fixing andreyvit's issue with parentheses not being applied to multi-operators as the condition clause of a switch...

lib/nodes.js

@@ -1658,9 +1658,6 @@
       this.body = body;
       this.else_body = null;
       this.tags = tags || {};
-      if (this.condition instanceof Array) {
-        this.multiple = true;
-      }
       if (this.tags.invert) {
         this.condition = new OpNode('!', new ParentheticalNode(this.condition));
       }
@@ -1695,16 +1692,17 @@
         this.switch_subject = variable;
       }
       this.condition = (function() {
-        if (this.multiple) {
-          _b = []; _c = this.condition;
-          for (i = 0, _d = _c.length; i < _d; i++) {
-            cond = _c[i];
-            _b.push(new OpNode('==', (i === 0 ? this.assigner : this.switch_subject), cond));
-          }
-          return _b;
-        } else {
-          return new OpNode('==', this.assigner, this.condition);
+        _b = []; _c = flatten([this.condition]);
+        for (i = 0, _d = _c.length; i < _d; i++) {
+          cond = _c[i];
+          _b.push((function() {
+            if (cond instanceof OpNode) {
+              cond = new ParentheticalNode(cond);
+            }
+            return new OpNode('==', (i === 0 ? this.assigner : this.switch_subject), cond);
+          }).call(this));
         }
+        return _b;
       }).call(this);
       if (this.is_chain) {
         this.else_body_node().switches_over(this.switch_subject);

src/nodes.coffee

@@ -1234,7 +1234,6 @@ exports.IfNode: class IfNode extends BaseNode
     @body:      body
     @else_body: null
     @tags:      tags or {}
-    @multiple:  true if @condition instanceof Array
     @condition: new OpNode('!', new ParentheticalNode(@condition)) if @tags.invert
     @is_chain:  false
 
@@ -1259,11 +1258,9 @@ exports.IfNode: class IfNode extends BaseNode
       variable: literal(o.scope.free_variable())
       @assigner: new AssignNode(variable, @switch_subject)
       @switch_subject: variable
-    @condition: if @multiple
-      for cond, i in @condition
-        new OpNode('==', (if i is 0 then @assigner else @switch_subject), cond)
-    else
-      new OpNode('==', @assigner, @condition)
+    @condition: for cond, i in flatten [@condition]
+      cond: new ParentheticalNode(cond) if cond instanceof OpNode
+      new OpNode('==', (if i is 0 then @assigner else @switch_subject), cond)
     @else_body_node().switches_over(@switch_subject) if @is_chain
     # prevent this rewrite from happening again
     @switch_subject: undefined