source: trip-planner-front/node_modules/source-map-js/dist/source-map.js@ fa375fe

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                module.exports = factory();
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                define([], factory);
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                exports["sourceMap"] = factory();
        else
                root["sourceMap"] = factory();
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/* 0 */
/***/ (function(module, exports, __webpack_require__) {

        /*
         * Copyright 2009-2011 Mozilla Foundation and contributors
         * Licensed under the New BSD license. See LICENSE.txt or:
         * http://opensource.org/licenses/BSD-3-Clause
         */
        exports.SourceMapGenerator = __webpack_require__(1).SourceMapGenerator;
        exports.SourceMapConsumer = __webpack_require__(7).SourceMapConsumer;
        exports.SourceNode = __webpack_require__(10).SourceNode;


/***/ }),
/* 1 */
/***/ (function(module, exports, __webpack_require__) {

        /* -*- Mode: js; js-indent-level: 2; -*- */
        /*
         * Copyright 2011 Mozilla Foundation and contributors
         * Licensed under the New BSD license. See LICENSE or:
         * http://opensource.org/licenses/BSD-3-Clause
         */

        var base64VLQ = __webpack_require__(2);
        var util = __webpack_require__(4);
        var ArraySet = __webpack_require__(5).ArraySet;
        var MappingList = __webpack_require__(6).MappingList;

        /**
         * An instance of the SourceMapGenerator represents a source map which is
         * being built incrementally. You may pass an object with the following
         * properties:
         *
         *   - file: The filename of the generated source.
         *   - sourceRoot: A root for all relative URLs in this source map.
         */
        function SourceMapGenerator(aArgs) {
          if (!aArgs) {
            aArgs = {};
          }
          this._file = util.getArg(aArgs, 'file', null);
          this._sourceRoot = util.getArg(aArgs, 'sourceRoot', null);
          this._skipValidation = util.getArg(aArgs, 'skipValidation', false);
          this._sources = new ArraySet();
          this._names = new ArraySet();
          this._mappings = new MappingList();
          this._sourcesContents = null;
        }

        SourceMapGenerator.prototype._version = 3;

        /**
         * Creates a new SourceMapGenerator based on a SourceMapConsumer
         *
         * @param aSourceMapConsumer The SourceMap.
         */
        SourceMapGenerator.fromSourceMap =
          function SourceMapGenerator_fromSourceMap(aSourceMapConsumer) {
            var sourceRoot = aSourceMapConsumer.sourceRoot;
            var generator = new SourceMapGenerator({
              file: aSourceMapConsumer.file,
              sourceRoot: sourceRoot
            });
            aSourceMapConsumer.eachMapping(function (mapping) {
              var newMapping = {
                generated: {
                  line: mapping.generatedLine,
                  column: mapping.generatedColumn
                }
              };

              if (mapping.source != null) {
                newMapping.source = mapping.source;
                if (sourceRoot != null) {
                  newMapping.source = util.relative(sourceRoot, newMapping.source);
                }

                newMapping.original = {
                  line: mapping.originalLine,
                  column: mapping.originalColumn
                };

                if (mapping.name != null) {
                  newMapping.name = mapping.name;
                }
              }

              generator.addMapping(newMapping);
            });
            aSourceMapConsumer.sources.forEach(function (sourceFile) {
              var sourceRelative = sourceFile;
              if (sourceRoot !== null) {
                sourceRelative = util.relative(sourceRoot, sourceFile);
              }

              if (!generator._sources.has(sourceRelative)) {
                generator._sources.add(sourceRelative);
              }

              var content = aSourceMapConsumer.sourceContentFor(sourceFile);
              if (content != null) {
                generator.setSourceContent(sourceFile, content);
              }
            });
            return generator;
          };

        /**
         * Add a single mapping from original source line and column to the generated
         * source's line and column for this source map being created. The mapping
         * object should have the following properties:
         *
         *   - generated: An object with the generated line and column positions.
         *   - original: An object with the original line and column positions.
         *   - source: The original source file (relative to the sourceRoot).
         *   - name: An optional original token name for this mapping.
         */
        SourceMapGenerator.prototype.addMapping =
          function SourceMapGenerator_addMapping(aArgs) {
            var generated = util.getArg(aArgs, 'generated');
            var original = util.getArg(aArgs, 'original', null);
            var source = util.getArg(aArgs, 'source', null);
            var name = util.getArg(aArgs, 'name', null);

            if (!this._skipValidation) {
              this._validateMapping(generated, original, source, name);
            }

            if (source != null) {
              source = String(source);
              if (!this._sources.has(source)) {
                this._sources.add(source);
              }
            }

            if (name != null) {
              name = String(name);
              if (!this._names.has(name)) {
                this._names.add(name);
              }
            }

            this._mappings.add({
              generatedLine: generated.line,
              generatedColumn: generated.column,
              originalLine: original != null && original.line,
              originalColumn: original != null && original.column,
              source: source,
              name: name
            });
          };

        /**
         * Set the source content for a source file.
         */
        SourceMapGenerator.prototype.setSourceContent =
          function SourceMapGenerator_setSourceContent(aSourceFile, aSourceContent) {
            var source = aSourceFile;
            if (this._sourceRoot != null) {
              source = util.relative(this._sourceRoot, source);
            }

            if (aSourceContent != null) {
              // Add the source content to the _sourcesContents map.
              // Create a new _sourcesContents map if the property is null.
              if (!this._sourcesContents) {
                this._sourcesContents = Object.create(null);
              }
              this._sourcesContents[util.toSetString(source)] = aSourceContent;
            } else if (this._sourcesContents) {
              // Remove the source file from the _sourcesContents map.
              // If the _sourcesContents map is empty, set the property to null.
              delete this._sourcesContents[util.toSetString(source)];
              if (Object.keys(this._sourcesContents).length === 0) {
                this._sourcesContents = null;
              }
            }
          };

        /**
         * Applies the mappings of a sub-source-map for a specific source file to the
         * source map being generated. Each mapping to the supplied source file is
         * rewritten using the supplied source map. Note: The resolution for the
         * resulting mappings is the minimium of this map and the supplied map.
         *
         * @param aSourceMapConsumer The source map to be applied.
         * @param aSourceFile Optional. The filename of the source file.
         *        If omitted, SourceMapConsumer's file property will be used.
         * @param aSourceMapPath Optional. The dirname of the path to the source map
         *        to be applied. If relative, it is relative to the SourceMapConsumer.
         *        This parameter is needed when the two source maps aren't in the same
         *        directory, and the source map to be applied contains relative source
         *        paths. If so, those relative source paths need to be rewritten
         *        relative to the SourceMapGenerator.
         */
        SourceMapGenerator.prototype.applySourceMap =
          function SourceMapGenerator_applySourceMap(aSourceMapConsumer, aSourceFile, aSourceMapPath) {
            var sourceFile = aSourceFile;
            // If aSourceFile is omitted, we will use the file property of the SourceMap
            if (aSourceFile == null) {
              if (aSourceMapConsumer.file == null) {
                throw new Error(
                  'SourceMapGenerator.prototype.applySourceMap requires either an explicit source file, ' +
                  'or the source map\'s "file" property. Both were omitted.'
                );
              }
              sourceFile = aSourceMapConsumer.file;
            }
            var sourceRoot = this._sourceRoot;
            // Make "sourceFile" relative if an absolute Url is passed.
            if (sourceRoot != null) {
              sourceFile = util.relative(sourceRoot, sourceFile);
            }
            // Applying the SourceMap can add and remove items from the sources and
            // the names array.
            var newSources = new ArraySet();
            var newNames = new ArraySet();

            // Find mappings for the "sourceFile"
            this._mappings.unsortedForEach(function (mapping) {
              if (mapping.source === sourceFile && mapping.originalLine != null) {
                // Check if it can be mapped by the source map, then update the mapping.
                var original = aSourceMapConsumer.originalPositionFor({
                  line: mapping.originalLine,
                  column: mapping.originalColumn
                });
                if (original.source != null) {
                  // Copy mapping
                  mapping.source = original.source;
                  if (aSourceMapPath != null) {
                    mapping.source = util.join(aSourceMapPath, mapping.source)
                  }
                  if (sourceRoot != null) {
                    mapping.source = util.relative(sourceRoot, mapping.source);
                  }
                  mapping.originalLine = original.line;
                  mapping.originalColumn = original.column;
                  if (original.name != null) {
                    mapping.name = original.name;
                  }
                }
              }

              var source = mapping.source;
              if (source != null && !newSources.has(source)) {
                newSources.add(source);
              }

              var name = mapping.name;
              if (name != null && !newNames.has(name)) {
                newNames.add(name);
              }

            }, this);
            this._sources = newSources;
            this._names = newNames;

            // Copy sourcesContents of applied map.
            aSourceMapConsumer.sources.forEach(function (sourceFile) {
              var content = aSourceMapConsumer.sourceContentFor(sourceFile);
              if (content != null) {
                if (aSourceMapPath != null) {
                  sourceFile = util.join(aSourceMapPath, sourceFile);
                }
                if (sourceRoot != null) {
                  sourceFile = util.relative(sourceRoot, sourceFile);
                }
                this.setSourceContent(sourceFile, content);
              }
            }, this);
          };

        /**
         * A mapping can have one of the three levels of data:
         *
         *   1. Just the generated position.
         *   2. The Generated position, original position, and original source.
         *   3. Generated and original position, original source, as well as a name
         *      token.
         *
         * To maintain consistency, we validate that any new mapping being added falls
         * in to one of these categories.
         */
        SourceMapGenerator.prototype._validateMapping =
          function SourceMapGenerator_validateMapping(aGenerated, aOriginal, aSource,
                                                      aName) {
            // When aOriginal is truthy but has empty values for .line and .column,
            // it is most likely a programmer error. In this case we throw a very
            // specific error message to try to guide them the right way.
            // For example: https://github.com/Polymer/polymer-bundler/pull/519
            if (aOriginal && typeof aOriginal.line !== 'number' && typeof aOriginal.column !== 'number') {
                throw new Error(
                    'original.line and original.column are not numbers -- you probably meant to omit ' +
                    'the original mapping entirely and only map the generated position. If so, pass ' +
                    'null for the original mapping instead of an object with empty or null values.'
                );
            }

            if (aGenerated && 'line' in aGenerated && 'column' in aGenerated
                && aGenerated.line > 0 && aGenerated.column >= 0
                && !aOriginal && !aSource && !aName) {
              // Case 1.
              return;
            }
            else if (aGenerated && 'line' in aGenerated && 'column' in aGenerated
                     && aOriginal && 'line' in aOriginal && 'column' in aOriginal
                     && aGenerated.line > 0 && aGenerated.column >= 0
                     && aOriginal.line > 0 && aOriginal.column >= 0
                     && aSource) {
              // Cases 2 and 3.
              return;
            }
            else {
              throw new Error('Invalid mapping: ' + JSON.stringify({
                generated: aGenerated,
                source: aSource,
                original: aOriginal,
                name: aName
              }));
            }
          };

        /**
         * Serialize the accumulated mappings in to the stream of base 64 VLQs
         * specified by the source map format.
         */
        SourceMapGenerator.prototype._serializeMappings =
          function SourceMapGenerator_serializeMappings() {
            var previousGeneratedColumn = 0;
            var previousGeneratedLine = 1;
            var previousOriginalColumn = 0;
            var previousOriginalLine = 0;
            var previousName = 0;
            var previousSource = 0;
            var result = '';
            var next;
            var mapping;
            var nameIdx;
            var sourceIdx;

            var mappings = this._mappings.toArray();
            for (var i = 0, len = mappings.length; i < len; i++) {
              mapping = mappings[i];
              next = ''

              if (mapping.generatedLine !== previousGeneratedLine) {
                previousGeneratedColumn = 0;
                while (mapping.generatedLine !== previousGeneratedLine) {
                  next += ';';
                  previousGeneratedLine++;
                }
              }
              else {
                if (i > 0) {
                  if (!util.compareByGeneratedPositionsInflated(mapping, mappings[i - 1])) {
                    continue;
                  }
                  next += ',';
                }
              }

              next += base64VLQ.encode(mapping.generatedColumn
                                         - previousGeneratedColumn);
              previousGeneratedColumn = mapping.generatedColumn;

              if (mapping.source != null) {
                sourceIdx = this._sources.indexOf(mapping.source);
                next += base64VLQ.encode(sourceIdx - previousSource);
                previousSource = sourceIdx;

                // lines are stored 0-based in SourceMap spec version 3
                next += base64VLQ.encode(mapping.originalLine - 1
                                           - previousOriginalLine);
                previousOriginalLine = mapping.originalLine - 1;

                next += base64VLQ.encode(mapping.originalColumn
                                           - previousOriginalColumn);
                previousOriginalColumn = mapping.originalColumn;

                if (mapping.name != null) {
                  nameIdx = this._names.indexOf(mapping.name);
                  next += base64VLQ.encode(nameIdx - previousName);
                  previousName = nameIdx;
                }
              }

              result += next;
            }

            return result;
          };

