: function EnumTypeExtension(_ref37) {\n    var name = _ref37.name,\n        directives = _ref37.directives,\n        values = _ref37.values;\n    return join(['extend enum', name, join(directives, ' '), block(values)], ' ');\n  },\n  InputObjectTypeExtension: function InputObjectTypeExtension(_ref38) {\n    var name = _ref38.name,\n        directives = _ref38.directives,\n        fields = _ref38.fields;\n    return join(['extend input', name, join(directives, ' '), block(fields)], ' ');\n  }\n};\n\nfunction addDescription(cb) {\n  return function (node) {\n    return join([node.description, cb(node)], '\\n');\n  };\n}\n/**\n * Given maybeArray, print an empty string if it is null or empty, otherwise\n * print all items together separated by separator if provided\n */\n\n\nfunction join(maybeArray, separator) {\n  return maybeArray ? maybeArray.filter(function (x) {\n    return x;\n  }).join(separator || '') : '';\n}\n/**\n * Given array, print each item on its own line, wrapped in an\n * indented \"{ }\" block.\n */\n\n\nfunction block(array) {\n  return array && array.length !== 0 ? '{\\n' + indent(join(array, '\\n')) + '\\n}' : '';\n}\n/**\n * If maybeString is not null or empty, then wrap with start and end, otherwise\n * print an empty string.\n */\n\n\nfunction wrap(start, maybeString, end) {\n  return maybeString ? start + maybeString + (end || '') : '';\n}\n\nfunction indent(maybeString) {\n  return maybeString && '  ' + maybeString.replace(/\\n/g, '\\n  ');\n}\n/**\n * Print a block string in the indented block form by adding a leading and\n * trailing blank line. However, if a block string starts with whitespace and is\n * a single-line, adding a leading blank line would strip that whitespace.\n */\n\n\nfunction printBlockString(value, isDescription) {\n  var escaped = value.replace(/\"\"\"/g, '\\\\\"\"\"');\n  return (value[0] === ' ' || value[0] === '\\t') && value.indexOf('\\n') === -1 ? \"\\\"\\\"\\\"\".concat(escaped.replace(/\"$/, '\"\\n'), \"\\\"\\\"\\\"\") : \"\\\"\\\"\\\"\\n\".concat(isDescription ? escaped : indent(escaped), \"\\n\\\"\\\"\\\"\");\n}","/**\n * Copyright (c) 2015-present, Facebook, Inc.\n *\n * This source code is licensed under the MIT license found in the\n * LICENSE file in the root directory of this source tree.\n *\n *  strict\n */\n\n/**\n * Represents a location in a Source.\n */\n\n/**\n * Takes a Source and a UTF-8 character offset, and returns the corresponding\n * line and column as a SourceLocation.\n */\nexport function getLocation(source, position) {\n  var lineRegexp = /\\r\\n|[\\n\\r]/g;\n  var line = 1;\n  var column = position + 1;\n  var match;\n\n  while ((match = lineRegexp.exec(source.body)) && match.index < position) {\n    line += 1;\n    column = position + 1 - (match.index + match[0].length);\n  }\n\n  return {\n    line: line,\n    column: column\n  };\n}","/**\n * Copyright (c) 2015-present, Facebook, Inc.\n *\n * This source code is licensed under the MIT license found in the\n * LICENSE file in the root directory of this source tree.\n *\n *  strict\n */\nimport { getLocation } from '../language/location';\n\n/**\n * Prints a GraphQLError to a string, representing useful location information\n * about the error's position in the source.\n */\nexport function printError(error) {\n  var printedLocations = [];\n\n  if (error.nodes) {\n    var _iteratorNormalCompletion = true;\n    var _didIteratorError = false;\n    var _iteratorError = undefined;\n\n    try {\n      for (var _iterator = error.nodes[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) {\n        var node = _step.value;\n\n        if (node.loc) {\n          printedLocations.push(highlightSourceAtLocation(node.loc.source, getLocation(node.loc.source, node.loc.start)));\n        }\n      }\n    } catch (err) {\n      _didIteratorError = true;\n      _iteratorError = err;\n    } finally {\n      try {\n        if (!