From 3ae818860b1d89bd83e7579ee99314eeff95053a Mon Sep 17 00:00:00 2001
From: satyr <murky.satyr@gmail.com>
Date: Tue, 9 Nov 2010 16:27:21 +0900
Subject: [PATCH] fixed a bug where postfix `?` was incorrectly unwrapping its
 operand

---
 lib/nodes.js               | 2 +-
 src/nodes.coffee           | 2 +-
 test/test_existence.coffee | 3 +++
 3 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/lib/nodes.js b/lib/nodes.js
index 34289f60..a2b66491 100644
--- a/lib/nodes.js
+++ b/lib/nodes.js
@@ -1594,7 +1594,7 @@
     Existence.prototype.invert = NEGATE;
     Existence.prototype.compileNode = function(o) {
       var code, sym;
-      code = this.expression.compile(o);
+      code = this.expression.compile(o, LEVEL_OP);
       code = IDENTIFIER.test(code) && !o.scope.check(code) ? this.negated ? "typeof " + code + " == \"undefined\" || " + code + " === null" : "typeof " + code + " != \"undefined\" && " + code + " !== null" : (sym = this.negated ? '==' : '!=', "" + code + " " + sym + " null");
       if (o.level <= LEVEL_COND) {
         return code;
diff --git a/src/nodes.coffee b/src/nodes.coffee
index 3007b085..ed2cae7a 100644
--- a/src/nodes.coffee
+++ b/src/nodes.coffee
@@ -1216,7 +1216,7 @@ exports.Existence = class Existence extends Base
   constructor: (@expression) ->
 
   compileNode: (o) ->
-    code = @expression.compile o
+    code = @expression.compile o, LEVEL_OP
     code = if IDENTIFIER.test(code) and not o.scope.check code
       if @negated
         "typeof #{code} == \"undefined\" || #{code} === null"
diff --git a/test/test_existence.coffee b/test/test_existence.coffee
index 097940f7..8c8e2bb7 100644
--- a/test/test_existence.coffee
+++ b/test/test_existence.coffee
@@ -160,3 +160,6 @@ eq 1,   a?.b.c +  1
 eq 1,   a?.b.c += 1
 eq 2,   ++a?.b.c
 eq yes, delete a?.b.c
+
+
+eq (1 or 0)?, true, 'postfix `?` should unwrap correctly'