        SourceMapGenerator.prototype._generateSourcesContent =
          function SourceMapGenerator_generateSourcesContent(aSources, aSourceRoot) {
            return aSources.map(function (source) {
              if (!this._sourcesContents) {
                return null;
              }
              if (aSourceRoot != null) {
                source = util.relative(aSourceRoot, source);
              }
              var key = util.toSetString(source);
              return Object.prototype.hasOwnProperty.call(this._sourcesContents, key)
                ? this._sourcesContents[key]
                : null;
            }, this);
          };

        /**
         * Externalize the source map.
         */
        SourceMapGenerator.prototype.toJSON =
          function SourceMapGenerator_toJSON() {
            var map = {
              version: this._version,
              sources: this._sources.toArray(),
              names: this._names.toArray(),
              mappings: this._serializeMappings()
            };
            if (this._file != null) {
              map.file = this._file;
            }
            if (this._sourceRoot != null) {
              map.sourceRoot = this._sourceRoot;
            }
            if (this._sourcesContents) {
              map.sourcesContent = this._generateSourcesContent(map.sources, map.sourceRoot);
            }

            return map;
          };

        /**
         * Render the source map being generated to a string.
         */
        SourceMapGenerator.prototype.toString =
          function SourceMapGenerator_toString() {
            return JSON.stringify(this.toJSON());
          };

        exports.SourceMapGenerator = SourceMapGenerator;


/***/ }),
/* 2 */
/***/ (function(module, exports, __webpack_require__) {

        /* -*- Mode: js; js-indent-level: 2; -*- */
        /*
         * Copyright 2011 Mozilla Foundation and contributors
         * Licensed under the New BSD license. See LICENSE or:
         * http://opensource.org/licenses/BSD-3-Clause
         *
         * Based on the Base 64 VLQ implementation in Closure Compiler:
         * https://code.google.com/p/closure-compiler/source/browse/trunk/src/com/google/debugging/sourcemap/Base64VLQ.java
         *
         * Copyright 2011 The Closure Compiler Authors. All rights reserved.
         * Redistribution and use in source and binary forms, with or without
         * modification, are permitted provided that the following conditions are
         * met:
         *
         *  * Redistributions of source code must retain the above copyright
         *    notice, this list of conditions and the following disclaimer.
         *  * Redistributions in binary form must reproduce the above
         *    copyright notice, this list of conditions and the following
         *    disclaimer in the documentation and/or other materials provided
         *    with the distribution.
         *  * Neither the name of Google Inc. nor the names of its
         *    contributors may be used to endorse or promote products derived
         *    from this software without specific prior written permission.
         *
         * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
         * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
         * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
         * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
         * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
         * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
         * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
         * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
         * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
         * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
         * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
         */

        var base64 = __webpack_require__(3);

        // A single base 64 digit can contain 6 bits of data. For the base 64 variable
        // length quantities we use in the source map spec, the first bit is the sign,
        // the next four bits are the actual value, and the 6th bit is the
        // continuation bit. The continuation bit tells us whether there are more
        // digits in this value following this digit.
        //
        //   Continuation
        //   |    Sign
        //   |    |
        //   V    V
        //   101011

        var VLQ_BASE_SHIFT = 5;

        // binary: 100000
        var VLQ_BASE = 1 << VLQ_BASE_SHIFT;

        // binary: 011111
        var VLQ_BASE_MASK = VLQ_BASE - 1;

        // binary: 100000
        var VLQ_CONTINUATION_BIT = VLQ_BASE;

        /**
         * Converts from a two-complement value to a value where the sign bit is
         * placed in the least significant bit.  For example, as decimals:
         *   1 becomes 2 (10 binary), -1 becomes 3 (11 binary)
         *   2 becomes 4 (100 binary), -2 becomes 5 (101 binary)
         */
        function toVLQSigned(aValue) {
          return aValue < 0
            ? ((-aValue) << 1) + 1
            : (aValue << 1) + 0;
        }

        /**
         * Converts to a two-complement value from a value where the sign bit is
         * placed in the least significant bit.  For example, as decimals:
         *   2 (10 binary) becomes 1, 3 (11 binary) becomes -1
         *   4 (100 binary) becomes 2, 5 (101 binary) becomes -2
         */
        function fromVLQSigned(aValue) {
          var isNegative = (aValue & 1) === 1;
          var shifted = aValue >> 1;
          return isNegative
            ? -shifted
            : shifted;
        }

        /**
         * Returns the base 64 VLQ encoded value.
         */
        exports.encode = function base64VLQ_encode(aValue) {
          var encoded = "";
          var digit;

          var vlq = toVLQSigned(aValue);

          do {
            digit = vlq & VLQ_BASE_MASK;
            vlq >>>= VLQ_BASE_SHIFT;
            if (vlq > 0) {
              // There are still more digits in this value, so we must make sure the
              // continuation bit is marked.
              digit |= VLQ_CONTINUATION_BIT;
            }
            encoded += base64.encode(digit);
          } while (vlq > 0);

          return encoded;
        };

        /**
         * Decodes the next base 64 VLQ value from the given string and returns the
         * value and the rest of the string via the out parameter.
         */
        exports.decode = function base64VLQ_decode(aStr, aIndex, aOutParam) {
          var strLen = aStr.length;
          var result = 0;
          var shift = 0;
          var continuation, digit;

          do {
            if (aIndex >= strLen) {
              throw new Error("Expected more digits in base 64 VLQ value.");
            }

            digit = base64.decode(aStr.charCodeAt(aIndex++));
            if (digit === -1) {
              throw new Error("Invalid base64 digit: " + aStr.charAt(aIndex - 1));
            }

            continuation = !!(digit & VLQ_CONTINUATION_BIT);
            digit &= VLQ_BASE_MASK;
            result = result + (digit << shift);
            shift += VLQ_BASE_SHIFT;
          } while (continuation);

          aOutParam.value = fromVLQSigned(result);
          aOutParam.rest = aIndex;
        };


/***/ }),
/* 3 */
/***/ (function(module, exports) {

        /* -*- Mode: js; js-indent-level: 2; -*- */
        /*
         * Copyright 2011 Mozilla Foundation and contributors
         * Licensed under the New BSD license. See LICENSE or:
         * http://opensource.org/licenses/BSD-3-Clause
         */

        var intToCharMap = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'.split('');

        /**
         * Encode an integer in the range of 0 to 63 to a single base 64 digit.
         */
        exports.encode = function (number) {
          if (0 <= number && number < intToCharMap.length) {
            return intToCharMap[number];
          }
          throw new TypeError("Must be between 0 and 63: " + number);
        };

        /**
         * Decode a single base 64 character code digit to an integer. Returns -1 on
         * failure.
         */
        exports.decode = function (charCode) {
          var bigA = 65;     // 'A'
          var bigZ = 90;     // 'Z'

          var littleA = 97;  // 'a'
          var littleZ = 122; // 'z'

          var zero = 48;     // '0'
          var nine = 57;     // '9'

          var plus = 43;     // '+'
          var slash = 47;    // '/'

          var littleOffset = 26;
          var numberOffset = 52;

          // 0 - 25: ABCDEFGHIJKLMNOPQRSTUVWXYZ
          if (bigA <= charCode && charCode <= bigZ) {
            return (charCode - bigA);
          }

          // 26 - 51: abcdefghijklmnopqrstuvwxyz
          if (littleA <= charCode && charCode <= littleZ) {
            return (charCode - littleA + littleOffset);
          }

          // 52 - 61: 0123456789
          if (zero <= charCode && charCode <= nine) {
            return (charCode - zero + numberOffset);
          }

          // 62: +
          if (charCode == plus) {
            return 62;
          }

          // 63: /
          if (charCode == slash) {
            return 63;
          }

          // Invalid base64 digit.
          return -1;
        };


/***/ }),
/* 4 */
/***/ (function(module, exports) {

        /* -*- Mode: js; js-indent-level: 2; -*- */
        /*
         * Copyright 2011 Mozilla Foundation and contributors
         * Licensed under the New BSD license. See LICENSE or:
         * http://opensource.org/licenses/BSD-3-Clause
         */

        /**
         * This is a helper function for getting values from parameter/options
         * objects.
         *
         * @param args The object we are extracting values from
         * @param name The name of the property we are getting.
         * @param defaultValue An optional value to return if the property is missing
         * from the object. If this is not specified and the property is missing, an
         * error will be thrown.
         */
        function getArg(aArgs, aName, aDefaultValue) {
          if (aName in aArgs) {
            return aArgs[aName];
          } else if (arguments.length === 3) {
            return aDefaultValue;
          } else {
            throw new Error('"' + aName + '" is a required argument.');
          }
        }
        exports.getArg = getArg;

        var urlRegexp = /^(?:([\w+\-.]+):)?\/\/(?:(\w+:\w+)@)?([\w.-]*)(?::(\d+))?(.*)$/;
        var dataUrlRegexp = /^data:.+\,.+$/;

        function urlParse(aUrl) {
          var match = aUrl.match(urlRegexp);
          if (!match) {
            return null;
          }
          return {
            scheme: match[1],
            auth: match[2],
            host: match[3],
            port: match[4],
            path: match[5]
          };
        }
        exports.urlParse = urlParse;

        function urlGenerate(aParsedUrl) {
          var url = '';
          if (aParsedUrl.scheme) {
            url += aParsedUrl.scheme + ':';
          }
          url += '//';
          if (aParsedUrl.auth) {
            url += aParsedUrl.auth + '@';
          }
          if (aParsedUrl.host) {
            url += aParsedUrl.host;
          }
          if (aParsedUrl.port) {
            url += ":" + aParsedUrl.port
          }
          if (aParsedUrl.path) {
            url += aParsedUrl.path;
          }
          return url;
        }
        exports.urlGenerate = urlGenerate;

        var MAX_CACHED_INPUTS = 32;

        /**
         * Takes some function `f(input) -> result` and returns a memoized version of
         * `f`.
         *
         * We keep at most `MAX_CACHED_INPUTS` memoized results of `f` alive. The
         * memoization is a dumb-simple, linear least-recently-used cache.
         */
        function lruMemoize(f) {
          var cache = [];

          return function(input) {
            for (var i = 0; i < cache.length; i++) {
              if (cache[i].input === input) {
                var temp = cache[0];
                cache[0] = cache[i];
                cache[i] = temp;
                return cache[0].result;
              }
            }

            var result = f(input);

            cache.unshift({
              input,
              result,
            });

            if (cache.length > MAX_CACHED_INPUTS) {
              cache.pop();
            }

            return result;
          };
        }

        /**
         * Normalizes a path, or the path portion of a URL:
         *
         * - Replaces consecutive slashes with one slash.
         * - Removes unnecessary '.' parts.
         * - Removes unnecessary '<dir>/..' parts.
         *
         * Based on code in the Node.js 'path' core module.
         *
         * @param aPath The path or url to normalize.
         */
        var normalize = lruMemoize(function normalize(aPath) {
          var path = aPath;
          var url = urlParse(aPath);
          if (url) {
            if (!url.path) {
              return aPath;
            }
            path = url.path;
          }
          var isAbsolute = exports.isAbsolute(path);
          // Split the path into parts between `/` characters. This is much faster than
          // using `.split(/\/+/g)`.
          var parts = [];
          var start = 0;
          var i = 0;
          while (true) {
            start = i;
            i = path.indexOf("/", start);
            if (i === -1) {
              parts.push(path.slice(start));
              break;
            } else {
              parts.push(path.slice(start, i));
              while (i < path.length && path[i] === "/") {
                i++;
              }
            }
          }

          for (var part, up = 0, i = parts.length - 1; i >= 0; i--) {
            part = parts[i];
            if (part === '.') {
              parts.splice(i, 1);
            } else if (part === '..') {
              up++;
            } else if (up > 0) {
              if (part === '') {
                // The first part is blank if the path is absolute. Trying to go
                // above the root is a no-op. Therefore we can remove all '..' parts
                // directly after the root.
                parts.splice(i + 1, up);
                up = 0;
              } else {
                parts.splice(i, 2);
                up--;
              }
            }
          }
          path = parts.join('/');

          if (path === '') {
            path = isAbsolute ? '/' : '.';
          }

          if (url) {
            url.path = path;
            return urlGenerate(url);
          }
          return path;
        });
        exports.normalize = normalize;

        /**
         * Joins two paths/URLs.
         *
         * @param aRoot The root path or URL.
         * @param aPath The path or URL to be joined with the root.
         *
         * - If aPath is a URL or a data URI, aPath is returned, unless aPath is a
         *   scheme-relative URL: Then the scheme of aRoot, if any, is prepended
         *   first.
         * - Otherwise aPath is a path. If aRoot is a URL, then its path portion
         *   is updated with the result and aRoot is returned. Otherwise the result
         *   is returned.
         *   - If aPath is absolute, the result is aPath.
         *   - Otherwise the two paths are joined with a slash.
         * - Joining for example 'http://' and 'www.example.com' is also supported.
         */
        function join(aRoot, aPath) {
          if (aRoot === "") {
            aRoot = ".";
          }
          if (aPath === "") {
            aPath = ".";
          }
          var aPathUrl = urlParse(aPath);
          var aRootUrl = urlParse(aRoot);
          if (aRootUrl) {
            aRoot = aRootUrl.path || '/';
          }

