1 files changed, 50 insertions, 49 deletions

diff --git a/node_modules/source-map/lib/mapping-list.js b/node_modules/source-map/lib/mapping-list.js
index 06d1274a..70568610 100644
--- a/node_modules/source-map/lib/mapping-list.js
+++ b/node_modules/source-map/lib/mapping-list.js
@@ -5,7 +5,7 @@
  * http://opensource.org/licenses/BSD-3-Clause
  */
 
-var util = require('./util');
+const util = require("./util");
 
 /**
  * Determine whether mappingB is after mappingA with respect to generated
@@ -13,67 +13,68 @@ var util = require('./util');
  */
 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;
+  const lineA = mappingA.generatedLine;
+  const lineB = mappingB.generatedLine;
+  const columnA = mappingA.generatedColumn;
+  const 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
+ * performance conscious manner. It trades a negligible 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};
-}
+class MappingList {
+  constructor() {
+    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) {
+  /**
+   * Iterate through internal items. This method takes the same arguments that
+   * `Array.prototype.forEach` takes.
+   *
+   * NOTE: The order of the mappings is NOT guaranteed.
+   */
+  unsortedForEach(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);
+  /**
+   * Add the given source mapping.
+   *
+   * @param Object aMapping
+   */
+  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;
+  /**
+   * 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.
+   */
+  toArray() {
+    if (!this._sorted) {
+      this._array.sort(util.compareByGeneratedPositionsInflated);
+      this._sorted = true;
+    }
+    return this._array;
   }
-  return this._array;
-};
+}
 
 exports.MappingList = MappingList;