Mesa (glsl2): exec_list: Add a new replace_with method.

[Ian Romanick]

Module: Mesa
Branch: glsl2
Commit: 1fdcdb2dca97cdf4b8f4790aa66587ff3e89e526
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=1fdcdb2dca97cdf4b8f4790aa66587ff3e89e526

Author: Kenneth Graunke <kenneth at whitecape.org>
Date:   Wed Jul 14 12:14:26 2010 -0700

exec_list: Add a new replace_with method.

---

 src/glsl/list.h |   11 +++++++++++
 1 files changed, 11 insertions(+), 0 deletions(-)

diff --git a/src/glsl/list.h b/src/glsl/list.h
index 48502fb..29997c7 100644
--- a/src/glsl/list.h
+++ b/src/glsl/list.h
@@ -165,6 +165,17 @@ struct exec_node {
       this->prev->next = before;
       this->prev = before;
    }
+   /**
+    * Replace the current node with the given node.
+    */
+   void replace_with(exec_node *replacement)
+   {
+      replacement->prev = this->prev;
+      replacement->next = this->next;
+
+      this->prev->next = replacement;
+      this->next->prev = replacement;
+   }
 
    /**
     * Is this the sentinal at the tail of the list?