          // `join(foo, '//www.example.org')`
          if (aPathUrl && !aPathUrl.scheme) {
            if (aRootUrl) {
              aPathUrl.scheme = aRootUrl.scheme;
            }
            return urlGenerate(aPathUrl);
          }

          if (aPathUrl || aPath.match(dataUrlRegexp)) {
            return aPath;
          }

          // `join('http://', 'www.example.com')`
          if (aRootUrl && !aRootUrl.host && !aRootUrl.path) {
            aRootUrl.host = aPath;
            return urlGenerate(aRootUrl);
          }

          var joined = aPath.charAt(0) === '/'
            ? aPath
            : normalize(aRoot.replace(/\/+$/, '') + '/' + aPath);

          if (aRootUrl) {
            aRootUrl.path = joined;
            return urlGenerate(aRootUrl);
          }
          return joined;
        }
        exports.join = join;

        exports.isAbsolute = function (aPath) {
          return aPath.charAt(0) === '/' || urlRegexp.test(aPath);
        };

        /**
         * Make a path relative to a URL or another path.
         *
         * @param aRoot The root path or URL.
         * @param aPath The path or URL to be made relative to aRoot.
         */
        function relative(aRoot, aPath) {
          if (aRoot === "") {
            aRoot = ".";
          }

          aRoot = aRoot.replace(/\/$/, '');

          // It is possible for the path to be above the root. In this case, simply
          // checking whether the root is a prefix of the path won't work. Instead, we
          // need to remove components from the root one by one, until either we find
          // a prefix that fits, or we run out of components to remove.
          var level = 0;
          while (aPath.indexOf(aRoot + '/') !== 0) {
            var index = aRoot.lastIndexOf("/");
            if (index < 0) {
              return aPath;
            }

            // If the only part of the root that is left is the scheme (i.e. http://,
            // file:///, etc.), one or more slashes (/), or simply nothing at all, we
            // have exhausted all components, so the path is not relative to the root.
            aRoot = aRoot.slice(0, index);
            if (aRoot.match(/^([^\/]+:\/)?\/*$/)) {
              return aPath;
            }

            ++level;
          }

          // Make sure we add a "../" for each component we removed from the root.
          return Array(level + 1).join("../") + aPath.substr(aRoot.length + 1);
        }
        exports.relative = relative;

        var supportsNullProto = (function () {
          var obj = Object.create(null);
          return !('__proto__' in obj);
        }());

        function identity (s) {
          return s;
        }

        /**
         * Because behavior goes wacky when you set `__proto__` on objects, we
         * have to prefix all the strings in our set with an arbitrary character.
         *
         * See https://github.com/mozilla/source-map/pull/31 and
         * https://github.com/mozilla/source-map/issues/30
         *
         * @param String aStr
         */
        function toSetString(aStr) {
          if (isProtoString(aStr)) {
            return '$' + aStr;
          }

          return aStr;
        }
        exports.toSetString = supportsNullProto ? identity : toSetString;

        function fromSetString(aStr) {
          if (isProtoString(aStr)) {
            return aStr.slice(1);
          }

          return aStr;
        }
        exports.fromSetString = supportsNullProto ? identity : fromSetString;

        function isProtoString(s) {
          if (!s) {
            return false;
          }

          var length = s.length;

          if (length < 9 /* "__proto__".length */) {
            return false;
          }

          if (s.charCodeAt(length - 1) !== 95  /* '_' */ ||
              s.charCodeAt(length - 2) !== 95  /* '_' */ ||
              s.charCodeAt(length - 3) !== 111 /* 'o' */ ||
              s.charCodeAt(length - 4) !== 116 /* 't' */ ||
              s.charCodeAt(length - 5) !== 111 /* 'o' */ ||
              s.charCodeAt(length - 6) !== 114 /* 'r' */ ||
              s.charCodeAt(length - 7) !== 112 /* 'p' */ ||
              s.charCodeAt(length - 8) !== 95  /* '_' */ ||
              s.charCodeAt(length - 9) !== 95  /* '_' */) {
            return false;
          }

          for (var i = length - 10; i >= 0; i--) {
            if (s.charCodeAt(i) !== 36 /* '$' */) {
              return false;
            }
          }

          return true;
        }

        /**
         * Comparator between two mappings where the original positions are compared.
         *
         * Optionally pass in `true` as `onlyCompareGenerated` to consider two
         * mappings with the same original source/line/column, but different generated
         * line and column the same. Useful when searching for a mapping with a
         * stubbed out mapping.
         */
        function compareByOriginalPositions(mappingA, mappingB, onlyCompareOriginal) {
          var cmp = strcmp(mappingA.source, mappingB.source);
          if (cmp !== 0) {
            return cmp;
          }

          cmp = mappingA.originalLine - mappingB.originalLine;
          if (cmp !== 0) {
            return cmp;
          }

          cmp = mappingA.originalColumn - mappingB.originalColumn;
          if (cmp !== 0 || onlyCompareOriginal) {
            return cmp;
          }

          cmp = mappingA.generatedColumn - mappingB.generatedColumn;
          if (cmp !== 0) {
            return cmp;
          }

          cmp = mappingA.generatedLine - mappingB.generatedLine;
          if (cmp !== 0) {
            return cmp;
          }

          return strcmp(mappingA.name, mappingB.name);
        }
        exports.compareByOriginalPositions = compareByOriginalPositions;

        function compareByOriginalPositionsNoSource(mappingA, mappingB, onlyCompareOriginal) {
          var cmp

          cmp = mappingA.originalLine - mappingB.originalLine;
          if (cmp !== 0) {
            return cmp;
          }

          cmp = mappingA.originalColumn - mappingB.originalColumn;
          if (cmp !== 0 || onlyCompareOriginal) {
            return cmp;
          }

          cmp = mappingA.generatedColumn - mappingB.generatedColumn;
          if (cmp !== 0) {
            return cmp;
          }

          cmp = mappingA.generatedLine - mappingB.generatedLine;
          if (cmp !== 0) {
            return cmp;
          }

          return strcmp(mappingA.name, mappingB.name);
        }
        exports.compareByOriginalPositionsNoSource = compareByOriginalPositionsNoSource;

        /**
         * Comparator between two mappings with deflated source and name indices where
         * the generated positions are compared.
         *
         * Optionally pass in `true` as `onlyCompareGenerated` to consider two
         * mappings with the same generated line and column, but different
         * source/name/original line and column the same. Useful when searching for a
         * mapping with a stubbed out mapping.
         */
        function compareByGeneratedPositionsDeflated(mappingA, mappingB, onlyCompareGenerated) {
          var cmp = mappingA.generatedLine - mappingB.generatedLine;
          if (cmp !== 0) {
            return cmp;
          }

          cmp = mappingA.generatedColumn - mappingB.generatedColumn;
          if (cmp !== 0 || onlyCompareGenerated) {
            return cmp;
          }

          cmp = strcmp(mappingA.source, mappingB.source);
          if (cmp !== 0) {
            return cmp;
          }

          cmp = mappingA.originalLine - mappingB.originalLine;
          if (cmp !== 0) {
            return cmp;
          }

          cmp = mappingA.originalColumn - mappingB.originalColumn;
          if (cmp !== 0) {
            return cmp;
          }

          return strcmp(mappingA.name, mappingB.name);
        }
        exports.compareByGeneratedPositionsDeflated = compareByGeneratedPositionsDeflated;

        function compareByGeneratedPositionsDeflatedNoLine(mappingA, mappingB, onlyCompareGenerated) {
          var cmp = mappingA.generatedColumn - mappingB.generatedColumn;
          if (cmp !== 0 || onlyCompareGenerated) {
            return cmp;
          }

          cmp = strcmp(mappingA.source, mappingB.source);
          if (cmp !== 0) {
            return cmp;
          }

          cmp = mappingA.originalLine - mappingB.originalLine;
          if (cmp !== 0) {
            return cmp;
          }

          cmp = mappingA.originalColumn - mappingB.originalColumn;
          if (cmp !== 0) {
            return cmp;
          }

          return strcmp(mappingA.name, mappingB.name);
        }
        exports.compareByGeneratedPositionsDeflatedNoLine = compareByGeneratedPositionsDeflatedNoLine;

        function strcmp(aStr1, aStr2) {
          if (aStr1 === aStr2) {
            return 0;
          }

          if (aStr1 === null) {
            return 1; // aStr2 !== null
          }

          if (aStr2 === null) {
            return -1; // aStr1 !== null
          }

          if (aStr1 > aStr2) {
            return 1;
          }

          return -1;
        }

        /**
         * Comparator between two mappings with inflated source and name strings where
         * the generated positions are compared.
         */
        function compareByGeneratedPositionsInflated(mappingA, mappingB) {
          var cmp = mappingA.generatedLine - mappingB.generatedLine;
          if (cmp !== 0) {
            return cmp;
          }

          cmp = mappingA.generatedColumn - mappingB.generatedColumn;
          if (cmp !== 0) {
            return cmp;
          }

          cmp = strcmp(mappingA.source, mappingB.source);
          if (cmp !== 0) {
            return cmp;
          }

          cmp = mappingA.originalLine - mappingB.originalLine;
          if (cmp !== 0) {
            return cmp;
          }

          cmp = mappingA.originalColumn - mappingB.originalColumn;
          if (cmp !== 0) {
            return cmp;
          }

          return strcmp(mappingA.name, mappingB.name);
        }
        exports.compareByGeneratedPositionsInflated = compareByGeneratedPositionsInflated;

        /**
         * Strip any JSON XSSI avoidance prefix from the string (as documented
         * in the source maps specification), and then parse the string as
         * JSON.
         */
        function parseSourceMapInput(str) {
          return JSON.parse(str.replace(/^\)]}'[^\n]*\n/, ''));
        }
        exports.parseSourceMapInput = parseSourceMapInput;

        /**
         * Compute the URL of a source given the the source root, the source's
         * URL, and the source map's URL.
         */
        function computeSourceURL(sourceRoot, sourceURL, sourceMapURL) {
          sourceURL = sourceURL || '';

          if (sourceRoot) {
            // This follows what Chrome does.
            if (sourceRoot[sourceRoot.length - 1] !== '/' && sourceURL[0] !== '/') {
              sourceRoot += '/';
            }
            // The spec says:
            //   Line 4: An optional source root, useful for relocating source
            //   files on a server or removing repeated values in the
            //   “sources” entry.  This value is prepended to the individual
            //   entries in the “source” field.
            sourceURL = sourceRoot + sourceURL;
          }

          // Historically, SourceMapConsumer did not take the sourceMapURL as
          // a parameter.  This mode is still somewhat supported, which is why
          // this code block is conditional.  However, it's preferable to pass
          // the source map URL to SourceMapConsumer, so that this function
          // can implement the source URL resolution algorithm as outlined in
          // the spec.  This block is basically the equivalent of:
          //    new URL(sourceURL, sourceMapURL).toString()
          // ... except it avoids using URL, which wasn't available in the
          // older releases of node still supported by this library.
          //
          // The spec says:
          //   If the sources are not absolute URLs after prepending of the
          //   “sourceRoot”, the sources are resolved relative to the
          //   SourceMap (like resolving script src in a html document).
          if (sourceMapURL) {
            var parsed = urlParse(sourceMapURL);
            if (!parsed) {
              throw new Error("sourceMapURL could not be parsed");
            }
            if (parsed.path) {
              // Strip the last path component, but keep the "/".
              var index = parsed.path.lastIndexOf('/');
              if (index >= 0) {
                parsed.path = parsed.path.substring(0, index + 1);
              }
            }
            sourceURL = join(urlGenerate(parsed), sourceURL);
          }

          return normalize(sourceURL);
        }
        exports.computeSourceURL = computeSourceURL;


/***/ }),
/* 5 */
/***/ (function(module, exports, __webpack_require__) {

        /* -*- Mode: js; js-indent-level: 2; -*- */
        /*
         * Copyright 2011 Mozilla Foundation and contributors
         * Licensed under the New BSD license. See LICENSE or:
         * http://opensource.org/licenses/BSD-3-Clause
         */

        var util = __webpack_require__(4);
        var has = Object.prototype.hasOwnProperty;
        var hasNativeMap = typeof Map !== "undefined";

        /**
         * A data structure which is a combination of an array and a set. Adding a new
         * member is O(1), testing for membership is O(1), and finding the index of an
         * element is O(1). Removing elements from the set is not supported. Only
         * strings are supported for membership.
         */
        function ArraySet() {
          this._array = [];
          this._set = hasNativeMap ? new Map() : Object.create(null);
        }

        /**
         * Static method for creating ArraySet instances from an existing array.
         */
        ArraySet.fromArray = function ArraySet_fromArray(aArray, aAllowDuplicates) {
          var set = new ArraySet();
          for (var i = 0, len = aArray.length; i < len; i++) {
            set.add(aArray[i], aAllowDuplicates);
          }
          return set;
        };

        /**
         * Return how many unique items are in this ArraySet. If duplicates have been
         * added, than those do not count towards the size.
         *
         * @returns Number
         */
        ArraySet.prototype.size = function ArraySet_size() {
          return hasNativeMap ? this._set.size : Object.getOwnPropertyNames(this._set).length;
        };

