fix glayzzle#137

Author: ichiriac

dist/php-parser.js

@@ -1,4 +1,4 @@
-/*! php-parser - BSD3 License - 2018-04-11 */
+/*! php-parser - BSD3 License - 2018-04-13 */
 
 require=(function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
 /*!
@@ -6010,7 +6010,7 @@ module.exports = {
    * ```
    */
   read_assignment_list: function read_assignment_list() {
-    return this.read_list(this.read_assignment_list_element, ",");
+    return this.read_list(this.read_assignment_list_element, ",", true);
   },
 
   /**
@@ -7606,7 +7606,7 @@ module.exports = {
     var result = [];
 
     if (this.token == separator) {
-      if (preserveFirstSeparator) result.push("");
+      if (preserveFirstSeparator) result.push(null);
       this.next();
     }
 

dist/php-parser.min.js

@@ -492,7 +492,7 @@ module.exports = {
    * ```
    */
   read_assignment_list: function() {
-    return this.read_list(this.read_assignment_list_element, ",");
+    return this.read_list(this.read_assignment_list_element, ",", true);
   },
 
   /**

dist/php-parser.min.js.map

@@ -34,7 +34,7 @@ module.exports = {
     const result = [];
 
     if (this.token == separator) {
-      if (preserveFirstSeparator) result.push("");
+      if (preserveFirstSeparator) result.push(null);
       this.next();
     }
 

src/parser/expr.js

@@ -228,6 +228,20 @@ describe("Test expressions", function() {
     // @todo
   });
 
+  it("fix #137", function() {
+    var ast = parser.parseEval(
+      "list(,,$a,,$b) = [null, 1, null, 2];",
+      {
+        ast: {
+          withPositions: true
+        }
+      }
+    );
+    const list = ast.children[0].left;
+    list.arguments.length.should.be.exactly(5);
+    list.arguments[2].name.should.be.exactly('a');
+  });
+
   it("test incr/decr", function() {
     var ast = parser.parseEval(
       ["$i++;", "$i--;", "++$i;", "--$i;"].join("\n"),