_iteratorNormalCompletion && _iterator.return != null) {\n          _iterator.return();\n        }\n      } finally {\n        if (_didIteratorError) {\n          throw _iteratorError;\n        }\n      }\n    }\n  } else if (error.source && error.locations) {\n    var source = error.source;\n    var _iteratorNormalCompletion2 = true;\n    var _didIteratorError2 = false;\n    var _iteratorError2 = undefined;\n\n    try {\n      for (var _iterator2 = error.locations[Symbol.iterator](), _step2; !(_iteratorNormalCompletion2 = (_step2 = _iterator2.next()).done); _iteratorNormalCompletion2 = true) {\n        var location = _step2.value;\n        printedLocations.push(highlightSourceAtLocation(source, location));\n      }\n    } catch (err) {\n      _didIteratorError2 = true;\n      _iteratorError2 = err;\n    } finally {\n      try {\n        if (!_iteratorNormalCompletion2 && _iterator2.return != null) {\n          _iterator2.return();\n        }\n      } finally {\n        if (_didIteratorError2) {\n          throw _iteratorError2;\n        }\n      }\n    }\n  }\n\n  return printedLocations.length === 0 ? error.message : [error.message].concat(printedLocations).join('\\n\\n') + '\\n';\n}\n/**\n * Render a helpful description of the location of the error in the GraphQL\n * Source document.\n */\n\nfunction highlightSourceAtLocation(source, location) {\n  var firstLineColumnOffset = source.locationOffset.column - 1;\n  var body = whitespace(firstLineColumnOffset) + source.body;\n  var lineIndex = location.line - 1;\n  var lineOffset = source.locationOffset.line - 1;\n  var lineNum = location.line + lineOffset;\n  var columnOffset = location.line === 1 ? firstLineColumnOffset : 0;\n  var columnNum = location.column + columnOffset;\n  var lines = body.split(/\\r\\n|[\\n\\r]/g);\n  return \"\".concat(source.name, \" (\").concat(lineNum, \":\").concat(columnNum, \")\\n\") + printPrefixedLines([// Lines specified like this: [\"prefix\", \"string\"],\n  [\"\".concat(lineNum - 1, \": \"), lines[lineIndex - 1]], [\"\".concat(lineNum, \": \"), lines[lineIndex]], ['', whitespace(columnNum - 1) + '^'], [\"\".concat(lineNum + 1, \": \"), lines[lineIndex + 1]]]);\n}\n\nfunction printPrefixedLines(lines) {\n  var existingLines = lines.filter(function (_ref) {\n    var _ = _ref[0],\n        line = _ref[1];\n    return line !== undefined;\n  });\n  var padLen = 0;\n  var _iteratorNormalCompletion3 = true;\n  var _didIteratorError3 = false;\n  var _iteratorError3 = undefined;\n\n  try {\n    for (var _iterator3 = existingLines[Symbol.iterator](), _step3; !(_iteratorNormalCompletion3 = (_step3 = _iterator3.next()).done); _iteratorNormalCompletion3 = true) {\n      var _ref4 = _step3.value;\n      var prefix = _ref4[0];\n      padLen = Math.max(padLen, prefix.length);\n    }\n  } catch (err) {\n    _didIteratorError3 = true;\n    _iteratorError3 = err;\n  } finally {\n    try {\n      if (!_iteratorNormalCompletion3 && _iterator3.return != null) {\n        _iterator3.return();\n      }\n    } finally {\n      if (_didIteratorError3) {\n        throw _iteratorError3;\n      }\n    }\n  }\n\n  return existingLines.map(function (_ref3) {\n    var prefix = _ref3[0],\n        line = _ref3[1];\n    return lpad(padLen, prefix) + line;\n  }).join('\\n');\n}\n\nfunction whitespace(len) {\n  return Array(len + 1).join(' ');\n}\n\nfunction lpad(len, str) {\n  return whitespace(len - str.length) + str;\n}","/**\n * Copyright (c) 2015-present, Facebook, Inc.\n *\n * This source code is licensed under the MIT license found in the\n * LICENSE file in the root directory of this source tree.