        /**
         * Add the given string to this set.
         *
         * @param String aStr
         */
        ArraySet.prototype.add = function ArraySet_add(aStr, aAllowDuplicates) {
          var sStr = hasNativeMap ? aStr : util.toSetString(aStr);
          var isDuplicate = hasNativeMap ? this.has(aStr) : has.call(this._set, sStr);
          var idx = this._array.length;
          if (!isDuplicate || aAllowDuplicates) {
            this._array.push(aStr);
          }
          if (!isDuplicate) {
            if (hasNativeMap) {
              this._set.set(aStr, idx);
            } else {
              this._set[sStr] = idx;
            }
          }
        };

        /**
         * Is the given string a member of this set?
         *
         * @param String aStr
         */
        ArraySet.prototype.has = function ArraySet_has(aStr) {
          if (hasNativeMap) {
            return this._set.has(aStr);
          } else {
            var sStr = util.toSetString(aStr);
            return has.call(this._set, sStr);
          }
        };

        /**
         * What is the index of the given string in the array?
         *
         * @param String aStr
         */
        ArraySet.prototype.indexOf = function ArraySet_indexOf(aStr) {
          if (hasNativeMap) {
            var idx = this._set.get(aStr);
            if (idx >= 0) {
                return idx;
            }
          } else {
            var sStr = util.toSetString(aStr);
            if (has.call(this._set, sStr)) {
              return this._set[sStr];
            }
          }

          throw new Error('"' + aStr + '" is not in the set.');
        };

        /**
         * What is the element at the given index?
         *
         * @param Number aIdx
         */
        ArraySet.prototype.at = function ArraySet_at(aIdx) {
          if (aIdx >= 0 && aIdx < this._array.length) {
            return this._array[aIdx];
          }
          throw new Error('No element indexed by ' + aIdx);
        };

        /**
         * Returns the array representation of this set (which has the proper indices
         * indicated by indexOf). Note that this is a copy of the internal array used
         * for storing the members so that no one can mess with internal state.
         */
        ArraySet.prototype.toArray = function ArraySet_toArray() {
          return this._array.slice();
        };

        exports.ArraySet = ArraySet;


/***/ }),
/* 6 */
/***/ (function(module, exports, __webpack_require__) {

        /* -*- Mode: js; js-indent-level: 2; -*- */
        /*
         * Copyright 2014 Mozilla Foundation and contributors
         * Licensed under the New BSD license. See LICENSE or:
         * http://opensource.org/licenses/BSD-3-Clause
         */

        var util = __webpack_require__(4);

        /**
         * Determine whether mappingB is after mappingA with respect to generated
         * position.
         */
        function generatedPositionAfter(mappingA, mappingB) {
          // Optimized for most common case
          var lineA = mappingA.generatedLine;
          var lineB = mappingB.generatedLine;
          var columnA = mappingA.generatedColumn;
          var columnB = mappingB.generatedColumn;
          return lineB > lineA || lineB == lineA && columnB >= columnA ||
                 util.compareByGeneratedPositionsInflated(mappingA, mappingB) <= 0;
        }

        /**
         * A data structure to provide a sorted view of accumulated mappings in a
         * performance conscious manner. It trades a neglibable overhead in general
         * case for a large speedup in case of mappings being added in order.
         */
        function MappingList() {
          this._array = [];
          this._sorted = true;
          // Serves as infimum
          this._last = {generatedLine: -1, generatedColumn: 0};
        }

        /**
         * Iterate through internal items. This method takes the same arguments that
         * `Array.prototype.forEach` takes.
         *
         * NOTE: The order of the mappings is NOT guaranteed.
         */
        MappingList.prototype.unsortedForEach =
          function MappingList_forEach(aCallback, aThisArg) {
            this._array.forEach(aCallback, aThisArg);
          };

        /**
         * Add the given source mapping.
         *
         * @param Object aMapping
         */
        MappingList.prototype.add = function MappingList_add(aMapping) {
          if (generatedPositionAfter(this._last, aMapping)) {
            this._last = aMapping;
            this._array.push(aMapping);
          } else {
            this._sorted = false;
            this._array.push(aMapping);
          }
        };

        /**
         * Returns the flat, sorted array of mappings. The mappings are sorted by
         * generated position.
         *
         * WARNING: This method returns internal data without copying, for
         * performance. The return value must NOT be mutated, and should be treated as
         * an immutable borrow. If you want to take ownership, you must make your own
         * copy.
         */
        MappingList.prototype.toArray = function MappingList_toArray() {
          if (!this._sorted) {
            this._array.sort(util.compareByGeneratedPositionsInflated);
            this._sorted = true;
          }
          return this._array;
        };

        exports.MappingList = MappingList;


/***/ }),
/* 7 */
/***/ (function(module, exports, __webpack_require__) {

        /* -*- Mode: js; js-indent-level: 2; -*- */
        /*
         * Copyright 2011 Mozilla Foundation and contributors
         * Licensed under the New BSD license. See LICENSE or:
         * http://opensource.org/licenses/BSD-3-Clause
         */

        var util = __webpack_require__(4);
        var binarySearch = __webpack_require__(8);
        var ArraySet = __webpack_require__(5).ArraySet;
        var base64VLQ = __webpack_require__(2);
        var quickSort = __webpack_require__(9).quickSort;

        function SourceMapConsumer(aSourceMap, aSourceMapURL) {
          var sourceMap = aSourceMap;
          if (typeof aSourceMap === 'string') {
            sourceMap = util.parseSourceMapInput(aSourceMap);
          }

          return sourceMap.sections != null
            ? new IndexedSourceMapConsumer(sourceMap, aSourceMapURL)
            : new BasicSourceMapConsumer(sourceMap, aSourceMapURL);
        }

        SourceMapConsumer.fromSourceMap = function(aSourceMap, aSourceMapURL) {
          return BasicSourceMapConsumer.fromSourceMap(aSourceMap, aSourceMapURL);
        }

        /**
         * The version of the source mapping spec that we are consuming.
         */
        SourceMapConsumer.prototype._version = 3;

        // `__generatedMappings` and `__originalMappings` are arrays that hold the
        // parsed mapping coordinates from the source map's "mappings" attribute. They
        // are lazily instantiated, accessed via the `_generatedMappings` and
        // `_originalMappings` getters respectively, and we only parse the mappings
        // and create these arrays once queried for a source location. We jump through
        // these hoops because there can be many thousands of mappings, and parsing
        // them is expensive, so we only want to do it if we must.
        //
        // Each object in the arrays is of the form:
        //
        //     {
        //       generatedLine: The line number in the generated code,
        //       generatedColumn: The column number in the generated code,
        //       source: The path to the original source file that generated this
        //               chunk of code,
        //       originalLine: The line number in the original source that
        //                     corresponds to this chunk of generated code,
        //       originalColumn: The column number in the original source that
        //                       corresponds to this chunk of generated code,
        //       name: The name of the original symbol which generated this chunk of
        //             code.
        //     }
        //
        // All properties except for `generatedLine` and `generatedColumn` can be
        // `null`.
        //
        // `_generatedMappings` is ordered by the generated positions.
        //
        // `_originalMappings` is ordered by the original positions.

        SourceMapConsumer.prototype.__generatedMappings = null;
        Object.defineProperty(SourceMapConsumer.prototype, '_generatedMappings', {
          configurable: true,
          enumerable: true,
          get: function () {
            if (!this.__generatedMappings) {
              this._parseMappings(this._mappings, this.sourceRoot);
            }

            return this.__generatedMappings;
          }
        });

        SourceMapConsumer.prototype.__originalMappings = null;
        Object.defineProperty(SourceMapConsumer.prototype, '_originalMappings', {
          configurable: true,
          enumerable: true,
          get: function () {
            if (!this.__originalMappings) {
              this._parseMappings(this._mappings, this.sourceRoot);
            }

            return this.__originalMappings;
          }
        });

        SourceMapConsumer.prototype._charIsMappingSeparator =
          function SourceMapConsumer_charIsMappingSeparator(aStr, index) {
            var c = aStr.charAt(index);
            return c === ";" || c === ",";
          };

        /**
         * Parse the mappings in a string in to a data structure which we can easily
         * query (the ordered arrays in the `this.__generatedMappings` and
         * `this.__originalMappings` properties).
         */
        SourceMapConsumer.prototype._parseMappings =
          function SourceMapConsumer_parseMappings(aStr, aSourceRoot) {
            throw new Error("Subclasses must implement _parseMappings");
          };

        SourceMapConsumer.GENERATED_ORDER = 1;
        SourceMapConsumer.ORIGINAL_ORDER = 2;

        SourceMapConsumer.GREATEST_LOWER_BOUND = 1;
        SourceMapConsumer.LEAST_UPPER_BOUND = 2;

        /**
         * Iterate over each mapping between an original source/line/column and a
         * generated line/column in this source map.
         *
         * @param Function aCallback
         *        The function that is called with each mapping.
         * @param Object aContext
         *        Optional. If specified, this object will be the value of `this` every
         *        time that `aCallback` is called.
         * @param aOrder
         *        Either `SourceMapConsumer.GENERATED_ORDER` or
         *        `SourceMapConsumer.ORIGINAL_ORDER`. Specifies whether you want to
         *        iterate over the mappings sorted by the generated file's line/column
         *        order or the original's source/line/column order, respectively. Defaults to
         *        `SourceMapConsumer.GENERATED_ORDER`.
         */
        SourceMapConsumer.prototype.eachMapping =
          function SourceMapConsumer_eachMapping(aCallback, aContext, aOrder) {
            var context = aContext || null;
            var order = aOrder || SourceMapConsumer.GENERATED_ORDER;

            var mappings;
            switch (order) {
            case SourceMapConsumer.GENERATED_ORDER:
              mappings = this._generatedMappings;
              break;
            case SourceMapConsumer.ORIGINAL_ORDER:
              mappings = this._originalMappings;
              break;
            default:
              throw new Error("Unknown order of iteration.");
            }

            var sourceRoot = this.sourceRoot;
            mappings.map(function (mapping) {
              var source = mapping.source === null ? null : this._sources.at(mapping.source);
              source = util.computeSourceURL(sourceRoot, source, this._sourceMapURL);
              return {
                source: source,
                generatedLine: mapping.generatedLine,
                generatedColumn: mapping.generatedColumn,
                originalLine: mapping.originalLine,
                originalColumn: mapping.originalColumn,
                name: mapping.name === null ? null : this._names.at(mapping.name)
              };
            }, this).forEach(aCallback, context);
          };

        /**
         * Returns all generated line and column information for the original source,
         * line, and column provided. If no column is provided, returns all mappings
         * corresponding to a either the line we are searching for or the next
         * closest line that has any mappings. Otherwise, returns all mappings
         * corresponding to the given line and either the column we are searching for
         * or the next closest column that has any offsets.
         *
         * The only argument is an object with the following properties:
         *
         *   - source: The filename of the original source.
         *   - line: The line number in the original source.  The line number is 1-based.
         *   - column: Optional. the column number in the original source.
         *    The column number is 0-based.
         *
         * and an array of objects is returned, each with the following properties:
         *
         *   - line: The line number in the generated source, or null.  The
         *    line number is 1-based.
         *   - column: The column number in the generated source, or null.
         *    The column number is 0-based.
         */
        SourceMapConsumer.prototype.allGeneratedPositionsFor =
          function SourceMapConsumer_allGeneratedPositionsFor(aArgs) {
            var line = util.getArg(aArgs, 'line');

            // When there is no exact match, BasicSourceMapConsumer.prototype._findMapping
            // returns the index of the closest mapping less than the needle. By
            // setting needle.originalColumn to 0, we thus find the last mapping for
            // the given line, provided such a mapping exists.
            var needle = {
              source: util.getArg(aArgs, 'source'),
              originalLine: line,
              originalColumn: util.getArg(aArgs, 'column', 0)
            };

            needle.source = this._findSourceIndex(needle.source);
            if (needle.source < 0) {
              return [];
            }

            var mappings = [];

            var index = this._findMapping(needle,
                                          this._originalMappings,
                                          "originalLine",
                                          "originalColumn",
                                          util.compareByOriginalPositions,
                                          binarySearch.LEAST_UPPER_BOUND);
            if (index >= 0) {
              var mapping = this._originalMappings[index];

              if (aArgs.column === undefined) {
                var originalLine = mapping.originalLine;

                // Iterate until either we run out of mappings, or we run into
                // a mapping for a different line than the one we found. Since
                // mappings are sorted, this is guaranteed to find all mappings for
                // the line we found.
                while (mapping && mapping.originalLine === originalLine) {
                  mappings.push({
                    line: util.getArg(mapping, 'generatedLine', null),
                    column: util.getArg(mapping, 'generatedColumn', null),
                    lastColumn: util.getArg(mapping, 'lastGeneratedColumn', null)
                  });

                  mapping = this._originalMappings[++index];
                }
              } else {
                var originalColumn = mapping.originalColumn;

