return void 0 instead of null in null propagating and null check call…

… expressions
alongubkin · Nov 15, 2014 · 7f42076 · 7f42076
1 parent d72a2a8
commit 7f42076
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Showing 3 changed files with 104 additions and 94 deletions.
diff --git a/lib/ast/expressions/NullCheckCallExpression.js b/lib/ast/expressions/NullCheckCallExpression.js
@@ -122,9 +122,14 @@ exports.NullCheckCallExpression.prototype.codegen = function () {
     this.test = test;
     this.consequent = consequent;
     this.alternate = {
-      "type": "Literal",
-      "value": null,
-      "raw": "null"
+      "type": "UnaryExpression",
+      "operator": "void",
+      "argument": {
+        "type": "Literal",
+        "value": 0,
+        "raw": "0"
+      },
+      "prefix": true
     };
   }
   return this;

diff --git a/lib/ast/expressions/NullPropagatingExpression.js b/lib/ast/expressions/NullPropagatingExpression.js
@@ -149,9 +149,14 @@ exports.NullPropagatingExpression.prototype.codegen = function () {
       "computed": false
     },
     "alternate": {
-      "type": "Literal",
-      "value": null,
-      "raw": "null"
+      "type": "UnaryExpression",
+      "operator": "void",
+      "argument": {
+        "type": "Literal",
+        "value": 0,
+        "raw": "0"
+      },
+      "prefix": true
     },
     "__null_propagating": true
   };