\n *\n *  strict\n */\nimport { printError } from './printError';\nimport { getLocation } from '../language/location';\nexport function GraphQLError( // eslint-disable-line no-redeclare\nmessage, nodes, source, positions, path, originalError, extensions) {\n  // Compute list of blame nodes.\n  var _nodes = Array.isArray(nodes) ? nodes.length !== 0 ? nodes : undefined : nodes ? [nodes] : undefined; // Compute locations in the source for the given nodes/positions.\n\n\n  var _source = source;\n\n  if (!_source && _nodes) {\n    var node = _nodes[0];\n    _source = node && node.loc && node.loc.source;\n  }\n\n  var _positions = positions;\n\n  if (!_positions && _nodes) {\n    _positions = _nodes.reduce(function (list, node) {\n      if (node.loc) {\n        list.push(node.loc.start);\n      }\n\n      return list;\n    }, []);\n  }\n\n  if (_positions && _positions.length === 0) {\n    _positions = undefined;\n  }\n\n  var _locations;\n\n  if (positions && source) {\n    _locations = positions.map(function (pos) {\n      return getLocation(source, pos);\n    });\n  } else if (_nodes) {\n    _locations = _nodes.reduce(function (list, node) {\n      if (node.loc) {\n        list.push(getLocation(node.loc.source, node.loc.start));\n      }\n\n      return list;\n    }, []);\n  }\n\n  var _extensions = extensions || originalError && originalError.extensions;\n\n  Object.defineProperties(this, {\n    message: {\n      value: message,\n      // By being enumerable, JSON.stringify will include `message` in the\n      // resulting output. This ensures that the simplest possible GraphQL\n      // service adheres to the spec.\n      enumerable: true,\n      writable: true\n    },\n    locations: {\n      // Coercing falsey values to undefined ensures they will not be included\n      // in JSON.stringify() when not provided.\n      value: _locations || undefined,\n      // By being enumerable, JSON.stringify will include `locations` in the\n      // resulting output. This ensures that the simplest possible GraphQL\n      // service adheres to the spec.\n      enumerable: Boolean(_locations)\n    },\n    path: {\n      // Coercing falsey values to undefined ensures they will not be included\n      // in JSON.stringify() when not provided.\n      value: path || undefined,\n      // By being enumerable, JSON.stringify will include `path` in the\n      // resulting output. This ensures that the simplest possible GraphQL\n      // service adheres to the spec.\n      enumerable: Boolean(path)\n    },\n    nodes: {\n      value: _nodes || undefined\n    },\n    source: {\n      value: _source || undefined\n    },\n    positions: {\n      value: _positions || undefined\n    },\n    originalError: {\n      value: originalError\n    },\n    extensions: {\n      // Coercing falsey values to undefined ensures they will not be included\n      // in JSON.stringify() when not provided.\n      value: _extensions || undefined,\n      // By being enumerable, JSON.stringify will include `path` in the\n      // resulting output. This ensures that the simplest possible GraphQL\n      // service adheres to the spec.\n      enumerable: Boolean(_extensions)\n    }\n  }); // Include (non-enumerable) stack trace.\n\n  if (originalError && originalError.stack) {\n    Object.defineProperty(this, 'stack', {\n      value: originalError.stack,\n      writable: true,\n      configurable: true\n    });\n  } else if (Error.captureStackTrace) {\n    Error.captureStackTrace(this, GraphQLError);\n  } else {\n    Object.defineProperty(this, 'stack', {\n      value: Error().stack,\n      writable: true,\n      configurable: true\n    });\n  }\n}\nGraphQLError.prototype = Object.create(Error.prototype, {\n  constructor: {\n    value: GraphQLError\n  },\n  name: {\n    value: 'GraphQLError'\n  },\n  toString: {\n    value: function toString() {\n      return printError(this);\n    }\n  }\n});"],"sourceRoot":""}