                // Iterate until either we run out of mappings, or we run into
                // a mapping for a different line than the one we were searching for.
                // Since mappings are sorted, this is guaranteed to find all mappings for
                // the line we are searching for.
                while (mapping &&
                       mapping.originalLine === line &&
                       mapping.originalColumn == originalColumn) {
                  mappings.push({
                    line: util.getArg(mapping, 'generatedLine', null),
                    column: util.getArg(mapping, 'generatedColumn', null),
                    lastColumn: util.getArg(mapping, 'lastGeneratedColumn', null)
                  });

                  mapping = this._originalMappings[++index];
                }
              }
            }

            return mappings;
          };

        exports.SourceMapConsumer = SourceMapConsumer;

        /**
         * A BasicSourceMapConsumer instance represents a parsed source map which we can
         * query for information about the original file positions by giving it a file
         * position in the generated source.
         *
         * The first parameter is the raw source map (either as a JSON string, or
         * already parsed to an object). According to the spec, source maps have the
         * following attributes:
         *
         *   - version: Which version of the source map spec this map is following.
         *   - sources: An array of URLs to the original source files.
         *   - names: An array of identifiers which can be referrenced by individual mappings.
         *   - sourceRoot: Optional. The URL root from which all sources are relative.
         *   - sourcesContent: Optional. An array of contents of the original source files.
         *   - mappings: A string of base64 VLQs which contain the actual mappings.
         *   - file: Optional. The generated file this source map is associated with.
         *
         * Here is an example source map, taken from the source map spec[0]:
         *
         *     {
         *       version : 3,
         *       file: "out.js",
         *       sourceRoot : "",
         *       sources: ["foo.js", "bar.js"],
         *       names: ["src", "maps", "are", "fun"],
         *       mappings: "AA,AB;;ABCDE;"
         *     }
         *
         * The second parameter, if given, is a string whose value is the URL
         * at which the source map was found.  This URL is used to compute the
         * sources array.
         *
         * [0]: https://docs.google.com/document/d/1U1RGAehQwRypUTovF1KRlpiOFze0b-_2gc6fAH0KY0k/edit?pli=1#
         */
        function BasicSourceMapConsumer(aSourceMap, aSourceMapURL) {
          var sourceMap = aSourceMap;
          if (typeof aSourceMap === 'string') {
            sourceMap = util.parseSourceMapInput(aSourceMap);
          }

          var version = util.getArg(sourceMap, 'version');
          var sources = util.getArg(sourceMap, 'sources');
          // Sass 3.3 leaves out the 'names' array, so we deviate from the spec (which
          // requires the array) to play nice here.
          var names = util.getArg(sourceMap, 'names', []);
          var sourceRoot = util.getArg(sourceMap, 'sourceRoot', null);
          var sourcesContent = util.getArg(sourceMap, 'sourcesContent', null);
          var mappings = util.getArg(sourceMap, 'mappings');
          var file = util.getArg(sourceMap, 'file', null);

          // Once again, Sass deviates from the spec and supplies the version as a
          // string rather than a number, so we use loose equality checking here.
          if (version != this._version) {
            throw new Error('Unsupported version: ' + version);
          }

          if (sourceRoot) {
            sourceRoot = util.normalize(sourceRoot);
          }

          sources = sources
            .map(String)
            // Some source maps produce relative source paths like "./foo.js" instead of
            // "foo.js".  Normalize these first so that future comparisons will succeed.
            // See bugzil.la/1090768.
            .map(util.normalize)
            // Always ensure that absolute sources are internally stored relative to
            // the source root, if the source root is absolute. Not doing this would
            // be particularly problematic when the source root is a prefix of the
            // source (valid, but why??). See github issue #199 and bugzil.la/1188982.
            .map(function (source) {
              return sourceRoot && util.isAbsolute(sourceRoot) && util.isAbsolute(source)
                ? util.relative(sourceRoot, source)
                : source;
            });

          // Pass `true` below to allow duplicate names and sources. While source maps
          // are intended to be compressed and deduplicated, the TypeScript compiler
          // sometimes generates source maps with duplicates in them. See Github issue
          // #72 and bugzil.la/889492.
          this._names = ArraySet.fromArray(names.map(String), true);
          this._sources = ArraySet.fromArray(sources, true);

          this._absoluteSources = this._sources.toArray().map(function (s) {
            return util.computeSourceURL(sourceRoot, s, aSourceMapURL);
          });

          this.sourceRoot = sourceRoot;
          this.sourcesContent = sourcesContent;
          this._mappings = mappings;
          this._sourceMapURL = aSourceMapURL;
          this.file = file;
        }

        BasicSourceMapConsumer.prototype = Object.create(SourceMapConsumer.prototype);
        BasicSourceMapConsumer.prototype.consumer = SourceMapConsumer;

        /**
         * Utility function to find the index of a source.  Returns -1 if not
         * found.
         */
        BasicSourceMapConsumer.prototype._findSourceIndex = function(aSource) {
          var relativeSource = aSource;
          if (this.sourceRoot != null) {
            relativeSource = util.relative(this.sourceRoot, relativeSource);
          }

          if (this._sources.has(relativeSource)) {
            return this._sources.indexOf(relativeSource);
          }

          // Maybe aSource is an absolute URL as returned by |sources|.  In
          // this case we can't simply undo the transform.
          var i;
          for (i = 0; i < this._absoluteSources.length; ++i) {
            if (this._absoluteSources[i] == aSource) {
              return i;
            }
          }

          return -1;
        };

        /**
         * Create a BasicSourceMapConsumer from a SourceMapGenerator.
         *
         * @param SourceMapGenerator aSourceMap
         *        The source map that will be consumed.
         * @param String aSourceMapURL
         *        The URL at which the source map can be found (optional)
         * @returns BasicSourceMapConsumer
         */
        BasicSourceMapConsumer.fromSourceMap =
          function SourceMapConsumer_fromSourceMap(aSourceMap, aSourceMapURL) {
            var smc = Object.create(BasicSourceMapConsumer.prototype);

            var names = smc._names = ArraySet.fromArray(aSourceMap._names.toArray(), true);
            var sources = smc._sources = ArraySet.fromArray(aSourceMap._sources.toArray(), true);
            smc.sourceRoot = aSourceMap._sourceRoot;
            smc.sourcesContent = aSourceMap._generateSourcesContent(smc._sources.toArray(),
                                                                    smc.sourceRoot);
            smc.file = aSourceMap._file;
            smc._sourceMapURL = aSourceMapURL;
            smc._absoluteSources = smc._sources.toArray().map(function (s) {
              return util.computeSourceURL(smc.sourceRoot, s, aSourceMapURL);
            });

            // Because we are modifying the entries (by converting string sources and
            // names to indices into the sources and names ArraySets), we have to make
            // a copy of the entry or else bad things happen. Shared mutable state
            // strikes again! See github issue #191.

            var generatedMappings = aSourceMap._mappings.toArray().slice();
            var destGeneratedMappings = smc.__generatedMappings = [];
            var destOriginalMappings = smc.__originalMappings = [];

            for (var i = 0, length = generatedMappings.length; i < length; i++) {
              var srcMapping = generatedMappings[i];
              var destMapping = new Mapping;
              destMapping.generatedLine = srcMapping.generatedLine;
              destMapping.generatedColumn = srcMapping.generatedColumn;

              if (srcMapping.source) {
                destMapping.source = sources.indexOf(srcMapping.source);
                destMapping.originalLine = srcMapping.originalLine;
                destMapping.originalColumn = srcMapping.originalColumn;

                if (srcMapping.name) {
                  destMapping.name = names.indexOf(srcMapping.name);
                }

                destOriginalMappings.push(destMapping);
              }

              destGeneratedMappings.push(destMapping);
            }

            quickSort(smc.__originalMappings, util.compareByOriginalPositions);

            return smc;
          };

        /**
         * The version of the source mapping spec that we are consuming.
         */
        BasicSourceMapConsumer.prototype._version = 3;

        /**
         * The list of original sources.
         */
        Object.defineProperty(BasicSourceMapConsumer.prototype, 'sources', {
          get: function () {
            return this._absoluteSources.slice();
          }
        });

        /**
         * Provide the JIT with a nice shape / hidden class.
         */
        function Mapping() {
          this.generatedLine = 0;
          this.generatedColumn = 0;
          this.source = null;
          this.originalLine = null;
          this.originalColumn = null;
          this.name = null;
        }

        /**
         * Parse the mappings in a string in to a data structure which we can easily
         * query (the ordered arrays in the `this.__generatedMappings` and
         * `this.__originalMappings` properties).
         */

        const compareGenerated = util.compareByGeneratedPositionsDeflatedNoLine;
        function sortGenerated(array, start) {
          let l = array.length;
          let n = array.length - start;
          if (n <= 1) {
            return;
          } else if (n == 2) {
            let a = array[start];
            let b = array[start + 1];
            if (compareGenerated(a, b) > 0) {
              array[start] = b;
              array[start + 1] = a;
            }
          } else if (n < 20) {
            for (let i = start; i < l; i++) {
              for (let j = i; j > start; j--) {
                let a = array[j - 1];
                let b = array[j];
                if (compareGenerated(a, b) <= 0) {
                  break;
                }
                array[j - 1] = b;
                array[j] = a;
              }
            }
          } else {
            quickSort(array, compareGenerated, start);
          }
        }
        BasicSourceMapConsumer.prototype._parseMappings =
          function SourceMapConsumer_parseMappings(aStr, aSourceRoot) {
            var generatedLine = 1;
            var previousGeneratedColumn = 0;
            var previousOriginalLine = 0;
            var previousOriginalColumn = 0;
            var previousSource = 0;
            var previousName = 0;
            var length = aStr.length;
            var index = 0;
            var cachedSegments = {};
            var temp = {};
            var originalMappings = [];
            var generatedMappings = [];
            var mapping, str, segment, end, value;

            let subarrayStart = 0;
            while (index < length) {
              if (aStr.charAt(index) === ';') {
                generatedLine++;
                index++;
                previousGeneratedColumn = 0;

                sortGenerated(generatedMappings, subarrayStart);
                subarrayStart = generatedMappings.length;
              }
              else if (aStr.charAt(index) === ',') {
                index++;
              }
              else {
                mapping = new Mapping();
                mapping.generatedLine = generatedLine;

                for (end = index; end < length; end++) {
                  if (this._charIsMappingSeparator(aStr, end)) {
                    break;
                  }
                }
                str = aStr.slice(index, end);

                segment = [];
                while (index < end) {
                  base64VLQ.decode(aStr, index, temp);
                  value = temp.value;
                  index = temp.rest;
                  segment.push(value);
                }

                if (segment.length === 2) {
                  throw new Error('Found a source, but no line and column');
                }

                if (segment.length === 3) {
                  throw new Error('Found a source and line, but no column');
                }

                // Generated column.
                mapping.generatedColumn = previousGeneratedColumn + segment[0];
                previousGeneratedColumn = mapping.generatedColumn;

                if (segment.length > 1) {
                  // Original source.
                  mapping.source = previousSource + segment[1];
                  previousSource += segment[1];

                  // Original line.
                  mapping.originalLine = previousOriginalLine + segment[2];
                  previousOriginalLine = mapping.originalLine;
                  // Lines are stored 0-based
                  mapping.originalLine += 1;

                  // Original column.
                  mapping.originalColumn = previousOriginalColumn + segment[3];
                  previousOriginalColumn = mapping.originalColumn;

                  if (segment.length > 4) {
                    // Original name.
                    mapping.name = previousName + segment[4];
                    previousName += segment[4];
                  }
                }

                generatedMappings.push(mapping);
                if (typeof mapping.originalLine === 'number') {
                  let currentSource = mapping.source;
                  while (originalMappings.length <= currentSource) {
                    originalMappings.push(null);
                  }
                  if (originalMappings[currentSource] === null) {
                    originalMappings[currentSource] = [];
                  }
                  originalMappings[currentSource].push(mapping);
                }
              }
            }

            sortGenerated(generatedMappings, subarrayStart);
            this.__generatedMappings = generatedMappings;

            for (var i = 0; i < originalMappings.length; i++) {
              if (originalMappings[i] != null) {
                quickSort(originalMappings[i], util.compareByOriginalPositionsNoSource);
              }
            }
            this.__originalMappings = [].concat(...originalMappings);
          };

        /**
         * Find the mapping that best matches the hypothetical "needle" mapping that
         * we are searching for in the given "haystack" of mappings.
         */
        BasicSourceMapConsumer.prototype._findMapping =
          function SourceMapConsumer_findMapping(aNeedle, aMappings, aLineName,
                                                 aColumnName, aComparator, aBias) {
            // To return the position we are searching for, we must first find the
            // mapping for the given position and then return the opposite position it
            // points to. Because the mappings are sorted, we can use binary search to
            // find the best mapping.

            if (aNeedle[aLineName] <= 0) {
              throw new TypeError('Line must be greater than or equal to 1, got '
                                  + aNeedle[aLineName]);
            }
            if (aNeedle[aColumnName] < 0) {
              throw new TypeError('Column must be greater than or equal to 0, got '
                                  + aNeedle[aColumnName]);
            }

            return binarySearch.search(aNeedle, aMappings, aComparator, aBias);
          };

