From 5d73bc8e192c694b4f983b265e7de4e6998f36b8 Mon Sep 17 00:00:00 2001
From: David Rose <david@ddrose.com>
Date: Tue, 20 Jan 2009 03:17:59 +0000
Subject: [PATCH] operator bool()

---
 panda/src/pgraph/nodePath.I | 11 +++++++++++
 panda/src/pgraph/nodePath.h |  2 ++
 2 files changed, 13 insertions(+)

diff --git a/panda/src/pgraph/nodePath.I b/panda/src/pgraph/nodePath.I
index bf9e92c0f9..40e20810d4 100644
--- a/panda/src/pgraph/nodePath.I
+++ b/panda/src/pgraph/nodePath.I
@@ -222,6 +222,17 @@ is_empty() const {
   return (_head == (NodePathComponent *)NULL);
 }
 
+////////////////////////////////////////////////////////////////////
+//     Function: NodePath::operator bool
+//       Access: Published
+//  Description: Returns true if the NodePath is valid (not empty),
+//               or false if it contains no nodes.
+////////////////////////////////////////////////////////////////////
+INLINE NodePath::
+operator bool () const {
+  return !is_empty();
+}
+
 ////////////////////////////////////////////////////////////////////
 //     Function: NodePath::is_singleton
 //       Access: Published
diff --git a/panda/src/pgraph/nodePath.h b/panda/src/pgraph/nodePath.h
index 17326e63ed..4f9a929c7f 100644
--- a/panda/src/pgraph/nodePath.h
+++ b/panda/src/pgraph/nodePath.h
@@ -177,6 +177,8 @@ PUBLISHED:
 
   // Methods to query a NodePath's contents.
   INLINE bool is_empty() const;
+  INLINE operator bool () const;
+
   INLINE bool is_singleton(Thread *current_thread = Thread::get_current_thread()) const;
   int get_num_nodes(Thread *current_thread = Thread::get_current_thread()) const;
   PandaNode *get_node(int index, Thread *current_thread = Thread::get_current_thread()) const;