        /**
         * Compute the last column for each generated mapping. The last column is
         * inclusive.
         */
        BasicSourceMapConsumer.prototype.computeColumnSpans =
          function SourceMapConsumer_computeColumnSpans() {
            for (var index = 0; index < this._generatedMappings.length; ++index) {
              var mapping = this._generatedMappings[index];

              // Mappings do not contain a field for the last generated columnt. We
              // can come up with an optimistic estimate, however, by assuming that
              // mappings are contiguous (i.e. given two consecutive mappings, the
              // first mapping ends where the second one starts).
              if (index + 1 < this._generatedMappings.length) {
                var nextMapping = this._generatedMappings[index + 1];

                if (mapping.generatedLine === nextMapping.generatedLine) {
                  mapping.lastGeneratedColumn = nextMapping.generatedColumn - 1;
                  continue;
                }
              }

              // The last mapping for each line spans the entire line.
              mapping.lastGeneratedColumn = Infinity;
            }
          };

        /**
         * Returns the original source, line, and column information for the generated
         * source's line and column positions provided. The only argument is an object
         * with the following properties:
         *
         *   - line: The line number in the generated source.  The line number
         *     is 1-based.
         *   - column: The column number in the generated source.  The column
         *     number is 0-based.
         *   - bias: Either 'SourceMapConsumer.GREATEST_LOWER_BOUND' or
         *     'SourceMapConsumer.LEAST_UPPER_BOUND'. Specifies whether to return the
         *     closest element that is smaller than or greater than the one we are
         *     searching for, respectively, if the exact element cannot be found.
         *     Defaults to 'SourceMapConsumer.GREATEST_LOWER_BOUND'.
         *
         * and an object is returned with the following properties:
         *
         *   - source: The original source file, or null.
         *   - line: The line number in the original source, or null.  The
         *     line number is 1-based.
         *   - column: The column number in the original source, or null.  The
         *     column number is 0-based.
         *   - name: The original identifier, or null.
         */
        BasicSourceMapConsumer.prototype.originalPositionFor =
          function SourceMapConsumer_originalPositionFor(aArgs) {
            var needle = {
              generatedLine: util.getArg(aArgs, 'line'),
              generatedColumn: util.getArg(aArgs, 'column')
            };

            var index = this._findMapping(
              needle,
              this._generatedMappings,
              "generatedLine",
              "generatedColumn",
              util.compareByGeneratedPositionsDeflated,
              util.getArg(aArgs, 'bias', SourceMapConsumer.GREATEST_LOWER_BOUND)
            );

            if (index >= 0) {
              var mapping = this._generatedMappings[index];

              if (mapping.generatedLine === needle.generatedLine) {
                var source = util.getArg(mapping, 'source', null);
                if (source !== null) {
                  source = this._sources.at(source);
                  source = util.computeSourceURL(this.sourceRoot, source, this._sourceMapURL);
                }
                var name = util.getArg(mapping, 'name', null);
                if (name !== null) {
                  name = this._names.at(name);
                }
                return {
                  source: source,
                  line: util.getArg(mapping, 'originalLine', null),
                  column: util.getArg(mapping, 'originalColumn', null),
                  name: name
                };
              }
            }

            return {
              source: null,
              line: null,
              column: null,
              name: null
            };
          };

        /**
         * Return true if we have the source content for every source in the source
         * map, false otherwise.
         */
        BasicSourceMapConsumer.prototype.hasContentsOfAllSources =
          function BasicSourceMapConsumer_hasContentsOfAllSources() {
            if (!this.sourcesContent) {
              return false;
            }
            return this.sourcesContent.length >= this._sources.size() &&
              !this.sourcesContent.some(function (sc) { return sc == null; });
          };

        /**
         * Returns the original source content. The only argument is the url of the
         * original source file. Returns null if no original source content is
         * available.
         */
        BasicSourceMapConsumer.prototype.sourceContentFor =
          function SourceMapConsumer_sourceContentFor(aSource, nullOnMissing) {
            if (!this.sourcesContent) {
              return null;
            }

            var index = this._findSourceIndex(aSource);
            if (index >= 0) {
              return this.sourcesContent[index];
            }

            var relativeSource = aSource;
            if (this.sourceRoot != null) {
              relativeSource = util.relative(this.sourceRoot, relativeSource);
            }

            var url;
            if (this.sourceRoot != null
                && (url = util.urlParse(this.sourceRoot))) {
              // XXX: file:// URIs and absolute paths lead to unexpected behavior for
              // many users. We can help them out when they expect file:// URIs to
              // behave like it would if they were running a local HTTP server. See
              // https://bugzilla.mozilla.org/show_bug.cgi?id=885597.
              var fileUriAbsPath = relativeSource.replace(/^file:\/\//, "");
              if (url.scheme == "file"
                  && this._sources.has(fileUriAbsPath)) {
                return this.sourcesContent[this._sources.indexOf(fileUriAbsPath)]
              }

              if ((!url.path || url.path == "/")
                  && this._sources.has("/" + relativeSource)) {
                return this.sourcesContent[this._sources.indexOf("/" + relativeSource)];
              }
            }

            // This function is used recursively from
            // IndexedSourceMapConsumer.prototype.sourceContentFor. In that case, we
            // don't want to throw if we can't find the source - we just want to
            // return null, so we provide a flag to exit gracefully.
            if (nullOnMissing) {
              return null;
            }
            else {
              throw new Error('"' + relativeSource + '" is not in the SourceMap.');
            }
          };

        /**
         * Returns the generated line and column information for the original source,
         * line, and column positions provided. The only argument is an object with
         * the following properties:
         *
         *   - source: The filename of the original source.
         *   - line: The line number in the original source.  The line number
         *     is 1-based.
         *   - column: The column number in the original source.  The column
         *     number is 0-based.
         *   - bias: Either 'SourceMapConsumer.GREATEST_LOWER_BOUND' or
         *     'SourceMapConsumer.LEAST_UPPER_BOUND'. Specifies whether to return the
         *     closest element that is smaller than or greater than the one we are
         *     searching for, respectively, if the exact element cannot be found.
         *     Defaults to 'SourceMapConsumer.GREATEST_LOWER_BOUND'.
         *
         * and an object is returned with the following properties:
         *
         *   - line: The line number in the generated source, or null.  The
         *     line number is 1-based.
         *   - column: The column number in the generated source, or null.
         *     The column number is 0-based.
         */
        BasicSourceMapConsumer.prototype.generatedPositionFor =
          function SourceMapConsumer_generatedPositionFor(aArgs) {
            var source = util.getArg(aArgs, 'source');
            source = this._findSourceIndex(source);
            if (source < 0) {
              return {
                line: null,
                column: null,
                lastColumn: null
              };
            }

            var needle = {
              source: source,
              originalLine: util.getArg(aArgs, 'line'),
              originalColumn: util.getArg(aArgs, 'column')
            };

            var index = this._findMapping(
              needle,
              this._originalMappings,
              "originalLine",
              "originalColumn",
              util.compareByOriginalPositions,
              util.getArg(aArgs, 'bias', SourceMapConsumer.GREATEST_LOWER_BOUND)
            );

            if (index >= 0) {
              var mapping = this._originalMappings[index];

              if (mapping.source === needle.source) {
                return {
                  line: util.getArg(mapping, 'generatedLine', null),
                  column: util.getArg(mapping, 'generatedColumn', null),
                  lastColumn: util.getArg(mapping, 'lastGeneratedColumn', null)
                };
              }
            }

            return {
              line: null,
              column: null,
              lastColumn: null
            };
          };

        exports.BasicSourceMapConsumer = BasicSourceMapConsumer;

        /**
         * An IndexedSourceMapConsumer instance represents a parsed source map which
         * we can query for information. It differs from BasicSourceMapConsumer in
         * that it takes "indexed" source maps (i.e. ones with a "sections" field) as
         * input.
         *
         * The first parameter is a raw source map (either as a JSON string, or already
         * parsed to an object). According to the spec for indexed source maps, they
         * have the following attributes:
         *
         *   - version: Which version of the source map spec this map is following.
         *   - file: Optional. The generated file this source map is associated with.
         *   - sections: A list of section definitions.
         *
         * Each value under the "sections" field has two fields:
         *   - offset: The offset into the original specified at which this section
         *       begins to apply, defined as an object with a "line" and "column"
         *       field.
         *   - map: A source map definition. This source map could also be indexed,
         *       but doesn't have to be.
         *
         * Instead of the "map" field, it's also possible to have a "url" field
         * specifying a URL to retrieve a source map from, but that's currently
         * unsupported.
         *
         * Here's an example source map, taken from the source map spec[0], but
         * modified to omit a section which uses the "url" field.
         *
         *  {
         *    version : 3,
         *    file: "app.js",
         *    sections: [{
         *      offset: {line:100, column:10},
         *      map: {
         *        version : 3,
         *        file: "section.js",
         *        sources: ["foo.js", "bar.js"],
         *        names: ["src", "maps", "are", "fun"],
         *        mappings: "AAAA,E;;ABCDE;"
         *      }
         *    }],
         *  }
         *
         * The second parameter, if given, is a string whose value is the URL
         * at which the source map was found.  This URL is used to compute the
         * sources array.
         *
         * [0]: https://docs.google.com/document/d/1U1RGAehQwRypUTovF1KRlpiOFze0b-_2gc6fAH0KY0k/edit#heading=h.535es3xeprgt
         */
        function IndexedSourceMapConsumer(aSourceMap, aSourceMapURL) {
          var sourceMap = aSourceMap;
          if (typeof aSourceMap === 'string') {
            sourceMap = util.parseSourceMapInput(aSourceMap);
          }

          var version = util.getArg(sourceMap, 'version');
          var sections = util.getArg(sourceMap, 'sections');

          if (version != this._version) {
            throw new Error('Unsupported version: ' + version);
          }

          this._sources = new ArraySet();
          this._names = new ArraySet();

          var lastOffset = {
            line: -1,
            column: 0
          };
          this._sections = sections.map(function (s) {
            if (s.url) {
              // The url field will require support for asynchronicity.
              // See https://github.com/mozilla/source-map/issues/16
              throw new Error('Support for url field in sections not implemented.');
            }
            var offset = util.getArg(s, 'offset');
            var offsetLine = util.getArg(offset, 'line');
            var offsetColumn = util.getArg(offset, 'column');

            if (offsetLine < lastOffset.line ||
                (offsetLine === lastOffset.line && offsetColumn < lastOffset.column)) {
              throw new Error('Section offsets must be ordered and non-overlapping.');
            }
            lastOffset = offset;

            return {
              generatedOffset: {
                // The offset fields are 0-based, but we use 1-based indices when
                // encoding/decoding from VLQ.
                generatedLine: offsetLine + 1,
                generatedColumn: offsetColumn + 1
              },
              consumer: new SourceMapConsumer(util.getArg(s, 'map'), aSourceMapURL)
            }
          });
        }

        IndexedSourceMapConsumer.prototype = Object.create(SourceMapConsumer.prototype);
        IndexedSourceMapConsumer.prototype.constructor = SourceMapConsumer;

        /**
         * The version of the source mapping spec that we are consuming.
         */
        IndexedSourceMapConsumer.prototype._version = 3;

        /**
         * The list of original sources.
         */
        Object.defineProperty(IndexedSourceMapConsumer.prototype, 'sources', {
          get: function () {
            var sources = [];
            for (var i = 0; i < this._sections.length; i++) {
              for (var j = 0; j < this._sections[i].consumer.sources.length; j++) {
                sources.push(this._sections[i].consumer.sources[j]);
              }
            }
            return sources;
          }
        });

        /**
         * Returns the original source, line, and column information for the generated
         * source's line and column positions provided. The only argument is an object
         * with the following properties:
         *
         *   - line: The line number in the generated source.  The line number
         *     is 1-based.
         *   - column: The column number in the generated source.  The column
         *     number is 0-based.
         *
         * and an object is returned with the following properties:
         *
         *   - source: The original source file, or null.
         *   - line: The line number in the original source, or null.  The
         *     line number is 1-based.
         *   - column: The column number in the original source, or null.  The
         *     column number is 0-based.
         *   - name: The original identifier, or null.
         */
        IndexedSourceMapConsumer.prototype.originalPositionFor =
          function IndexedSourceMapConsumer_originalPositionFor(aArgs) {
            var needle = {
              generatedLine: util.getArg(aArgs, 'line'),
              generatedColumn: util.getArg(aArgs, 'column')
            };

            // Find the section containing the generated position we're trying to map
            // to an original position.
            var sectionIndex = binarySearch.search(needle, this._sections,
              function(needle, section) {
                var cmp = needle.generatedLine - section.generatedOffset.generatedLine;
                if (cmp) {
                  return cmp;
                }

                return (needle.generatedColumn -
                        section.generatedOffset.generatedColumn);
              });
            var section = this._sections[sectionIndex];

            if (!section) {
              return {
                source: null,
                line: null,
                column: null,
                name: null
              };
            }

            return section.consumer.originalPositionFor({
              line: needle.generatedLine -
                (section.generatedOffset.generatedLine - 1),
              column: needle.generatedColumn -
                (section.generatedOffset.generatedLine === needle.generatedLine
                 ? section.generatedOffset.generatedColumn - 1
                 : 0),
              bias: aArgs.bias
            });
          };

        /**
         * Return true if we have the source content for every source in the source
         * map, false otherwise.
         */
        IndexedSourceMapConsumer.prototype.hasContentsOfAllSources =
          function IndexedSourceMapConsumer_hasContentsOfAllSources() {
            return this._sections.every(function (s) {
              return s.consumer.hasContentsOfAllSources();
            });
          };

        /**
         * Returns the original source content. The only argument is the url of the
         * original source file. Returns null if no original source content is
         * available.
         */
        IndexedSourceMapConsumer.prototype.sourceContentFor =
          function IndexedSourceMapConsumer_sourceContentFor(aSource, nullOnMissing) {
            for (var i = 0; i < this._sections.length; i++) {
              var section = this._sections[i];

              var content = section.consumer.sourceContentFor(aSource, true);
              if (content) {
                return content;
              }
            }
            if (nullOnMissing) {
              return null;
            }
            else {
              throw new Error('"' + aSource + '" is not in the SourceMap.');
            }
          };

        /**
         * Returns the generated line and column information for the original source,
         * line, and column positions provided. The only argument is an object with
         * the following properties:
         *
         *   - source: The filename of the original source.
         *   - line: The line number in the original source.  The line number
         *     is 1-based.
         *   - column: The column number in the original source.  The column
         *     number is 0-based.
         *
         * and an object is returned with the following properties:
         *
         *   - line: The line number in the generated source, or null.  The
         *     line number is 1-based. 
         *   - column: The column number in the generated source, or null.
         *     The column number is 0-based.
         */
        IndexedSourceMapConsumer.prototype.generatedPositionFor =
          function IndexedSourceMapConsumer_generatedPositionFor(aArgs) {
            for (var i = 0; i < this._sections.length; i++) {
              var section = this._sections[i];

              // Only consider this section if the requested source is in the list of
              // sources of the consumer.
              if (section.consumer._findSourceIndex(util.getArg(aArgs, 'source')) === -1) {
                continue;
              }
              var generatedPosition = section.consumer.generatedPositionFor(aArgs);
              if (generatedPosition) {
                var ret = {
                  line: generatedPosition.line +
                    (section.generatedOffset.generatedLine - 1),
                  column: generatedPosition.column +
                    (section.generatedOffset.generatedLine === generatedPosition.line
                     ? section.generatedOffset.generatedColumn - 1
                     : 0)
                };
                return ret;
              }
            }

            return {
              line: null,
              column: null
            };
          };

        /**
         * Parse the mappings in a string in to a data structure which we can easily
         * query (the ordered arrays in the `this.__generatedMappings` and
         * `this.__originalMappings` properties).
         */
        IndexedSourceMapConsumer.prototype._parseMappings =
          function IndexedSourceMapConsumer_parseMappings(aStr, aSourceRoot) {
            this.__generatedMappings = [];
            this.__originalMappings = [];
            for (var i = 0; i < this._sections.length; i++) {
              var section = this._sections[i];
              var sectionMappings = section.consumer._generatedMappings;
              for (var j = 0; j < sectionMappings.length; j++) {
                var mapping = sectionMappings[j];

                var source = section.consumer._sources.at(mapping.source);
                source = util.computeSourceURL(section.consumer.sourceRoot, source, this._sourceMapURL);
                this._sources.add(source);
                source = this._sources.indexOf(source);

                var name = null;
                if (mapping.name) {
                  name = section.consumer._names.at(mapping.name);
                  this._names.add(name);
                  name = this._names.indexOf(name);
                }

                // The mappings coming from the consumer for the section have
                // generated positions relative to the start of the section, so we
                // need to offset them to be relative to the start of the concatenated
                // generated file.
                var adjustedMapping = {
                  source: source,
                  generatedLine: mapping.generatedLine +
                    (section.generatedOffset.generatedLine - 1),
                  generatedColumn: mapping.generatedColumn +
                    (section.generatedOffset.generatedLine === mapping.generatedLine
                    ? section.generatedOffset.generatedColumn - 1
                    : 0),
                  originalLine: mapping.originalLine,
                  originalColumn: mapping.originalColumn,
                  name: name
                };

                this.__generatedMappings.push(adjustedMapping);
                if (typeof adjustedMapping.originalLine === 'number') {
                  this.__originalMappings.push(adjustedMapping);
                }
              }
            }

            quickSort(this.__generatedMappings, util.compareByGeneratedPositionsDeflated);
            quickSort(this.__originalMappings, util.compareByOriginalPositions);
          };

        exports.IndexedSourceMapConsumer = IndexedSourceMapConsumer;


/***/ }),
/* 8 */
/***/ (function(module, exports) {

        /* -*- Mode: js; js-indent-level: 2; -*- */
        /*
         * Copyright 2011 Mozilla Foundation and contributors
         * Licensed under the New BSD license. See LICENSE or:
         * http://opensource.org/licenses/BSD-3-Clause
         */

        exports.GREATEST_LOWER_BOUND = 1;
        exports.LEAST_UPPER_BOUND = 2;

        /**
         * Recursive implementation of binary search.
         *
         * @param aLow Indices here and lower do not contain the needle.
         * @param aHigh Indices here and higher do not contain the needle.
         * @param aNeedle The element being searched for.
         * @param aHaystack The non-empty array being searched.
         * @param aCompare Function which takes two elements and returns -1, 0, or 1.
         * @param aBias Either 'binarySearch.GREATEST_LOWER_BOUND' or
         *     'binarySearch.LEAST_UPPER_BOUND'. Specifies whether to return the
         *     closest element that is smaller than or greater than the one we are
         *     searching for, respectively, if the exact element cannot be found.
         */
        function recursiveSearch(aLow, aHigh, aNeedle, aHaystack, aCompare, aBias) {
          // This function terminates when one of the following is true:
          //
          //   1. We find the exact element we are looking for.
          //
          //   2. We did not find the exact element, but we can return the index of
          //      the next-closest element.
          //
          //   3. We did not find the exact element, and there is no next-closest
          //      element than the one we are searching for, so we return -1.
          var mid = Math.floor((aHigh - aLow) / 2) + aLow;
          var cmp = aCompare(aNeedle, aHaystack[mid], true);
          if (cmp === 0) {
            // Found the element we are looking for.
            return mid;
          }
          else if (cmp > 0) {
            // Our needle is greater than aHaystack[mid].
            if (aHigh - mid > 1) {
              // The element is in the upper half.
              return recursiveSearch(mid, aHigh, aNeedle, aHaystack, aCompare, aBias);
            }

            // The exact needle element was not found in this haystack. Determine if
            // we are in termination case (3) or (2) and return the appropriate thing.
            if (aBias == exports.LEAST_UPPER_BOUND) {
              return aHigh < aHaystack.length ? aHigh : -1;
            } else {
              return mid;
            }
          }
          else {
            // Our needle is less than aHaystack[mid].
            if (mid - aLow > 1) {
              // The element is in the lower half.
              return recursiveSearch(aLow, mid, aNeedle, aHaystack, aCompare, aBias);
            }

            // we are in termination case (3) or (2) and return the appropriate thing.
            if (aBias == exports.LEAST_UPPER_BOUND) {
              return mid;
            } else {
              return aLow < 0 ? -1 : aLow;
            }
          }
        }

        /**
         * This is an implementation of binary search which will always try and return
         * the index of the closest element if there is no exact hit. This is because
         * mappings between original and generated line/col pairs are single points,
         * and there is an implicit region between each of them, so a miss just means
         * that you aren't on the very start of a region.
         *
         * @param aNeedle The element you are looking for.
         * @param aHaystack The array that is being searched.
         * @param aCompare A function which takes the needle and an element in the
         *     array and returns -1, 0, or 1 depending on whether the needle is less
         *     than, equal to, or greater than the element, respectively.
         * @param aBias Either 'binarySearch.GREATEST_LOWER_BOUND' or
         *     'binarySearch.LEAST_UPPER_BOUND'. Specifies whether to return the
         *     closest element that is smaller than or greater than the one we are
         *     searching for, respectively, if the exact element cannot be found.
         *     Defaults to 'binarySearch.GREATEST_LOWER_BOUND'.
         */
        exports.search = function search(aNeedle, aHaystack, aCompare, aBias) {
          if (aHaystack.length === 0) {
            return -1;
          }

          var index = recursiveSearch(-1, aHaystack.length, aNeedle, aHaystack,
                                      aCompare, aBias || exports.GREATEST_LOWER_BOUND);
          if (index < 0) {
            return -1;
          }

          // We have found either the exact element, or the next-closest element than
          // the one we are searching for. However, there may be more than one such
          // element. Make sure we always return the smallest of these.
          while (index - 1 >= 0) {
            if (aCompare(aHaystack[index], aHaystack[index - 1], true) !== 0) {
              break;
            }
            --index;
          }

          return index;
        };


/***/ }),
/* 9 */
/***/ (function(module, exports) {

        /* -*- Mode: js; js-indent-level: 2; -*- */
        /*
         * Copyright 2011 Mozilla Foundation and contributors
         * Licensed under the New BSD license. See LICENSE or:
         * http://opensource.org/licenses/BSD-3-Clause
         */

        // It turns out that some (most?) JavaScript engines don't self-host
        // `Array.prototype.sort`. This makes sense because C++ will likely remain
        // faster than JS when doing raw CPU-intensive sorting. However, when using a
        // custom comparator function, calling back and forth between the VM's C++ and
        // JIT'd JS is rather slow *and* loses JIT type information, resulting in
        // worse generated code for the comparator function than would be optimal. In
        // fact, when sorting with a comparator, these costs outweigh the benefits of
        // sorting in C++. By using our own JS-implemented Quick Sort (below), we get
        // a ~3500ms mean speed-up in `bench/bench.html`.

        function SortTemplate(comparator) {

        /**
         * Swap the elements indexed by `x` and `y` in the array `ary`.
         *
         * @param {Array} ary
         *        The array.
         * @param {Number} x
         *        The index of the first item.
         * @param {Number} y
         *        The index of the second item.
         */
        function swap(ary, x, y) {
          var temp = ary[x];
          ary[x] = ary[y];
          ary[y] = temp;
        }

        /**
         * Returns a random integer within the range `low .. high` inclusive.
         *
         * @param {Number} low
         *        The lower bound on the range.
         * @param {Number} high
         *        The upper bound on the range.
         */
        function randomIntInRange(low, high) {
          return Math.round(low + (Math.random() * (high - low)));
        }

        /**
         * The Quick Sort algorithm.
         *
         * @param {Array} ary
         *        An array to sort.
         * @param {function} comparator
         *        Function to use to compare two items.
         * @param {Number} p
         *        Start index of the array
         * @param {Number} r
         *        End index of the array
         */
        function doQuickSort(ary, comparator, p, r) {
          // If our lower bound is less than our upper bound, we (1) partition the
          // array into two pieces and (2) recurse on each half. If it is not, this is
          // the empty array and our base case.

          if (p < r) {
            // (1) Partitioning.
            //
            // The partitioning chooses a pivot between `p` and `r` and moves all
            // elements that are less than or equal to the pivot to the before it, and
            // all the elements that are greater than it after it. The effect is that
            // once partition is done, the pivot is in the exact place it will be when
            // the array is put in sorted order, and it will not need to be moved
            // again. This runs in O(n) time.

            // Always choose a random pivot so that an input array which is reverse
            // sorted does not cause O(n^2) running time.
            var pivotIndex = randomIntInRange(p, r);
            var i = p - 1;

            swap(ary, pivotIndex, r);
            var pivot = ary[r];

            // Immediately after `j` is incremented in this loop, the following hold
            // true:
            //
            //   * Every element in `ary[p .. i]` is less than or equal to the pivot.
            //
            //   * Every element in `ary[i+1 .. j-1]` is greater than the pivot.
            for (var j = p; j < r; j++) {
              if (comparator(ary[j], pivot, false) <= 0) {
                i += 1;
                swap(ary, i, j);
              }
            }

            swap(ary, i + 1, j);
            var q = i + 1;

            // (2) Recurse on each half.

            doQuickSort(ary, comparator, p, q - 1);
            doQuickSort(ary, comparator, q + 1, r);
          }
        }

          return doQuickSort;
        }

        function cloneSort(comparator) {
          let template = SortTemplate.toString();
          let templateFn = new Function(`return ${template}`)();
          return templateFn(comparator);
        }

        /**
         * Sort the given array in-place with the given comparator function.
         *
         * @param {Array} ary
         *        An array to sort.
         * @param {function} comparator
         *        Function to use to compare two items.
         */

        let sortCache = new WeakMap();
        exports.quickSort = function (ary, comparator, start = 0) {
          let doQuickSort = sortCache.get(comparator);
          if (doQuickSort === void 0) {
            doQuickSort = cloneSort(comparator);
            sortCache.set(comparator, doQuickSort);
          }
          doQuickSort(ary, comparator, start, ary.length - 1);
        };


/***/ }),
/* 10 */
/***/ (function(module, exports, __webpack_require__) {

        /* -*- Mode: js; js-indent-level: 2; -*- */
        /*
         * Copyright 2011 Mozilla Foundation and contributors
         * Licensed under the New BSD license. See LICENSE or:
         * http://opensource.org/licenses/BSD-3-Clause
         */

        var SourceMapGenerator = __webpack_require__(1).SourceMapGenerator;
        var util = __webpack_require__(4);

        // Matches a Windows-style `\r\n` newline or a `\n` newline used by all other
        // operating systems these days (capturing the result).
        var REGEX_NEWLINE = /(\r?\n)/;

        // Newline character code for charCodeAt() comparisons
        var NEWLINE_CODE = 10;

        // Private symbol for identifying `SourceNode`s when multiple versions of
        // the source-map library are loaded. This MUST NOT CHANGE across
        // versions!
        var isSourceNode = "$$$isSourceNode$$$";

        /**
         * SourceNodes provide a way to abstract over interpolating/concatenating
         * snippets of generated JavaScript source code while maintaining the line and
         * column information associated with the original source code.
         *
         * @param aLine The original line number.
         * @param aColumn The original column number.
         * @param aSource The original source's filename.
         * @param aChunks Optional. An array of strings which are snippets of
         *        generated JS, or other SourceNodes.
         * @param aName The original identifier.
         */
        function SourceNode(aLine, aColumn, aSource, aChunks, aName) {
          this.children = [];
          this.sourceContents = {};
          this.line = aLine == null ? null : aLine;
          this.column = aColumn == null ? null : aColumn;
          this.source = aSource == null ? null : aSource;
          this.name = aName == null ? null : aName;
          this[isSourceNode] = true;
          if (aChunks != null) this.add(aChunks);
        }

        /**
         * Creates a SourceNode from generated code and a SourceMapConsumer.
         *
         * @param aGeneratedCode The generated code
         * @param aSourceMapConsumer The SourceMap for the generated code
         * @param aRelativePath Optional. The path that relative sources in the
         *        SourceMapConsumer should be relative to.
         */
        SourceNode.fromStringWithSourceMap =
          function SourceNode_fromStringWithSourceMap(aGeneratedCode, aSourceMapConsumer, aRelativePath) {
            // The SourceNode we want to fill with the generated code
            // and the SourceMap
            var node = new SourceNode();

            // All even indices of this array are one line of the generated code,
            // while all odd indices are the newlines between two adjacent lines
            // (since `REGEX_NEWLINE` captures its match).
            // Processed fragments are accessed by calling `shiftNextLine`.
            var remainingLines = aGeneratedCode.split(REGEX_NEWLINE);
            var remainingLinesIndex = 0;
            var shiftNextLine = function() {
              var lineContents = getNextLine();
              // The last line of a file might not have a newline.
              var newLine = getNextLine() || "";
              return lineContents + newLine;

              function getNextLine() {
                return remainingLinesIndex < remainingLines.length ?
                    remainingLines[remainingLinesIndex++] : undefined;
              }
            };

            // We need to remember the position of "remainingLines"
            var lastGeneratedLine = 1, lastGeneratedColumn = 0;

            // The generate SourceNodes we need a code range.
            // To extract it current and last mapping is used.
            // Here we store the last mapping.
            var lastMapping = null;

            aSourceMapConsumer.eachMapping(function (mapping) {
              if (lastMapping !== null) {
                // We add the code from "lastMapping" to "mapping":
                // First check if there is a new line in between.
                if (lastGeneratedLine < mapping.generatedLine) {
                  // Associate first line with "lastMapping"
                  addMappingWithCode(lastMapping, shiftNextLine());
                  lastGeneratedLine++;
                  lastGeneratedColumn = 0;
                  // The remaining code is added without mapping
                } else {
                  // There is no new line in between.
                  // Associate the code between "lastGeneratedColumn" and
                  // "mapping.generatedColumn" with "lastMapping"
                  var nextLine = remainingLines[remainingLinesIndex] || '';
                  var code = nextLine.substr(0, mapping.generatedColumn -
                                                lastGeneratedColumn);
                  remainingLines[remainingLinesIndex] = nextLine.substr(mapping.generatedColumn -
                                                      lastGeneratedColumn);
                  lastGeneratedColumn = mapping.generatedColumn;
                  addMappingWithCode(lastMapping, code);
                  // No more remaining code, continue
                  lastMapping = mapping;
                  return;
                }
              }
              // We add the generated code until the first mapping
              // to the SourceNode without any mapping.
              // Each line is added as separate string.
              while (lastGeneratedLine < mapping.generatedLine) {
                node.add(shiftNextLine());
                lastGeneratedLine++;
              }
              if (lastGeneratedColumn < mapping.generatedColumn) {
                var nextLine = remainingLines[remainingLinesIndex] || '';
                node.add(nextLine.substr(0, mapping.generatedColumn));
                remainingLines[remainingLinesIndex] = nextLine.substr(mapping.generatedColumn);
                lastGeneratedColumn = mapping.generatedColumn;
              }
              lastMapping = mapping;
            }, this);
            // We have processed all mappings.
            if (remainingLinesIndex < remainingLines.length) {
              if (lastMapping) {
                // Associate the remaining code in the current line with "lastMapping"
                addMappingWithCode(lastMapping, shiftNextLine());
              }
              // and add the remaining lines without any mapping
              node.add(remainingLines.splice(remainingLinesIndex).join(""));
            }

            // Copy sourcesContent into SourceNode
            aSourceMapConsumer.sources.forEach(function (sourceFile) {
              var content = aSourceMapConsumer.sourceContentFor(sourceFile);
              if (content != null) {
                if (aRelativePath != null) {
                  sourceFile = util.join(aRelativePath, sourceFile);
                }
                node.setSourceContent(sourceFile, content);
              }
            });

            return node;

            function addMappingWithCode(mapping, code) {
              if (mapping === null || mapping.source === undefined) {
                node.add(code);
              } else {
                var source = aRelativePath
                  ? util.join(aRelativePath, mapping.source)
                  : mapping.source;
                node.add(new SourceNode(mapping.originalLine,
                                        mapping.originalColumn,
                                        source,
                                        code,
                                        mapping.name));
              }
            }
          };

        /**
         * Add a chunk of generated JS to this source node.
         *
         * @param aChunk A string snippet of generated JS code, another instance of
         *        SourceNode, or an array where each member is one of those things.
         */
        SourceNode.prototype.add = function SourceNode_add(aChunk) {
          if (Array.isArray(aChunk)) {
            aChunk.forEach(function (chunk) {
              this.add(chunk);
            }, this);
          }
          else if (aChunk[isSourceNode] || typeof aChunk === "string") {
            if (aChunk) {
              this.children.push(aChunk);
            }
          }
          else {
            throw new TypeError(
              "Expected a SourceNode, string, or an array of SourceNodes and strings. Got " + aChunk
            );
          }
          return this;
        };

        /**
         * Add a chunk of generated JS to the beginning of this source node.
         *
         * @param aChunk A string snippet of generated JS code, another instance of
         *        SourceNode, or an array where each member is one of those things.
         */
        SourceNode.prototype.prepend = function SourceNode_prepend(aChunk) {
          if (Array.isArray(aChunk)) {
            for (var i = aChunk.length-1; i >= 0; i--) {
              this.prepend(aChunk[i]);
            }
          }
          else if (aChunk[isSourceNode] || typeof aChunk === "string") {
            this.children.unshift(aChunk);
          }
          else {
            throw new TypeError(
              "Expected a SourceNode, string, or an array of SourceNodes and strings. Got " + aChunk
            );
          }
          return this;
        };

        /**
         * Walk over the tree of JS snippets in this node and its children. The
         * walking function is called once for each snippet of JS and is passed that
         * snippet and the its original associated source's line/column location.
         *
         * @param aFn The traversal function.
         */
        SourceNode.prototype.walk = function SourceNode_walk(aFn) {
          var chunk;
          for (var i = 0, len = this.children.length; i < len; i++) {
            chunk = this.children[i];
            if (chunk[isSourceNode]) {
              chunk.walk(aFn);
            }
            else {
              if (chunk !== '') {
                aFn(chunk, { source: this.source,
                             line: this.line,
                             column: this.column,
                             name: this.name });
              }
            }
          }
        };

        /**
         * Like `String.prototype.join` except for SourceNodes. Inserts `aStr` between
         * each of `this.children`.
         *
         * @param aSep The separator.
         */
        SourceNode.prototype.join = function SourceNode_join(aSep) {
          var newChildren;
          var i;
          var len = this.children.length;
          if (len > 0) {
            newChildren = [];
            for (i = 0; i < len-1; i++) {
              newChildren.push(this.children[i]);
              newChildren.push(aSep);
            }
            newChildren.push(this.children[i]);
            this.children = newChildren;
          }
          return this;
        };

        /**
         * Call String.prototype.replace on the very right-most source snippet. Useful
         * for trimming whitespace from the end of a source node, etc.
         *
         * @param aPattern The pattern to replace.
         * @param aReplacement The thing to replace the pattern with.
         */
        SourceNode.prototype.replaceRight = function SourceNode_replaceRight(aPattern, aReplacement) {
          var lastChild = this.children[this.children.length - 1];
          if (lastChild[isSourceNode]) {
            lastChild.replaceRight(aPattern, aReplacement);
          }
          else if (typeof lastChild === 'string') {
            this.children[this.children.length - 1] = lastChild.replace(aPattern, aReplacement);
          }
          else {
            this.children.push(''.replace(aPattern, aReplacement));
          }
          return this;
        };

        /**
         * Set the source content for a source file. This will be added to the SourceMapGenerator
         * in the sourcesContent field.
         *
         * @param aSourceFile The filename of the source file
         * @param aSourceContent The content of the source file
         */
        SourceNode.prototype.setSourceContent =
          function SourceNode_setSourceContent(aSourceFile, aSourceContent) {
            this.sourceContents[util.toSetString(aSourceFile)] = aSourceContent;
          };

        /**
         * Walk over the tree of SourceNodes. The walking function is called for each
         * source file content and is passed the filename and source content.
         *
         * @param aFn The traversal function.
         */
        SourceNode.prototype.walkSourceContents =
          function SourceNode_walkSourceContents(aFn) {
            for (var i = 0, len = this.children.length; i < len; i++) {
              if (this.children[i][isSourceNode]) {
                this.children[i].walkSourceContents(aFn);
              }
            }

            var sources = Object.keys(this.sourceContents);
            for (var i = 0, len = sources.length; i < len; i++) {
              aFn(util.fromSetString(sources[i]), this.sourceContents[sources[i]]);
            }
          };

        /**
         * Return the string representation of this source node. Walks over the tree
         * and concatenates all the various snippets together to one string.
         */
        SourceNode.prototype.toString = function SourceNode_toString() {
          var str = "";
          this.walk(function (chunk) {
            str += chunk;
          });
          return str;
        };

        /**
         * Returns the string representation of this source node along with a source
         * map.
         */
        SourceNode.prototype.toStringWithSourceMap = function SourceNode_toStringWithSourceMap(aArgs) {
          var generated = {
            code: "",
            line: 1,
            column: 0
          };
          var map = new SourceMapGenerator(aArgs);
          var sourceMappingActive = false;
          var lastOriginalSource = null;
          var lastOriginalLine = null;
          var lastOriginalColumn = null;
          var lastOriginalName = null;
          this.walk(function (chunk, original) {
            generated.code += chunk;
            if (original.source !== null
                && original.line !== null
                && original.column !== null) {
              if(lastOriginalSource !== original.source
                 || lastOriginalLine !== original.line
                 || lastOriginalColumn !== original.column
                 || lastOriginalName !== original.name) {
                map.addMapping({
                  source: original.source,
                  original: {
                    line: original.line,
                    column: original.column
                  },
                  generated: {
                    line: generated.line,
                    column: generated.column
                  },
                  name: original.name
                });
              }
              lastOriginalSource = original.source;
              lastOriginalLine = original.line;
              lastOriginalColumn = original.column;
              lastOriginalName = original.name;
              sourceMappingActive = true;
            } else if (sourceMappingActive) {
              map.addMapping({
                generated: {
                  line: generated.line,
                  column: generated.column
                }
              });
              lastOriginalSource = null;
              sourceMappingActive = false;
            }
            for (var idx = 0, length = chunk.length; idx < length; idx++) {
              if (chunk.charCodeAt(idx) === NEWLINE_CODE) {
                generated.line++;
                generated.column = 0;
                // Mappings end at eol
                if (idx + 1 === length) {
                  lastOriginalSource = null;
                  sourceMappingActive = false;
                } else if (sourceMappingActive) {
                  map.addMapping({
                    source: original.source,
                    original: {
                      line: original.line,
                      column: original.column
                    },
                    generated: {
                      line: generated.line,
                      column: generated.column
                    },
                    name: original.name
                  });
                }
              } else {
                generated.column++;
              }
            }
          });
          this.walkSourceContents(function (sourceFile, sourceContent) {
            map.setSourceContent(sourceFile, sourceContent);
          });

          return { code: generated.code, map: map };
        };

        exports.SourceNode = SourceNode;


/***/ })
/******/ ])
});
;